CN102326216B - Inductor - Google Patents
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- CN102326216B CN102326216B CN201080008717.0A CN201080008717A CN102326216B CN 102326216 B CN102326216 B CN 102326216B CN 201080008717 A CN201080008717 A CN 201080008717A CN 102326216 B CN102326216 B CN 102326216B
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- 230000004907 flux Effects 0.000 claims abstract description 46
- 230000011218 segmentation Effects 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 6
- 229910000859 α-Fe Inorganic materials 0.000 claims description 4
- 239000011347 resin Substances 0.000 claims description 2
- 229920005989 resin Polymers 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 abstract description 13
- 238000004804 winding Methods 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000000178 monomer Substances 0.000 description 3
- 208000035126 Facies Diseases 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000002051 biphasic effect Effects 0.000 description 2
- 230000005674 electromagnetic induction Effects 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 241000826860 Trapezium Species 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000009702 powder compression Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F3/00—Cores, Yokes, or armatures
- H01F3/10—Composite arrangements of magnetic circuits
- H01F3/14—Constrictions; Gaps, e.g. air-gaps
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
- H01F17/04—Fixed inductances of the signal type with magnetic core
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/02—Adaptations of transformers or inductances for specific applications or functions for non-linear operation
- H01F38/023—Adaptations of transformers or inductances for specific applications or functions for non-linear operation of inductances
- H01F2038/026—Adaptations of transformers or inductances for specific applications or functions for non-linear operation of inductances non-linear inductive arrangements for converters, e.g. with additional windings
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- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
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- Coils Or Transformers For Communication (AREA)
- Coils Of Transformers For General Uses (AREA)
Abstract
A kind of inductor, it has magnetic core (10) and multiple coil (21,22), and magnetic core (10) has: multiple coil (21,22) each multiple coil arms (11b, 11d) be wound around respectively; At least 1 common arm (11c) of flux ring is formed with each coil arm (11b, 11d); With a pair base portion (11a, 12), coil arm (11b, 11d) and common arm (11c) are positioned between a pair base portion (11a, 12).This inductor can obtain good output and can realize small-sized voltage conversion circuit.
Description
Technical field
The present invention relates at middle inductors used such as voltage conversion circuits.
Background technology
As the voltage conversion circuit by size extremely required for the boost in voltage of interchange or direct current, use the translation circuit of interleaving PFC (PowerFactorCorrect power factor correction) mode as described in Japanese Patent Publication 2007-195282 publication.One such as shown in Figure 11 of the translation circuit of the interleaving PFC mode of two-phase AC power.Translation circuit S shown in Figure 11, is input to two inductor L by the alternating current branch from AC power E
1and L
2.Further, by being configured in AC power E and inductor L
1, L
2between diode, at inductor L
1, L
2the sense of current of middle flowing is generally constant (in fig. 11 direction) from left to right.In the following description, by inductor L
1, L
2the terminal (in figure left side) of side, upstream be defined as input, the terminal (in figure right side) of side, downstream is defined as output.
Inductor L
1, L
2output branch into two respectively.The path of the side after branch is via the first output O of diode and translation circuit S
1connect.On the other hand, from inductor L
1, L
2the path of the opposing party of output branch, via MOS transistor M
1, M
2with the second output O of translation circuit S
2connect.In addition, at the first output O
1with the second output O
2between, be provided with electrolytic capacitor.
MOS transistor M
1, M
2grid be connected with controller C.Controller C sends pulse signal to grid off and on, thus, and inductor L
1, L
2output and the second output O of translation circuit S
2connect off and on/disconnect.Controller C makes to MOS transistor M
1send pulse signal phase place with to MOS transistor M
2the phase 180 ° of ground of the pulse signal sent supply.
When the translation circuit S of said structure is connected with AC power E, can from output O
1, O
2obtain the voltage V than AC power E
iNhigher voltage V
oUTdirect current.
During by alternating current by using the translation circuit of single inductor to convert, its output is that electric current and voltage change with chevron, and pulse ripple is more.On the other hand, when using the translation circuit of interleaving PFC mode, due to multiple electric current synthesis of the phase deviation of pulse ripple, therefore, it is possible to obtain the less good electric current of pulse ripple.
Summary of the invention
But, because the translation circuit of existing interleaving PFC mode uses multiple inductor, so there is the problem that circuit becomes large-scale.
The present invention completes to solve the problem.That is, the object of the invention is to, provide and can obtain good output and the inductor that can realize small-sized voltage conversion circuit.
In order to reach above-mentioned purpose, inductor of the present invention has magnetic core and multiple coil, and magnetic core has: each multiple coil arms be wound around respectively of multiple coil; At least 1 common arm of flux ring is formed with each coil arm; With a pair base portion, coil arm and common arm are between a pair base portion.
In said structure, a side of common arm and a pair base portion forms as one, and touches with the opposing party.
Or also can be configured to, common arm has: form as one with a side of a pair base portion first splits arm; And to form as one with the opposing party of base portion second split arm, the first segmentation arm and the second segmentation arm touch mutually.
