WO2022259900A1 - Film capacitor - Google Patents

Film capacitor Download PDF

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Publication number
WO2022259900A1
WO2022259900A1 PCT/JP2022/022001 JP2022022001W WO2022259900A1 WO 2022259900 A1 WO2022259900 A1 WO 2022259900A1 JP 2022022001 W JP2022022001 W JP 2022022001W WO 2022259900 A1 WO2022259900 A1 WO 2022259900A1
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Prior art keywords
electrode
electrodes
divided
lateral direction
small
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PCT/JP2022/022001
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French (fr)
Japanese (ja)
Inventor
正仁 佐野
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パナソニックＩｐマネジメント株式会社
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Application filed by パナソニックＩｐマネジメント株式会社 filed Critical パナソニックＩｐマネジメント株式会社
Priority to CN202280040133.4A priority Critical patent/CN117461103A/en
Priority to JP2023527622A priority patent/JPWO2022259900A1/ja
Publication of WO2022259900A1 publication Critical patent/WO2022259900A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G4/00—Fixed capacitors; Processes of their manufacture
    • H01G4/32—Wound capacitors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G4/00—Fixed capacitors; Processes of their manufacture
    • H01G4/40—Structural combinations of fixed capacitors with other electric elements, the structure mainly consisting of a capacitor, e.g. RC combinations

Definitions

  • the present disclosure generally relates to film capacitors, and more particularly relates to film capacitors used in electronic equipment, electrical equipment, industrial equipment, automobiles, and the like.
  • Patent Document 1 discloses a film capacitor. This film capacitor employs a structure in which two capacitors are connected in series.
  • the film capacitor of Patent Document 1 is a film capacitor having a structure in which two films are stacked and wound into a cylindrical shape.
  • a partial electrode that is divided into two in the film width direction and divided into a plurality of parts in the winding direction is vapor-deposited.
  • a plurality of sets of two partial electrodes arranged in the film width direction are connected to each other via a security mechanism positioned between the two partial electrodes for each set.
  • Patent Literature 1 has the problem that it is not possible to alleviate the sudden concentration of current at the time of dielectric breakdown. Concentration of current increases the risk of penetrating breakdown.
  • An object of the present disclosure is to provide a film capacitor that can reduce the risk of through breakdown even if dielectric breakdown occurs.
  • a film capacitor according to an aspect of the present disclosure includes a dielectric film having a first surface and a second surface opposite to the first surface and extending in a longitudinal direction orthogonal to a lateral direction; It comprises a first electrode arranged on one surface and a second electrode arranged on the second surface.
  • the film capacitor includes two unit capacitors connected in series in the lateral direction by facing the first electrode and the second electrode via the dielectric film.
  • the first electrode is separated into two large split electrodes by the first margin extending in the longitudinal direction.
  • Each of the two large split electrodes is divided into a plurality of partial electrodes aligned in the longitudinal direction by a first lateral direction slit extending in the lateral direction.
  • the second electrode is a sub-divided electrode, and end margin portions extending in the longitudinal direction are present on both sides of the sub-divided electrode in the lateral direction.
  • the sub-divided electrodes are divided into a plurality of sub-electrode groups aligned in the longitudinal direction by second lateral direction slit portions extending in the lateral direction.
  • FIG. 1 is an explanatory diagram showing the film capacitor according to the first embodiment.
  • FIG. 2 is an explanatory diagram showing a film capacitor according to the second embodiment.
  • FIG. 3 is an explanatory diagram showing a film capacitor according to the third embodiment.
  • FIG. 4 is a schematic cross-sectional view showing a film capacitor according to a fourth embodiment.
  • FIG. 5 is an explanatory diagram showing the film capacitor same as the above.
  • FIG. 6 is an explanatory diagram showing a film capacitor according to the fifth embodiment.
  • FIG. 7A is a schematic cross-sectional view showing a film capacitor including one unit capacitor in the width direction.
  • FIG. 7B is an explanatory diagram showing the same film capacitor.
  • FIG. 8A is a schematic cross-sectional view showing a film capacitor including two unit capacitors connected in series in the width direction.
  • FIG. 8B is an explanatory diagram showing the same film capacitor.
  • FIG. 9A is a schematic cross-sectional view showing a film capacitor including three unit capacitors connected in series in the width direction.
  • FIG. 9B is an explanatory diagram showing the same film capacitor.
  • FIG. 10 is a schematic perspective view showing an example of a film capacitor.
  • FIG. 10 shows an example of a film capacitor 1 .
  • the film capacitor 1 has, for example, a cylindrical shape.
  • the film capacitor 1 is formed, for example, by stacking and winding two elongated dielectric films 2 (a first dielectric film 21 and a second dielectric film 22).
  • the first electrode 31 is arranged on one side of the first dielectric film 21 .
  • a second electrode 32 is arranged on one side of the second dielectric film 22 .
  • the first electrode 31 and the second electrode 32 face each other with the dielectric film 2 interposed therebetween.
  • Edge electrodes 30 (a first edge electrode 310 and a second edge electrode 320) are formed at both ends of the film capacitor 1 .
  • the first electrode 31 is connected to the first edge electrode 310 .
  • the second electrode 32 is connected to the second edge electrode 320 .
  • the film capacitor 1 can include one to three unit capacitors 10 in the lateral direction S (width direction) of the dielectric film 2 (see FIGS. 7A, 8A and 9A). This point will be described below.
  • one side of the transversal direction S may be called “left side” and the other side may be called “right side.”
  • the film capacitor 1 shown in FIG. 7A includes one unit capacitor 10 in the lateral direction S of the dielectric film 2.
  • FIG. 7A shows one unit capacitor 10 in the lateral direction S of the dielectric film 2.
  • a first edge margin portion 241 is arranged on the right edge of one side of the first dielectric film 21 .
  • the first electrode 31 is arranged on the entire one side of the first dielectric film 21 except for the first end margin portion 241 .
  • the first electrode 31 includes the left end portion of one side of the first dielectric film 21 and is connected to the first edge electrode 310 at this portion (see FIG. 7A).
  • the presence of the first edge margin portion 241 separates the first electrode 31 and the second edge electrode 320 from each other.
  • a second edge margin portion 242 is arranged at the left edge of one side of the second dielectric film 22 .
  • a second electrode 32 is arranged on the entire one side of the second dielectric film 22 excluding the second end margin portion 242 .
  • the second electrode 32 includes the right edge of one side of the second dielectric film 22 and is connected to the second edge electrode 320 at this portion (see FIG. 7A).
  • the presence of the second end margin portion 242 separates the second electrode 32 from the first end face electrode 310 .
  • one unit capacitor 10 is formed in a portion where the first electrode 31 and the second electrode 32 face each other with the dielectric film 2 (first dielectric film 21) interposed therebetween.
  • the film capacitor 1 shown in FIG. 8A includes two unit capacitors 10 connected in series in the transverse direction S of the dielectric film 2 .
  • the first electrode 31 is divided into left and right sides by a first margin portion 211 .
  • the left first electrode 31 includes the left end portion of one side of the first dielectric film 21 and is connected to the first edge electrode 310 at this portion.
  • the right first electrode 31 includes the right end portion of one side of the first dielectric film 21 and is connected to the second edge electrode 320 at this portion (see FIG. 8A).
  • second edge margin portions 242 are arranged at the left edge and right edge of one side of the second dielectric film 22 .
  • the second electrode 32 is arranged entirely between the second end margin portions 242 on both sides. The presence of the second edge margin portions 242 on both sides separates the second electrode 32 from the first edge electrode 310 and the second edge electrode 320 .
  • two unit capacitors 10 are formed in the portion where the first electrode 31 and the second electrode 32 face each other with the dielectric film 2 (first dielectric film 21) interposed therebetween. These unit capacitors 10 are connected in series in the lateral direction S. As shown in FIG. 8A, two unit capacitors 10 are formed in the portion where the first electrode 31 and the second electrode 32 face each other with the dielectric film 2 (first dielectric film 21) interposed therebetween. These unit capacitors 10 are connected in series in the lateral direction S. As shown in FIG.
  • the film capacitor 1 shown in FIG. 9A includes three unit capacitors 10 connected in series in the transverse direction S of the dielectric film 2 .
  • the first electrode 31 is divided into left and right sides by a first margin portion 211 .
  • the left first electrode 31 includes the left edge of one side of the first dielectric film 21 and is connected to the first edge electrode 310 at this portion (see FIG. 9A).
  • a first edge margin portion 241 is arranged at the right edge of one side of the first dielectric film 21 .
  • the first electrode 31 on the right side is arranged entirely between the first margin portion 211 and the first end margin portion 241 .
  • the presence of the first end margin portion 241 separates the right first electrode 31 and the second end face electrode 320 from each other.
  • the second electrode 32 is divided into left and right sides by the second margin portion 212 .
  • the right second electrode 32 includes the right edge of one side of the second dielectric film 22 and is connected to the second edge electrode 320 at this portion (see FIG. 9A).
  • a second edge margin portion 242 is arranged at the left edge of one side of the second dielectric film 22 .
  • the left second electrode 32 is disposed entirely between the second end margin portion 242 and the second margin portion 212 . The presence of the second edge margin portion 242 separates the left second electrode 32 from the first edge electrode 310 .
  • FIG. 9A three unit capacitors 10 are formed in portions where the first electrode 31 and the second electrode 32 face each other with the dielectric film 2 (first dielectric film 21) interposed therebetween. These unit capacitors 10 are connected in series in the lateral direction S. As shown in FIG. 9A, three unit capacitors 10 are formed in portions where the first electrode 31 and the second electrode 32 face each other with the dielectric film 2 (first dielectric film 21) interposed therebetween. These unit capacitors 10 are connected in series in the lateral direction S. As shown in FIG.
  • the voltage applied to the film capacitors 1 shown in FIGS. 7A, 8A and 9A is the same, the voltage applied to the unit capacitor 10 of the film capacitor 1 shown in FIG. 9A is By making it the smallest, it becomes easier to suppress damage to the dielectric film 2 .
  • the present inventor further improved the film capacitor 1 in which a plurality of unit capacitors 10 are connected in series in the lateral direction S, and developed the following film capacitor 1.
  • the first electrode 31 is separated into two large split electrodes 7 by the first margin portion 211 .
  • Each of the two large split electrodes 7 is split into a plurality of partial electrodes 710 by the first transverse direction slit portions 221 .
  • the second electrode 32 is the sub-divided electrode 8 .
  • End margin portions 242 are present on both sides of the sub-divided electrode 8 in the lateral direction S.
  • the sub-divided electrode 8 is divided into a plurality of sub-electrode groups 520 by the second lateral direction slit portions 222 .
  • Small electrode group 520 includes a plurality of small electrodes 521 .
  • the first unit capacitor 10 is formed in the portion (Z1 portion in FIG. 1) where the large divided electrode 7 on the left and the small electrode 521 on the left face each other with the dielectric film 2 interposed therebetween.
  • a second unit capacitor 10 is formed in a portion (Z2 portion in FIG. 1) where the right large divided electrode 7 and the right small electrode 521 face each other with the dielectric film 2 interposed therebetween.
  • each of the two large split electrodes 7 of the first electrode 31 is split into a plurality of partial electrodes 710, and the small split electrodes 8 of the second electrode 32 are also split into a plurality of small electrode groups 520. Since it is divided, even if a dielectric breakdown occurs in a certain portion (for example, point P in FIG. 1) between the first electrode 31 and the second electrode 32, the other portion (point P in FIG. 1) can be transferred to the portion where the dielectric breakdown occurred. Inflow of current from Q) can be suppressed by the first transverse direction slit portion 221 and the second transverse direction slit portion 222 .
  • the film capacitor 1 according to this embodiment may be of the wound type or the laminated type.
  • dielectric breakdown means a phenomenon in which when a voltage is applied to the dielectric film 2, the applied voltage cannot be maintained.
  • Through-hole breakdown means a full-path breakdown that occurs not through the surface of the dielectric film 2 but through the inside.
  • the film capacitor 1 includes a dielectric film 2, a first electrode 31 and a second electrode 32.
  • the first electrode 31 and the second electrode 32 face each other with the dielectric film 2 (in this embodiment, the first dielectric film 21) interposed therebetween, and are connected in series in the lateral direction S. It contains two unit capacitors 10 (see FIG. 8A).
  • the dielectric film 2, the first electrode 31, and the second electrode 32 will be described below.
  • the dielectric film 2 is a film made of a dielectric.
  • the dielectric is not particularly limited, but examples thereof include polypropylene (PP) and polyethylene terephthalate (PET).
  • the dielectric film 2 has an elongated film shape. That is, the dielectric film 2 is a film extending in the longitudinal direction L orthogonal to the lateral direction S. As shown in FIG.
  • the dielectric film 2 has a first surface 201 and a second surface 202 (see FIG. 8A).
  • the first surface 201 is a surface facing one side in the thickness direction T of the dielectric film 2 .
  • a thickness direction T is a direction orthogonal to the lateral direction S and the longitudinal direction L.
  • the second surface 202 is the surface opposite to the first surface 201 . That is, the second surface 202 is a surface facing the other side in the thickness direction T of the dielectric film 2 .
  • the dielectric film 2 includes a first dielectric film 21 and a second dielectric film 22.
  • the first electrode 31 may be any of a vapor deposition electrode, a metal foil electrode, and a plated electrode.
  • the material of the first electrode 31 is not particularly limited, but examples thereof include aluminum.
  • the first electrode 31 is arranged on the first surface 201 of the dielectric film 2 (the first dielectric film 21 in this embodiment).
  • the first electrode 31 is separated into two large split electrodes 7 by a first margin portion 211 .
  • the first margin portion 211 is a portion of the first surface 201 of the first dielectric film 21 where the first electrode 31 is not arranged. Therefore, the dielectric film 2 is exposed at this portion.
  • the first margin portion 211 extends in the longitudinal direction L with a constant width.
  • One of the two large split electrodes 7 is an electrode arranged on one side (left side) in the transverse direction S.
  • the other of the two large split electrodes 7 is an electrode arranged on the other side (right side) in the transverse direction S. As shown in FIG.
  • Each of the two large split electrodes 7 is split into a plurality of partial electrodes 710 by at least one or more first transverse direction slits 221 .
  • the first transverse direction slit portion 221 is a portion of the first surface 201 of the first dielectric film 21 where the first electrode 31 is not arranged. Accordingly, the dielectric film 2 is exposed in this portion as well as in the first margin portion 211 .
  • the first lateral direction slit portion 221 extends in the lateral direction S with a constant width.
  • the first transverse direction slit portion 221 is connected to one (left) end and the other (right) end of the first dielectric film 21 in the transverse direction S. As shown in FIG. Therefore, the first transverse direction slit portion 221 crosses the first margin portion 211 .
  • the width of the first lateral direction slit portion 221 is the same as the width of the first margin portion 211, but may be different within a range that does not impair the effects of the present embodiment.
  • the plurality of partial electrodes 710 are arranged in the longitudinal direction L.
  • the shape of the partial electrode 710 is rectangular, but is not particularly limited.
  • the sizes of the plurality of partial electrodes 710 are the same in this embodiment, they may be different as long as the effects of this embodiment are not impaired.
  • the second electrode 32 may also be any of a vapor deposition electrode, a metal foil electrode, and a plated electrode.
  • the material of the second electrode 32 is also the same as the material of the first electrode 31 .
  • the second electrode 32 is arranged on the second surface 202 of the dielectric film 2 (the first dielectric film 21 in this embodiment). In other words, the second electrode 32 is arranged on the first surface 201 of the second dielectric film 22 in this embodiment.
  • the second electrode 32 is the subdivided electrode 8 .
  • End margin portions 242 are present on both sides of the sub-divided electrode 8 in the lateral direction S. As shown in FIG.
  • the end margin portions 242 are present at one (left) end and the other (right) end in the transverse direction S of the second dielectric film 22 .
  • the end margin portion 242 is a portion where the second electrode 32 is not arranged. Therefore, the dielectric film 2 is exposed at this portion.
  • the end margin portion 242 extends in the longitudinal direction L with a constant width. The existence of the end margin portion 242 allows the second electrode 32 (the sub-divided electrode 8) to be separated from the first end surface electrode 310 and the second end surface electrode 320 .
  • sub-divided electrode 8 is divided into a plurality of sub-electrode groups 520 by at least one or more second lateral direction slits 222 .
  • the second lateral direction slit portion 222 is a portion of the first surface 201 of the second dielectric film 22 where the second electrode 32 is not arranged. Accordingly, the dielectric film 2 is exposed in this portion as well as in the edge margin portion 242 .
  • the second transverse direction slit portion 222 extends in the transverse direction S with a constant width.
  • the second lateral direction slit portion 222 is connected to the left and right end margin portions 242 .
  • the width of the second lateral direction slit portion 222 is the same as the width of the end margin portion 242, but may be different within a range that does not impair the effects of the present embodiment.
  • the width of the second transverse direction slit portion 222 is the same as the width of the first transverse direction slit portion 221, but may differ within a range that does not impair the effects of the present embodiment.
  • the plurality of small electrode groups 520 are arranged in the longitudinal direction L.
  • the small electrode group 520 includes a plurality of (two in this embodiment) small electrodes 521 .
  • the plurality of small electrodes 521 are arranged in the lateral direction S.
  • the shape of the small electrodes 521 is rectangular, but is not particularly limited.
  • the sizes of the plurality of small electrodes 521 are the same in this embodiment, they may be different as long as the effects of this embodiment are not impaired.
  • a plurality of small electrodes 521 included in each of the plurality of small electrode groups 520 are connected by fuses 62 .
  • the fuse 62 is a part that melts and cuts off the circuit when an excessive current flows.
  • the fuse 62 connects the small electrodes 521 adjacent to each other in the lateral direction S. As shown in FIG.
  • the width of the fuse 62 is shorter than the length of the small electrode 521 in the longitudinal direction L.
  • the second electrode 32 described above faces the first electrode 31 via the dielectric film 2 (the first dielectric film 21 in this embodiment).
  • the second electrode 32 (the small segmented electrode 8) faces the large segmented electrode 7 on the left side of the first electrode 31 through the dielectric film 2.
  • the left small electrode 521 of the second electrode 32 faces the left partial electrode 710 of the first electrode 31 with the dielectric film 2 interposed therebetween.
  • a first unit capacitor 10 is formed in this portion.
  • the film capacitor 1 includes a plurality of unit capacitor groups (one unit capacitor group is a portion C surrounded by a dashed line in FIG. 1).
