WO2022145390A1 - トランス装置 - Google Patents
トランス装置 Download PDFInfo
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- WO2022145390A1 WO2022145390A1 PCT/JP2021/048328 JP2021048328W WO2022145390A1 WO 2022145390 A1 WO2022145390 A1 WO 2022145390A1 JP 2021048328 W JP2021048328 W JP 2021048328W WO 2022145390 A1 WO2022145390 A1 WO 2022145390A1
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- Prior art keywords
- core
- transformer
- core portion
- cooling device
- face
- Prior art date
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- 238000001816 cooling Methods 0.000 claims abstract description 89
- 238000004804 winding Methods 0.000 claims abstract description 25
- 230000008859 change Effects 0.000 description 14
- 239000000853 adhesive Substances 0.000 description 10
- 230000001070 adhesive effect Effects 0.000 description 10
- 239000003990 capacitor Substances 0.000 description 8
- 238000005336 cracking Methods 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 7
- 230000004048 modification Effects 0.000 description 7
- 238000012986 modification Methods 0.000 description 7
- 238000009499 grossing Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000005284 excitation Effects 0.000 description 4
- 239000000945 filler Substances 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
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Classifications
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- 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
- H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
- H01F27/263—Fastening parts of the core together
-
- 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
- H01F27/08—Cooling; Ventilating
-
- 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
- H01F27/08—Cooling; Ventilating
- H01F27/22—Cooling by heat conduction through solid or powdered fillings
-
- 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
- H01F30/00—Fixed transformers not covered by group H01F19/00
- H01F30/06—Fixed transformers not covered by group H01F19/00 characterised by the structure
- H01F30/10—Single-phase transformers
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
Definitions
- the present disclosure relates to a transformer device used in a power conversion device, for example, a DC-DC converter.
- Patent Document 1 discloses a transformer combined with an E-type core.
- Patent Document 2 discloses, in an outer iron type transformer, a transformer in which an inner leg is separated from the center and a heat sink is interposed between the inner legs.
- Patent Document 3 discloses a transformer capable of efficiently dissipating heat of the core.
- An object of the present disclosure is to provide a transformer device having a desired leakage inductance and capable of avoiding core cracking even when a temperature change occurs.
- the transformer device includes a primary winding, a secondary winding, and a first core and a second core arranged so as to insert the primary winding and the secondary winding and face each other.
- a transformer with a core and A cooling device for cooling the transformer is provided.
- the first core includes a first core portion and a second core portion divided by a predetermined dividing surface from each other.
- the first core portion and the second core portion of the first core are arranged so as to face each other through a gap.
- the first core and the cooling device are arranged so as to face each other. It is characterized by that.
- the transformer device According to the transformer device according to the present disclosure, it has a desired leakage inductance, core cracking can be avoided even when a temperature change occurs, and the reliability of the transformer device can be improved.
- FIG. 3 It is a block diagram which shows the structural example of the vehicle-mounted charging apparatus 101 which concerns on embodiment of this disclosure. It is a circuit diagram which shows the structural example of the LLC resonance type DC-DC converter 105 of FIG. It is a perspective view which shows the appearance of the transformer 206 of FIG. 3 is a vertical cross-sectional view showing a cross section of the line AA ′ of FIG. 3 and showing a connection direction of the core when the transformer 206 is fixed with the adhesive 401. It is a vertical cross-sectional view which enlarges and displays the distortion which occurs in the core when the temperature difference occurs between the cores of the transformer which concerns on the prior arts.
- FIG. 1 is a block diagram showing a configuration example of an in-vehicle charging device 101 according to an embodiment of the present disclosure.
- the in-vehicle charging device 101 of FIG. 1 converts the AC power from the commercial AC power supply 102 into DC power and outputs it to the rechargeable battery 106, and insulates the AC power before and after the conversion by the transformer 206 built in the DC-DC converter 105. It is characterized by.
- the in-vehicle charging device 101 is an example of a charging device or a power supply device, and the rechargeable battery 106 is an example of a load or the like.
- the in-vehicle charging device 101 includes a rectifying and smoothing circuit 103, a power factor improving circuit (PFC circuit) 104, and a DC-DC converter 105.
- PFC circuit power factor improving circuit
- DC-DC converter 105 converts the input DC voltage into a DC output voltage corresponding to the battery voltage of the rechargeable battery 106 in the subsequent stage.
- FIG. 2 is a circuit diagram showing a configuration example of the DC-DC converter 105 of FIG.