In addition, the magnetic resistance being preferably configured to the common arm of magneto resistive ratio of coil arm is large.Such as be configured to, coil arm is all separated with any one of a pair base portion, accompanies the clearance part of tabular between coil arm and base portion.In this case, clearance part is such as formed by resin material.In addition, the magnetic resistance that can be configured to the magneto resistive ratio formation base portion of the material forming coil arm and the material of common arm is large.Such as, coil arm is compressed-core, and base portion and common arm are FERRITE CORE.In addition, a side that can be configured to coil arm and a pair base portion forms as one, and is formed with the structure of air gap, replaces the structure of the clearance part accompanying tabular between coil arm and base portion with this between the opposing party and coil arm of base portion.
In addition, the number that can be configured to coil arm is 2, coil arm and common arm, between a pair base portion, configures with forming a line in the mode of common arm between 2 coil arms.Or the number that can be configured to common arm is 2, coil arm and common arm, between a pair base portion, configure with forming a line in the mode of multiple coil arm between 2 common arms.Or can be configured to a pair base portion is polygonal shape, and coil arm is arranged on the position connected each other in the bight of base portion.In this case, coil arm is respectively provided with 1 in all bights of base portion, and common arm is configured in the position connected each other by the central part of base portion.Or, common arm can be configured to and be arranged on the position connected each other the outer edge that coil arm is not set in base portion.In said structure, coil arm to be such as arranged in base portion bight diagonally.
Also can be configured in addition, also have and organize ancillary coil more, each of many group ancillary coils is wrapped on above-mentioned multiple coil arm.
Also structure as described below can be configured in addition: be set as being cancelled out each other by each magnetic flux being arranged in common arm produced of described multiple coil arm.
When inductor of the present invention described above is used for the voltage conversion circuit of interleaving PFC mode, the magnetic flux produced by each coil can be cancelled out each other in common arm.Therefore, it is possible to reduce the size of the magnetic flux of through common arm.Therefore, it is possible to make the sectional area of the sectional area ratio coil arm of common arm fully little.When such inductor is used for the voltage conversion circuit of interleaving PFC mode, compared with using the existing structure of multiple inductor, the volume of inductor and contact area can be suppressed, for less, to realize small-sized voltage conversion circuit.
Accompanying drawing explanation
Fig. 1 is the stereogram of the inductor of the first execution mode of the present invention.
Fig. 2 is the summary lateral view of the inductor of the first execution mode of the present invention.
Fig. 3 is the summary lateral view of another example of the inductor of the first execution mode of the present invention.
Fig. 4 is the stereogram of the inductor of the second execution mode of the present invention.
Fig. 5 is the summary lateral view of the inductor of the 3rd execution mode of the present invention.
Fig. 6 is the stereogram of the inductor of the 4th execution mode of the present invention.
Fig. 7 is the stereogram of the inductor of the 5th execution mode of the present invention.
Fig. 8 is the stereogram of the inductor of the 6th execution mode of the present invention.
Fig. 9 is the stereogram of the magnetic core of the inductor of the 6th execution mode of the present invention.
Figure 10 is the exploded perspective view of the inductor of the 6th execution mode of the present invention.
Figure 11 is the circuit diagram of an example of the voltage conversion circuit of interleaving PFC mode.
Embodiment
Below, accompanying drawing is used to explain for embodiments of the present invention.Fig. 1 represents the stereogram of the inductor of the first execution mode of the present invention.In addition, Fig. 2 is the summary lateral view of the inductor of present embodiment.As shown in Figure 1, the inductor 1 of present embodiment has magnetic core (core) 10, first coil 21 and the second coil 22.
First block 11 and the second block 12 combine and are formed by magnetic core 10.First block 11 stretches out the first almost parallel mutually arm 11b, the second arm 11c, this 3 arms of the 3rd arm 11d and being formed, in E shape from the first magnetic core portion 11a as bar-shaped base portion.In addition, the second block 12 is bar-shaped, i.e. I shape shape.Form the base portion i.e. second magnetic core portion paired with the 1st magnetic core portion 11a.That is, magnetic core 10 is so-called EI type magnetic core.On the first arm 11b that first coil 21 and the second coil 22 are wrapped in the first block 11 respectively and the 3rd arm 11d.In addition, the first coil 21 is connected with lead-in wire 21a, 22a separately and exclusively respectively with the terminal of the downside of the second coil 22, and the terminal of upside is connected with common lead-in wire 23.
In addition, as magnetic core 10, the compressed-core formed by the powder compression molding of the kicker magnet of iron etc. or the laminated magnetic core formed by the steel plate laminations such as silicon steel or FERRITE CORE etc. can be used.In addition, the first block 11 and the second block 12 can be the magnetic core of identical type, or, also can be different types of magnetic core.In addition, by coil 21 and 22 be wound around the first arm 11b and the 3rd arm 11d with central authorities the second arm 11c also can be different types of magnetic core.
In first coil 21 and the second coil 22 of the inductor 1 of above structure during circulating current, as shown in Figure 2, at magnetic core 10, formed based on the magnetic flux B1 of the first coil 21 and magnetic flux B2 based on the second coil 22.Magnetic flux B1 is formed in the first arm 11b and the second arm 11c, and in addition, magnetic flux B2 is formed in the 3rd arm 11d and the second arm 11c.That is, the second arm 11c by magnetic flux B1 and B2 both sides through.
