WO2017038567A1 - 電力変換装置 - Google Patents
電力変換装置 Download PDFInfo
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- WO2017038567A1 WO2017038567A1 PCT/JP2016/074597 JP2016074597W WO2017038567A1 WO 2017038567 A1 WO2017038567 A1 WO 2017038567A1 JP 2016074597 W JP2016074597 W JP 2016074597W WO 2017038567 A1 WO2017038567 A1 WO 2017038567A1
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- 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
- 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
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2847—Sheets; Strips
-
- 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
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
- H01F27/306—Fastening or mounting coils or windings on core, casing or other support
-
- 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
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/323—Insulation between winding turns, between winding layers
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
Definitions
- the present invention relates to a power converter, and more particularly to a power converter including a magnetic component such as a transformer.
- Patent Document 1 a primary printed circuit board in which a primary side winding is wound around a through hole and a secondary side around the through hole, as disclosed in, for example, Japanese Patent Application Laid-Open No. 7-115024 (Patent Document 1).
- Patent Document 1 A configuration is disclosed in which a secondary printed circuit board around which a side winding is wound is laminated, and two cores are inserted into the through hole.
- the primary winding and the secondary winding are sandwiched between the core inserted from the primary printed circuit board side and the core inserted from the secondary side. .
- Patent Document 2 a primary side winding and a secondary side winding are wound around a through hole formed in a single flexible substrate.
- Patent Document 2 a configuration in which two cores are inserted and the surface of the flexible substrate is bent along the extending direction of the two cores.
- the primary side winding and the secondary side winding are sandwiched between the core inserted from one surface side of the flexible substrate and the core inserted from the other surface side. It has become.
- the primary and secondary windings are formed of a copper foil pattern, and the position of the pattern is fixed by a resin material formed on the substrate. Thereby, the distance between each coil
- Patent Document 1 and Patent Document 2 Since each winding in Patent Document 1 and Patent Document 2 is formed as a copper foil pattern, its thickness is thin and its current cross-sectional area is small. For this reason, the said coil
- Patent Document 2 has the advantage that the transformer structure is miniaturized by bending the flexible substrate, but the heat generation of the secondary winding disposed on the side close to the core, i.e., the inner side, is particularly reduced by bending. It is difficult to dissipate heat.
- the present invention has been made in view of the above-described problems, and an object thereof is to provide a power conversion device that can combine high heat dissipation of windings and downsizing of the entire device.
- the power conversion device of the present invention includes a magnetic core and a plurality of windings.
- the plurality of windings are wound outside the magnetic core and bent so as to have a portion extending in the direction in which the magnetic core extends. All of the plurality of windings are bent so as to include a region arranged on the outermost side with respect to the magnetic core among all the plurality of windings.
- the entire power converter is miniaturized.
- all of the plurality of windings are bent so as to include a region arranged on the outermost side with respect to the magnetic core, heat generation of the windings can be efficiently radiated from the region arranged on the outside.
- FIG. 1 is a schematic cross-sectional view illustrating a configuration of a power conversion device according to a first example of Embodiment 1.
- FIG. 1 the aspect of the first winding wound around the outer side of the middle leg of the lower magnetic core and before being bent is viewed from above the first winding.
- the schematic plan view (A) and the first example of the first embodiment the second winding is wound around the outside of the middle leg of the lower magnetic core and is not bent. It is the schematic plan view (B) seen from the lower side rather than the coil
- 3A is a schematic cross-sectional view of the portion along the line IVA-IVA in FIG. 3A, FIG.
- FIG. 3A is a schematic cross-sectional view of the portion along the line IVB-IVB in FIG. 3B
- FIG. FIG. 4 is a schematic cross-sectional view (C) of a portion along line IVC-IVC.
- the aspect of the first winding wound around the middle leg of the lower magnetic core and bent is viewed from above the first winding.