- an LLC resonance type DC-DC converter 105 widely used for a high-efficiency power supply such as an industrial switching power supply, an in-vehicle charging device, and a power converter is used.
- the LLC resonance type DC-DC converter 105 includes input terminals T1 and T2 and output terminals T3 and T4.
- the LLC resonance type DC-DC converter 105 includes an inverter circuit 201, a resonance capacitor 209, a transformer 206, a rectifier circuit 210, a smoothing capacitor 211, and a control circuit 220 between the input terminal and the output terminal. It is composed of.
- the control circuit 220 generates gate signals Sg1 to Sg4 that control the operation of the inverter circuit 201.
- the inverter circuit 201 is configured by connecting, for example, N-channel MOS transistors 202 to 205, which are switching elements, in a bridge format.
- the inverter circuit 201 converts a DC voltage into an AC voltage by turning on or off the MOS transistors 202 to 205 according to the gate signals Sg1 to Sg4.
- the transformer 206 includes a leakage inductance 207, an excitation inductance 208 of the primary winding, and an inductance 212 of the secondary winding.
- Synchronized signals are input to the gate signal Sg1 and the gate signal Sg4. Similarly, a synchronized signal is input to the gate signal Sg2 and the gate signal Sg3. As the gate signals Sg2 and Sg3, signals inverted with respect to the gate signals Sg1 and Sg4 are input.
- the MOS transistor 202 and the MOS transistor 205 are turned on or off in synchronization according to the gate signal Sg1 and the gate signal Sg4.
- the MOS transistors 203 and 204 are turned on or off in synchronization according to the gate signal Sg2 and the gate signal Sg3.
- the MOS transistors 202 and 205 and the MOS transistors 203 and 204 are inverted and controlled. That is, at the same time that the MOS transistors 202 and 205 are turned on, the MOS transistors 203 and 204 are turned off. At the same time that the MOS transistors 202 and 205 are turned off, the MOS transistors 203 and 204 are turned on.
- the inverter circuit 201 converts the input voltage into an AC voltage by switching and outputs the AC voltage to the rectifier circuit 210 via the resonance capacitor 209 and the transformer 206.
- a frequency modulation method is used in which the switching frequencies of the four MOS transistors 202 to 205 are changed by utilizing the resonance of one capacitor and the two inductances including the leakage inductance 207 and the excitation inductance 208 of the transformer 206 and the resonance capacitor 209. To change the output voltage.
- the output voltage from the transformer 206 is rectified by the rectifying circuit 210, smoothed by the smoothing capacitor 211, and then the rectified and smoothed DC voltage is output.
- DC-DC converter 105 configured as described above, switching loss can be reduced by zero voltage switching, and surge current and voltage can be reduced by a switching current close to a sine wave, and noise can be reduced.
- FIG. 3 is a perspective view showing the appearance of the transformer 206 of FIG. 2, and FIG. 4 is a vertical sectional view of the line AA'of FIG.
- the manufactured transformer 206 is placed on an air-cooled or water-cooled cooling device 305 that cools the transformer 206.
- the transformer 206 and the cooling device 305 constitute the transformer device.
- the direction orthogonal to the surface of the cooling device 305 in contact with the transformer 206 is defined as the y-axis direction
- the plane parallel to the contact surface is defined as the xz plane.
- the direction orthogonal to the y-axis direction is defined as the x-axis direction.
- the direction orthogonal to the xy plane is defined as the z-axis direction. That is, although the vertical direction in FIGS. 3 and 4 is described as the y-axis direction and the left-right direction is defined as the x-axis direction, it is not intended to limit the usage mode of the transformer 206.
- the transformer 206 includes a first core 301, a second core 302, a primary winding 303, and a secondary winding 304.
- the first core 301 and the second core 302 are composed of, for example, a ferrite core.
- the first core 301 is divided into a first core portion 301a and a second core portion 301b.
- the first core 301 is divided by a predetermined division surface, and a first division surface S1 of the first core portion 301a and a second division surface S2 of the second core portion are formed.
- the first divided surface S1 and the second divided surface S2 are planes parallel to the yz plane, respectively.
- the first core portion 301a includes an outer leg 301aa, an inner leg 301ab, and a first bottom surface portion 301ac.
- the second core portion 301b includes an outer leg 301ba, an inner leg 301bb, and a first bottom surface portion 301bc.
- the outer legs 301aa and 301ba are configured to extend in the y-axis direction.
- the first bottom surface portion 301ac is configured to extend from the upper end portion of the outer leg 301aa in the x-axis direction
- the inner leg 301ab is configured to extend from the right end portion of the first bottom surface portion 301ac in the ⁇ y axis direction. Will be done.