  • a plurality of unit capacitor groups are arranged in the longitudinal direction L.
  • Each of the plurality of unit capacitor groups is connected to the facet electrode 30 (the first facet electrode 310 and the second facet electrode 320). That is, a plurality of unit capacitor groups are connected in parallel.
  • Each unit capacitor group includes two unit capacitors 10 connected in series in the transverse direction S. As shown in FIG.
  • ⁇ Effect> For example, as shown in FIG. 8, when a dielectric breakdown occurs at point P, a current can flow from around point P toward point P. In FIG. Assuming that a point around point P is point Q, current can flow from point Q toward point P along a straight path. As a result, dielectric breakdown may lead to penetration breakdown immediately.
  • the first electrode 31 is a solid electrode extending in the longitudinal direction L.
  • the partial electrode 710 where the point P exists and the partial electrode 710 where the point Q exists are separated by the first lateral direction slit portion 221 .
  • the first electrode 31 is divided in the longitudinal direction L into a plurality of parts.
  • each of the two large split electrodes 7 of the first electrode 31 is split into a plurality of partial electrodes 710, and the small split electrodes 8 of the second electrode 32 are also split into a plurality of small electrodes. Since it is divided into the electrode group 520, even if a dielectric breakdown occurs in a certain portion between the first electrode 31 and the second electrode 32, it is possible to prevent current from flowing into this dielectrically broken portion from other portions. It can be suppressed by the first lateral direction slit portion 221 and the second lateral direction slit portion 222 .
  • the film capacitor 1 according to this embodiment differs from the first embodiment shown in FIG. Although it is common to the film capacitor 1, it differs from the film capacitor 1 according to the first embodiment in that the number of unit capacitors 10 connected in series in the lateral direction S is three.
  • the first electrode 31 and the second electrode 32 face each other with the dielectric film 2 (in this embodiment, the first dielectric film 21) interposed therebetween.
  • S includes three unit capacitors 10 connected in series (see FIG. 9A).
  • the first electrode 31 is separated into a first large segmented electrode 71 and a first small segmented electrode 81 by a first margin portion 211 .
  • the first large split electrode 71 is arranged between the first margin portion 211 and the end portion of the first dielectric film 21 on one side (left side) in the transverse direction S.
  • the first large split electrode 71 is split into a plurality of first partial electrodes 710 by at least one or more first lateral direction slit portions 221 .
  • the first lateral direction slit portion 221 is connected to one side (left side) of the first dielectric film 21 in the lateral direction S and the first margin portion 211 .
  • the plurality of first partial electrodes 710 are arranged in the longitudinal direction L.
  • the left end of each of the plurality of first partial electrodes 710 can be connected to the first end face electrode 310 (not shown in FIG. 2).
  • the first sub-divided electrode 81 is arranged between the first margin portion 211 and the first end margin portion 241 .
  • the first end margin portion 241 exists at the end of the first dielectric film 21 on the other side (right side) in the transverse direction S. Similarly to the first margin portion 211, the first end margin portion 241 is also a portion where the first electrode 31 is not arranged. Therefore, the dielectric film 2 is also exposed in this portion.
  • the first end margin portion 241 extends in the longitudinal direction L with a constant width. The presence of the first edge margin portion 241 allows the first sub-divided electrode 81 and the second edge electrode 320 (not shown in FIG. 2) to be separated from each other.
  • the width of the first end margin portion 241 is the same as the width of the first margin portion 211, but may be different within a range that does not impair the effects of the present embodiment.
  • the first sub-divided electrode 81 is divided into a plurality of first sub-electrode groups 510 by at least one or more first lateral direction slits 221 .
  • the first lateral direction slit portion 221 is connected to the first margin portion 211 and the first end margin portion 241 .
  • the plurality of first small electrode groups 510 are arranged in the longitudinal direction L.
  • the first small electrode group 510 is aligned in the lateral direction S with the first partial electrodes 710 .
  • the first small electrode group 510 includes a plurality of (two in this embodiment) first small electrodes 511 .
  • the plurality of first small electrodes 511 are arranged in the lateral direction S. As shown in FIG.
  • the shape of the first small electrode 511 is rectangular, but is not particularly limited. Also, in this embodiment, the sizes of the plurality of first small electrodes 511 are the same, but they may be different as long as the effects of this embodiment are not impaired.
  • a plurality of first small electrodes 511 included in each of the plurality of first small electrode groups 510 are connected by a first fuse 61 .
  • the first fuse 61 like the fuse 62 of the first embodiment, is a portion that melts when an excessive current flows to cut off the circuit.
  • the first fuse 61 connects the first small electrodes 511 adjacent in the lateral direction S to each other.
  • the width of the first fuse 61 is shorter than the length in the longitudinal direction L of the first small electrode 511 .
  • the second electrode 32 is separated by a second margin portion 212 into a second large segmented electrode 72 and a second small segmented electrode 82 .
  • the second margin portion 212 is a portion of the first surface 201 of the second dielectric film 22 where the second electrode 32 is not arranged. Therefore, the dielectric film 2 is exposed at this portion.
  • the second margin portion 212 extends in the longitudinal direction L with a constant width.
  • the width of the second margin portion 212 is the same as the width of the first margin portion 211, but may be different within a range that does not impair the effects of the present embodiment.
  • the second large split electrode 72 is arranged between the second margin portion 212 and the other (right) end of the second dielectric film 22 in the transverse direction S.
  • the second large split electrode 72 is split into a plurality of second partial electrodes 720 by second lateral direction slits 222 .
  • the second lateral direction slit portion 222 is connected to one side (right side) of the second dielectric film 22 in the lateral direction S and the second margin portion 212 .
  • the plurality of second partial electrodes 720 are arranged in the longitudinal direction L.
  • the right end of each of the plurality of second partial electrodes 720 can be connected to the second end face electrode 320 (not shown in FIG. 2).
  • the second sub-divided electrode 82 is arranged between the second margin portion 212 and the second end margin portion 242 .
  • the second edge margin portion 242 exists at one side (left side) edge in the transverse direction S of the second dielectric film 22 .
  • the presence of the second edge margin portion 242 allows the second sub-divided electrode 82 and the first edge electrode 310 (not shown in FIG. 2) to be separated from each other.
  • the width of the second end margin portion 242 is the same as the width of the second margin portion 212, but may be different within a range that does not impair the effects of the present embodiment.
  • the second sub-divided electrode 82 is divided into a plurality of second sub-electrode groups 520 by at least one or more second lateral direction slits 222 .
  • the plurality of second small electrode groups 520 are arranged in the longitudinal direction L.
  • the second small electrode group 520 is aligned in the lateral direction S with the second partial electrodes 720 .
  • the second small electrode group 520 includes a plurality of (two in this embodiment) second small electrodes 521 .
  • the plurality of second small electrodes 521 are arranged in the lateral direction S. As shown in FIG. In this embodiment, the shape of the second small electrode 521 is rectangular, but is not particularly limited. In addition, although the sizes of the plurality of second small electrodes 521 are the same in this embodiment, they may be different as long as the effects of this embodiment are not impaired.
  • a plurality of second small electrodes 521 included in each of the plurality of second small electrode groups 520 are connected by a second fuse 62 .
  • the second fuse 62 like the first fuse 61, is a portion that melts when an excessive current flows to cut off the circuit.
  • the second fuse 62 connects the second small electrodes 521 adjacent to each other in the lateral direction S. As shown in FIG.
  • the width of the second fuse 62 is shorter than the length in the longitudinal direction L of the second small electrode 521 .
  • the second electrode 32 described above faces the first electrode 31 via the dielectric film 2 (the first dielectric film 21 in this embodiment).
  • a film capacitor 1 according to the present embodiment also includes a plurality of unit capacitor groups (a portion C surrounded by a dashed line in FIG. 2 is one unit capacitor group) as in the first embodiment.
  • a plurality of unit capacitor groups are arranged in the longitudinal direction L.
  • Each of the plurality of unit capacitor groups is connected to the edge electrode 30 (the first edge electrode 310 and the second edge electrode 320). That is, a plurality of unit capacitor groups are connected in parallel.
  • each unit capacitor group in this embodiment includes three unit capacitors 10 connected in series in the lateral direction S. As shown in FIG.
  • the film capacitor 1 according to this embodiment includes three unit capacitors 10 connected in series in the transverse direction S of the dielectric film 2, like the film capacitor 1 shown in FIG. 9A. Therefore, the voltage applied between the first end surface electrode 310 and the second end surface electrode 320 of the film capacitor 1 shown in FIGS. 7A and 8A and the first end surface electrode 310 and the second end surface of the film capacitor 1 according to the present embodiment
  • the voltage applied between the electrodes 320 is the same
  • the voltage applied to the unit capacitor 10 of the film capacitor 1 according to the present embodiment is higher than the voltage applied to the unit capacitor 10 of the film capacitor 1 shown in FIGS. 7A and 8A. By reducing the applied voltage, it becomes easier to suppress damage to the dielectric film 2 .
  • the plurality of first small electrodes 511 are connected by the first fuse 61
  • the plurality of second small electrodes 521 are connected by the second fuse. 62 are connected. Therefore, even if a part between the first electrode 31 and the second electrode 32 is short-circuited, at least one of the first fuse 61 and the second fuse 62 is disconnected.
  • the film capacitor 1 according to the present embodiment includes three unit capacitors 10 connected in series in the transverse direction S. , but differs from the film capacitor 1 according to the second embodiment in that a first connection portion 91 and a second connection portion 92 are further present.
  • the description will focus on the differences from the second embodiment.
  • the first connection portion 91 is present at one side (left side) end in the transverse direction S of the dielectric film 2 (first dielectric film 21).
  • the first connecting portion 91 exists between the first partial electrodes 710 adjacent to each other in the longitudinal direction L. As shown in FIG. In this manner, the plurality of first partial electrodes 710 are connected by the first connecting portion 91 .
  • the first connecting portion 91 has conductivity. Therefore, the first connecting portion 91 may be formed as part of the first electrode 31 . That is, the first connection portion 91 may be any of a vapor deposition electrode, a metal foil electrode, and a plated electrode.
  • the material of the first connecting portion 91 is not particularly limited, but examples thereof include aluminum.
  • the length of the first connecting portion 91 is shorter than the length of the first partial electrode 710 in the lateral direction S of the dielectric film 2 (first dielectric film 21). Therefore, between the first partial electrodes 710 adjacent in the longitudinal direction L, the first connecting portion 91 and the first transverse direction slit portion 221 are present.
  • the second connection portion 92 is present at the other (right) end in the transverse direction S of the dielectric film 2 (second dielectric film 22).
  • the second connection portion 92 exists between the second partial electrodes 720 adjacent to each other in the longitudinal direction L. As shown in FIG. In this manner, the plurality of second partial electrodes 720 are connected by the second connecting portion 92 .
  • the second connection part 92 has conductivity, like the first connection part 91 . Therefore, the second connection portion 92 may be formed as part of the second electrode 32 . That is, like the first connection portion 91, the second connection portion 92 may be any of a vapor deposition electrode, a metal foil electrode, and a plated electrode. The material of the second connection portion 92 is also the same as the material of the first connection portion 91 .
  • the length of the second connecting portion 92 is shorter than the length of the second partial electrode 720 in the lateral direction S of the dielectric film 2 (second dielectric film 22). Therefore, between the second partial electrodes 720 adjacent to each other in the longitudinal direction L, the second connecting portion 92 and the second lateral direction slit portion 222 are present.
  • a film capacitor 1 according to this embodiment also includes a plurality of unit capacitor groups, as in the second embodiment.
  • a plurality of unit capacitor groups are arranged in the longitudinal direction L.
  • Each of the plurality of unit capacitor groups is connected to the facet electrode 30 (the first facet electrode 310 and the second facet electrode 320). That is, a plurality of unit capacitor groups are connected in parallel.
  • Each unit capacitor group includes three unit capacitors 10 connected in series in the transverse direction S. As shown in FIG. However, the plurality of unit capacitor groups in this embodiment are connected by the first connection portion 91 and the second connection portion 92 .
  • a plurality of first partial electrodes are connected by the first connecting portion 91 and a plurality of second partial electrodes are connected by the second connecting portion 92 . That is, a plurality of unit capacitor groups are connected by the first connection portion 91 and the second connection portion 92 .
  • a film capacitor 1 according to a fourth embodiment will be described with reference to the drawings.
  • the same reference numerals as in the first to third embodiments may be assigned to the same components as in the first to third embodiments, and detailed description thereof may be omitted.
  • the film capacitor 1 according to this embodiment is common to the film capacitors 1 according to the second and third embodiments in that it includes three unit capacitors 10 connected in series in the transverse direction S, but the film capacitor 1 according to the transverse direction S is different from the film capacitors 1 according to the first to third embodiments in that it can include four or more unit capacitors 10 connected in series.
  • the film capacitor 1 according to this embodiment is obtained by expanding or generalizing the number of unit capacitors 10 connected in series in the lateral direction S to three or more.
  • the number of unit capacitors 10 connected in series in the lateral direction S is assumed to be n (where n is an integer of 3 or more).
  • the film capacitor 1 includes a portion (Z1 and Z4 portions) where the first large segmented electrode 71 and the second small segmented electrode 82 face each other with the dielectric film 2 interposed therebetween; There are portions (Z2 and Z3 portions) facing the sub-divided electrodes 82 .
  • the dielectric film 2 of this embodiment is the same as the dielectric films 2 of the first to third embodiments.
  • the first electrode 31 is separated by at least one or more first margin portions 211 into at least one or more first large segmented electrodes 71 and at least one or more first small segmented electrodes 81 .
  • the first electrodes 31 are separated into (n+1)/2 pieces.
  • the first electrode 31 is separated into one first large segmented electrode 71 and one first small segmented electrode 81 by one first margin portion 211 .
  • the first electrode 31 is connected to the first edge electrode 310 but not to the second edge electrode 320 .
  • the first large split electrode 71 arranged on one side (left side) in the short direction S of the dielectric film 2 is connected to the first end surface electrode 310.
  • the first sub-divided electrode 81 arranged on the other side (right side) of the dielectric film 2 in the transverse direction S is not connected to the second end surface electrode 320 .
  • the first electrode 31 is separated by at least two or more first margin portions 211 into at least two or more first large segmented electrodes 71 and at least one or more first small segmented electrodes 81 .
  • the first electrodes 31 are separated into (n+2)/2 pieces.
  • the first electrode 31 is separated into three (see FIGS. 4 and 5).
  • the first electrode 31 is separated into two first large split electrodes 71 and one first small split electrode 81 by two first margin portions 211 .
  • the first electrode 31 is connected to the first edge electrode 310 and the second edge electrode 320 .
  • the first large segmented electrode 71 arranged on one side (left side) in the short direction S of the dielectric film 2 is connected to the first end surface electrode 310
  • the first large split electrode 71 arranged on the other side (right side) of the dielectric film 2 in the transverse direction S is connected to the second end surface electrode 320 .
  • the first large segmented electrode 71 is preferably connected to the end face electrode 30 .
  • the first small electrode group 510 includes a plurality of (two in this embodiment) first small electrodes 511 (see FIGS. 2 and 5). A plurality of first small electrodes 511 are connected by a first fuse 61 .
  • the second electrode 32 is separated into at least one or more second large segmented electrodes 72 and at least one or more second small segmented electrodes 82 by at least one or more second margin portions 212 .
  • the second electrodes 32 are separated into (n+1)/2 pieces.
  • the second electrode 32 is separated into one second large segmented electrode 72 and one second small segmented electrode 82 by one second margin portion 212 .
  • the second electrode 32 is not connected to the first edge electrode 310 but is connected to the second edge electrode 320 .
  • the second sub-divided electrode 82 arranged on one side (left side) in the transverse direction S of the dielectric film 2 is not connected to the first end surface electrode 310, but the dielectric
  • the second large split electrode 72 arranged on the other side (right side) of the body film 2 in the transverse direction S is connected to the second edge electrode 320 .
  • the second electrode 32 is separated into at least two or more second sub-divided electrodes 82 by at least one or more second margin portions 212 .
  • the second electrodes 32 are separated into n/2 pieces.
  • the second electrode 32 is separated into two (see FIGS. 4 and 5).
  • the second electrode 32 is separated into two second sub-divided electrodes 82 by one second margin 212 .
  • the second electrode 32 is not connected to the first edge electrode 310 and the second edge electrode 320 .
  • the second sub-divided electrode 82 arranged on one side (left side) in the transverse direction S of the dielectric film 2 is not connected to the first end face electrode 310 and is not connected to the dielectric film 2.
  • the second sub-divided electrode 82 arranged on the other side (right side) of the body film 2 in the transverse direction S is also not connected to the second edge electrode 320 .
  • the second electrode 32 includes a second large split electrode 72
  • the second large split electrode 72 is preferably connected to the edge electrode 30 .
  • the second small electrode group 520 includes a plurality of (two in this embodiment) second small electrodes 521 (see FIGS. 2 and 5). A plurality of second small electrodes 521 are connected by a second fuse 62 .
  • the film capacitor 1 according to the present embodiment also includes a plurality of unit capacitor groups (one unit capacitor group is a portion C surrounded by a dashed line in FIGS. 2 and 5), as in the first to third embodiments.
  • a plurality of unit capacitor groups are arranged in the longitudinal direction L.
  • Each of the plurality of unit capacitor groups is connected to the facet electrode 30 (the first facet electrode 310 and the second facet electrode 320). That is, a plurality of unit capacitor groups are connected in parallel.
  • each unit capacitor group of the present embodiment includes three or more unit capacitors 10 connected in series in the lateral direction S. As shown in FIG.
  • each unit capacitor group includes three or more unit capacitors 10 connected in series in the transverse direction S. As the number of unit capacitors 10 included in each unit capacitor group increases, the voltage applied to each unit capacitor 10 decreases. Therefore, damage to the dielectric film 2 can be easily suppressed.
  • a film capacitor 1 according to a fifth embodiment will be described with reference to the drawings.
  • the same reference numerals as in the first to fourth embodiments may be assigned to the same components as in the first to fourth embodiments, and detailed description thereof may be omitted.
  • the film capacitor 1 according to the present embodiment includes three or more unit capacitors 10 connected in series in the lateral direction S in common with the film capacitor 1 according to the fourth embodiment.
  • the first connection portion 91 and the second connection portion 92 are further present. It is different from the film capacitor 1 according to the fourth embodiment in one point (see FIG. 3).