Herein, the direction be wound around due to the first coil 21 is contrary with the direction that the second coil 22 is wound around, and during from lead-in wire 23 to lead-in wire 21a, 22a by electric current, in the second arm 11c, the direction of magnetic flux B1 and magnetic flux B2 becomes contrary each other.Therefore, in the second arm 11c, magnetic flux B1 and magnetic flux B2 cancels out each other, and the size of the magnetic flux of through second arm 11c reduces.Thus the sectional area of the second arm 11c can be the size fully less than the total of the sectional area of the first arm 11b and the 3rd arm 11d.
As mentioned above, in the present embodiment, make the first coil 21 and the second coil 22 have a part (i.e. the second arm 11c) for magnetic core 10, the structure being wrapped in different magnetic cores with the first coil 21 and the second coil 22 is compared, and significantly can reduce volume and the setting area of inductor.Therefore, by the inductor 1 of present embodiment is used for interleaving PFC circuit, small-sized and that pulse ripple is less voltage conversion circuit can be realized.In addition, in the present embodiment, two groups of coils due to inductor are installed in the arm in the outside of magnetic core, and the heat that coil produces can not be gathered in the central portion of magnetic core, can make heat externally loss effectively.
In addition, the inductor 1 of present embodiment, the length of the second arm 11c of central authorities is slightly longer than the length of the first arm 11b and the 3rd arm 11d that are configured in its both sides.Therefore, when the first block 11 and the second block 12 are combined to form magnetic core 10, at the first arm 11b, between the 3rd arm 11d and the second block 12, air gap G is formed
a.This air gap G
aprevent the magnetic saturation at the first arm 11b and the 3rd arm 11d.
In addition, between the second arm 11c and the second block 12 of central authorities, gap (that is, the second arm 11c and the second block 12 touch) is not formed.Therefore, the magnetic resistance from the first arm 11b or the 3rd arm 11d towards the path between the magneto resistive ratio first arm 11b in the path of the second arm 11c and the 3rd arm 11d is fully little.Consequently, the not through 3rd arm 11d of major part of magnetic flux that generates of the first coil 21 but through second arm 11c.Equally, the not through first arm 11b of major part of magnetic flux that generates of the second coil 22 but through second arm 11c.Thus, can avoid, because the magnetic flux of the coil based on a side is to the coil generation electromagnetic induction of the opposing party, making the problem producing noise in the output.
In addition, the inductor 1 of present embodiment, as mentioned above, has 2 groups of coils 21,22.But, the invention is not restricted to said structure.Such as, as shown in Figure 3, also can be on the basis of the first coil 21 and the second coil 22, be respectively arranged with the structure of the first ancillary coil 21 ' and the second ancillary coil 22 ' respectively at the first arm 11b and the 3rd arm 11d.The inductor 1 ' of said structure, carries out the switch of MOS transistor, the translation circuit in the interleaving PFC mode of so-called critical conduction mode action when the size for the electric current led to when the coil midstream detected for boosting is zero (zero hands over (zerocross)).Namely, first ancillary coil 21 ' and the second ancillary coil 22 ' are connected with the pfc controller controlling MOS transistor, pfc controller detect the electric current of circulation in the first coil 21 and the second coil 22 size and based on the switch motion of this testing result control MOS transistor.
In addition, this structure is also useful when 2 systems use the translation circuit of interleaving PFC mode.That is, according to this structure, the translation circuit based on coil 21,22 and the translation circuit based on ancillary coil 21 ', 22 ' can be formed by an inductor.In addition, when by the transformation loop of the inductor 1 ' of this structure for the interleaving PFC mode of 2 systems, in the sense of current that ancillary coil 21 ', 22 ' flows through, be preferably defined as the magnetic flux that makes to produce by flowing through electric current at ancillary coil 21 ' and the magnetic flux that produces by flowing through electric current at ancillary coil 22 ' is cancelled out each other in the second arm 11c.
In the first execution mode of the present invention described above, as shown in Figure 1, the second arm 11c is in roughly prismatic.But, the invention is not restricted to said structure.Such as, the inductor 101 of the second execution mode of the present invention shown in the stereogram of Fig. 4, as shown in Figure 4, depth direction (namely vertical with the orientation of the first coil 121 and the second coil 122 and the axial both sides direction of the first coil 121 and the second arm 111c of the central authorities of the second coil 122 is not configured.By the direction of bottom right to upper left in figure) size of dimension D, roughly the same with the external diameter of the second coil 122 with the first coil 121.Therefore, first magnetic core portion 111a of the first block 111 and the depth direction size of the second block 112, reduce at Width (orientation of the first ~ three arm 111b ~ d) two ends, increase towards Width central authorities (being namely provided with the part of the second arm 111c), near Width central authorities, become maximum D.More specifically, as shown in Figure 4, first magnetic core portion 111a of the first magnetic core 111 and the shape of the second block 112 are roughly hexagonal tabular, be provided with the first arm 111b and 111d of coil 121 and 122, the mode that above-mentioned hexagonal 2 groups of bight 111e and 112a, 111f and 112b diagonally connect to be configured respectively.