- the second winding is wound on the outer side of the middle leg of the lower magnetic core and is bent. It is the schematic plan view (B) seen from the lower side rather than the coil
- FIG. 6 is a schematic cross-sectional view (A) of a portion along the line VIA-VIA in FIG.
- FIG. 3 is a schematic cross-sectional view showing a configuration of a second example different from the configuration of the power conversion device of FIG. 2 in the first embodiment. It is a disassembled perspective view which shows the structure of the power converter device of the 1st example of Embodiment 1 shown in FIG.
- FIG. 3 is a schematic cross-sectional view showing a configuration of a power conversion device of a first example of a second embodiment. It is a disassembled perspective view which shows the structure of the power converter device of the 1st example of Embodiment 2 shown in FIG.
- FIG. 6 is a schematic cross-sectional view showing a configuration of a power conversion device of a second example of Embodiment 2.
- FIG. It is a schematic sectional drawing which shows the assembly method of the power converter device of the 2nd example of Embodiment 2 shown in FIG.
- FIG. 6 is a schematic cross-sectional view illustrating a configuration of a power conversion device according to a third embodiment.
- it is the schematic top view which looked at the aspect of the 1st coil
- FIG. 15 is a schematic cross-sectional view of a portion along line XV-XV in FIG. 14 after the first and second windings of the third embodiment are bent and assembled.
- 6 is a schematic cross-sectional view showing a configuration of a power conversion device of a first example of Embodiment 4.
- FIG. 6 is a schematic cross-sectional view showing a configuration of a power conversion device of a second example of Embodiment 4.
- FIG. 10 is a schematic cross-sectional view showing a configuration of a power conversion device of a third example of Embodiment 4.
- Embodiment 1 FIG. First, an example of a circuit diagram of the power conversion device of the present embodiment will be described with reference to FIG. Referring to FIG. 1, the power conversion device of the present embodiment mainly includes an input side drive circuit 1, an output side drive circuit 2, and a transformer 10.
- the input side driving circuit 1 has four switching elements 31A, 31B, 31C, 31D and a capacitor 32A.
- the output side drive circuit 2 includes four rectifying elements 31E, 31F, 31G, and 31H, a capacitor 32B, and a coil 33.
- the transformer 10 has a primary side winding 15 and a secondary side winding 16.
- switching elements 31A, 31B, 31C, 31D are connected as shown in FIG. Specifically, switching elements 31A and 31C connected in series and switching elements 31B and 31D connected in series are connected in parallel.
- a connection point 11A exists between the switching element 31A and the switching element 31C, and a connection point 11B exists between the switching element 31B and the switching element 31D.
- the primary winding 15 is connected between the connection point 11A and the connection point 11B.
- Switching elements 31A, 31B, 31C, and 31D are semiconductor elements such as MOSFETs (Metal Oxide Semiconductor Field Effect Transistors) that are controlled to be alternately turned on and off in order to generate positive and negative voltages in primary winding 15 of transformer 10. It is. Positive and negative voltage generated in the primary winding 15 of the transformer 10 is determined by the input voltage V in applied to the capacitor 32A.
- rectifying elements 31E, 31F, 31G, and 31H are connected as shown in FIG. Specifically, rectifying elements 31E and 31G connected in series and rectifying elements 31F and 31H connected in series are connected in parallel.
- the rectifier elements 31E, 31F, 31G, and 31H are, for example, generally known diodes.
- FIG. 1 the anode of the rectifier element 31E and the cathode of the rectifier element 31G, and the anode of the rectifier element 31F and the cathode of the rectifier element 31H , Each connected.
- a connecting point 12A exists between the rectifying element 31E and the rectifying element 31G, and a connecting point 12B exists between the rectifying element 31F and the rectifying element 31H.
- the second winding 12 is connected between the connection point 12A and the connection point 12B. Accordingly, the rectifier elements 31E, 31F, 31G, and 31H have a function of rectifying the voltage generated in the secondary winding 16 of the transformer 10.
- a coil 33 and a capacitor 32B are connected to the output side drive circuit 2, and these have a function of smoothing the voltage rectified by the rectifying elements 31E, 31F, 31G, 31H.