  • the first connection portion 91 is further present (see FIG. 6). ), which is different from the film capacitor 1 according to the fourth embodiment.
  • One first large split electrode 71 out of at least one or more first large split electrodes 71 is present on one side (left side) in the transverse direction S of the dielectric film 2 (first dielectric film 21). .
  • first dielectric film 21 first dielectric film 21
  • the plurality of first partial electrodes 710 are connected by a first connecting portion 91 present at the left end portion in the lateral direction S. As shown in FIG.
  • Two first large split electrodes 71 out of at least two or more first large split electrodes 71 are arranged on one side (left side) and the other side in the transverse direction S of the dielectric film 2 (first dielectric film 21). (on the right).
  • first dielectric film 21 first dielectric film 21
  • second dielectric film 21 first dielectric film 21
  • a plurality of first partial electrodes 710 of the first large segmented electrode 71 arranged on the left side in the lateral direction S are connected by a first connecting portion 91 present at the left end portion of the dielectric film 2 .
  • the plurality of first partial electrodes 710 of the first large segmented electrode 71 arranged on the right side in the lateral direction S are connected by a first connecting portion 91 present at the right end portion of the dielectric film 2 .
  • ⁇ Second electrode> [When n is an odd number of 3 or more] One second large segmented electrode 72 out of at least one or more second large segmented electrodes 72 is present on the other side (right side) in the transverse direction S of the dielectric film 2 (second dielectric film 22). .
  • n 3
  • the plurality of second partial electrodes 720 are connected by a second connecting portion 92 present at the right end portion in the lateral direction S. As shown in FIG.
  • a film capacitor 1 according to this embodiment also includes a plurality of unit capacitor groups, as in the fourth embodiment.
  • a plurality of unit capacitor groups are arranged in the longitudinal direction L.
  • Each of the plurality of unit capacitor groups is connected to the facet electrode 30 (the first facet electrode 310 and the second facet electrode 320). That is, a plurality of unit capacitor groups are connected in parallel.
  • Each unit capacitor group includes three or more unit capacitors 10 connected in series in the transverse direction S.
  • the plurality of unit capacitor groups consist of the first connecting portion 91 and the second connecting portion 92 are connected by (see FIG. 3).
  • the plurality of unit capacitor groups are connected by the first connecting portion 91. (See Figure 6).

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Abstract

This film capacitor comprises: a dielectric film; a first electrode disposed on a first surface; and a second electrode disposed on a second surface. The film capacitor includes three unit capacitors connected in series in a short side direction. The first electrode is separated into two large segmented electrodes by a first margin part. Each of the two large segmented electrodes is divided into a plurality of partial electrodes by a first short side direction slit part. The second electrode is a small segmented electrode, and end margin parts are located on both sides in the short direction of the small segmented electrode. The small segmented electrode is divided into a plurality of small electrode groups by a second short side direction slit part.

Description

フィルムコンデンサFilm capacitor
　本開示は、一般にフィルムコンデンサに関し、より詳細には電子機器、電気機器、産業機器、及び自動車等に用いられるフィルムコンデンサに関する。 The present disclosure generally relates to film capacitors, and more particularly relates to film capacitors used in electronic equipment, electrical equipment, industrial equipment, automobiles, and the like.
　特許文献１には、フィルムコンデンサが開示されている。このフィルムコンデンサは、コンデンサを２個直列接続した構造を採用している。 Patent Document 1 discloses a film capacitor. This film capacitor employs a structure in which two capacitors are connected in series.
　具体的には、特許文献１のフィルムコンデンサは、２枚のフィルムを重ねて円筒状に巻回した構造のフィルムコンデンサである。 Specifically, the film capacitor of Patent Document 1 is a film capacitor having a structure in which two films are stacked and wound into a cylindrical shape.
　そして、上記２枚のフィルムの一方の片面には、巻回方向と直交するフィルム幅方向に２つに分割され且つ巻回方向に連続する２つの共通電極が蒸着されている。 Then, on one side of each of the two films, two common electrodes which are divided into two in the film width direction orthogonal to the winding direction and which are continuous in the winding direction are vapor-deposited.
　また上記一方のフィルムの他面又は他方のフィルムの片面には、フィルム幅方向に２つに分割されると共に巻回方向に複数に分割された部分電極が蒸着されている。 Also, on the other surface of the one film or one surface of the other film, a partial electrode that is divided into two in the film width direction and divided into a plurality of parts in the winding direction is vapor-deposited.
　また上記分割された部分電極のうち、フィルム幅方向に並ぶ複数組の２つの部分電極同士は、各組別に、この２つの部分電極間に位置する保安機構を介して接続されている。 In addition, among the divided partial electrodes, a plurality of sets of two partial electrodes arranged in the film width direction are connected to each other via a security mechanism positioned between the two partial electrodes for each set.
特開２０１４－０６７７９３号公報JP 2014-067793 A
　しかしながら、特許文献１のフィルムコンデンサでは、絶縁破壊時に急激な電流集中を緩和することができないという問題があった。電流が集中すると、貫通破壊に至るリスクが増大する。 However, the film capacitor of Patent Literature 1 has the problem that it is not possible to alleviate the sudden concentration of current at the time of dielectric breakdown. Concentration of current increases the risk of penetrating breakdown.
　本開示の目的は、絶縁破壊が起こったとしても、貫通破壊に至るリスクを低減することができるフィルムコンデンサを提供することにある。 An object of the present disclosure is to provide a film capacitor that can reduce the risk of through breakdown even if dielectric breakdown occurs.
　本開示の一態様に係るフィルムコンデンサは、第１面と前記第１面の反対側の第２面とを有し、短手方向に対して直交する長手方向に延びる誘電体フィルムと、前記第１面に配置された第１電極と、前記第２面に配置された第２電極と、を備える。 A film capacitor according to an aspect of the present disclosure includes a dielectric film having a first surface and a second surface opposite to the first surface and extending in a longitudinal direction orthogonal to a lateral direction; It comprises a first electrode arranged on one surface and a second electrode arranged on the second surface.
　前記フィルムコンデンサは、前記誘電体フィルムを介して前記第１電極と前記第２電極とが対向することで、前記短手方向に直列に接続された２つの単位コンデンサを含む。 The film capacitor includes two unit capacitors connected in series in the lateral direction by facing the first electrode and the second electrode via the dielectric film.
　前記第１電極は、前記長手方向に延びる第１マージン部により、２つの大分割電極に分離されている。 The first electrode is separated into two large split electrodes by the first margin extending in the longitudinal direction.
　前記２つの大分割電極の各々は、前記短手方向に延びる第１短手方向スリット部により、前記長手方向に並ぶ複数の部分電極に分割されている。 Each of the two large split electrodes is divided into a plurality of partial electrodes aligned in the longitudinal direction by a first lateral direction slit extending in the lateral direction.
　前記第２電極は、小分割電極であり、前記小分割電極の前記短手方向の両側に前記長手方向に延びる端部マージン部が存在する。 The second electrode is a sub-divided electrode, and end margin portions extending in the longitudinal direction are present on both sides of the sub-divided electrode in the lateral direction.
　前記小分割電極は、前記短手方向に延びる第２短手方向スリット部により、前記長手方向に並ぶ複数の小電極群に分割されている。 The sub-divided electrodes are divided into a plurality of sub-electrode groups aligned in the longitudinal direction by second lateral direction slit portions extending in the lateral direction.
　本開示によれば、絶縁破壊が起こったとしても、貫通破壊に至るリスクを低減することができる。 According to the present disclosure, even if dielectric breakdown occurs, the risk of penetrating breakdown can be reduced.
図１は、第１実施形態に係るフィルムコンデンサを示す説明図である。FIG. 1 is an explanatory diagram showing the film capacitor according to the first embodiment. 図２は、第２実施形態に係るフィルムコンデンサを示す説明図である。FIG. 2 is an explanatory diagram showing a film capacitor according to the second embodiment. 図３は、第３実施形態に係るフィルムコンデンサを示す説明図である。FIG. 3 is an explanatory diagram showing a film capacitor according to the third embodiment. 図４は、第４実施形態に係るフィルムコンデンサを示す模式的な断面図である。FIG. 4 is a schematic cross-sectional view showing a film capacitor according to a fourth embodiment. 図５は、同上のフィルムコンデンサを示す説明図である。FIG. 5 is an explanatory diagram showing the film capacitor same as the above. 図６は、第５実施形態に係るフィルムコンデンサを示す説明図である。FIG. 6 is an explanatory diagram showing a film capacitor according to the fifth embodiment. 図７Ａは、短手方向に１つの単位コンデンサを含むフィルムコンデンサを示す模式的な断面図である。図７Ｂは、同上のフィルムコンデンサを示す説明図である。FIG. 7A is a schematic cross-sectional view showing a film capacitor including one unit capacitor in the width direction. FIG. 7B is an explanatory diagram showing the same film capacitor. 図８Ａは、短手方向に直列に接続された２つの単位コンデンサを含むフィルムコンデンサを示す模式的な断面図である。図８Ｂは、同上のフィルムコンデンサを示す説明図である。FIG. 8A is a schematic cross-sectional view showing a film capacitor including two unit capacitors connected in series in the width direction. FIG. 8B is an explanatory diagram showing the same film capacitor. 図９Ａは、短手方向に直列に接続された３つの単位コンデンサを含むフィルムコンデンサを示す模式的な断面図である。図９Ｂは、同上のフィルムコンデンサを示す説明図である。FIG. 9A is a schematic cross-sectional view showing a film capacitor including three unit capacitors connected in series in the width direction. FIG. 9B is an explanatory diagram showing the same film capacitor. 図１０は、フィルムコンデンサの一例を示す概略斜視図である。FIG. 10 is a schematic perspective view showing an example of a film capacitor.
　１．概要
　図１０は、フィルムコンデンサ１の一例を示す。フィルムコンデンサ１は、例えば、円筒状をなしている。フィルムコンデンサ１は、例えば、２枚の細長い誘電体フィルム２（第１誘電体フィルム２１及び第２誘電体フィルム２２）を重ねて巻回することによって形成されている。 1. Outline FIG. 10 shows an example of a film capacitor 1 . The film capacitor 1 has, for example, a cylindrical shape. The film capacitor 1 is formed, for example, by stacking and winding two elongated dielectric films 2 (a first dielectric film 21 and a second dielectric film 22).
　ここで、第１誘電体フィルム２１の片面には第１電極３１が配置されている。第２誘電体フィルム２２の片面には第２電極３２が配置されている。フィルムコンデンサ１において、第１電極３１及び第２電極３２は、誘電体フィルム２を介して対向している。フィルムコンデンサ１の両端には端面電極３０（第１端面電極３１０及び第２端面電極３２０）が形成されている。第１電極３１は、第１端面電極３１０に接続されている。第２電極３２は、第２端面電極３２０に接続されている。第１端面電極３１０及び第２端面電極３２０間に電圧を印加することにより、フィルムコンデンサ１を充電することができる。 Here, the first electrode 31 is arranged on one side of the first dielectric film 21 . A second electrode 32 is arranged on one side of the second dielectric film 22 . In the film capacitor 1 , the first electrode 31 and the second electrode 32 face each other with the dielectric film 2 interposed therebetween. Edge electrodes 30 (a first edge electrode 310 and a second edge electrode 320) are formed at both ends of the film capacitor 1 . The first electrode 31 is connected to the first edge electrode 310 . The second electrode 32 is connected to the second edge electrode 320 . By applying a voltage between the first edge electrode 310 and the second edge electrode 320, the film capacitor 1 can be charged.
　フィルムコンデンサ１は、誘電体フィルム２の短手方向Ｓ（幅方向）に１～３つの単位コンデンサ１０を含み得る（図７Ａ、図８Ａ及び図９Ａ参照）。以下、この点について説明する。なお、短手方向Ｓの一方側を「左側」、他方側を「右側」という場合がある。 The film capacitor 1 can include one to three unit capacitors 10 in the lateral direction S (width direction) of the dielectric film 2 (see FIGS. 7A, 8A and 9A). This point will be described below. In addition, one side of the transversal direction S may be called "left side" and the other side may be called "right side."
　図７Ａに示すフィルムコンデンサ１は、誘電体フィルム２の短手方向Ｓに１つの単位コンデンサ１０を含む。 The film capacitor 1 shown in FIG. 7A includes one unit capacitor 10 in the lateral direction S of the dielectric film 2. In FIG.
　図７Ｂに示すように、第１誘電体フィルム２１の片面の右側端部には第１端部マージン部２４１が配置されている。第１端部マージン部２４１を除く第１誘電体フィルム２１の片面全体には第１電極３１が配置されている。第１電極３１は、第１誘電体フィルム２１の片面の左側端部を含み、この部分で第１端面電極３１０に接続されている（図７Ａ参照）。第１端部マージン部２４１が存在することで、第１電極３１と第２端面電極３２０とは離間している。 As shown in FIG. 7B, a first edge margin portion 241 is arranged on the right edge of one side of the first dielectric film 21 . The first electrode 31 is arranged on the entire one side of the first dielectric film 21 except for the first end margin portion 241 . The first electrode 31 includes the left end portion of one side of the first dielectric film 21 and is connected to the first edge electrode 310 at this portion (see FIG. 7A). The presence of the first edge margin portion 241 separates the first electrode 31 and the second edge electrode 320 from each other.
　一方、第２誘電体フィルム２２の片面の左側端部には第２端部マージン部２４２が配置されている。第２端部マージン部２４２を除く第２誘電体フィルム２２の片面全体には第２電極３２が配置されている。第２電極３２は、第２誘電体フィルム２２の片面の右側端部を含み、この部分で第２端面電極３２０に接続されている（図７Ａ参照）。第２端部マージン部２４２が存在することで、第２電極３２と第１端面電極３１０とは離間している。 On the other hand, a second edge margin portion 242 is arranged at the left edge of one side of the second dielectric film 22 . A second electrode 32 is arranged on the entire one side of the second dielectric film 22 excluding the second end margin portion 242 . The second electrode 32 includes the right edge of one side of the second dielectric film 22 and is connected to the second edge electrode 320 at this portion (see FIG. 7A). The presence of the second end margin portion 242 separates the second electrode 32 from the first end face electrode 310 .
　そして、図７Ａに示すように、誘電体フィルム２（第１誘電体フィルム２１）を介して第１電極３１と第２電極３２とが対向する部分に、１つの単位コンデンサ１０が形成される。 Then, as shown in FIG. 7A, one unit capacitor 10 is formed in a portion where the first electrode 31 and the second electrode 32 face each other with the dielectric film 2 (first dielectric film 21) interposed therebetween.
　また図８Ａに示すフィルムコンデンサ１は、誘電体フィルム２の短手方向Ｓに直列に接続された２つの単位コンデンサ１０を含む。 Also, the film capacitor 1 shown in FIG. 8A includes two unit capacitors 10 connected in series in the transverse direction S of the dielectric film 2 .
　図８Ｂに示すように、第１電極３１は、第１マージン部２１１によって左右両側に分割されている。左側の第１電極３１は、第１誘電体フィルム２１の片面の左側端部を含み、この部分で第１端面電極３１０に接続されている。右側の第１電極３１は、第１誘電体フィルム２１の片面の右側端部を含み、この部分で第２端面電極３２０に接続されている（図８Ａ参照）。 As shown in FIG. 8B, the first electrode 31 is divided into left and right sides by a first margin portion 211 . The left first electrode 31 includes the left end portion of one side of the first dielectric film 21 and is connected to the first edge electrode 310 at this portion. The right first electrode 31 includes the right end portion of one side of the first dielectric film 21 and is connected to the second edge electrode 320 at this portion (see FIG. 8A).
　一方、第２誘電体フィルム２２の片面の左側端部及び右側端部には第２端部マージン部２４２が配置されている。両側の第２端部マージン部２４２の間の全体に第２電極３２が配置されている。第２端部マージン部２４２が両側に存在することで、第２電極３２と、第１端面電極３１０及び第２端面電極３２０とは離間している。 On the other hand, second edge margin portions 242 are arranged at the left edge and right edge of one side of the second dielectric film 22 . The second electrode 32 is arranged entirely between the second end margin portions 242 on both sides. The presence of the second edge margin portions 242 on both sides separates the second electrode 32 from the first edge electrode 310 and the second edge electrode 320 .
　そして、図８Ａに示すように、誘電体フィルム２（第１誘電体フィルム２１）を介して第１電極３１と第２電極３２とが対向する部分に、２つの単位コンデンサ１０が形成される。これらの単位コンデンサ１０は、短手方向Ｓに直列に接続されている。 Then, as shown in FIG. 8A, two unit capacitors 10 are formed in the portion where the first electrode 31 and the second electrode 32 face each other with the dielectric film 2 (first dielectric film 21) interposed therebetween. These unit capacitors 10 are connected in series in the lateral direction S. As shown in FIG.
　したがって、図７Ａ及び図８Ａに示すフィルムコンデンサ１に印加される電圧が同じ場合、図８Ａに示すフィルムコンデンサ１の方が、単位コンデンサ１０に印加される電圧が小さくなることにより、誘電体フィルム２の損傷を抑制しやすくなる。 Therefore, when the voltages applied to the film capacitors 1 shown in FIGS. 7A and 8A are the same, the film capacitor 1 shown in FIG. It becomes easier to suppress the damage of
　また図９Ａに示すフィルムコンデンサ１は、誘電体フィルム２の短手方向Ｓに直列に接続された３つの単位コンデンサ１０を含む。 Also, the film capacitor 1 shown in FIG. 9A includes three unit capacitors 10 connected in series in the transverse direction S of the dielectric film 2 .
　図９Ｂに示すように、第１電極３１は、第１マージン部２１１によって左右両側に分割されている。左側の第１電極３１は、第１誘電体フィルム２１の片面の左側端部を含み、この部分で第１端面電極３１０に接続されている（図９Ａ参照）。第１誘電体フィルム２１の片面の右側端部には第１端部マージン部２４１が配置されている。右側の第１電極３１は、第１マージン部２１１及び第１端部マージン部２４１の間の全体に配置されている。第１端部マージン部２４１が存在することで、右側の第１電極３１と第２端面電極３２０とは離間している。 As shown in FIG. 9B, the first electrode 31 is divided into left and right sides by a first margin portion 211 . The left first electrode 31 includes the left edge of one side of the first dielectric film 21 and is connected to the first edge electrode 310 at this portion (see FIG. 9A). A first edge margin portion 241 is arranged at the right edge of one side of the first dielectric film 21 . The first electrode 31 on the right side is arranged entirely between the first margin portion 211 and the first end margin portion 241 . The presence of the first end margin portion 241 separates the right first electrode 31 and the second end face electrode 320 from each other.