- the first bottom surface portion 301 bc is configured to extend from the upper end portion of the outer leg 301 ba in the ⁇ x axis direction
- the inner leg 301 bb extends from the left end portion of the first bottom surface portion 301 bc in the ⁇ y axis direction. It is configured as follows.
- the y-axis direction dimension of each of the inner legs 301ab and 301bb is configured to be shorter than the y-axis direction dimension of the outer legs 301aa and 301ba.
- the second core 302 is composed of an inner leg 302b and a bottom surface portion 302c.
- the inner leg 302b is configured to extend in the y-axis direction from the central portion of the bottom surface portion 302c
- the bottom surface portion 302c is configured to extend in the x-axis direction and the ⁇ x-axis direction from the lower end portion of the inner leg 302b. ..
- the first core portion 301a of the first core 301, the second core portion 301b of the first core 301, the second core 302, and the cooling device 305 are arranged as follows. (1) The side surface of the outer leg 301aa of the first core portion 301a on the x-axis direction side and the end surface (-x-axis direction side surface) of the bottom surface portion 302c of the second core portion 302 are arranged by being adhered with an adhesive. .. (2) The side surface of the outer leg 301ba of the second core portion 301b on the -x-axis direction side and the end surface (x-axis) on the opposite side of the end surface bonded to the first core portion 301a of the bottom surface portion 302c of the second core portion 302.
- the side surface on the directional side is bonded and arranged with an adhesive.
- (3) The end faces (-y-axis side end faces) of the inner legs 301ab of the first core portion 301a and the inner legs 301bb of the second core portion 301b are connected to the second core 302 via a predetermined gap G1. It is arranged so as to face the end surface (end surface on the y-axis direction side) of the inner leg 302b of the above.
- the first core portion 301a and the second core portion 301b of the first core 301 are arranged so as to face each other on the divided surfaces S1 and S2 via a predetermined gap G2.
- the x-axis direction side surface of the inner leg 301ab of the first core portion 301a and the ⁇ x-axis direction side surface of the inner leg 301bb of the second core portion 301b face each other via a predetermined gap G2. Arranged like this.
- the cooling device 305 is arranged so as to face the end surface of the outer leg 301aa of the first core portion 301a.
- the cooling device 305 is arranged so as to face the end surface of the outer leg 301ba of the second core portion 301b.
- the bottom surface portion 302c of the second core 302 and the cooling device 305 are arranged so as to face each other.
- the end surface of the outer leg 301aa of the first core portion 301a, the end surface of the outer leg 301ba of the second core portion 301b, and the bottom surface of the bottom surface portion 302c of the second core portion 302 are in contact with each other on the cooling device 305. Be placed. Further, as will be described later, the above-mentioned components may be in contact with each other via a filler.
- the inner legs 301ab and 301bb of the two core portions 301a and 301b of the first core 301 and the inner legs 302b of the second core 302 are separated from each other by having a gap G1 as described above. Are arranged facing each other.
- the exciting inductance 208 of the transformer 206 can be adjusted.
- the value of the leakage inductance also changes depending on the interval of the gap G1.
- the leakage inductance 207 is also adjusted by the distance between the primary winding 303 and the secondary winding 304.
- a filler made of an insulating material such as a silicone filler is filled.
- the second A filler may be inserted between the bottom surface portion 302c of the core 302 and the cooling device 305.
- the bobbin of a normal transformer, the bobbin cover that secures the insulation distance between the lead wire and the core and the winding, and the mechanism for positioning the bobbin and the core are not shown in the drawing, but they are added as appropriate. May be.
- the in-vehicle charging device 101 is provided with a cooling device 305 such as a water cooling device or an air cooling device to dissipate heat and cool each component.
- a cooling device 305 is arranged on the ⁇ y-axis direction side of the transformer 206 to dissipate heat generated by the transformer 206.
- FIG. 5 shows the distortion generated in each core 501 and 502 when a temperature difference occurs between the first core 501 and the second core 502 of the transformer in which the first core 501 is not divided into two according to the conventional example. It is a vertical sectional view to be enlarged and displayed.
- the first core 501 is deformed convexly upward due to the coefficient of thermal expansion of the first core 501, and tensile stress is applied to the outside.
- the thickness of the inner leg of the first core 501 which was the same size at the same temperature, is thicker than the thickness of the inner leg of the second core 502 like the expansion portion 503.
- core cracking may occur in the conventional E-type core.