- one end of the coil 33 is connected to the cathodes of the rectifying elements 31E and 31F, and the other end of the coil 33 is connected to one end of the capacitor 32B.
- the other end of the capacitor 32B is connected to the anodes of the rectifying elements 31G and 31H.
- the output voltage Vout applied to the capacitor 32B is determined by the turn ratio between the primary side winding 15 and the secondary side winding 16 constituting the transformer 10 and the on / off times of the switching elements 31A, 31B, 31C, 31D. control of or higher with respect to the input voltage V in (boost) or or lower (step-down) is performed.
- the power conversion device 100 of the first example of the present embodiment includes the transformer 10 described above.
- the transformer 10 mainly has, for example, a pair of I-type magnetic core 21 and E-type magnetic core 22 that are magnetic cores, and a first winding 11 and a second winding 12 that are a plurality of windings. ing.
- the I-type magnetic core 21 and the E-type magnetic core 22 are members having magnetism provided to configure the transformer 10 (see FIG. 1) as a magnetic component.
- the I-type magnetic core 21 is placed so as to overlap the E-type magnetic core 22 in a plan view (a mode viewed from above in FIG. 2).
- the first winding 11 corresponds to the primary winding 15 in FIG. 1
- the second winding 12 corresponds to the secondary winding 16 in FIG.
- the magnetic component is not the transformer 10
- the first winding 11 and the second winding 12 may not necessarily correspond to the primary winding 15 and the secondary winding 16 of the transformer 10. is there. Therefore, in the present specification, from the viewpoint of unifying contents, in all the embodiments, the primary winding 15 and the secondary winding 16 in FIG.
- the first winding 11 and the second winding 12 are indicated.
- the I-type magnetic core 21 is a so-called I-type core having a rectangular flat plate shape
- the E-type magnetic core 22 includes outer legs 22A and 22B and middle legs 22C.
- a so-called E-type core including the core connecting portion 22D For example, in FIG. 4C, the outer legs 22A and 22B and the middle leg 22C extend in the vertical direction in the figure, and the core connecting portion 22D extends in the horizontal direction in the figure.
- the middle foot 22C is disposed so as to be sandwiched between the outer foot 22A and the outer foot 22B and spaced from the outer foot 22A and the outer foot 22B.
- the core connecting portion 22D is integrated with the outer legs 22A and 22B and the middle leg 22C and is orthogonal thereto.
- the first winding 11 and the second winding 12 which are a plurality of (two in this case) windings, here are particularly E-type magnetic. It is wound on the outer side of the middle leg 22C which is a part of the core 22.
- both the first winding 11 and the second winding 12 have four turns, but the number of turns of the first winding 11 and the second winding 12 is arbitrary.
- Both the first winding 11 and the second winding 12 are wound with the respective turns to the outside of the middle leg 22C spaced apart from each other.
- the insulating member 63 is provided so that it may overlap with the plane formed by the said each turn of the 1st coil
- the first winding 11 is wound on the upper side (I-type magnetic core 21 side) in FIG. 2 than the second winding 12.
- the second winding 12 may be wound above the first winding 11 in FIG.
- an insulating member is provided in a region sandwiched between a plurality of windings, that is, between the first winding 11 (one winding) and the second winding 12 (the other winding). 63 is sandwiched. The insulating member 63 here is in contact with both the first winding 11 and the second winding 12.
- FIGS. 3A and 3B show the first winding 11 and the second winding before being bent at the alternate long and short dash lines F1 and F2 (that is, only wound outside the middle foot 22C).
- the state of the winding 12 is shown. That is, referring to FIG. 4A, for example, a portion of the first winding 11 extending in the left-right direction in FIG. 3A has an I-type magnetic core 21 directly above and an E-type magnetism directly below it.
- the core connecting portions 22D of the core 22 are arranged (with a space between each other).