　一方、第２電極３２は、第２マージン部２１２によって左右両側に分割されている。右側の第２電極３２は、第２誘電体フィルム２２の片面の右側端部を含み、この部分で第２端面電極３２０に接続されている（図９Ａ参照）。第２誘電体フィルム２２の片面の左側端部には第２端部マージン部２４２が配置されている。左側の第２電極３２は、第２端部マージン部２４２及び第２マージン部２１２の間の全体に配置されている。第２端部マージン部２４２が存在することで、左側の第２電極３２と第１端面電極３１０とは離間している。 On the other hand, the second electrode 32 is divided into left and right sides by the second margin portion 212 . The right second electrode 32 includes the right edge of one side of the second dielectric film 22 and is connected to the second edge electrode 320 at this portion (see FIG. 9A). A second edge margin portion 242 is arranged at the left edge of one side of the second dielectric film 22 . The left second electrode 32 is disposed entirely between the second end margin portion 242 and the second margin portion 212 . The presence of the second edge margin portion 242 separates the left second electrode 32 from the first edge electrode 310 .
　そして、図９Ａに示すように、誘電体フィルム２（第１誘電体フィルム２１）を介して第１電極３１と第２電極３２とが対向する部分に、３つの単位コンデンサ１０が形成される。これらの単位コンデンサ１０は、短手方向Ｓに直列に接続されている。 Then, as shown in FIG. 9A, three unit capacitors 10 are formed in portions where the first electrode 31 and the second electrode 32 face each other with the dielectric film 2 (first dielectric film 21) interposed therebetween. These unit capacitors 10 are connected in series in the lateral direction S. As shown in FIG.
　したがって、図７Ａ、図８Ａ及び図９Ａに示すフィルムコンデンサ１に印加される電圧が同じ場合、これらのフィルムコンデンサ１の中では、図９Ａに示すフィルムコンデンサ１の単位コンデンサ１０に印加される電圧が最も小さくなることにより、誘電体フィルム２の損傷を更に抑制しやすくなる。 Therefore, when the voltage applied to the film capacitors 1 shown in FIGS. 7A, 8A and 9A is the same, the voltage applied to the unit capacitor 10 of the film capacitor 1 shown in FIG. 9A is By making it the smallest, it becomes easier to suppress damage to the dielectric film 2 .
　本発明者は、複数の単位コンデンサ１０が短手方向Ｓに直列に接続されたフィルムコンデンサ１に更に改良を加えて、以下のようなフィルムコンデンサ１を開発した。 The present inventor further improved the film capacitor 1 in which a plurality of unit capacitors 10 are connected in series in the lateral direction S, and developed the following film capacitor 1.
　すなわち、図１に示すように、第１電極３１は、第１マージン部２１１により、２つの大分割電極７に分離されている。２つの大分割電極７の各々は、第１短手方向スリット部２２１により、複数の部分電極７１０に分割されている。 That is, as shown in FIG. 1 , the first electrode 31 is separated into two large split electrodes 7 by the first margin portion 211 . Each of the two large split electrodes 7 is split into a plurality of partial electrodes 710 by the first transverse direction slit portions 221 .
　一方、第２電極３２は、小分割電極８である。小分割電極８の短手方向Ｓの両側に端部マージン部２４２が存在する。小分割電極８は、第２短手方向スリット部２２２により、複数の小電極群５２０に分割されている。小電極群５２０は、複数の小電極５２１を含む。 On the other hand, the second electrode 32 is the sub-divided electrode 8 . End margin portions 242 are present on both sides of the sub-divided electrode 8 in the lateral direction S. As shown in FIG. The sub-divided electrode 8 is divided into a plurality of sub-electrode groups 520 by the second lateral direction slit portions 222 . Small electrode group 520 includes a plurality of small electrodes 521 .
　そして、左側の大分割電極７と左側の小電極５２１とが誘電体フィルム２を介して対向する部分（図１のＺ１部分）に、１つ目の単位コンデンサ１０が形成される。また右側の大分割電極７と右側の小電極５２１とが誘電体フィルム２を介して対向する部分（図１のＺ２部分）に、２つ目の単位コンデンサ１０が形成される。これらの２つの単位コンデンサ１０は、短手方向Ｓに直列に接続されている。 Then, the first unit capacitor 10 is formed in the portion (Z1 portion in FIG. 1) where the large divided electrode 7 on the left and the small electrode 521 on the left face each other with the dielectric film 2 interposed therebetween. A second unit capacitor 10 is formed in a portion (Z2 portion in FIG. 1) where the right large divided electrode 7 and the right small electrode 521 face each other with the dielectric film 2 interposed therebetween. These two unit capacitors 10 are connected in series in the lateral direction S. As shown in FIG.
　上述のように、第１電極３１の２つの大分割電極７の各々は、複数の部分電極７１０に分割されているとともに、第２電極３２の小分割電極８も、複数の小電極群５２０に分割されているので、第１電極３１及び第２電極３２間のある部分（例えば図１では点Ｐ）で絶縁破壊が起こったとしても、この絶縁破壊した部分へ他の部分（図１では点Ｑ）から電流が流入することを、第１短手方向スリット部２２１及び第２短手方向スリット部２２２により抑制することができる。 As described above, each of the two large split electrodes 7 of the first electrode 31 is split into a plurality of partial electrodes 710, and the small split electrodes 8 of the second electrode 32 are also split into a plurality of small electrode groups 520. Since it is divided, even if a dielectric breakdown occurs in a certain portion (for example, point P in FIG. 1) between the first electrode 31 and the second electrode 32, the other portion (point P in FIG. 1) can be transferred to the portion where the dielectric breakdown occurred. Inflow of current from Q) can be suppressed by the first transverse direction slit portion 221 and the second transverse direction slit portion 222 .
　したがって、本実施形態によれば、絶縁破壊が起こったとしても、貫通破壊に至るリスクを低減することができる。ただし、本実施形態に係るフィルムコンデンサ１は、巻回型でも積層型でもよい。 Therefore, according to this embodiment, even if dielectric breakdown occurs, the risk of penetrating breakdown can be reduced. However, the film capacitor 1 according to this embodiment may be of the wound type or the laminated type.
　なお、本明細書において、「絶縁破壊」とは、誘電体フィルム２に電圧を加えた場合、印加電圧を維持し得なくなる現象を意味する。また「貫通破壊」とは、誘電体フィルム２の表面ではなく、内部を通じて生じる全路破壊を意味する。 In this specification, "dielectric breakdown" means a phenomenon in which when a voltage is applied to the dielectric film 2, the applied voltage cannot be maintained. "Through-hole breakdown" means a full-path breakdown that occurs not through the surface of the dielectric film 2 but through the inside.
　２．詳細
　（１）第１実施形態
　以下、第１実施形態に係るフィルムコンデンサ１について、図面を参照して説明する。 2. Details (1) First Embodiment Hereinafter, a film capacitor 1 according to a first embodiment will be described with reference to the drawings.
　図１に示すように、フィルムコンデンサ１は、誘電体フィルム２と、第１電極３１と、第２電極３２と、を備える。 As shown in FIG. 1, the film capacitor 1 includes a dielectric film 2, a first electrode 31 and a second electrode 32.
　フィルムコンデンサ１は、誘電体フィルム２（本実施形態では第１誘電体フィルム２１）を介して第１電極３１と第２電極３２とが対向することで、短手方向Ｓに直列に接続された２つの単位コンデンサ１０を含む（図８Ａ参照）。 In the film capacitor 1, the first electrode 31 and the second electrode 32 face each other with the dielectric film 2 (in this embodiment, the first dielectric film 21) interposed therebetween, and are connected in series in the lateral direction S. It contains two unit capacitors 10 (see FIG. 8A).
　以下、誘電体フィルム２、第１電極３１、及び第２電極３２について説明する。 The dielectric film 2, the first electrode 31, and the second electrode 32 will be described below.
　＜誘電体フィルム＞
　誘電体フィルム２は、誘電体により構成されたフィルムである。誘電体としては、特に限定されないが、例えば、ポリプロピレン（ＰＰ）及びポリエチレンテレフタレート（ＰＥＴ）等が挙げられる。 <Dielectric film>
The dielectric film 2 is a film made of a dielectric. The dielectric is not particularly limited, but examples thereof include polypropylene (PP) and polyethylene terephthalate (PET).
　誘電体フィルム２は、細長いフィルム状をなす。すなわち、誘電体フィルム２は、短手方向Ｓに対して直交する長手方向Ｌに延びるフィルムである。 The dielectric film 2 has an elongated film shape. That is, the dielectric film 2 is a film extending in the longitudinal direction L orthogonal to the lateral direction S. As shown in FIG.
　誘電体フィルム２は、第１面２０１と、第２面２０２と、を有する（図８Ａ参照）。第１面２０１は、誘電体フィルム２の厚さ方向Ｔの一方側を向く面である。厚さ方向Ｔは、短手方向Ｓ及び長手方向Ｌに直交する方向である。第２面２０２は、第１面２０１の反対側の面である。すなわち、第２面２０２は、誘電体フィルム２の厚さ方向Ｔの他方側を向く面である。 The dielectric film 2 has a first surface 201 and a second surface 202 (see FIG. 8A). The first surface 201 is a surface facing one side in the thickness direction T of the dielectric film 2 . A thickness direction T is a direction orthogonal to the lateral direction S and the longitudinal direction L. As shown in FIG. The second surface 202 is the surface opposite to the first surface 201 . That is, the second surface 202 is a surface facing the other side in the thickness direction T of the dielectric film 2 .
　本実施形態では、誘電体フィルム２は、第１誘電体フィルム２１及び第２誘電体フィルム２２を含む。 In this embodiment, the dielectric film 2 includes a first dielectric film 21 and a second dielectric film 22.
　＜第１電極＞
　第１電極３１は、蒸着電極、金属箔電極、及びめっき電極のいずれでもよい。第１電極３１の材質としては、特に限定されないが、例えば、アルミニウム等が挙げられる。 <First electrode>
The first electrode 31 may be any of a vapor deposition electrode, a metal foil electrode, and a plated electrode. The material of the first electrode 31 is not particularly limited, but examples thereof include aluminum.
　第１電極３１は、誘電体フィルム２（本実施形態では第１誘電体フィルム２１）の第１面２０１に配置されている。 The first electrode 31 is arranged on the first surface 201 of the dielectric film 2 (the first dielectric film 21 in this embodiment).
　第１電極３１は、第１マージン部２１１により、２つの大分割電極７に分離されている。 The first electrode 31 is separated into two large split electrodes 7 by a first margin portion 211 .
　第１マージン部２１１は、第１誘電体フィルム２１の第１面２０１において、第１電極３１が配置されていない部分である。したがって、この部分は、誘電体フィルム２が露出している。第１マージン部２１１は、一定の幅で長手方向Ｌに延びている。 The first margin portion 211 is a portion of the first surface 201 of the first dielectric film 21 where the first electrode 31 is not arranged. Therefore, the dielectric film 2 is exposed at this portion. The first margin portion 211 extends in the longitudinal direction L with a constant width.
　２つの大分割電極７のうちの一方は、短手方向Ｓの一方側（左側）に配置された電極である。２つの大分割電極７のうちの他方は、短手方向Ｓの他方側（右側）に配置された電極である。 One of the two large split electrodes 7 is an electrode arranged on one side (left side) in the transverse direction S. The other of the two large split electrodes 7 is an electrode arranged on the other side (right side) in the transverse direction S. As shown in FIG.
　２つの大分割電極７の各々は、少なくとも１つ以上の第１短手方向スリット部２２１により、複数の部分電極７１０に分割されている。 Each of the two large split electrodes 7 is split into a plurality of partial electrodes 710 by at least one or more first transverse direction slits 221 .
　第１短手方向スリット部２２１は、第１誘電体フィルム２１の第１面２０１において、第１電極３１が配置されていない部分である。したがって、この部分も、第１マージン部２１１と同様に、誘電体フィルム２が露出している。第１短手方向スリット部２２１は、一定の幅で短手方向Ｓに延びている。第１短手方向スリット部２２１は、第１誘電体フィルム２１の短手方向Ｓの一方側（左側）の端部及び他方側（右側）の端部とつながっている。したがって、第１短手方向スリット部２２１は、第１マージン部２１１と交差している。なお、本実施形態では、第１短手方向スリット部２２１の幅は、第１マージン部２１１の幅と同じであるが、本実施形態の効果を損なわない範囲で異なっていてもよい。 The first transverse direction slit portion 221 is a portion of the first surface 201 of the first dielectric film 21 where the first electrode 31 is not arranged. Accordingly, the dielectric film 2 is exposed in this portion as well as in the first margin portion 211 . The first lateral direction slit portion 221 extends in the lateral direction S with a constant width. The first transverse direction slit portion 221 is connected to one (left) end and the other (right) end of the first dielectric film 21 in the transverse direction S. As shown in FIG. Therefore, the first transverse direction slit portion 221 crosses the first margin portion 211 . In addition, in the present embodiment, the width of the first lateral direction slit portion 221 is the same as the width of the first margin portion 211, but may be different within a range that does not impair the effects of the present embodiment.
　複数の部分電極７１０は、長手方向Ｌに並んでいる。本実施形態では、部分電極７１０の形状は、矩形状であるが、特に限定されない。また本実施形態では、複数の部分電極７１０の大きさが同じであるが、本実施形態の効果を損なわない範囲で異なっていてもよい。 The plurality of partial electrodes 710 are arranged in the longitudinal direction L. In this embodiment, the shape of the partial electrode 710 is rectangular, but is not particularly limited. In addition, although the sizes of the plurality of partial electrodes 710 are the same in this embodiment, they may be different as long as the effects of this embodiment are not impaired.
　＜第２電極＞
　第２電極３２も、第１電極３１と同様に、蒸着電極、金属箔電極、及びめっき電極のいずれでもよい。第２電極３２の材質も第１電極３１の材質と同様である。 <Second electrode>
As with the first electrode 31, the second electrode 32 may also be any of a vapor deposition electrode, a metal foil electrode, and a plated electrode. The material of the second electrode 32 is also the same as the material of the first electrode 31 .
　第２電極３２は、誘電体フィルム２（本実施形態では第１誘電体フィルム２１）の第２面２０２に配置されている。換言すれば、本実施形態では、第２電極３２は、第２誘電体フィルム２２の第１面２０１に配置されている。 The second electrode 32 is arranged on the second surface 202 of the dielectric film 2 (the first dielectric film 21 in this embodiment). In other words, the second electrode 32 is arranged on the first surface 201 of the second dielectric film 22 in this embodiment.
　第２電極３２は、小分割電極８である。小分割電極８の短手方向Ｓの両側に端部マージン部２４２が存在する。 The second electrode 32 is the subdivided electrode 8 . End margin portions 242 are present on both sides of the sub-divided electrode 8 in the lateral direction S. As shown in FIG.
　端部マージン部２４２は、第２誘電体フィルム２２の短手方向Ｓの一方側（左側）の端部及び他方側（右側）の端部に存在する。端部マージン部２４２は、第２電極３２が配置されていない部分である。したがって、この部分は、誘電体フィルム２が露出している。端部マージン部２４２は、一定の幅で長手方向Ｌに延びている。端部マージン部２４２が存在することで、第２電極３２（小分割電極８）と、第１端面電極３１０及び第２端面電極３２０とは離間し得る。 The end margin portions 242 are present at one (left) end and the other (right) end in the transverse direction S of the second dielectric film 22 . The end margin portion 242 is a portion where the second electrode 32 is not arranged. Therefore, the dielectric film 2 is exposed at this portion. The end margin portion 242 extends in the longitudinal direction L with a constant width. The existence of the end margin portion 242 allows the second electrode 32 (the sub-divided electrode 8) to be separated from the first end surface electrode 310 and the second end surface electrode 320 .
　さらに小分割電極８は、少なくとも１つ以上の第２短手方向スリット部２２２により、複数の小電極群５２０に分割されている。 Further, the sub-divided electrode 8 is divided into a plurality of sub-electrode groups 520 by at least one or more second lateral direction slits 222 .
　第２短手方向スリット部２２２は、第２誘電体フィルム２２の第１面２０１において、第２電極３２が配置されていない部分である。したがって、この部分も、端部マージン部２４２と同様に、誘電体フィルム２が露出している。第２短手方向スリット部２２２は、一定の幅で短手方向Ｓに延びている。第２短手方向スリット部２２２は、左右両側の端部マージン部２４２とつながっている。なお、本実施形態では、第２短手方向スリット部２２２の幅は、端部マージン部２４２の幅と同じであるが、本実施形態の効果を損なわない範囲で異なっていてもよい。さらに本実施形態では、第２短手方向スリット部２２２の幅は、第１短手方向スリット部２２１の幅と同じであるが、本実施形態の効果を損なわない範囲で異なっていてもよい。 The second lateral direction slit portion 222 is a portion of the first surface 201 of the second dielectric film 22 where the second electrode 32 is not arranged. Accordingly, the dielectric film 2 is exposed in this portion as well as in the edge margin portion 242 . The second transverse direction slit portion 222 extends in the transverse direction S with a constant width. The second lateral direction slit portion 222 is connected to the left and right end margin portions 242 . In addition, in the present embodiment, the width of the second lateral direction slit portion 222 is the same as the width of the end margin portion 242, but may be different within a range that does not impair the effects of the present embodiment. Furthermore, in the present embodiment, the width of the second transverse direction slit portion 222 is the same as the width of the first transverse direction slit portion 221, but may differ within a range that does not impair the effects of the present embodiment.
　複数の小電極群５２０は、長手方向Ｌに並んでいる。小電極群５２０は、複数（本実施形態では２つ）の小電極５２１を含む。 The plurality of small electrode groups 520 are arranged in the longitudinal direction L. The small electrode group 520 includes a plurality of (two in this embodiment) small electrodes 521 .
　複数の小電極５２１は、短手方向Ｓに並んでいる。本実施形態では、小電極５２１の形状は、矩形状であるが、特に限定されない。また本実施形態では、複数の小電極５２１の大きさが同じであるが、本実施形態の効果を損なわない範囲で異なっていてもよい。 The plurality of small electrodes 521 are arranged in the lateral direction S. In this embodiment, the shape of the small electrodes 521 is rectangular, but is not particularly limited. In addition, although the sizes of the plurality of small electrodes 521 are the same in this embodiment, they may be different as long as the effects of this embodiment are not impaired.