- the transformer device according to the present embodiment is configured so that the first core portion 301a and the second core portion 301b are arranged apart from each other. Therefore, the stress is released and it becomes possible to reduce the core cracking.
- the end face of the outer leg 301a of the first core portion 301a and the end face of the outer leg 301ba of the second core portion 301b are placed on the cooling device 305, respectively, and each of them is mounted on the cooling device 305.
- the end face faces the cooling device 305. Therefore, since the first core portion 301a and the second core portion 301b can be directly cooled from the cooling device 305, the temperature difference of the core that causes distortion can be reduced. This makes it possible to reduce core cracking.
- the transformer 206 of the LLC resonance type DC-DC converter 105 has a core as shown in FIG. 4 in order to have a desired leakage inductance.
- the first core portion 301a is pressed against and adhered to the second core 302 in the x-axis direction.
- the side surface of the outer leg 301aa of the first core portion 301a on the x-axis direction side and the end surface of the bottom surface portion 302c of the second core portion 302 on the -x-axis direction side are adhered to each other by using the adhesive 401.
- the second core portion 301b is pressed against the second core 302 in the ⁇ x-axis direction and adhered using the adhesive 401.
- the side surface of the outer leg 301ba of the second core portion 301b on the -x-axis direction side and the end surface of the bottom surface portion 302c of the second core portion 302 on the x-axis direction side are adhered to each other.
- the arrow shown in FIG. 4 indicates that the first core portion 301a is pressed against the second core 302 in the x-axis direction and the second core portion 301b is pressed against the second core 302 in the ⁇ x axis direction.
- the dimension obtained by adding the x-axis direction dimension w4 of the first core portion 301a and the x-axis direction dimension w5 of the second core portion 301b is the x-axis direction dimension of the assembled core in consideration of manufacturing variation. Design so that it is smaller than w6. That is, it is designed so that w4 + w5 ⁇ w6.
- the first core 301 is divided into the first core portion 301a and the second core portion 301b, and the stress is released by separating the first core 301 from the core to crack the core. Can be reduced.
- the end surface of the outer leg 301a of the first core portion 301a and the end surface of the outer leg 301ba of the second core portion 301b are placed on the cooling device 305, respectively, and the above-mentioned Each end face is arranged so as to face the cooling device 305.
- the first core portion 301a and the second core portion 301b can be cooled directly from the cooling device 305, so that the temperature difference of the core that causes distortion can be reduced. This makes it possible to reduce core cracking. Further, it is possible to suppress the temperature rise of the first core portion 301a and the second core portion 301b. This makes it possible to reduce core cracking.
- the first core portion 301a is pressed against the second core 302 from the left direction to adhere to the transformer 206, and the second core portion 301b is directed to the right. Is pressed against the second core 302 and adhered.
- the x-axis direction dimension w1 of the outer leg 301aa of the first core portion 301a, the x-axis direction dimension w2 of the outer leg 301ba of the second core portion 301b, and the second core 302 at the time of core manufacturing.
- FIG. 6 is a vertical sectional view showing a configuration example of the transformer 206A according to the first modification.
- the transformer 206A is composed of a first core 301A and a second core 302A.
- the first core 301A is composed of a first core portion 301Aa and a second core portion 301Ab.
- the first core portion 301Aa includes an outer leg 301Aaa, an inner leg 301Aab, a first bottom surface portion 301Aac, and a second bottom surface portion 301Aad.
- the second bottom surface portion 301Aad of the first core portion 301Aa is formed so as to extend in the x-axis direction from the lower end portion of the outer leg 301Aaa of the first core portion 301Aa.
- the second core portion 301Ab includes an outer leg 301Aba, an inner leg 301Abb, a first bottom surface portion 301Abc, and a second bottom surface portion 301Abd.
- the second bottom surface portion 301Abd of the second core portion 301Ab is formed so as to extend in the ⁇ x-axis direction from the lower end portion of the outer leg 301Aba of the second core portion 301Ab.
- the second core 302A includes an inner leg 302Ab and a bottom surface portion 302Ac. Unlike the bottom surface portion 302c of the second core 302 of the transformer 206, the bottom surface portion 302A does not extend in the x-axis direction and the ⁇ x-axis direction from the lower end portion of the inner leg 302Ab, and the cross section is along with the inner leg 302Ab. It is formed to be a substantially rectangular parallelepiped.
- the second bottom surface portion 301Aad of the first core portion 301Aa is arranged so as to face the cooling device 305.