In addition, the side 115a of the first arm 111b side of the second arm 111c and the side 115b of the 3rd arm 111d side, becomes the concave surface of the barrel surface shape that the direction of principal axis along coil 121,122 extends.Further, a part for the first coil 121 and the second coil 122 is configured in the recess of side 115a and 115b of the second arm 111c respectively.
As mentioned above, structure according to the present embodiment, can suppress Width (the i.e. orientation of the first coil 121 and the second coil 122 of inductor 101.From figure, lower-left is to the direction of upper right) size.And then structure according to the present embodiment, makes the depth direction size of the second arm 111c as far as possible elongated in the scope of depth direction size not increasing inductor 101.Therefore, according to the present embodiment, can realize making the sectional area of the second arm 111c fully large, while guaranteeing the performance of inductor, suppress the contact area of inductor and the inductor of volume.
In addition, other structures of the inductor 101 of present embodiment, such as, form the second magnetic core portion this point paired with the first magnetic core portion 111a about the second block 112 with monomer (cell cube); Magnetic core 110 this point etc. is formed with (be roughly the same shape with the first magnetic core portion 111a) second block 112 not arranging arm with by the first block 111 of being extruded with the first ~ three arm 111b ~ d from the first magnetic core portion 111a, identical with the first execution mode of the present invention.In addition, the first arm 111b be wound around at coil 121 and 122 and the 3rd arm 111d is formed with air gap G
a, on the other hand, do not form air gap (that is, the second block 112 and the second arm 111c touch) this point at the second arm 111c not arranging coil 121 and 122, also identical with the first execution mode.
In addition, identical with the first execution mode, also can be configured to: in two terminals of the first coil 121 and the second coil 122, the terminal of the side close with the magnetic core portion of a side leads to the common lead-in wire connecing the first coil 121 and the second coil 122 together and is connected, the terminal close with the magnetic core portion of the opposing party is connected with lead-in wire separately and exclusively, and the direction that the direction of the first coil 121 winding and the second coil 122 are wound around is rightabout.In such a configuration, identical with the first execution mode, circulating current between common lead-in wire and lead-in wire separately and exclusively, based on second coil 121 produce magnetic flux and based on second coil 122 produce magnetic flux cancel out each other in the second arm 111c, inductor 101 is the more small inductor of sectional area of the second arm 111c, has the performance equal with 2 inductors.
In first and second execution modes of the present invention described above, what be configured to magnetic core is arranged in 3 arms of row, is provided with the structure of coil, but the invention is not restricted to said structure at two arms in outside.Fig. 5 is the summary lateral view of the inductor of the 3rd execution mode of the present invention.Inductor 201 as shown in Figure 5, magnetic core 210 has the base portion (being included in the first magnetic core portion 211a in the first block 211 of downside and and the second block 212 of the paired upside of the first magnetic core portion 211a) of upper and lower a pair and between this base portion, is arranged in the first arm 211b, the second arm 211c, the 3rd arm 211d and the 4th arm 211e of row, on the second arm 211c that the first coil 221 and the second coil 222 are wrapped in inner side and the 3rd arm 211d.In the structure shown here, the first arm 211b in all through outside of magnetic flux B11 and B12 generated by the first coil 221 and the second coil 222 and the 4th arm 211e.Thus the first arm 211b in outside and the 4th arm 211e plays a role as the common arm used by the first coil 221 and the second coil 222 both sides.
As shown in Figure 5, in the inductor 201 of present embodiment, identical with the first execution mode, the first coil 221 is connected with common lead-in wire 223 with a side (in figure upside) of two terminals of the second coil 222, and the opposing party is connected with lead-in wire 221a and 222a separately and exclusively.In addition, identical with the first execution mode, the direction rightabout each other that the first coil 221 and the second coil 222 are wound around.Therefore, common lead-in wire 223 and separately and exclusively flow through electric current between lead-in wire 221a, 222a when, in the first arm 211b and the 4th arm 211e, become rightabout based on the magnetic flux B11 of the first coil 221 generation with based on the magnetic flux B12 of the second coil 222 generation, cancel out each other.Therefore, the size of the magnetic flux of through first arm 211b and the 4th arm 211e becomes less.Thus the sectional area of the first arm 211b and the 4th arm 211e can be the size fully less than the sectional area of the second arm 211c, the 3rd arm 211d.
In addition, in the inductor 201 of present embodiment, first magnetic core portion 211a of the first arm 211b ~ the 4th arm 211e and the first block 211 forms as one, in addition, at the second arm 211c be wound around by coil 221 and 222 be formed with air gap G between the 3rd arm 211d and the second block 212
a, on the other hand, do not form air gap (the first arm 211b and the 4th arm 211e and the second block 212 touch) not arranging between the first arm 211b of coil 221 and 222 and the 4th arm 211e and the second block 212.
In structure described above, the arm arrangement of magnetic core configures in a row, but the invention is not restricted to this structure.Fig. 6 is the stereogram of the inductor of the 4th execution mode of the present invention.Inductor 301 shown in Fig. 6, magnetic core 310 has a pair base portion (the first magnetic core portion 311a in the first block 311 on the downside of being included in and the second block 312 of upside, it forms the second magnetic core portion paired with the first magnetic core portion 311a with monomer (cell cube)) configured up and down.In addition, the first magnetic core portion 311a and the second block 312 all form the tabular of general triangular.Be provided with the first arm 311b, the second arm 311c and the 3rd arm 311d of three columns in the position be connected to each other in the respective bight of the first magnetic core portion 311a and the second block 312, the first coil 321 and the second coil 322 are wrapped on the first arm 311b and the second arm 311c.In the structure shown here, all through 3rd arm 311d of magnetic flux produced by the first coil 321 and the second coil 322.