- the left and right ends of the first winding 11 that extend in the left-right direction in the figure are arranged with an I-type magnetic core 21 and an E-type magnetic core 22 directly above and below the left and right ends when not bent. Absent. 4B, the portion in which the first winding 11 in FIG. 3A extends in the vertical direction is a region where the I-type magnetic core 21 and the E-type magnetic core 22 overlap each other. Arranged in the outer area. Although only the first winding 11 is shown and described here, the second winding 12 is basically the same as described above.
- first winding 11 and second winding 12 shown in FIGS. 3 and 4 are located in the direction toward the back of the page in the dashed-dotted line F ⁇ b> 1 in FIGS. 3 and 5. It is bent forward in the drawing on the dotted line F2 in FIG.
- the region on the left side of the alternate long and short dash line F1 and the right side of the dotted line F2 in FIG. 3A is bent so as to be substantially orthogonal to the region sandwiched between the alternate long and short dashed line F1 and the dotted line F2.
- the region extending along the vertical direction of the direction in which the middle leg 22C of the E-type magnetic core 22 extends is provided on the left and right sides of FIG. 6 (A).
- the first winding 11 since the first winding 11 is wound four turns, the first winding 11 of each turn is spaced apart from each other in the sectional view. It is lined up and down.
- a layer of an insulating member 63 is disposed on the E-type magnetic core 22 side of the first winding 11.
- the first winding 11, the second winding 12, the I-type magnetic core 21, and the E-type magnetic core 22 of the present embodiment have the modes shown in FIGS. Is not the embodiment shown in FIG. 2 in any cross section.
- the mode shown in FIG. 2 is close to the side view seen in the direction of the arrow from the position indicated by arrow II in FIGS. 3 (A) and 5 (A).
- the configuration of the power conversion device 100 will be described using a pseudo sectional view such as a side view shown in FIG.
- first windings 11 and second windings 12 are bent at alternate long and short dash lines F ⁇ b> 1 and F ⁇ b> 2.
- one end of each of the first winding 11 and the second winding 12 that is, the first portion between the lowermost portion in FIG. 2 and the first bent portion by the alternate long and short dash line F1, and the above 2, that is, the second portion between the uppermost portion in FIG. 2 and the second bent portion by the dotted line F ⁇ b> 2 extends along the vertical direction of FIG. 2 in which the magnetic cores 21 and 22 extend. Further, the first portion extends from the first bent portion to the lower side in FIG.
- each of the two first windings 11 and the second winding 12 is bent so as to have a so-called S-shape.
- the insulating member 63 sandwiched between them is also bent at positions corresponding to the first and second bent portions.
- the lowermost part 11E1 of the first winding 11 in the sectional view as shown in FIG. 2 when viewed along the extending direction of the magnetic cores 21 and 22 (vertical direction in FIG. 2) is one end.
- the uppermost part 11E2 is defined as the other end.
- the bent portion on the side close to the lowermost portion 11E1 is defined as the first bent portion 11T1
- the bent portion on the side close to the uppermost portion 11E2 is defined as the second bent portion 11T2.
- a region between the lowermost part 11E1 and the first bent part 11T1 is a first part
- a region between the second bent part 11T2 and the uppermost part 11E2 is a second part.
- the lowermost portion 12E1 of the second winding 12 in the sectional view as shown in FIG. 2 when viewed along the extending direction of the magnetic cores 21 and 22 (vertical direction in FIG. 2) is one end.
- the uppermost part 12E2 are defined as the other end.
- the bent portion on the side close to the lowermost portion 12E1 of the second winding 12 is defined as the first bent portion 12T1
- the bent portion on the side closer to the uppermost portion 12E2 is defined as the second bent portion 12T2.
- a region between the lowermost portion 12E1 and the first bent portion 12T1 is a first portion
- a region between the second bent portion 12T2 and the uppermost portion 12E2 is a second portion.