- the second bottom surface portion 301Abd of the second core portion 301Ab is arranged so as to face the cooling device 305.
- the bottom surface portion 302Ac of the second core 302A is arranged so as to face the cooling device 305.
- the second bottom surface portion 301Aad of the first core portion 301Aa and the second bottom surface portion 301Abd of the second core portion 301Ab are mounted on the cooling device 305, respectively. They are placed and their bottom surfaces are arranged so as to face the cooling device 305.
- the first core portion 301Aa and the second core portion 301Ab are in contact with the cooling device 305, and the facing area is widened. Therefore, the first core portion 301Aa and the second core portion 301Ab are formed. Cooling performance is improved. As a result, the temperature difference of the core that causes distortion can be reduced as compared with the configuration of the transformer 206 shown in FIG.
- the second core 302A of the transformer 206A is configured to be a substantially rectangular parallelepiped. Therefore, the second core 302A of the transformer 206A has a simpler structure than the second core 302 of the transformer 206 shown in FIG. 4, and can be easily manufactured.
- FIG. 7 is a vertical sectional view showing a configuration example of the transformer 206B according to the modified example 2.
- the transformer 206B is composed of a first core 301B and a second core 302B.
- the first core 301B is composed of a first core portion 301Ba and a second core portion 301Bb.
- the first core portion 301Ba includes an outer leg 301Baa, a first bottom surface portion 301Bac, and a second bottom surface portion 301Bad.
- the second core portion 301Bb includes an outer leg 301Bba, a first bottom surface portion 301Bbc, and a second bottom surface portion 301Bbd.
- the second core 302B includes an inner leg 302Bb and a bottom surface portion 302Bc.
- the first core portion 301Ba of the transformer 206B has a structure in which no inner leg is provided.
- the second core portion 301Bb of the transformer 206B has a structure in which no inner leg is provided, unlike the second core portion 301Ab of the transformer 206A. Therefore, in order to obtain the desired excitation inductance 208 or leakage inductance 207, the second core 302B adjusts the gap G1 by extending in the y-axis direction as compared with the second core 302A.
- the second bottom surface portion 301Bad of the first core portion 301Ba is arranged so as to face the cooling device 305.
- the second bottom surface portion 301Bbd of the second core portion 301Bb is arranged so as to face the cooling device 305.
- the bottom surface portion 302Bc of the second core 302B is arranged so as to face the cooling device 305.
- the second bottom surface portion 301Bad of the first core portion 301Ba and the second bottom surface portion 301Bb of the second core portion 301Bb are placed on the cooling device 305 and they are mounted on the cooling device 305.
- the bottom surface of the is arranged so as to face the cooling device 305.
- first core portion 301Ba of the transformer 206B does not have a portion corresponding to the inner leg 301Aab of the first core portion 301Aa of the transformer 206A shown in FIG.
- second core portion 301Bb of the transformer 206B does not have a portion corresponding to the inner leg 301Abb of the second core portion 301Ab of the transformer 206A shown in FIG. Therefore, the first core portion 301Ba and the second core portion 301Bb of the transformer 206B have a simpler structure than the first core portion 301Aa and the second core portion 301Ab of the transformer 206A shown in FIG. Can be manufactured.
- the transformer device according to the present embodiment described above may be configured as follows.
- the transformer device has a first core and a second core arranged so as to insert a primary winding, a secondary winding, and the primary winding and the secondary winding so as to face each other.
- a transformer including a core and a cooling device for cooling the transformer are provided, and the first core includes a first core portion and a second core portion divided by a predetermined division surface from each other, and the first core portion is provided.
- the first core portion and the second core portion of one core are arranged so as to face each other through a gap, and the first core and the cooling device are arranged so as to face each other.
- the first core can be configured to be cooled by the cooling device. Therefore, it is possible to suppress the temperature change of the first core and suppress the occurrence of cracks in the first core.
- the second core and the cooling device may be arranged so as to face each other.
- the second core can be configured to be cooled by the cooling device. Therefore, it is possible to suppress the temperature change of the second core and suppress the occurrence of cracks in the second core.
- the first core is divided by the division surface, and the first division surface of the first core portion and the second core portion are the first.
- the two divided surfaces may be formed, and the first divided surface and the second divided surface may be arranged so as to face each other.
- the first core and the second core may be arranged so as to face each other through a gap.
- the first core is divided into the first core portion and the second core portion in the horizontal direction on the division surface.
- the first core portion and the second core portion each have an outer leg extending in the vertical direction on the outside in the horizontal direction, and each outer leg has an outer leg such that the bottom surface of each outer leg faces the cooling device.