In addition, identical with the first execution mode, can also be configured to: in two terminals of the first coil 321 and the second coil 322, lead to close to the terminal of side the common lead-in wire connecing the first coil 321 and the second coil 322 with the magnetic core portion of a side to be together connected, the terminal close with the magnetic core portion of the opposing party is connected with lead-in wire separately and exclusively, and the direction that the direction of the first coil 321 winding and the second coil 322 are wound around is rightabout.In such a configuration, identical with the first execution mode, circulating current between common lead-in wire and lead-in wire separately and exclusively, based on first coil 321 produce magnetic flux and based on second coil 322 produce magnetic flux cancel out each other in the 3rd arm 311d, inductor 301 is the more small inductor of sectional area of the 3rd arm 311d, has the performance equal with 2 inductors.
In addition, in the inductor 301 of present embodiment, the first arm 311b ~ the 3rd arm 311d and the first magnetic core portion 311a forms as one, and in addition, is wound with between the first arm 311b of coil 321 and 322 and the second arm 311c and the second block 312 and is formed with air gap G
a, on the other hand, do not form air gap (the 3rd arm 311d and the second block 312 touch) at the 3rd arm 311d not arranging coil 321 and 322.
The inductor of the first ~ four execution mode of the present invention described above, is applicable to the interleaving PFC circuit that making shown in Figure 11 is transfused to the biphasic or bipolar type of the phase 180 ° of the pulse of the grid of multiple MOS transistor.But inductor of the present invention also can be applicable to the interleaving PFC circuit beyond biphasic or bipolar type.The inductor of the 5th execution mode of the present invention below illustrated, be applicable to the interleaving PFC circuit of four facies patterns, the phase place that the interleaving PFC circuit of this four facies pattern is set to make to be imported into the pulse be arranged in each MOS transistor of 4 groups of coils respectively differs 90 °.
Fig. 7 is the stereogram of the inductor of the 5th execution mode of the present invention.The magnetic core 410 of the inductor 401 of present embodiment, has a pair base portion (be included in the first magnetic core portion 411a in the first block 411 of downside and with the second block 412 of the paired upside of monomer (cell cube) and the first magnetic core portion 411a) configured up and down.First magnetic core portion 411a and the second block 412 are formed as the tabular of roughly quadrangle, in the position that the respective bight of this base portion is connected each other, be provided with the first arm 411b of 4 columns, the second arm 411c, the 3rd arm 411d and the 4th arm 411e, and be configured in the 5th arm 411f of rectangular central authorities.In addition, the first arm 411b ~ the 5th arm 411f and the first magnetic core portion 411a forms as one.In addition, the inductor 401 of present embodiment has the first coil 421, second coil 422, tertiary coil 423 and the 4th coil 424, and these coils are wrapped on the first arm 411b, the second arm 411c, the 3rd arm 411d, the 4th arm 411e respectively.
In the first coil 421, second coil 422 of the inductor 401 of above structure, tertiary coil 423 and the 4th coil 424 during circulating current, at magnetic core 410, formed respectively by each magnetic flux produced of the first coil the 421 ~ four coil 424.The all through 5th arm 411f of these magnetic fluxs.
The direction of the first coil the 421 ~ four coil 424 winding of the inductor 401 of present embodiment, is arranged in the mode making the magnetic flux in the 5th arm 411f produced by each coil cancel out each other.Specifically, can be configured to: in two terminals of the first coil the 421 ~ four coil 424, the terminal of the side close with the magnetic core portion of a side leads to the common lead-in wire connecing the first coil the 421 ~ four coil 424 together and is connected, the terminal close with the magnetic core portion of the opposing party is connected with lead-in wire separately and exclusively, and the direction that the direction that is wound around of the first coil 421 and tertiary coil 423 and the second coil 422 and the 4th coil 424 are wound around is rightabout.In such a configuration, identical with the first execution mode, circulating current between common lead-in wire and lead-in wire separately and exclusively, the magnetic flux produced by the first coil the 421 ~ four coil 424 is cancelled out each other in the 5th arm 411f.Therefore, the size of the magnetic flux of through 5th arm 411f becomes less.Thus the sectional area of the 5th arm 411f is the size fully less than the total of the sectional area of the first arm 411b ~ the 4th arm 411e.
As mentioned above, in the present embodiment, a part for magnetic core 410 is had (namely at the first coil the 421 ~ four coil 424, be the 5th arm 411f in this embodiment), compared with the structure being wrapped in different magnetic cores with each coil, significantly can reduce volume and the setting area of inductor.Therefore, by using the inductor 401 of present embodiment in interleaving PFC circuit, small-sized and that pulse ripple is less voltage conversion circuit can be realized.In addition, in the present embodiment, because 4 groups of coils of inductor are installed on the arm in the outside of magnetic core, so the heat that coil produces can not be gathered in the central portion of magnetic core, heat externally loss effectively can be made.