　複数の小電極群５２０の各々に含まれる複数の小電極５２１は、ヒューズ６２で接続されている。ヒューズ６２は、過大な電流が流れると溶けて、回路を遮断する部分である。ヒューズ６２は、短手方向Ｓに隣り合う小電極５２１同士を接続している。ヒューズ６２の幅は、小電極５２１の長手方向Ｌの長さよりも短い。 A plurality of small electrodes 521 included in each of the plurality of small electrode groups 520 are connected by fuses 62 . The fuse 62 is a part that melts and cuts off the circuit when an excessive current flows. The fuse 62 connects the small electrodes 521 adjacent to each other in the lateral direction S. As shown in FIG. The width of the fuse 62 is shorter than the length of the small electrode 521 in the longitudinal direction L.
　以上説明した第２電極３２は、誘電体フィルム２（本実施形態では第１誘電体フィルム２１）を介して第１電極３１と対向している。 The second electrode 32 described above faces the first electrode 31 via the dielectric film 2 (the first dielectric film 21 in this embodiment).
　具体的には、第２電極３２（小分割電極８）が、誘電体フィルム２を介して、第１電極３１の左側の大分割電極７と対向する部分（図１のＺ１部分）が存在する。より詳細に言えば、第２電極３２の左側の小電極５２１は、誘電体フィルム２を介して、第１電極３１の左側の部分電極７１０と対向している。この部分に１つ目の単位コンデンサ１０が形成される。 Specifically, there is a portion (Z1 portion in FIG. 1) where the second electrode 32 (the small segmented electrode 8) faces the large segmented electrode 7 on the left side of the first electrode 31 through the dielectric film 2. . More specifically, the left small electrode 521 of the second electrode 32 faces the left partial electrode 710 of the first electrode 31 with the dielectric film 2 interposed therebetween. A first unit capacitor 10 is formed in this portion.
　また第２電極３２（小分割電極８）が、誘電体フィルム２を介して、第１電極３１の右側の大分割電極７と対向する部分（図１のＺ２部分）が存在する。より詳細に言えば、第２電極３２の右側の小電極５２１は、誘電体フィルム２を介して、第１電極３１の右側の部分電極７１０と対向している。この部分に２つ目の単位コンデンサ１０が形成される。 There is also a portion (Z2 portion in FIG. 1) where the second electrode 32 (the small segmented electrode 8) faces the large segmented electrode 7 on the right side of the first electrode 31 with the dielectric film 2 interposed therebetween. More specifically, the small electrode 521 on the right side of the second electrode 32 faces the partial electrode 710 on the right side of the first electrode 31 with the dielectric film 2 interposed therebetween. A second unit capacitor 10 is formed in this portion.
　本実施形態に係るフィルムコンデンサ１は、複数の単位コンデンサ群（図１の一点鎖線で囲まれたＣ部分が１つの単位コンデンサ群）を含む。複数の単位コンデンサ群は、長手方向Ｌに並んでいる。複数の単位コンデンサ群の各々は、端面電極３０（第１端面電極３１０及び第２端面電極３２０）と接続される。つまり、複数の単位コンデンサ群は、並列に接続される。各単位コンデンサ群は、短手方向Ｓに直列に接続された２つの単位コンデンサ１０を含む。 The film capacitor 1 according to the present embodiment includes a plurality of unit capacitor groups (one unit capacitor group is a portion C surrounded by a dashed line in FIG. 1). A plurality of unit capacitor groups are arranged in the longitudinal direction L. Each of the plurality of unit capacitor groups is connected to the facet electrode 30 (the first facet electrode 310 and the second facet electrode 320). That is, a plurality of unit capacitor groups are connected in parallel. Each unit capacitor group includes two unit capacitors 10 connected in series in the transverse direction S. As shown in FIG.
　＜作用効果＞
　例えば、図８に示すように、点Ｐにおいて絶縁破壊が起こった場合、点Ｐの周囲から点Ｐに向かって電流が流入し得る。点Ｐの周囲の一点を点Ｑとすると、点Ｑから点Ｐに向かって直線的な経路で電流が流入し得る。これにより、絶縁破壊から直ちに貫通破壊に至るおそれがある。 <Effect>
For example, as shown in FIG. 8, when a dielectric breakdown occurs at point P, a current can flow from around point P toward point P. In FIG. Assuming that a point around point P is point Q, current can flow from point Q toward point P along a straight path. As a result, dielectric breakdown may lead to penetration breakdown immediately.
　点Ｑから点Ｐへ直線的に電流が流入する理由の１つとして、第１電極３１が長手方向Ｌに延びるベタ状をなす電極であることが挙げられる。 One of the reasons why the current flows linearly from the point Q to the point P is that the first electrode 31 is a solid electrode extending in the longitudinal direction L.
　これに対して、本実施形態では、例えば、図１に示すように、ある部分電極７１０上の点Ｐにおいて絶縁破壊が起こった場合、他の部分電極７１０上の点Ｑから点Ｐに向かって電流が流入しにくい。つまり、電流の集中が緩和される。その理由の１つとして、点Ｐが存在する部分電極７１０と、点Ｑが存在する部分電極７１０とは、第１短手方向スリット部２２１によって隔てられていることが挙げられる。換言すれば、第１電極３１が長手方向Ｌに複数に分割されていることが挙げられる。 On the other hand, in this embodiment, for example, as shown in FIG. 1, when a dielectric breakdown occurs at a point P on a certain partial electrode 710, a It is difficult for current to flow in. That is, current concentration is alleviated. One of the reasons is that the partial electrode 710 where the point P exists and the partial electrode 710 where the point Q exists are separated by the first lateral direction slit portion 221 . In other words, the first electrode 31 is divided in the longitudinal direction L into a plurality of parts.
　このように、本実施形態では、第１電極３１の２つの大分割電極７の各々は、複数の部分電極７１０に分割されているとともに、第２電極３２の小分割電極８も、複数の小電極群５２０に分割されているので、第１電極３１及び第２電極３２間のある部分で絶縁破壊が起こったとしても、この絶縁破壊した部分へ他の部分から電流が流入することを、第１短手方向スリット部２２１及び第２短手方向スリット部２２２により抑制することができる。 Thus, in this embodiment, each of the two large split electrodes 7 of the first electrode 31 is split into a plurality of partial electrodes 710, and the small split electrodes 8 of the second electrode 32 are also split into a plurality of small electrodes. Since it is divided into the electrode group 520, even if a dielectric breakdown occurs in a certain portion between the first electrode 31 and the second electrode 32, it is possible to prevent current from flowing into this dielectrically broken portion from other portions. It can be suppressed by the first lateral direction slit portion 221 and the second lateral direction slit portion 222 .
　したがって、本実施形態によれば、絶縁破壊が起こったとしても、貫通破壊に至るリスクを低減することができる。 Therefore, according to this embodiment, even if dielectric breakdown occurs, the risk of penetrating breakdown can be reduced.
　（２）第２実施形態
　次に、第２実施形態に係るフィルムコンデンサ１について、図面を参照して説明する。第２実施形態では、第１実施形態と同様の構成要素には第１実施形態と同一の符号を付して詳細な説明を省略する場合がある。 (2) Second Embodiment Next, a film capacitor 1 according to a second embodiment will be described with reference to the drawings. In the second embodiment, the same reference numerals as in the first embodiment may be assigned to the same components as in the first embodiment, and detailed description thereof may be omitted.
　図２に示すように、本実施形態に係るフィルムコンデンサ１は、第１電極３１及び第２電極３２が共に長手方向Ｌに複数に分割されている点では、図１に示す第１実施形態に係るフィルムコンデンサ１と共通するが、短手方向Ｓに直列に接続された単位コンデンサ１０の数が３つである点で、第１実施形態に係るフィルムコンデンサ１と相違する。 As shown in FIG. 2, the film capacitor 1 according to this embodiment differs from the first embodiment shown in FIG. Although it is common to the film capacitor 1, it differs from the film capacitor 1 according to the first embodiment in that the number of unit capacitors 10 connected in series in the lateral direction S is three.
　すなわち、本実施形態に係るフィルムコンデンサ１は、誘電体フィルム２（本実施形態では第１誘電体フィルム２１）を介して第１電極３１と第２電極３２とが対向することで、短手方向Ｓに直列に接続された３つの単位コンデンサ１０を含む（図９Ａ参照）。 That is, in the film capacitor 1 according to this embodiment, the first electrode 31 and the second electrode 32 face each other with the dielectric film 2 (in this embodiment, the first dielectric film 21) interposed therebetween. S includes three unit capacitors 10 connected in series (see FIG. 9A).
　以下、第１実施形態との相違点を中心に説明する。 The following description will focus on the differences from the first embodiment.
　＜第１電極＞
　第１電極３１は、第１マージン部２１１により、第１大分割電極７１と、第１小分割電極８１と、に分離されている。 <First electrode>
The first electrode 31 is separated into a first large segmented electrode 71 and a first small segmented electrode 81 by a first margin portion 211 .
　第１大分割電極７１は、第１マージン部２１１と、第１誘電体フィルム２１の短手方向Ｓの一方側（左側）の端部との間に配置されている。 The first large split electrode 71 is arranged between the first margin portion 211 and the end portion of the first dielectric film 21 on one side (left side) in the transverse direction S.
　第１大分割電極７１は、少なくとも１つ以上の第１短手方向スリット部２２１により、複数の第１部分電極７１０に分割されている。第１短手方向スリット部２２１は、第１誘電体フィルム２１の短手方向Ｓの一方側（左側）の端部及び第１マージン部２１１とつながっている。 The first large split electrode 71 is split into a plurality of first partial electrodes 710 by at least one or more first lateral direction slit portions 221 . The first lateral direction slit portion 221 is connected to one side (left side) of the first dielectric film 21 in the lateral direction S and the first margin portion 211 .
　複数の第１部分電極７１０は、長手方向Ｌに並んでいる。複数の第１部分電極７１０の各々の左側端部は、第１端面電極３１０（図２では図示省略）と接続され得る。 The plurality of first partial electrodes 710 are arranged in the longitudinal direction L. The left end of each of the plurality of first partial electrodes 710 can be connected to the first end face electrode 310 (not shown in FIG. 2).
　一方、第１小分割電極８１は、第１マージン部２１１と第１端部マージン部２４１との間に配置されている。 On the other hand, the first sub-divided electrode 81 is arranged between the first margin portion 211 and the first end margin portion 241 .
　ここで、第１端部マージン部２４１は、第１誘電体フィルム２１の短手方向Ｓの他方側（右側）の端部に存在する。第１端部マージン部２４１も、第１マージン部２１１と同様に、第１電極３１が配置されていない部分である。したがって、この部分も、誘電体フィルム２が露出している。第１端部マージン部２４１は、一定の幅で長手方向Ｌに延びている。第１端部マージン部２４１が存在することで、第１小分割電極８１と第２端面電極３２０（図２では図示省略）とは離間し得る。なお、本実施形態では、第１端部マージン部２４１の幅は、第１マージン部２１１の幅と同じであるが、本実施形態の効果を損なわない範囲で異なっていてもよい。 Here, the first end margin portion 241 exists at the end of the first dielectric film 21 on the other side (right side) in the transverse direction S. Similarly to the first margin portion 211, the first end margin portion 241 is also a portion where the first electrode 31 is not arranged. Therefore, the dielectric film 2 is also exposed in this portion. The first end margin portion 241 extends in the longitudinal direction L with a constant width. The presence of the first edge margin portion 241 allows the first sub-divided electrode 81 and the second edge electrode 320 (not shown in FIG. 2) to be separated from each other. In addition, in the present embodiment, the width of the first end margin portion 241 is the same as the width of the first margin portion 211, but may be different within a range that does not impair the effects of the present embodiment.
　さらに第１小分割電極８１は、少なくとも１つ以上の第１短手方向スリット部２２１により、複数の第１小電極群５１０に分割されている。第１短手方向スリット部２２１は、第１マージン部２１１及び第１端部マージン部２４１とつながっている。 Furthermore, the first sub-divided electrode 81 is divided into a plurality of first sub-electrode groups 510 by at least one or more first lateral direction slits 221 . The first lateral direction slit portion 221 is connected to the first margin portion 211 and the first end margin portion 241 .
　複数の第１小電極群５１０は、長手方向Ｌに並んでいる。第１小電極群５１０は、第１部分電極７１０と短手方向Ｓに並んでいる。 The plurality of first small electrode groups 510 are arranged in the longitudinal direction L. The first small electrode group 510 is aligned in the lateral direction S with the first partial electrodes 710 .
　第１小電極群５１０は、複数（本実施形態では２つ）の第１小電極５１１を含む。複数の第１小電極５１１は、短手方向Ｓに並んでいる。本実施形態では、第１小電極５１１の形状は、矩形状であるが、特に限定されない。また本実施形態では、複数の第１小電極５１１の大きさが同じであるが、本実施形態の効果を損なわない範囲で異なっていてもよい。 The first small electrode group 510 includes a plurality of (two in this embodiment) first small electrodes 511 . The plurality of first small electrodes 511 are arranged in the lateral direction S. As shown in FIG. In this embodiment, the shape of the first small electrode 511 is rectangular, but is not particularly limited. Also, in this embodiment, the sizes of the plurality of first small electrodes 511 are the same, but they may be different as long as the effects of this embodiment are not impaired.
　複数の第１小電極群５１０の各々に含まれる複数の第１小電極５１１は、第１ヒューズ６１で接続されている。第１ヒューズ６１は、第１実施形態のヒューズ６２と同様に、過大な電流が流れると溶けて、回路を遮断する部分である。第１ヒューズ６１は、短手方向Ｓに隣り合う第１小電極５１１同士を接続している。第１ヒューズ６１の幅は、第１小電極５１１の長手方向Ｌの長さよりも短い。 A plurality of first small electrodes 511 included in each of the plurality of first small electrode groups 510 are connected by a first fuse 61 . The first fuse 61, like the fuse 62 of the first embodiment, is a portion that melts when an excessive current flows to cut off the circuit. The first fuse 61 connects the first small electrodes 511 adjacent in the lateral direction S to each other. The width of the first fuse 61 is shorter than the length in the longitudinal direction L of the first small electrode 511 .
　＜第２電極＞
　第２電極３２は、第２マージン部２１２により、第２大分割電極７２と、第２小分割電極８２と、に分離されている。 <Second electrode>
The second electrode 32 is separated by a second margin portion 212 into a second large segmented electrode 72 and a second small segmented electrode 82 .
　第２マージン部２１２は、第２誘電体フィルム２２の第１面２０１において、第２電極３２が配置されていない部分である。したがって、この部分は、誘電体フィルム２が露出している。第２マージン部２１２は、一定の幅で長手方向Ｌに延びている。なお、本実施形態では、第２マージン部２１２の幅は、第１マージン部２１１の幅と同じであるが、本実施形態の効果を損なわない範囲で異なっていてもよい。 The second margin portion 212 is a portion of the first surface 201 of the second dielectric film 22 where the second electrode 32 is not arranged. Therefore, the dielectric film 2 is exposed at this portion. The second margin portion 212 extends in the longitudinal direction L with a constant width. In addition, in the present embodiment, the width of the second margin portion 212 is the same as the width of the first margin portion 211, but may be different within a range that does not impair the effects of the present embodiment.
　第２大分割電極７２は、第２マージン部２１２と、第２誘電体フィルム２２の短手方向Ｓの他方側（右側）の端部との間に配置されている。 The second large split electrode 72 is arranged between the second margin portion 212 and the other (right) end of the second dielectric film 22 in the transverse direction S.
　第２大分割電極７２は、第２短手方向スリット部２２２により、複数の第２部分電極７２０に分割されている。第２短手方向スリット部２２２は、第２誘電体フィルム２２の短手方向Ｓの一方側（右側）の端部及び第２マージン部２１２とつながっている。 The second large split electrode 72 is split into a plurality of second partial electrodes 720 by second lateral direction slits 222 . The second lateral direction slit portion 222 is connected to one side (right side) of the second dielectric film 22 in the lateral direction S and the second margin portion 212 .
　複数の第２部分電極７２０は、長手方向Ｌに並んでいる。複数の第２部分電極７２０の各々の右側端部は、第２端面電極３２０（図２では図示省略）と接続され得る。 The plurality of second partial electrodes 720 are arranged in the longitudinal direction L. The right end of each of the plurality of second partial electrodes 720 can be connected to the second end face electrode 320 (not shown in FIG. 2).
　一方、第２小分割電極８２は、第２マージン部２１２と第２端部マージン部２４２との間に配置されている。 On the other hand, the second sub-divided electrode 82 is arranged between the second margin portion 212 and the second end margin portion 242 .
　ここで、第２端部マージン部２４２は、第２誘電体フィルム２２の短手方向Ｓの一方側（左側）の端部に存在する。第２端部マージン部２４２が存在することで、第２小分割電極８２と第１端面電極３１０（図２では図示省略）とは離間し得る。なお、本実施形態では、第２端部マージン部２４２の幅は、第２マージン部２１２の幅と同じであるが、本実施形態の効果を損なわない範囲で異なっていてもよい。 Here, the second edge margin portion 242 exists at one side (left side) edge in the transverse direction S of the second dielectric film 22 . The presence of the second edge margin portion 242 allows the second sub-divided electrode 82 and the first edge electrode 310 (not shown in FIG. 2) to be separated from each other. In addition, in the present embodiment, the width of the second end margin portion 242 is the same as the width of the second margin portion 212, but may be different within a range that does not impair the effects of the present embodiment.
　さらに第２小分割電極８２は、少なくとも１つ以上の第２短手方向スリット部２２２により、複数の第２小電極群５２０に分割されている。 Furthermore, the second sub-divided electrode 82 is divided into a plurality of second sub-electrode groups 520 by at least one or more second lateral direction slits 222 .
　複数の第２小電極群５２０は、長手方向Ｌに並んでいる。第２小電極群５２０は、第２部分電極７２０と短手方向Ｓに並んでいる。 The plurality of second small electrode groups 520 are arranged in the longitudinal direction L. The second small electrode group 520 is aligned in the lateral direction S with the second partial electrodes 720 .