- the first core portion and the second core portion may be arranged and adhere to the second core so as to be sandwiched from the outside in the horizontal direction with respect to the second core.
- the first core portion and the second core portion have a first bottom surface portion extending from the upper portion of each outer leg toward the center in the horizontal direction and the first bottom surface portion, respectively. Further comprises a first inner leg extending vertically from the horizontal central end of the bottom surface towards the second core, the second core extending horizontally between the outer legs. A second bottom surface portion and a second inner leg extending vertically from the center portion of the first bottom surface portion toward each of the first inner legs are provided, and the second bottom surface portion is the cooling device. It may be arranged so as to face the.
- the first core portion and the second core portion have a first bottom surface portion extending from the upper portion of each outer leg toward the center in the horizontal direction and the first bottom surface portion, respectively.
- a first inner leg extending vertically from the horizontal center side end portion of the bottom surface portion toward the second core, and a third bottom surface portion extending horizontally toward the center side from the lower portion of each outer leg portion.
- the second core further comprises a second inner leg extending in the vertical direction towards each of the first inner legs, the bottom surface of the second inner leg and the third bottom surface portion.
- the bottom surface may be arranged so as to face the cooling device.
- the areas of the first core portion and the second core portion cooled by the cooling device are increased, so that the cooling performance can be improved. Therefore, it is possible to improve the cooling property for each core, suppress the temperature change of each core, and suppress the occurrence of cracks in each core.
- the structure of the second core can be simplified and can be manufactured more easily.
- the first core portion and the second core portion are each a first bottom surface portion extending from the upper portion of each outer leg toward the center side in the horizontal direction and each outer portion. Further comprising a third bottom surface extending horizontally from the bottom of the leg to the center, the second core extends vertically toward the center end of each first bottom surface.
- the bottom surface of the second inner leg and the bottom surface of the third bottom surface portion may be arranged so as to face the cooling device.
- the areas of the first core portion and the second core portion cooled by the cooling device are increased, so that the cooling performance can be improved. Therefore, it is possible to improve the cooling property for each core, suppress the temperature change of each core, and suppress the occurrence of cracks in each core.
- the structure of the first core portion, the second core portion, and the second core can be simplified, and can be manufactured more easily.
- the second bottom surface portion may be in contact with the cooling device so that the cooling device cools the second core.
- the bottom surface of the cooling device may be in contact with the cooling device.
- the first core portion, the second core portion, and the second core can be directly cooled by the cooling device. Therefore, it is possible to improve the cooling property for each core, suppress the temperature change of each core, and suppress the occurrence of cracks in each core.
- the first core portion and the second core portion are used so that the cooling device cools the first core and the second core.
- the core portion and the second core may be placed so as to be in contact with the cooling device.
- the first core portion, the second core portion, and the second core can be directly cooled by the cooling device. Therefore, it is possible to improve the cooling property for each core, suppress the temperature change of each core, and suppress the occurrence of cracks in each core.
- the charging device for supplying a charging voltage to a rechargeable battery according to the present disclosure includes a transformer device according to any one of aspects 1 to 11.
- the power supply device of the present disclosure for supplying a power supply voltage to a load includes a transformer device according to any one of aspects 1 to 11.
- the transformers 206, 206A, and 206B according to the present disclosure are not limited to the DC-DC converter 105 of the charging device 101 of FIG. 1 that supplies the charging voltage to the rechargeable battery 106, and various power supply devices that supply a predetermined power supply voltage to the load. Can also be used.