In addition, in the inductor 401 of present embodiment, at the first arm 411b ~ be formed with air gap G between the 4th arm 411e and the second block 412
a.This air gap G
aprevent the magnetic saturation in the first arm 411b ~ the 4th arm 411e.
In addition, between the 5th arm 411f and the second block 412 of central authorities, air gap G is not formed
a(that is, the 5th arm 411f and the second block 412 touch).Therefore, the magnetic resistance in the path between magneto resistive ratio first arm 411b ~ the 4th arm 411f in the path between the 5th arm 411f and other arms is fully little.Consequently, the through 5th arm 411f of major part of the magnetic flux produced by the first coil the 421 ~ four coil 424.Thus, the magnetic flux by being produced by certain coil can be avoided other coil generation electromagnetic induction to be produced in the output to the problem of noise.
In addition, in the present embodiment, first arm 411b ~ the 4th arm 411e is configured in the position will be connected each other as rectangular first magnetic core portion 411 with each bight of the second block 412, but the invention is not restricted to said structure, such as, the position configuration coil arm connected each other in the bight in other polygonal magnetic core portions such as rhombus, right-angled trapezium can also be configured to.
In first ~ five execution mode of the present invention described above, the arm that magnetic core is provided with coil and (that is, having flux ring with the above-mentioned all arms the being provided with coil) arm not arranging coil form as one.But, the invention is not restricted to said structure.In the inductor of the 6th execution mode of the present invention below illustrated, the arm being provided with coil is separated with other arms.
Fig. 8 represents the stereogram of the inductor of present embodiment.In addition, Fig. 9 is the stereogram of the magnetic core of the inductor of present embodiment.In addition, Figure 10 is the exploded perspective view of the inductor of present embodiment.As shown in Figure 8, the inductor 501 of present embodiment has magnetic core 510 and the first coil 521 and the second coil 522.In addition, in figs. 8 to 10, the first coil 521 and the second coil 522 represented by dashed line.
As shown in Figure 9, the magnetic core 510 of the inductor 501 of present embodiment, has first block 511 and second block 512 of the first magnetic core portion 511a and the second magnetic core portion 512a possessing roughly hexagonal tabular.In addition, magnetic core 510 has the first arm 513, second arm 514, the 3rd arm 515 and the 4th arm 516.First arm 513 configures with the mode that hexagonal 2 bights diagonally of the second magnetic core portion 512a are connected each other according to by the first magnetic core portion 511a with the 4th arm 516, and the first coil 521 and the second coil 522 are configured in the first arm 513 and the 4th arm 516 around.In addition, as shown in figs, the first coil 521 and the second coil 522 are arranged on the first arm 513 and the 4th arm 516 around respectively by bobbin (bobbin) 531 and 532.
First arm 513 and the 4th arm 516 are all the columniform parts be separated with the second block 512 with the first block 511.In addition, as shown in Figure 9 and Figure 10, at the two ends of the first arm 513 and the 4th arm 516, resinous plectane and clearance part G are installed
p, the first arm 513 does not directly contact with the second block 512 with the first block 511 with the 4th arm 516.
On the other hand, the second arm 514 is divided into segmentation arm 514a and 514b two parts.Segmentation arm 514a and the first magnetic core portion 511a of one side form as one, and in addition, segmentation arm 514b and the second magnetic core portion 512a of the opposing party form as one.Similarly, the 3rd arm 515 is divided into segmentation arm 515a and 515b two parts (Figure 10).Segmentation arm 515a and the first magnetic core portion 511a of one side form as one, and in addition, segmentation arm 515b and the second magnetic core portion 512a of the opposing party form as one.Like this, form the first block 511 by the first magnetic core portion 511a, segmentation arm 514a and 515a, on the other hand, form the second block 512 by the second magnetic core portion 512a, segmentation arm 514b and 515b.In addition, as shown in Figure 8 and Figure 9, during assembling inductor 501, between the first block 511 and the second block 512, receive bobbin 531 and 532, segmentation arm 514a and 514b touches in the space between bobbin 531 and 532 mutually.Equally, during assembling inductor 501, segmentation arm 515a and 515b touches (not illustrating) in the space between bobbin 531 and 532 mutually.
Like this, at the first arm 513 and the 4th arm 516 and arrange clearance part G between the first block 511 and the second block 512
p, on the other hand, do not form gap at the second arm 514 be connected with the second block 512 by the first block 511 and the 3rd arm 515.Therefore, magneto resistive ratio second arm 514 of the first arm 513 and the 4th arm 516 and the magnetic resistance of the 3rd arm 515 large.Particularly, in the present embodiment, the first arm 513 and the 4th arm 516 are compressed-core, and the first block 511 and the second block 512 are formed by FERRITE CORE on the other hand.Therefore, magneto resistive ratio second arm 514 of the first arm 513 and the 4th arm 516 and the magnetic resistance of the 3rd arm 515 larger.Consequently, the magnetic saturation at the first arm 513 and the 4th arm 516 is prevented.In addition, because the magnetic resistance of the first arm 513 and the 4th arm 516 is larger, therefore the magnetic flux produced at the first arm 513 by the first coil 521 is not towards the 4th arm 516, the magnetic flux produced at the 4th arm 516 by the second coil 522 is not also towards the first arm 513, and these magnetic fluxs major parts are towards the second arm 514 and the 3rd arm 515.