　第２小電極群５２０は、複数（本実施形態では２つ）の第２小電極５２１を含む。複数の第２小電極５２１は、短手方向Ｓに並んでいる。本実施形態では、第２小電極５２１の形状は、矩形状であるが、特に限定されない。また本実施形態では、複数の第２小電極５２１の大きさが同じであるが、本実施形態の効果を損なわない範囲で異なっていてもよい。 The second small electrode group 520 includes a plurality of (two in this embodiment) second small electrodes 521 . The plurality of second small electrodes 521 are arranged in the lateral direction S. As shown in FIG. In this embodiment, the shape of the second small electrode 521 is rectangular, but is not particularly limited. In addition, although the sizes of the plurality of second small electrodes 521 are the same in this embodiment, they may be different as long as the effects of this embodiment are not impaired.
　複数の第２小電極群５２０の各々に含まれる複数の第２小電極５２１は、第２ヒューズ６２で接続されている。第２ヒューズ６２は、第１ヒューズ６１と同様に、過大な電流が流れると溶けて、回路を遮断する部分である。第２ヒューズ６２は、短手方向Ｓに隣り合う第２小電極５２１同士を接続している。第２ヒューズ６２の幅は、第２小電極５２１の長手方向Ｌの長さよりも短い。 A plurality of second small electrodes 521 included in each of the plurality of second small electrode groups 520 are connected by a second fuse 62 . The second fuse 62, like the first fuse 61, is a portion that melts when an excessive current flows to cut off the circuit. The second fuse 62 connects the second small electrodes 521 adjacent to each other in the lateral direction S. As shown in FIG. The width of the second fuse 62 is shorter than the length in the longitudinal direction L of the second small electrode 521 .
　以上説明した第２電極３２は、誘電体フィルム２（本実施形態では第１誘電体フィルム２１）を介して第１電極３１と対向している。 The second electrode 32 described above faces the first electrode 31 via the dielectric film 2 (the first dielectric film 21 in this embodiment).
　具体的には、第２電極３２の第２小分割電極８２が、誘電体フィルム２を介して、第１電極３１の第１大分割電極７１と対向する部分（図１のＺ１部分）が存在する。より詳細に言えば、第２電極３２の左側の第２小電極５２１は、誘電体フィルム２を介して、第１電極３１の第１部分電極７１０と対向している。この部分に１つ目の単位コンデンサ１０が形成される。 Specifically, there is a portion (Z1 portion in FIG. 1) where the second small segmented electrode 82 of the second electrode 32 faces the first large segmented electrode 71 of the first electrode 31 with the dielectric film 2 interposed therebetween. do. More specifically, the second small electrode 521 on the left side of the second electrode 32 faces the first partial electrode 710 of the first electrode 31 with the dielectric film 2 interposed therebetween. A first unit capacitor 10 is formed in this portion.
　また第２電極３２の第２小分割電極８２が、誘電体フィルム２を介して、第１電極３１の第１小分割電極８１と対向する部分（図１のＺ２部分）が存在する。より詳細に言えば、第２電極３２の右側の第２小電極５２１は、誘電体フィルム２を介して、第１電極３１の左側の第１小電極５１１と対向している。この部分に２つ目の単位コンデンサ１０が形成される。 There is also a portion (Z2 portion in FIG. 1) where the second sub-divided electrode 82 of the second electrode 32 faces the first sub-divided electrode 81 of the first electrode 31 with the dielectric film 2 interposed therebetween. More specifically, the second small electrode 521 on the right side of the second electrode 32 faces the first small electrode 511 on the left side of the first electrode 31 with the dielectric film 2 interposed therebetween. A second unit capacitor 10 is formed in this portion.
　また第２電極３２の第２大分割電極７２が、誘電体フィルム２を介して、第１電極３１の第１小分割電極８１と対向する部分（図１のＺ３部分）が存在する。より詳細に言えば、第２電極３２の第２部分電極７２０は、誘電体フィルム２を介して、第１電極３１の右側の第１小電極５１１と対向している。この部分に３つ目の単位コンデンサ１０が形成される。 There is also a portion (Z3 portion in FIG. 1) where the second large segmented electrode 72 of the second electrode 32 faces the first small segmented electrode 81 of the first electrode 31 with the dielectric film 2 interposed therebetween. More specifically, the second partial electrode 720 of the second electrode 32 faces the first small electrode 511 on the right side of the first electrode 31 with the dielectric film 2 interposed therebetween. A third unit capacitor 10 is formed in this portion.
　本実施形態に係るフィルムコンデンサ１も、第１実施形態と同様に、複数の単位コンデンサ群（図２の一点鎖線で囲まれたＣ部分が１つの単位コンデンサ群）を含む。複数の単位コンデンサ群は、長手方向Ｌに並んでいる。複数の単位コンデンサ群の各々は、端面電極３０（第１端面電極３１０及び第２端面電極３２０）と接続される。つまり、複数の単位コンデンサ群は、並列に接続される。ただし、本実施形態の各単位コンデンサ群は、短手方向Ｓに直列に接続された３つの単位コンデンサ１０を含む。 A film capacitor 1 according to the present embodiment also includes a plurality of unit capacitor groups (a portion C surrounded by a dashed line in FIG. 2 is one unit capacitor group) as in the first embodiment. A plurality of unit capacitor groups are arranged in the longitudinal direction L. Each of the plurality of unit capacitor groups is connected to the edge electrode 30 (the first edge electrode 310 and the second edge electrode 320). That is, a plurality of unit capacitor groups are connected in parallel. However, each unit capacitor group in this embodiment includes three unit capacitors 10 connected in series in the lateral direction S. As shown in FIG.
　＜作用効果＞
　本実施形態によれば、第１実施形態と同様の作用効果に加えて、以下のような作用効果も奏する。 <Effect>
According to this embodiment, in addition to the same effects as those of the first embodiment, the following effects are also achieved.
　本実施形態によれば、フィルムコンデンサ１を高電圧で使用しても、全体としての機能を保持することができる。 According to this embodiment, even if the film capacitor 1 is used at a high voltage, the function as a whole can be maintained.
　すなわち、本実施形態に係るフィルムコンデンサ１は、図９Ａに示すフィルムコンデンサ１と同様に、誘電体フィルム２の短手方向Ｓに直列に接続された３つの単位コンデンサ１０を含む。そのため、図７Ａ及び図８Ａに示すフィルムコンデンサ１の第１端面電極３１０及び第２端面電極３２０間に印加される電圧と、本実施形態に係るフィルムコンデンサ１の第１端面電極３１０及び第２端面電極３２０間に印加される電圧とが同じである場合、図７Ａ及び図８Ａに示すフィルムコンデンサ１の単位コンデンサ１０に印加される電圧よりも、本実施形態に係るフィルムコンデンサ１の単位コンデンサ１０に印加される電圧の方が小さくなることにより、誘電体フィルム２の損傷を更に抑制しやすくなる。 That is, the film capacitor 1 according to this embodiment includes three unit capacitors 10 connected in series in the transverse direction S of the dielectric film 2, like the film capacitor 1 shown in FIG. 9A. Therefore, the voltage applied between the first end surface electrode 310 and the second end surface electrode 320 of the film capacitor 1 shown in FIGS. 7A and 8A and the first end surface electrode 310 and the second end surface of the film capacitor 1 according to the present embodiment When the voltage applied between the electrodes 320 is the same, the voltage applied to the unit capacitor 10 of the film capacitor 1 according to the present embodiment is higher than the voltage applied to the unit capacitor 10 of the film capacitor 1 shown in FIGS. 7A and 8A. By reducing the applied voltage, it becomes easier to suppress damage to the dielectric film 2 .
　さらに本実施形態に係るフィルムコンデンサ１では、図２に示すように、複数の第１小電極５１１は、第１ヒューズ６１で接続されているとともに、複数の第２小電極５２１は、第２ヒューズ６２で接続されている。そのため、第１電極３１及び第２電極３２間の一部が短絡しても、第１ヒューズ６１及び第２ヒューズ６２の少なくともいずれかが切断される。 Furthermore, in the film capacitor 1 according to this embodiment, as shown in FIG. 2, the plurality of first small electrodes 511 are connected by the first fuse 61, and the plurality of second small electrodes 521 are connected by the second fuse. 62 are connected. Therefore, even if a part between the first electrode 31 and the second electrode 32 is short-circuited, at least one of the first fuse 61 and the second fuse 62 is disconnected.
　したがって、本実施形態によれば、フィルムコンデンサ１を高電圧で使用しても、全体としての機能を保持することができる。 Therefore, according to this embodiment, even if the film capacitor 1 is used at a high voltage, the function as a whole can be maintained.
　（３）第３実施形態
　次に、第３実施形態に係るフィルムコンデンサ１について、図面を参照して説明する。第３実施形態では、第１～２実施形態と同様の構成要素には第１～２実施形態と同一の符号を付して詳細な説明を省略する場合がある。 (3) Third Embodiment Next, a film capacitor 1 according to a third embodiment will be described with reference to the drawings. In the third embodiment, components similar to those in the first and second embodiments are given the same reference numerals as those in the first and second embodiments, and detailed description thereof may be omitted.
　図３に示すように、本実施形態に係るフィルムコンデンサ１は、短手方向Ｓに直列に接続された３つの単位コンデンサ１０を含む点では、図２に示す第２実施形態に係るフィルムコンデンサ１と共通するが、第１接続部９１及び第２接続部９２が更に存在する点で、第２実施形態に係るフィルムコンデンサ１と相違する。以下、特に第２実施形態との相違点を中心に説明する。 As shown in FIG. 3, the film capacitor 1 according to the present embodiment includes three unit capacitors 10 connected in series in the transverse direction S. , but differs from the film capacitor 1 according to the second embodiment in that a first connection portion 91 and a second connection portion 92 are further present. In the following, the description will focus on the differences from the second embodiment.
　＜第１電極＞
　本実施形態では、第１接続部９１は、誘電体フィルム２（第１誘電体フィルム２１）の短手方向Ｓの一方側（左側）端部に存在する。第１接続部９１は、長手方向Ｌに隣り合う第１部分電極７１０間に存在する。このようにして、複数の第１部分電極７１０は、第１接続部９１で接続されている。 <First electrode>
In this embodiment, the first connection portion 91 is present at one side (left side) end in the transverse direction S of the dielectric film 2 (first dielectric film 21). The first connecting portion 91 exists between the first partial electrodes 710 adjacent to each other in the longitudinal direction L. As shown in FIG. In this manner, the plurality of first partial electrodes 710 are connected by the first connecting portion 91 .
　第１接続部９１は、導電性を有する。そのため、第１接続部９１は、第１電極３１の一部として形成されていてもよい。すなわち、第１接続部９１は、蒸着電極、金属箔電極、及びめっき電極のいずれでもよい。第１接続部９１の材質としては、特に限定されないが、例えば、アルミニウム等が挙げられる。 The first connecting portion 91 has conductivity. Therefore, the first connecting portion 91 may be formed as part of the first electrode 31 . That is, the first connection portion 91 may be any of a vapor deposition electrode, a metal foil electrode, and a plated electrode. The material of the first connecting portion 91 is not particularly limited, but examples thereof include aluminum.
　誘電体フィルム２（第１誘電体フィルム２１）の短手方向Ｓにおいて、第１接続部９１の長さは、第１部分電極７１０の長さよりも短い。したがって、長手方向Ｌに隣り合う第１部分電極７１０間には、第１接続部９１と、第１短手方向スリット部２２１と、が存在する。 The length of the first connecting portion 91 is shorter than the length of the first partial electrode 710 in the lateral direction S of the dielectric film 2 (first dielectric film 21). Therefore, between the first partial electrodes 710 adjacent in the longitudinal direction L, the first connecting portion 91 and the first transverse direction slit portion 221 are present.
　＜第２電極＞
　本実施形態では、第２接続部９２は、誘電体フィルム２（第２誘電体フィルム２２）の短手方向Ｓの他方側（右側）端部に存在する。第２接続部９２は、長手方向Ｌに隣り合う第２部分電極７２０間に存在する。このようにして、複数の第２部分電極７２０は、第２接続部９２で接続されている。 <Second electrode>
In the present embodiment, the second connection portion 92 is present at the other (right) end in the transverse direction S of the dielectric film 2 (second dielectric film 22). The second connection portion 92 exists between the second partial electrodes 720 adjacent to each other in the longitudinal direction L. As shown in FIG. In this manner, the plurality of second partial electrodes 720 are connected by the second connecting portion 92 .
　第２接続部９２は、第１接続部９１と同様に、導電性を有する。そのため、第２接続部９２は、第２電極３２の一部として形成されていてもよい。すなわち、第２接続部９２は第１接続部９１と同様に、蒸着電極、金属箔電極、及びめっき電極のいずれでもよい。第２接続部９２の材質も第１接続部９１の材質と同様である。 The second connection part 92 has conductivity, like the first connection part 91 . Therefore, the second connection portion 92 may be formed as part of the second electrode 32 . That is, like the first connection portion 91, the second connection portion 92 may be any of a vapor deposition electrode, a metal foil electrode, and a plated electrode. The material of the second connection portion 92 is also the same as the material of the first connection portion 91 .
　誘電体フィルム２（第２誘電体フィルム２２）の短手方向Ｓにおいて、第２接続部９２の長さは、第２部分電極７２０の長さよりも短い。したがって、長手方向Ｌに隣り合う第２部分電極７２０間には、第２接続部９２と、第２短手方向スリット部２２２と、が存在する。 The length of the second connecting portion 92 is shorter than the length of the second partial electrode 720 in the lateral direction S of the dielectric film 2 (second dielectric film 22). Therefore, between the second partial electrodes 720 adjacent to each other in the longitudinal direction L, the second connecting portion 92 and the second lateral direction slit portion 222 are present.
　本実施形態に係るフィルムコンデンサ１も、第２実施形態と同様に、複数の単位コンデンサ群を含む。複数の単位コンデンサ群は、長手方向Ｌに並んでいる。複数の単位コンデンサ群の各々は、端面電極３０（第１端面電極３１０及び第２端面電極３２０）と接続される。つまり、複数の単位コンデンサ群は、並列に接続される。各単位コンデンサ群は、短手方向Ｓに直列に接続された３つの単位コンデンサ１０を含む。ただし、本実施形態の複数の単位コンデンサ群は、第１接続部９１及び第２接続部９２によって接続されている。 A film capacitor 1 according to this embodiment also includes a plurality of unit capacitor groups, as in the second embodiment. A plurality of unit capacitor groups are arranged in the longitudinal direction L. Each of the plurality of unit capacitor groups is connected to the facet electrode 30 (the first facet electrode 310 and the second facet electrode 320). That is, a plurality of unit capacitor groups are connected in parallel. Each unit capacitor group includes three unit capacitors 10 connected in series in the transverse direction S. As shown in FIG. However, the plurality of unit capacitor groups in this embodiment are connected by the first connection portion 91 and the second connection portion 92 .
　＜作用効果＞
　本実施形態によれば、第１～２実施形態と同様の作用効果に加えて、以下のような作用効果も奏する。 <Effect>
According to this embodiment, in addition to the same effects as those of the first and second embodiments, the following effects are also achieved.
　本実施形態では、複数の第１部分電極が第１接続部９１で接続されているとともに、複数の第２部分電極が第２接続部９２で接続されている。すなわち、複数の単位コンデンサ群が、第１接続部９１及び第２接続部９２によって接続されている。 In this embodiment, a plurality of first partial electrodes are connected by the first connecting portion 91 and a plurality of second partial electrodes are connected by the second connecting portion 92 . That is, a plurality of unit capacitor groups are connected by the first connection portion 91 and the second connection portion 92 .
　したがって、複数の単位コンデンサ群同士の容量の差を小さくすることができる。また第１大分割電極７１と第１端面電極３１０との接続面積の減少を抑制することができる。また第２大分割電極７２と第２端面電極３２０との接続面積の減少を抑制することができる。 Therefore, it is possible to reduce the difference in capacitance between the plurality of unit capacitor groups. In addition, it is possible to suppress a decrease in the connection area between the first large segmented electrode 71 and the first end surface electrode 310 . Also, it is possible to suppress a decrease in the connection area between the second large segmented electrode 72 and the second end surface electrode 320 .
　さらに本実施形態では、例えば、図３に示すように、ある部分電極７１０上の点Ｐにおいて絶縁破壊が起こった場合、他の部分電極７１０上の点Ｑから点Ｐに向かって電流が直線的に流入しにくい。すなわち、電流は、点Ｑから第１接続部９１を通って点Ｐに至る迂回路を流れやすくなるので、絶縁破壊から貫通破壊に至るまでの時間を稼ぐことができる。したがって、貫通破壊のリスクを低減することができる。 Furthermore, in this embodiment, for example, as shown in FIG. difficult to flow into. That is, the current can easily flow through the detour path from the point Q to the point P through the first connecting portion 91, so that it is possible to gain time from dielectric breakdown to penetration breakdown. Therefore, the risk of penetrating destruction can be reduced.
　（４）第４実施形態
　次に、第４実施形態に係るフィルムコンデンサ１について、図面を参照して説明する。第４実施形態では、第１～３実施形態と同様の構成要素には第１～３実施形態と同一の符号を付して詳細な説明を省略する場合がある。 (4) Fourth Embodiment Next, a film capacitor 1 according to a fourth embodiment will be described with reference to the drawings. In the fourth embodiment, the same reference numerals as in the first to third embodiments may be assigned to the same components as in the first to third embodiments, and detailed description thereof may be omitted.
　本実施形態に係るフィルムコンデンサ１は、短手方向Ｓに直列に接続された３つの単位コンデンサ１０を含む点では、第２～３実施形態に係るフィルムコンデンサ１と共通するが、短手方向Ｓに直列に接続された４つ以上の単位コンデンサ１０を含み得る点で、第１～３実施形態に係るフィルムコンデンサ１と相違する。 The film capacitor 1 according to this embodiment is common to the film capacitors 1 according to the second and third embodiments in that it includes three unit capacitors 10 connected in series in the transverse direction S, but the film capacitor 1 according to the transverse direction S is different from the film capacitors 1 according to the first to third embodiments in that it can include four or more unit capacitors 10 connected in series.
　つまり、本実施形態に係るフィルムコンデンサ１は、短手方向Ｓに直列に接続された単位コンデンサ１０の数を３つ以上に拡張ないし一般化したものである。以下、短手方向Ｓに直列に接続された単位コンデンサ１０の数をｎ（ただしｎは３以上の整数）とする。 That is, the film capacitor 1 according to this embodiment is obtained by expanding or generalizing the number of unit capacitors 10 connected in series in the lateral direction S to three or more. Hereinafter, the number of unit capacitors 10 connected in series in the lateral direction S is assumed to be n (where n is an integer of 3 or more).