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Abstract
Description
前記トランスを冷却する冷却装置とを備え、
前記第1のコアは、互いに所定の分割面で分割された第1のコア部と第2のコア部とを備え、
前記第1のコアの前記第1のコア部と前記第2のコア部はギャップを介して互いに対向するように配置され、
前記第1のコアと前記冷却装置は互いに対向するように配置される、
ことを特徴とする。
図1は本開示の実施形態に係る車載充電装置101の構成例を示すブロック図である。図1の車載充電装置101は、商用交流電源102からの交流電力を直流電力に変換して充電池106に出力し、DC-DCコンバータ105に内蔵されるトランス206によりその変換前後を絶縁することを特徴とする。なお、車載充電装置101は充電装置又は電源装置の一例であり、充電池106は負荷等の一例である。
(1)第1のコア部301aの外脚301aaのx軸方向側側面と、第2のコア302の底面部302cの端面(-x軸方向側側面)が接着剤で接着されて配置される。
(2)第2のコア部301bの外脚301baの-x軸方向側側面と、第2のコア302の底面部302cの第1のコア部301aと接着した端面の反対側の端面(x軸方向側側面)が接着剤で接着されて配置される。
(3)第1のコア部301aの内脚301ab及び第2のコア部301bの内脚301bbの各端面(-y軸方向側端面)は、所定のギャップG1を介して、第2のコア302の内脚302bの端面(y軸方向側端面)に対向するように配置される。
(4)第1のコア301の第1のコア部301aと第2のコア部301bは、各分割表面S1、S2で、互いに所定のギャップG2を介して、対向するように配置される。すなわち、第1のコア部301aの内脚301abのx軸方向側側面と、第2のコア部301bの内脚301bbの-x軸方向側側面とが、互いに所定のギャップG2を介して対向するように配置される。
(5)第1のコア部301aの外脚301aaの端面と、冷却装置305が対向するように配置される。
(6)第2のコア部301bの外脚301baの端面と、冷却装置305が対向するように配置される。
(7)第2のコア302の底面部302cと、冷却装置305が対向するように配置される。
図6は変形例1に係るトランス206Aの構成例を示す縦断面図である。トランス206Aは、第1のコア301Aと第2のコア302Aで構成される。第1のコア301Aは第1のコア部301Aaと第2のコア部301Abで構成される。
図7は変形例2に係るトランス206Bの構成例を示す縦断面図である。トランス206Bは、第1のコア301Bと第2のコア302Bで構成される。第1のコア301Bは第1のコア部301Baと第2のコア部301Bbで構成される。
以上のように説明した本実施形態に係るトランス装置は、以下のように構成してもよい。
102 商用交流電源
103 整流及び平滑回路
104 力率改善回路(PFC回路)
105 DC-DCコンバータ
106 充電池
201 インバータ回路
202~205 MOSトランジスタ
206,206A,206B トランス
207 漏れインダクタンス
208 励磁インダクタンス
209 共振キャパシタ
210 整流回路
211 平滑キャパシタ
212 インダクタンス
220 制御回路
301,301A,301B 第1のコア
301a,301Aa,301Ba 第1のコア部
301b,301Ab,301Bb 第2のコア部
301aa,301ba,301Aaa,301Aba,301Baa,301Bba 外脚
301ab,301bb,301Aab,301Abb,301Bab,301Bbb 内脚
301ac,301bc,301Aac,301Abc,301Bac,301Bbc 第1の底面部
301Aad,301Abd,301Bad,301Bbd 第2の底面部
302,302A,302B 第2のコア
302b,302Ab,302Bb 内脚
302c,302Ac,302Bc 底面部
303 1次巻線
304 2次巻線
305 冷却装置
401 接着剤
501 第1のコア
502 第2のコア
503 膨張部
G1 ギャップ
G2 ギャップ
S1,S2 分割表面
T1~T4 端子
Claims (13)
- 1次巻線、2次巻線、並びに前記1次巻線及び前記2次巻線を挿通しかつ互いに対向するように配置される第1のコアと第2のコアを備えるトランスと、
前記トランスを冷却する冷却装置とを備え、
前記第1のコアは、互いに所定の分割面で分割された第1のコア部と第2のコア部とを備え、
前記第1のコアの前記第1のコア部と前記第2のコア部はギャップを介して互いに対向するように配置され、
前記第1のコアと前記冷却装置は互いに対向するように配置される、
トランス装置。 - 前記第2のコアと前記冷却装置は互いに対向するように配置される、
請求項1に記載のトランス装置。 - 前記第1のコアは、前記分割面で分割されて、前記第1のコア部の第1の分割表面と前記第2のコア部の第2の分割表面とを形成し、前記第1の分割表面と前記第2の分割表面とが互いに対向するように配置される、
請求項1又は2に記載のトランス装置。 - 前記第1のコアと前記第2のコアはギャップを介して互いに対向するように配置される、
請求項1~3のうちのいずれか1つに記載のトランス装置。 - 前記第1のコアは、前記分割面で水平方向で、前記第1のコア部と前記第2のコア部に分割され、
前記第1のコア部と前記第2のコア部はそれぞれ、水平方向の外側において垂直方向に延びる外脚を備え、