In addition, identical with other execution modes, can be configured to: in two terminals of the first coil 521 and the second coil 522, the terminal of the side close with the magnetic core portion of a side leads to the common lead-in wire connecing the first coil 521 and the second coil 522 together and is connected, the terminal close with the magnetic core portion of the opposing party is connected with lead-in wire separately and exclusively, and the direction that the direction of the first coil 521 winding and the second coil 522 are wound around is rightabout.In such a configuration, circulating current between common lead-in wire and lead-in wire separately and exclusively, the magnetic flux produced by the first coil 521 and the magnetic flux produced by the second coil 522 are cancelled out each other in the second arm 514 and the 3rd arm 515, inductor 501 is formed as the more small inductor of sectional area of the second arm 514 and the 3rd arm 515, and has the performance equal with 2 inductors.
In addition, the inductor 501 of present embodiment is identical with the second execution mode (Fig. 4), and as shown in Figure 9, the face close to coil 521 and coil 522 of the second arm 514 and the 3rd arm 515, is formed as the concave surface of the outer peripheral face along each coil.Consequently, the second arm 514 and the 3rd arm 515 of enough sectional areas can be obtained, and the interval of the first coil 521 and the second coil 522 can be shortened, identical with the second execution mode, the size of the Width (that is, the orientation of the first coil 521 and the second coil 522) of inductor 501 can be suppressed.
Be more than embodiments of the present invention.In addition, the present invention is not limited only to the structure of above-mentioned first ~ six execution mode, by appropriately combined for the structure of the first ~ six execution mode and inductor that is that obtain is also contained in the present invention.Such as, be configured in the inductor of the first ~ five execution mode, the magnetic core portion of the arm and a side that are provided with coil forms as one, and, between the magnetic core portion of the opposing party, be provided with air gap G
astructure, and replace this structure, as described in the 6th execution mode, be provided with resinous clearance part G being provided with between the arm of coil and the magnetic core portion of both sides
pinductor be also contained in the present invention.Can also be configured to, in the inductor of the first ~ five execution mode, the common arm not arranging coil has each a pair segmentation arm being arranged on the first block and the second block, and segmentation arm touches the common arm of formation each other.
Equally, identical with the first ~ five execution mode in the inductor 501 of the 6th execution mode, the first arm 513 and the 4th arm 516 and the first block 511 form as one, and are formed with air gap G between the second block 512
astructure be also contained in the present invention.In addition, can also be configured in the inductor 501 of the 6th execution mode, entirety and first block 511 of the second arm 514 and the 3rd arm 515 form as one, and the second arm 514 and the 3rd arm 515 and the second magnetic core 512 touch.
In addition, the first ancillary coil 21 ' shown in Fig. 3 and the second ancillary coil 22 ' can also be applied to the second ~ six execution mode.That is, in the second ~ six execution mode, the structure of each additional ancillary coil of the arm being provided with coil is also contained in the present invention.Such as, when being applied to the 5th execution mode, ancillary coil can be set at each of the first arm 411b, the second arm 411c, the 3rd arm 411d and the 4th arm 411e, when being applied to the 6th execution mode, ancillary coil can be set at each of bobbin 531 and 532, in addition, can also be configured to add further the bobbin being wound with ancillary coil, be arranged on the around respective of the first arm 513 and the 4th arm 516.
Industrial applicability
When inductor of the present invention described above is used for the voltage conversion circuit of interleaving PFC mode, the magnetic flux produced by each coil can be cancelled out each other in common arm.Therefore, it is possible to reduce the size of the magnetic flux of through common arm.Thus the sectional area of the sectional area ratio coil arm of common arm can be made fully little.When such inductor is used for the voltage conversion circuit of interleaving PFC mode, compared with using the existing structure of multiple inductor, the volume of inductor and contact area can be suppressed, for less, realize small-sized voltage conversion circuit, therefore have industrial applicability.
Claims (16)
1. an inductor, it has magnetic core and multiple coil, it is characterized in that:
Described inductor is used for interleaving PFC circuit,
Described magnetic core has: each multiple coil arms be wound around respectively of described multiple coil; At least 1 common arm of flux ring is formed with coil arm described in each; With a pair base portion,
Described coil arm and described common arm between described a pair base portion,
Air gap or clearance part is formed between a side and described multiple coil arm of described a pair base portion,
Be set as being cancelled out each other by each magnetic flux being arranged in described common arm produced of described multiple coil arm,
The depth direction size of described a pair base portion, reduce at Width two ends, towards Width, central authorities increase, maximum is become near Width central authorities, described depth direction is the direction vertical with the orientation of described multiple coil and axial both sides, described Width is the orientation of described coil arm and described common arm
The shape of described a pair base portion is roughly hexagonal tabular, is provided with the described coil arm of coil, the mode that described hexagonal 2 groups of bights diagonally connect to be configured respectively.
2. inductor as claimed in claim 1, is characterized in that:
One side of described common arm and described a pair base portion forms as one, and touches with the opposing party of this base portion.