　なお、図４及び図５は、ｎ＝４の場合のフィルムコンデンサ１の一例を示す。このフィルムコンデンサ１には、誘電体フィルム２を介して、第１大分割電極７１と第２小分割電極８２とが対向する部分（Ｚ１及びＺ４部分）と、第１小分割電極８１と第２小分割電極８２とが対向する部分（Ｚ２及びＺ３部分）と、が存在する。 Note that FIGS. 4 and 5 show an example of the film capacitor 1 when n=4. The film capacitor 1 includes a portion (Z1 and Z4 portions) where the first large segmented electrode 71 and the second small segmented electrode 82 face each other with the dielectric film 2 interposed therebetween; There are portions (Z2 and Z3 portions) facing the sub-divided electrodes 82 .
　＜誘電体フィルム＞
　本実施形態の誘電体フィルム２は、第１～３実施形態の誘電体フィルム２と同様である。 <Dielectric film>
The dielectric film 2 of this embodiment is the same as the dielectric films 2 of the first to third embodiments.
　＜第１電極＞
　〔ｎが３以上の奇数の場合〕
　第１電極３１は、少なくとも１つ以上の第１マージン部２１１により、少なくとも１つ以上の第１大分割電極７１と、少なくとも１つ以上の第１小分割電極８１と、に分離されている。特に第１電極３１は、（ｎ＋１）／２個に分離される。具体例を挙げると、ｎ＝３の場合、第１電極３１は、２つに分離される（図２参照）。例えば、第１電極３１は、１つの第１マージン部２１１により、１つの第１大分割電極７１と、１つの第１小分割電極８１と、に分離される。 <First electrode>
[When n is an odd number of 3 or more]
The first electrode 31 is separated by at least one or more first margin portions 211 into at least one or more first large segmented electrodes 71 and at least one or more first small segmented electrodes 81 . In particular, the first electrodes 31 are separated into (n+1)/2 pieces. As a specific example, when n=3, the first electrode 31 is separated into two (see FIG. 2). For example, the first electrode 31 is separated into one first large segmented electrode 71 and one first small segmented electrode 81 by one first margin portion 211 .
　さらに第１電極３１は、第１端面電極３１０に接続されるが、第２端面電極３２０には接続されない。具体例を挙げると、ｎ＝３の場合、誘電体フィルム２の短手方向Ｓの一方側（左側）に配置された第１大分割電極７１は、第１端面電極３１０に接続されるが、誘電体フィルム２の短手方向Ｓの他方側（右側）に配置された第１小分割電極８１は、第２端面電極３２０に接続されない。 Furthermore, the first electrode 31 is connected to the first edge electrode 310 but not to the second edge electrode 320 . To give a specific example, when n=3, the first large split electrode 71 arranged on one side (left side) in the short direction S of the dielectric film 2 is connected to the first end surface electrode 310. The first sub-divided electrode 81 arranged on the other side (right side) of the dielectric film 2 in the transverse direction S is not connected to the second end surface electrode 320 .
　〔ｎが４以上の偶数の場合〕
　第１電極３１は、少なくとも２つ以上の第１マージン部２１１により、少なくとも２つ以上の第１大分割電極７１と、少なくとも１つ以上の第１小分割電極８１と、に分離されている。特に第１電極３１は、（ｎ＋２）／２個に分離される。具体例を挙げると、ｎ＝４の場合、第１電極３１は、３つに分離される（図４及び図５参照）。例えば、第１電極３１は、２つの第１マージン部２１１により、２つの第１大分割電極７１と、１つの第１小分割電極８１と、に分離される。 [When n is an even number of 4 or more]
The first electrode 31 is separated by at least two or more first margin portions 211 into at least two or more first large segmented electrodes 71 and at least one or more first small segmented electrodes 81 . In particular, the first electrodes 31 are separated into (n+2)/2 pieces. As a specific example, when n=4, the first electrode 31 is separated into three (see FIGS. 4 and 5). For example, the first electrode 31 is separated into two first large split electrodes 71 and one first small split electrode 81 by two first margin portions 211 .
　さらに第１電極３１は、第１端面電極３１０及び第２端面電極３２０に接続される。具体例を挙げると、ｎ＝４の場合、誘電体フィルム２の短手方向Ｓの一方側（左側）に配置された第１大分割電極７１は、第１端面電極３１０に接続されるとともに、誘電体フィルム２の短手方向Ｓの他方側（右側）に配置された第１大分割電極７１は、第２端面電極３２０に接続される。 Furthermore, the first electrode 31 is connected to the first edge electrode 310 and the second edge electrode 320 . As a specific example, when n=4, the first large segmented electrode 71 arranged on one side (left side) in the short direction S of the dielectric film 2 is connected to the first end surface electrode 310, The first large split electrode 71 arranged on the other side (right side) of the dielectric film 2 in the transverse direction S is connected to the second end surface electrode 320 .
　〔ｎが３以上の整数の場合〕
　第１大分割電極７１は端面電極３０に接続されることが好ましい。 [When n is an integer of 3 or more]
The first large segmented electrode 71 is preferably connected to the end face electrode 30 .
　第１小電極群５１０は、複数（本実施形態では２つ）の第１小電極５１１を含む（図２及び図５参照）。複数の第１小電極５１１は、第１ヒューズ６１で接続されている。 The first small electrode group 510 includes a plurality of (two in this embodiment) first small electrodes 511 (see FIGS. 2 and 5). A plurality of first small electrodes 511 are connected by a first fuse 61 .
　＜第２電極＞
　〔ｎが３以上の奇数の場合〕
　第２電極３２は、少なくとも１つ以上の第２マージン部２１２により、少なくとも１つ以上の第２大分割電極７２と、少なくとも１つ以上の第２小分割電極８２と、に分離されている。特に第２電極３２は、（ｎ＋１）／２個に分離される。具体例を挙げると、ｎ＝３の場合、第２電極３２は、２つに分離される（図２参照）。例えば、第２電極３２は、１つの第２マージン部２１２により、１つの第２大分割電極７２と、１つの第２小分割電極８２と、に分離される。 <Second electrode>
[When n is an odd number of 3 or more]
The second electrode 32 is separated into at least one or more second large segmented electrodes 72 and at least one or more second small segmented electrodes 82 by at least one or more second margin portions 212 . In particular, the second electrodes 32 are separated into (n+1)/2 pieces. As a specific example, when n=3, the second electrode 32 is separated into two (see FIG. 2). For example, the second electrode 32 is separated into one second large segmented electrode 72 and one second small segmented electrode 82 by one second margin portion 212 .
　さらに第２電極３２は、第１端面電極３１０には接続されないが、第２端面電極３２０には接続される。具体例を挙げると、ｎ＝３の場合、誘電体フィルム２の短手方向Ｓの一方側（左側）に配置された第２小分割電極８２は、第１端面電極３１０に接続されないが、誘電体フィルム２の短手方向Ｓの他方側（右側）に配置された第２大分割電極７２は、第２端面電極３２０に接続される。 Furthermore, the second electrode 32 is not connected to the first edge electrode 310 but is connected to the second edge electrode 320 . To give a specific example, when n=3, the second sub-divided electrode 82 arranged on one side (left side) in the transverse direction S of the dielectric film 2 is not connected to the first end surface electrode 310, but the dielectric The second large split electrode 72 arranged on the other side (right side) of the body film 2 in the transverse direction S is connected to the second edge electrode 320 .
　〔ｎが４以上の偶数の場合〕
　第２電極３２は、少なくとも１つ以上の第２マージン部２１２により、少なくとも２つ以上の第２小分割電極８２に分離されている。特に第２電極３２は、ｎ／２個に分離される。具体例を挙げると、ｎ＝４の場合、第２電極３２は、２つに分離される（図４及び図５参照）。例えば、第２電極３２は、１つの第２マージン部２１２により、２つの第２小分割電極８２に分離される。 [When n is an even number of 4 or more]
The second electrode 32 is separated into at least two or more second sub-divided electrodes 82 by at least one or more second margin portions 212 . In particular, the second electrodes 32 are separated into n/2 pieces. As a specific example, when n=4, the second electrode 32 is separated into two (see FIGS. 4 and 5). For example, the second electrode 32 is separated into two second sub-divided electrodes 82 by one second margin 212 .
　さらに第２電極３２は、第１端面電極３１０及び第２端面電極３２０には接続されない。具体例を挙げると、ｎ＝４の場合、誘電体フィルム２の短手方向Ｓの一方側（左側）に配置された第２小分割電極８２は、第１端面電極３１０に接続されないとともに、誘電体フィルム２の短手方向Ｓの他方側（右側）に配置された第２小分割電極８２も、第２端面電極３２０に接続されない。 Furthermore, the second electrode 32 is not connected to the first edge electrode 310 and the second edge electrode 320 . As a specific example, when n=4, the second sub-divided electrode 82 arranged on one side (left side) in the transverse direction S of the dielectric film 2 is not connected to the first end face electrode 310 and is not connected to the dielectric film 2. The second sub-divided electrode 82 arranged on the other side (right side) of the body film 2 in the transverse direction S is also not connected to the second edge electrode 320 .
　〔ｎが３以上の整数の場合〕
　第２電極３２が第２大分割電極７２を含む場合には、第２大分割電極７２は端面電極３０に接続されることが好ましい。 [When n is an integer of 3 or more]
If the second electrode 32 includes a second large split electrode 72 , the second large split electrode 72 is preferably connected to the edge electrode 30 .
　第２小電極群５２０は、複数（本実施形態では２つ）の第２小電極５２１を含む（図２及び図５参照）。複数の第２小電極５２１は、第２ヒューズ６２で接続されている。 The second small electrode group 520 includes a plurality of (two in this embodiment) second small electrodes 521 (see FIGS. 2 and 5). A plurality of second small electrodes 521 are connected by a second fuse 62 .
　本実施形態に係るフィルムコンデンサ１も、第１～３実施形態と同様に、複数の単位コンデンサ群（図２及び図５の一点鎖線で囲まれたＣ部分が１つの単位コンデンサ群）を含む。複数の単位コンデンサ群は、長手方向Ｌに並んでいる。複数の単位コンデンサ群の各々は、端面電極３０（第１端面電極３１０及び第２端面電極３２０）と接続される。つまり、複数の単位コンデンサ群は、並列に接続される。ただし、本実施形態の各単位コンデンサ群は、短手方向Ｓに直列に接続された３つ以上の単位コンデンサ１０を含む。 The film capacitor 1 according to the present embodiment also includes a plurality of unit capacitor groups (one unit capacitor group is a portion C surrounded by a dashed line in FIGS. 2 and 5), as in the first to third embodiments. A plurality of unit capacitor groups are arranged in the longitudinal direction L. Each of the plurality of unit capacitor groups is connected to the facet electrode 30 (the first facet electrode 310 and the second facet electrode 320). That is, a plurality of unit capacitor groups are connected in parallel. However, each unit capacitor group of the present embodiment includes three or more unit capacitors 10 connected in series in the lateral direction S. As shown in FIG.
　＜作用効果＞
　本実施形態によれば、第１～２実施形態と同様の作用効果に加えて、以下のような作用効果も奏する。 <Effect>
According to this embodiment, in addition to the same effects as those of the first and second embodiments, the following effects are also achieved.
　本実施形態では、各単位コンデンサ群が、短手方向Ｓに直列に接続された３つ以上の単位コンデンサ１０を含む。各単位コンデンサ群に含まれる単位コンデンサ１０の数が多くなるほど、各単位コンデンサ１０に印加される電圧が小さくなる。そのため、誘電体フィルム２の損傷を抑制しやすくなる。 In this embodiment, each unit capacitor group includes three or more unit capacitors 10 connected in series in the transverse direction S. As the number of unit capacitors 10 included in each unit capacitor group increases, the voltage applied to each unit capacitor 10 decreases. Therefore, damage to the dielectric film 2 can be easily suppressed.
　したがって、本実施形態によれば、フィルムコンデンサ１を高電圧で使用しても、全体としての機能を保持することができる。 Therefore, according to this embodiment, even if the film capacitor 1 is used at a high voltage, the function as a whole can be maintained.
　（５）第５実施形態
　次に、第５実施形態に係るフィルムコンデンサ１について、図面を参照して説明する。第５実施形態では、第１～４実施形態と同様の構成要素には第１～４実施形態と同一の符号を付して詳細な説明を省略する場合がある。 (5) Fifth Embodiment Next, a film capacitor 1 according to a fifth embodiment will be described with reference to the drawings. In the fifth embodiment, the same reference numerals as in the first to fourth embodiments may be assigned to the same components as in the first to fourth embodiments, and detailed description thereof may be omitted.
　本実施形態に係るフィルムコンデンサ１は、短手方向Ｓに直列に接続された３つ以上の単位コンデンサ１０を含む点では、第４実施形態に係るフィルムコンデンサ１と共通する。 The film capacitor 1 according to the present embodiment includes three or more unit capacitors 10 connected in series in the lateral direction S in common with the film capacitor 1 according to the fourth embodiment.
　本実施形態に係るフィルムコンデンサ１は、短手方向Ｓに直列に接続された単位コンデンサ１０の数が３以上の奇数の場合には、第１接続部９１及び第２接続部９２が更に存在する点（図３参照）で、第４実施形態に係るフィルムコンデンサ１と相違する。 In the film capacitor 1 according to the present embodiment, when the number of unit capacitors 10 connected in series in the lateral direction S is an odd number of 3 or more, the first connection portion 91 and the second connection portion 92 are further present. It is different from the film capacitor 1 according to the fourth embodiment in one point (see FIG. 3).
　また本実施形態に係るフィルムコンデンサ１は、短手方向Ｓに直列に接続された単位コンデンサ１０の数が４以上の偶数の場合には、第１接続部９１が更に存在する点（図６参照）で、第４実施形態に係るフィルムコンデンサ１と相違する。 Further, in the film capacitor 1 according to the present embodiment, when the number of the unit capacitors 10 connected in series in the lateral direction S is an even number of 4 or more, the first connection portion 91 is further present (see FIG. 6). ), which is different from the film capacitor 1 according to the fourth embodiment.
　以下、上記の相違点を中心に説明する。 The following will focus on the above differences.
　＜第１電極＞
　〔ｎが３以上の奇数の場合〕
　少なくとも１つ以上の第１大分割電極７１のうちの１つの第１大分割電極７１は、誘電体フィルム２（第１誘電体フィルム２１）の短手方向Ｓの一方側（左側）に存在する。具体例を挙げると、ｎ＝３の場合、１つの第１大分割電極７１が、短手方向Ｓの左側に存在する（図３参照）。そして、複数の第１部分電極７１０は、短手方向Ｓの左側端部に存在する第１接続部９１で接続されている。 <First electrode>
[When n is an odd number of 3 or more]
One first large split electrode 71 out of at least one or more first large split electrodes 71 is present on one side (left side) in the transverse direction S of the dielectric film 2 (first dielectric film 21). . As a specific example, when n=3, one first large segmented electrode 71 exists on the left side in the lateral direction S (see FIG. 3). The plurality of first partial electrodes 710 are connected by a first connecting portion 91 present at the left end portion in the lateral direction S. As shown in FIG.
　〔ｎが４以上の偶数の場合〕
　少なくとも２つ以上の第１大分割電極７１のうちの２つの第１大分割電極７１は、誘電体フィルム２（第１誘電体フィルム２１）の短手方向Ｓの一方側（左側）及び他方側（右側）に存在する。具体例を挙げると、ｎ＝４の場合、２つの第１大分割電極７１が、短手方向Ｓの左右両側に存在する（図６参照）。そして、短手方向Ｓの左側に配置された第１大分割電極７１の複数の第１部分電極７１０は、誘電体フィルム２の左側端部に存在する第１接続部９１で接続されている。また短手方向Ｓの右側に配置された第１大分割電極７１の複数の第１部分電極７１０は、誘電体フィルム２の右側端部に存在する第１接続部９１で接続されている。 [When n is an even number of 4 or more]
Two first large split electrodes 71 out of at least two or more first large split electrodes 71 are arranged on one side (left side) and the other side in the transverse direction S of the dielectric film 2 (first dielectric film 21). (on the right). To give a specific example, when n=4, the two first large split electrodes 71 are present on both the left and right sides in the transverse direction S (see FIG. 6). A plurality of first partial electrodes 710 of the first large segmented electrode 71 arranged on the left side in the lateral direction S are connected by a first connecting portion 91 present at the left end portion of the dielectric film 2 . Also, the plurality of first partial electrodes 710 of the first large segmented electrode 71 arranged on the right side in the lateral direction S are connected by a first connecting portion 91 present at the right end portion of the dielectric film 2 .
　＜第２電極＞
　〔ｎが３以上の奇数の場合〕
　少なくとも１つ以上の第２大分割電極７２のうちの１つの第２大分割電極７２は、誘電体フィルム２（第２誘電体フィルム２２）の短手方向Ｓの他方側（右側）に存在する。具体例を挙げると、ｎ＝３の場合、１つの第２大分割電極７２が、短手方向Ｓの右側に存在する（図３参照）。そして、複数の第２部分電極７２０は、短手方向Ｓの右側端部に存在する第２接続部９２で接続されている。 <Second electrode>
[When n is an odd number of 3 or more]
One second large segmented electrode 72 out of at least one or more second large segmented electrodes 72 is present on the other side (right side) in the transverse direction S of the dielectric film 2 (second dielectric film 22). . As a specific example, when n=3, one second large segmented electrode 72 exists on the right side in the lateral direction S (see FIG. 3). The plurality of second partial electrodes 720 are connected by a second connecting portion 92 present at the right end portion in the lateral direction S. As shown in FIG.
　〔ｎが４以上の偶数の場合〕
　第２接続部９２が存在しない場合があり得る（図６参照）。 [When n is an even number of 4 or more]
There may be cases where the second connecting portion 92 does not exist (see FIG. 6).