前記各外脚は、前記各外脚の底面が前記冷却装置と対向するように配置され、
前記第1のコア部と前記第2のコア部は、前記第2のコアに対して水平方向の外側から挟み込むように前記第2のコアと接着する、
請求項1~4のうちいずれか1つに記載のトランス装置。 - 前記第1のコア部と前記第2のコア部はそれぞれ、
前記各外脚の上部から水平方向中央側に延びる第1の底面部と、
前記第1の底面部の水平方向中央側端部から垂直方向に前記第2のコアに向かって延びる第1の内脚とをさらに備え、
前記第2のコアは、
前記各外脚間で水平方向に延びる第2の底面部と、
前記第2の底面部の中央部から垂直方向に前記各第1の内脚に向かって延びる第2の内脚とを備え、
前記第2の底面部は前記冷却装置と対向するように配置される、
請求項5に記載のトランス装置。 - 前記第1のコア部と前記第2のコア部はそれぞれ、
前記各外脚の上部から水平方向中央側に延びる第1の底面部と、
前記第1の底面部の水平方向中央側端部から垂直方向に前記第2のコアに向かって延びる第1の内脚と、
前記各外脚の下部から水平方向中央側に延びる第3の底面部とをさらに備え、
前記第2のコアは、
前記垂直方向に前記各第1の内脚に向かって延びる第2の内脚をさらに備え、
前記第2の内脚の底面および前記第3の底面部の底面は前記冷却装置と対向するように配置される、
請求項5に記載のトランス装置。 - 前記第1のコア部と前記第2のコア部はそれぞれ、
前記各外脚の上部から水平方向中央側に延びる第1の底面部と、
前記各外脚の下部から水平方向中央側に延びる第3の底面部とをさらに備え、
前記第2のコアは、
前記垂直方向に、前記各第1の底面部の中央側端部に向かって延びる第2の内脚をさらに備え、
前記第2の内脚の底面および前記第3の底面部の底面は前記冷却装置と対向するように配置される、
請求項5に記載のトランス装置。 - 前記冷却装置が前記第2のコアを冷却するように、前記第2の底面部は前記冷却装置と接する、
請求項6に記載のトランス装置。 - 前記冷却装置が前記第1のコアおよび前記第2のコアを冷却するように、前記第2の内脚の底面および前記第3の底面部の底面は前記冷却装置と接する、
請求項7又は8に記載のトランス装置。 - 前記冷却装置が前記第1のコアおよび前記第2のコアを冷却するように、前記第1のコア部および前記第2のコア部並びに前記第2のコアは、前記冷却装置と接するように載置される、
請求項1~10のうちのいずれか1つに記載のトランス装置。 - 充電池に充電電圧を供給する充電装置であって、
請求項1~11のうちのいずれか1つに記載のトランス装置を備える、
充電装置。 - 負荷に電源電圧を供給する電源装置であって、
請求項1~11のうちのいずれか1つに記載のトランス装置を備える、
電源装置。
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Publication number | Priority date | Publication date | Assignee | Title |
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JP2010098207A (ja) * | 2008-10-20 | 2010-04-30 | Nippon Soken Inc | トランス |
JP2011253877A (ja) * | 2010-06-01 | 2011-12-15 | Denso Corp | 磁気部品ユニット及び磁気部品固定構造 |
JP2012059942A (ja) * | 2010-09-09 | 2012-03-22 | Toyota Industries Corp | 磁性コアおよび誘導機器 |
JP2015103538A (ja) * | 2013-11-21 | 2015-06-04 | カルソニックカンセイ株式会社 | トランスコア冷却構造 |
JP2017168564A (ja) * | 2016-03-15 | 2017-09-21 | Ntn株式会社 | 磁性素子 |
WO2021117811A1 (ja) * | 2019-12-11 | 2021-06-17 | パナソニックIpマネジメント株式会社 | トランスとその製造方法、充電装置及び電源装置 |
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JP2010098207A (ja) * | 2008-10-20 | 2010-04-30 | Nippon Soken Inc | トランス |
JP2011253877A (ja) * | 2010-06-01 | 2011-12-15 | Denso Corp | 磁気部品ユニット及び磁気部品固定構造 |
JP2012059942A (ja) * | 2010-09-09 | 2012-03-22 | Toyota Industries Corp | 磁性コアおよび誘導機器 |
JP2015103538A (ja) * | 2013-11-21 | 2015-06-04 | カルソニックカンセイ株式会社 | トランスコア冷却構造 |
JP2017168564A (ja) * | 2016-03-15 | 2017-09-21 | Ntn株式会社 | 磁性素子 |
WO2021117811A1 (ja) * | 2019-12-11 | 2021-06-17 | パナソニックIpマネジメント株式会社 | トランスとその製造方法、充電装置及び電源装置 |
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