3. inductor as claimed in claim 1, is characterized in that:
Described common arm has: form as one with a side of described a pair base portion first splits arm; And to form as one with the opposing party of this base portion second split arm,
Described first segmentation arm and the second segmentation arm touch mutually.
4. inductor as claimed in claim 1, is characterized in that:
Described in the magneto resistive ratio of described coil arm, the magnetic resistance of common arm is large.
5. inductor as claimed in claim 4, is characterized in that:
Described coil arm is all separated with any one of described a pair base portion, accompanies the clearance part of tabular between described coil arm and this base portion.
6. inductor as claimed in claim 5, is characterized in that:
Described clearance part is formed by resin material.
7. inductor as claimed in claim 4, is characterized in that:
The magnetic resistance that the magneto resistive ratio forming the material of described coil arm forms the material of described base portion and described common arm is large.
8. inductor as claimed in claim 7, is characterized in that:
Described coil arm is compressed-core, and described base portion and described common arm are FERRITE CORE.
9. inductor as claimed in claim 4, is characterized in that:
One side of described coil arm and described a pair base portion forms as one, between the opposing party and this coil arm of this base portion, be formed with air gap.
10. inductor as claimed in claim 1, is characterized in that:
The number of described coil arm is 2,
Described coil arm and described common arm, between described a pair base portion, configure in the mode of described common arm between described 2 coil arms with forming a line.
11. inductors as claimed in claim 1, is characterized in that:
The number of described common arm is 2,
Described coil arm and described common arm, between described a pair base portion, configure in the mode of described multiple coil arm between described 2 common arms with forming a line.
12. inductors as claimed in claim 1, is characterized in that:
Described a pair base portion is polygonal shape,
Described coil arm is arranged on the position connected each other in the bight of described base portion.
13. inductors as claimed in claim 12, is characterized in that:
Described coil arm is respectively provided with 1 in all bights of described base portion,
Described common arm is configured in the position connected each other by the central part of described base portion.
14. inductors as claimed in claim 12, is characterized in that:
Described common arm is arranged on the position connected each other the outer edge not arranging described coil arm in described base portion.
15. inductors as claimed in claim 12, is characterized in that:
Described coil arm to be arranged in described base portion bight diagonally.
16. inductors as claimed in claim 1, is characterized in that:
Also have and organize ancillary coil more, each of described many group ancillary coils is wrapped on described multiple coil arm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201080008717.0A CN102326216B (en) | 2009-07-31 | 2010-07-19 | Inductor |
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
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| CN2009101609656A CN101989485A (en) | 2009-07-31 | 2009-07-31 | Inductor |
| CN200910160965.6 | 2009-07-31 | ||
| CN2009101609656 | 2009-07-31 | ||
| PCT/CN2010/001082 WO2011011966A1 (en) | 2009-07-31 | 2010-07-19 | Inductor |
| CN201080008717.0A CN102326216B (en) | 2009-07-31 | 2010-07-19 | Inductor |
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| Publication Number | Publication Date |
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| CN102326216A CN102326216A (en) | 2012-01-18 |
| CN102326216B true CN102326216B (en) | 2016-03-16 |
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| CN201080008717.0A Active CN102326216B (en) | 2009-07-31 | 2010-07-19 | Inductor |
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| EP (1) | EP2461334B8 (en) |
| JP (1) | JP5784601B2 (en) |
| KR (1) | KR101760382B1 (en) |
| CN (2) | CN101989485A (en) |
| IN (1) | IN2012DN01755A (en) |
| WO (1) | WO2011011966A1 (en) |
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| CN108022716A (en) * | 2016-10-31 | 2018-05-11 | 株式会社田村制作所 | Inductor |
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| CN104021920B (en) * | 2014-05-27 | 2016-09-28 | 华为技术有限公司 | Coupling inductance and power inverter |
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| US10763028B2 (en) | 2015-04-10 | 2020-09-01 | Delta Electronics, Inc. | Magnetic component and magnetic core of the same |
| TWI557759B (en) | 2015-04-10 | 2016-11-11 | 台達電子工業股份有限公司 | Integrated inductor and integrated inductor magnetic core of the same |
| JP2017139397A (en) * | 2016-02-05 | 2017-08-10 | スミダコーポレーション株式会社 | Magnetic component |
| JP6697682B2 (en) * | 2016-08-17 | 2020-05-27 | 住友電気工業株式会社 | Magnetic core, coil component, circuit board, and power supply device |
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Also Published As
| Publication number | Publication date |
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| JP5784601B2 (en) | 2015-09-24 |
| CN102326216A (en) | 2012-01-18 |
| CN101989485A (en) | 2011-03-23 |
| EP2461334B1 (en) | 2014-06-18 |
| EP2461334A4 (en) | 2013-01-09 |
| IN2012DN01755A (en) | 2015-06-05 |
| EP2461334A1 (en) | 2012-06-06 |
| JP2013501346A (en) | 2013-01-10 |
| KR20120066010A (en) | 2012-06-21 |
| KR101760382B1 (en) | 2017-07-21 |
| WO2011011966A1 (en) | 2011-02-03 |
| EP2461334B8 (en) | 2014-09-17 |
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