　〔ｎが３以上の整数の場合〕
　本実施形態に係るフィルムコンデンサ１も、第４実施形態と同様に、複数の単位コンデンサ群を含む。複数の単位コンデンサ群は、長手方向Ｌに並んでいる。複数の単位コンデンサ群の各々は、端面電極３０（第１端面電極３１０及び第２端面電極３２０）と接続される。つまり、複数の単位コンデンサ群は、並列に接続される。各単位コンデンサ群は、短手方向Ｓに直列に接続された３つ以上の単位コンデンサ１０を含む。 [When n is an integer of 3 or more]
A film capacitor 1 according to this embodiment also includes a plurality of unit capacitor groups, as in the fourth embodiment. A plurality of unit capacitor groups are arranged in the longitudinal direction L. Each of the plurality of unit capacitor groups is connected to the facet electrode 30 (the first facet electrode 310 and the second facet electrode 320). That is, a plurality of unit capacitor groups are connected in parallel. Each unit capacitor group includes three or more unit capacitors 10 connected in series in the transverse direction S.
　＜作用効果＞
　本実施形態によれば、第４実施形態と同様の作用効果に加えて、以下のような作用効果も奏する。 <Effect>
According to this embodiment, in addition to the same effects as those of the fourth embodiment, the following effects are also achieved.
　本実施形態では、短手方向Ｓに直列に接続された単位コンデンサ１０の数が３つ以上の奇数個の場合には、複数の単位コンデンサ群は、第１接続部９１及び第２接続部９２によって接続されている（図３参照）。 In the present embodiment, when the number of unit capacitors 10 connected in series in the lateral direction S is an odd number of 3 or more, the plurality of unit capacitor groups consist of the first connecting portion 91 and the second connecting portion 92 are connected by (see FIG. 3).
　また本実施形態では、短手方向Ｓに直列に接続された単位コンデンサ１０の数が４つ以上の偶数個の場合には、複数の単位コンデンサ群は、第１接続部９１によって接続されている（図６参照）。 Further, in this embodiment, when the number of unit capacitors 10 connected in series in the lateral direction S is an even number of four or more, the plurality of unit capacitor groups are connected by the first connecting portion 91. (See Figure 6).
　したがって、複数の単位コンデンサ群同士の容量の差を小さくすることができる。また第１大分割電極７１と第１端面電極３１０との接続面積の減少を抑制することができる。また第２大分割電極７２と第２端面電極３２０との接続面積の減少を抑制することができる。 Therefore, it is possible to reduce the difference in capacitance between the plurality of unit capacitor groups. In addition, it is possible to suppress a decrease in the connection area between the first large segmented electrode 71 and the first end surface electrode 310 . Also, it is possible to suppress a decrease in the connection area between the second large segmented electrode 72 and the second end surface electrode 320 .
　さらに本実施形態では、第３実施形態と同様に、絶縁破壊から貫通破壊に至るまでの時間を稼ぐことができる。したがって、貫通破壊のリスクを低減することができる。 Furthermore, in this embodiment, as in the third embodiment, it is possible to gain time from dielectric breakdown to penetration breakdown. Therefore, the risk of penetrating destruction can be reduced.
　１　フィルムコンデンサ
　１０　単位コンデンサ
　２　誘電体フィルム
　２０１　第１面
　２０２　第２面
　２１１　第１マージン部
　２１２　第２マージン部
　２２１　第１短手方向スリット部
　２２２　第２短手方向スリット部
　２４２　第２端部マージン部（端部マージン部）
　３１　第１電極
　３２　第２電極
　５１０　第１小電極群５１０
　５１１　第１小電極
　５２０　第２小電極群（小電極群）
　５２１　第２小電極（小電極）
　６１　第１ヒューズ
　６２　第２ヒューズ（ヒューズ）
　７　大分割電極
　７１　第１大分割電極
　７１０　第１部分電極（部分電極）
　７２　第２大分割電極
　７２０　第２部分電極
　８　小分割電極
　８１　第１小分割電極
　８２　第２小分割電極
　９１　第１接続部
　９２　第２接続部
　Ｓ　短手方向
　Ｌ　長手方向 1 film capacitor 10 unit capacitor 2 dielectric film 201 first surface 202 second surface 211 first margin part 212 second margin part 221 first transverse direction slit part 222 second transverse direction slit part 242 second end margin part (edge margin part)
31 first electrode 32 second electrode 510 first small electrode group 510
511 first small electrode 520 second small electrode group (small electrode group)
521 second small electrode (small electrode)
61 first fuse 62 second fuse (fuse)
7 large segmented electrode 71 first large segmented electrode 710 first partial electrode (partial electrode)
72 Second large segmented electrode 720 Second segmented electrode 8 Small segmented electrode 81 First small segmented electrode 82 Second small segmented electrode 91 First connection portion 92 Second connection portion S Transverse direction L Longitudinal direction

Claims (10)

  1. 　第１面と前記第１面の反対側の第２面とを有し、短手方向に対して直交する長手方向に延びる誘電体フィルムと、
    　前記第１面に配置された第１電極と、
    　前記第２面に配置された第２電極と、を備え、
    　前記誘電体フィルムを介して前記第１電極と前記第２電極とが対向することで、前記短手方向に直列に接続された２つの単位コンデンサを含み、
    　前記第１電極は、前記長手方向に延びる第１マージン部により、２つの大分割電極に分離され、
    　前記２つの大分割電極の各々は、前記短手方向に延びる第１短手方向スリット部により、前記長手方向に並ぶ複数の部分電極に分割され、
    　前記第２電極は、小分割電極であり、前記小分割電極の前記短手方向の両側に前記長手方向に延びる端部マージン部が存在し、
    　前記小分割電極は、前記短手方向に延びる第２短手方向スリット部により、前記長手方向に並ぶ複数の小電極群に分割されている、
    　フィルムコンデンサ。     a dielectric film having a first surface and a second surface opposite to the first surface and extending in a longitudinal direction perpendicular to the transverse direction;
    a first electrode disposed on the first surface;
    a second electrode disposed on the second surface;
    Two unit capacitors connected in series in the lateral direction by the first electrode and the second electrode facing each other with the dielectric film interposed therebetween,
    the first electrode is separated into two large split electrodes by the longitudinally extending first margin,
    each of the two large split electrodes is divided into a plurality of partial electrodes aligned in the longitudinal direction by a first lateral direction slit portion extending in the lateral direction;
    the second electrode is a sub-divided electrode, and end margin portions extending in the longitudinal direction are present on both sides of the sub-divided electrode in the lateral direction;
    The sub-divided electrodes are divided into a plurality of sub-electrode groups aligned in the longitudinal direction by second lateral direction slit portions extending in the lateral direction,
    Film capacitor.
  2. 　前記小電極群は、ヒューズで接続された複数の小電極を含む、
    　請求項１に記載のフィルムコンデンサ。     the group of small electrodes includes a plurality of small electrodes connected by fuses;
    The film capacitor according to claim 1.
  3. 　第１面と前記第１面の反対側の第２面とを有し、短手方向に対して直交する長手方向に延びる誘電体フィルムと、
    　前記第１面に配置された第１電極と、
    　前記第２面に配置された第２電極と、を備え、
    　前記誘電体フィルムを介して前記第１電極と前記第２電極とが対向することで、前記短手方向に直列に接続された３つの単位コンデンサを含み、
    　前記第１電極は、前記長手方向に延びる第１マージン部により、第１大分割電極と、第１小分割電極と、に分離され、
    　前記第１大分割電極は、前記短手方向に延びる第１短手方向スリット部により、前記長手方向に並ぶ複数の第１部分電極に分割され、
    　前記第１小分割電極は、前記第１短手方向スリット部により、前記長手方向に並ぶ複数の第１小電極群に分割され、
    　前記第２電極は、前記長手方向に延びる第２マージン部により、第２大分割電極と、第２小分割電極と、に分離され、
    　前記第２大分割電極は、前記短手方向に延びる第２短手方向スリット部により、前記長手方向に並ぶ複数の第２部分電極に分割され、
    　前記第２小分割電極は、前記第２短手方向スリット部により、前記長手方向に並ぶ複数の第２小電極群に分割されている、
    　フィルムコンデンサ。     a dielectric film having a first surface and a second surface opposite to the first surface and extending in a longitudinal direction perpendicular to the transverse direction;
    a first electrode disposed on the first surface;
    a second electrode disposed on the second surface;
    three unit capacitors connected in series in the lateral direction by facing the first electrode and the second electrode via the dielectric film;
    the first electrode is separated into a first large segmented electrode and a first small segmented electrode by a first margin portion extending in the longitudinal direction;
    the first large segmented electrode is divided into a plurality of first partial electrodes aligned in the longitudinal direction by first lateral direction slit portions extending in the lateral direction;
    The first sub-divided electrodes are divided into a plurality of first sub-electrode groups aligned in the longitudinal direction by the first lateral direction slits,
    the second electrode is separated into a second large segmented electrode and a second small segmented electrode by a second margin portion extending in the longitudinal direction;
    the second large divided electrode is divided into a plurality of second partial electrodes aligned in the longitudinal direction by second transverse direction slit portions extending in the transverse direction;
    The second sub-divided electrodes are divided into a plurality of second sub-electrode groups aligned in the longitudinal direction by the second lateral direction slits,
    Film capacitor.
  4. 　前記第１小電極群は、第１ヒューズで接続された複数の第１小電極を含み、
    　前記第２小電極群は、第２ヒューズで接続された複数の第２小電極を含む、
    　請求項３に記載のフィルムコンデンサ。     The first small electrode group includes a plurality of first small electrodes connected by a first fuse,
    The second group of small electrodes includes a plurality of second small electrodes connected by a second fuse,
    A film capacitor according to claim 3.
  5. 　前記複数の第１部分電極は、前記短手方向の一方側端部に存在する第１接続部で接続され、
    　前記複数の第２部分電極は、前記短手方向の他方側端部に存在する第２接続部で接続されている、
    　請求項３又は４に記載のフィルムコンデンサ。     The plurality of first partial electrodes are connected by a first connection portion present at one end in the width direction,
    The plurality of second partial electrodes are connected by a second connection portion present at the other side end in the short direction,
    The film capacitor according to claim 3 or 4.
  6. 　第１面と前記第１面の反対側の第２面とを有し、短手方向に対して直交する長手方向に延びる誘電体フィルムと、
    　前記第１面に配置された第１電極と、
    　前記第２面に配置された第２電極と、を備え、
    　前記誘電体フィルムを介して前記第１電極と前記第２電極とが対向することで、前記短手方向に直列に接続された３つ以上の奇数個の単位コンデンサを含み、
    　前記第１電極は、前記長手方向に延びる少なくとも１つ以上の第１マージン部により、少なくとも１つ以上の第１大分割電極と、少なくとも１つ以上の第１小分割電極と、に分離され、
    　前記第１大分割電極は、前記短手方向に延びる第１短手方向スリット部により、前記長手方向に並ぶ複数の第１部分電極に分割され、
    　前記第１小分割電極は、前記第１短手方向スリット部により、前記長手方向に並ぶ複数の第１小電極群に分割され、
    　前記第２電極は、前記長手方向に延びる少なくとも１つ以上の第２マージン部により、少なくとも１つ以上の第２大分割電極と、少なくとも１つ以上の第２小分割電極と、に分離され、
    　前記第２大分割電極は、前記短手方向に延びる第２短手方向スリット部により、前記長手方向に並ぶ複数の第２部分電極に分割され、
    　前記第２小分割電極は、前記第２短手方向スリット部により、前記長手方向に並ぶ複数の第２小電極群に分割されている、
    　フィルムコンデンサ。     a dielectric film having a first surface and a second surface opposite to the first surface and extending in a longitudinal direction perpendicular to the transverse direction;
    a first electrode disposed on the first surface;
    a second electrode disposed on the second surface;
    including three or more odd-numbered unit capacitors connected in series in the lateral direction by the first electrode and the second electrode facing each other through the dielectric film;
    the first electrode is separated by at least one or more first margin portions extending in the longitudinal direction into at least one or more first large segmented electrodes and at least one or more first small segmented electrodes;
    the first large segmented electrode is divided into a plurality of first partial electrodes aligned in the longitudinal direction by first lateral direction slit portions extending in the lateral direction;
    The first sub-divided electrodes are divided into a plurality of first sub-electrode groups aligned in the longitudinal direction by the first lateral direction slits,
    the second electrode is separated into at least one or more second large segmented electrodes and at least one or more second small segmented electrodes by at least one or more second margin portions extending in the longitudinal direction;
    the second large divided electrode is divided into a plurality of second partial electrodes aligned in the longitudinal direction by second transverse direction slit portions extending in the transverse direction;
    The second sub-divided electrodes are divided into a plurality of second sub-electrode groups aligned in the longitudinal direction by the second lateral direction slits,
    Film capacitor.
  7. 　前記少なくとも１つ以上の第１大分割電極のうちの１つの第１大分割電極は、前記短手方向の一方側に存在し、
    　前記１つの第１大分割電極における複数の第１部分電極は、前記短手方向の一方側端部に存在する第１接続部で接続され、
    　前記少なくとも１つ以上の第２大分割電極のうちの１つの第２大分割電極は、前記短手方向の他方側に存在し、
    　前記１つの第２大分割電極における複数の第２部分電極は、前記短手方向の他方側端部に存在する第２接続部で接続されている、
    　請求項６に記載のフィルムコンデンサ。     one first large segmented electrode of the at least one or more first large segmented electrodes is present on one side in the lateral direction;
    The plurality of first partial electrodes in the one first large segmented electrode are connected by a first connection portion present at one end in the lateral direction,
    one of the at least one or more second large-segmented electrodes is present on the other side in the transverse direction;
    The plurality of second partial electrodes in the one second large segmented electrode are connected by a second connection portion present at the other side end in the short direction,
    The film capacitor according to claim 6.
  8. 　第１面と前記第１面の反対側の第２面とを有し、短手方向に対して直交する長手方向に延びる誘電体フィルムと、
    　前記第１面に配置された第１電極と、
    　前記第２面に配置された第２電極と、を備え、
    　前記誘電体フィルムを介して前記第１電極と前記第２電極とが対向することで、前記短手方向に直列に接続された４つ以上の偶数個の単位コンデンサを含み、
    　前記第１電極は、前記長手方向に延びる少なくとも２つ以上の第１マージン部により、少なくとも２つ以上の第１大分割電極と、少なくとも１つ以上の第１小分割電極と、に分離され、
    　前記第１大分割電極は、前記短手方向に延びる第１短手方向スリット部により、前記長手方向に並ぶ複数の第１部分電極に分割され、
    　前記第１小分割電極は、前記第１短手方向スリット部により、前記長手方向に並ぶ複数の第１小電極群に分割され、
    　前記第２電極は、前記長手方向に延びる少なくとも１つ以上の第２マージン部により、少なくとも２つ以上の第２小分割電極に分離され、
    　前記第２小分割電極は、前記短手方向に延びる第２短手方向スリット部により、前記長手方向に並ぶ複数の第２小電極群に分割されている、
    　フィルムコンデンサ。     a dielectric film having a first surface and a second surface opposite to the first surface and extending in a longitudinal direction perpendicular to the transverse direction;
    a first electrode disposed on the first surface;
    a second electrode disposed on the second surface;
    including four or more even number of unit capacitors connected in series in the transverse direction by the first electrode and the second electrode facing each other through the dielectric film;
    the first electrode is separated into at least two or more first large segmented electrodes and at least one or more first small segmented electrodes by at least two or more first margin portions extending in the longitudinal direction;
    the first large segmented electrode is divided into a plurality of first partial electrodes aligned in the longitudinal direction by first lateral direction slit portions extending in the lateral direction;
    The first sub-divided electrodes are divided into a plurality of first sub-electrode groups aligned in the longitudinal direction by the first lateral direction slits,
    the second electrode is separated into at least two or more second sub-divided electrodes by at least one or more second margin portions extending in the longitudinal direction;
    The second sub-divided electrodes are divided into a plurality of second sub-electrode groups aligned in the longitudinal direction by second lateral direction slit portions extending in the lateral direction,
    Film capacitor.
  9. 　前記少なくとも２つ以上の第１大分割電極のうちの２つの第１大分割電極は、前記短手方向の一方側及び他方側に存在し、
    　前記２つの第１大分割電極における複数の第１部分電極は、前記短手方向の一方側端部及び他方側端部に存在する第１接続部で接続されている、
    　請求項８に記載のフィルムコンデンサ。     two of the at least two first large-segmented electrodes are present on one side and the other side in the transverse direction;
    The plurality of first partial electrodes in the two first large segmented electrodes are connected by first connection portions present at one side end and the other side end in the width direction,
    The film capacitor according to claim 8.
  10. 　前記第１小電極群は、第１ヒューズで接続された複数の第１小電極を含み、
    　前記第２小電極群は、第２ヒューズで接続された複数の第２小電極を含む、
    　請求項６～９のいずれか１項に記載のフィルムコンデンサ。     The first small electrode group includes a plurality of first small electrodes connected by a first fuse,
    The second group of small electrodes includes a plurality of second small electrodes connected by a second fuse,
    The film capacitor according to any one of claims 6-9.
PCT/JP2022/022001 2021-06-11 2022-05-30 Film capacitor WO2022259900A1 (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0272609A (en) * 1988-09-07 1990-03-12 Marcon Electron Co Ltd Sh capacitor
JPH0357206A (en) * 1989-07-26 1991-03-12 Nichicon Corp Capacitor for energy storage and quick discharge
JPH03104724U (en) * 1990-02-14 1991-10-30
JPH06168844A (en) * 1992-04-06 1994-06-14 Nichicon Corp High-pressure capacitor for power
JPH0757955A (en) * 1993-08-09 1995-03-03 Shizuki Denki Seisakusho:Kk Metallized film capacitor
JPH07240336A (en) * 1994-08-29 1995-09-12 Nichicon Corp High-voltage power capacitor
JP2012191045A (en) * 2011-03-11 2012-10-04 Nichicon Corp High voltage power capacitor element and high voltage power capacitor using the element

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0272609A (en) * 1988-09-07 1990-03-12 Marcon Electron Co Ltd Sh capacitor
JPH0357206A (en) * 1989-07-26 1991-03-12 Nichicon Corp Capacitor for energy storage and quick discharge
JPH03104724U (en) * 1990-02-14 1991-10-30
JPH06168844A (en) * 1992-04-06 1994-06-14 Nichicon Corp High-pressure capacitor for power
JPH0757955A (en) * 1993-08-09 1995-03-03 Shizuki Denki Seisakusho:Kk Metallized film capacitor
JPH07240336A (en) * 1994-08-29 1995-09-12 Nichicon Corp High-voltage power capacitor
JP2012191045A (en) * 2011-03-11 2012-10-04 Nichicon Corp High voltage power capacitor element and high voltage power capacitor using the element

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