- the first portion of the first winding 11 (one winding) is bent into the second winding 12 (the other winding) by being bent so as to have an S shape. It arrange
- the second portion of the second winding 12 is disposed on the outer side with respect to the magnetic cores 21 and 22 than the second portion of the first winding 11.
- Both the first winding 11 and the second winding 12 are electrically connected to the printed circuit board (electrode pads formed on the printed circuit board) by passing through the printed circuit board not shown in FIG. .
- the portions where the first winding 11 and the second winding 12 extend toward the printed circuit board can be electrically connected to other elements as lead portions 13 and 14.
- the respective lead portions 13 and 14 of the first winding 11 and the second winding 12 are wound around the middle leg 22C with reference to, for example, FIGS. 3A and 3B again.
- It can be formed by an insulating member 65 provided so as to be able to intersect with the extending first winding 11 and second winding 12 without short-circuiting.
- Insulating member 65 is preferably formed of, for example, an insulating tape made of polyester or polyimide material, or an insulating sheet such as silicone material.
- An insulating member 61 is disposed on the side. The insulating member 61 is in contact with both the first winding 11 and the magnetic core (I-type magnetic core 21 and E-type magnetic core 22).
- An insulating member 62 is disposed between the surface of the second winding 12 opposite to the side facing the first winding 11 and the magnetic core (E-type magnetic core 22). The insulating member 62 is in contact with both the second winding 12 and the E-type magnetic core 22.
- the insulating members 61 and 62 are made of the same insulating material as the insulating member 63.
- the insulating members 61, 62, and 63 may be formed by bending insulating paper such as amyrad paper.
- the insulating members 61, 62, and 63 may be formed by molding a resin material such as polyphenylene sulfide or polybutylene terephthalate.
- FIGS. 6A and 6B in the sectional view, a plurality of first windings 11 and second windings 12 are spaced from each other in accordance with the number of turns. It becomes an aspect which can be visually recognized. However, in FIG. 2, such an aspect is omitted from the viewpoint of simplification, and is continuously arranged in the extending direction.
- FIG. 2 considering that the I-type magnetic core 21 as the I-type core has a smaller vertical dimension (thinner thickness) than the E-type magnetic core 22 as the E-type core in FIG.
- the illustration shows that the E-type magnetic core 22 extends to a region above the first winding 11 and the second winding 12 extending in the left-right direction.
- the present invention is not limited to this mode.
- power converter 101 as a second example of the present embodiment includes first winding 11 and second winding extending in the left-right direction in FIG. 2.
- An embodiment in which the I-type magnetic core 21 is disposed on the entire upper side of the winding 12 and the E-type magnetic core 22 is disposed on the entire lower side may be employed.
- FIG. 1 the I-type magnetic core 21 is disposed on the entire upper side of the winding 12 and the E-type magnetic core 22 is disposed on the entire lower side
- the windings 11, 12 and the insulating members 61, 62, 63 are wound around the uppermost region of the middle leg 22 ⁇ / b> C of the E-type magnetic core 22.
- the power conversion device 101 in FIG. 7 is basically the same as the power conversion device 100 as the first example of the present embodiment in FIG. 2 except for the above points, the same components are the same. A reference number is attached and the description is not repeated.
- E-type magnetic core 22 is prepared as the lowermost layer among the constituent members stacked in the vertical direction.
- the E-type magnetic core 22 is preferably placed so that the core connecting portion 22D is the lowermost portion, and the outer legs 22A, 22B and the middle legs 22C are projected on the upper side.
- the insulating member 62, the second winding 12, the insulating member 63, the first winding 11 and the insulating member 61 are laminated in this order.
- each of the insulating member 62, the second winding 12, the insulating member 63, the first winding 11, and the insulating member 61 has openings 62 ⁇ / b> C such as through holes for penetrating the middle legs 22 ⁇ / b> C.
- the magnetic component is the transformer 10 (see FIG. 1)
- the first winding 11 is the primary winding 15 (see FIG. 1)
- the second winding 12 is the secondary winding 16 (FIG. 1). Respectively).
- the insulating members 61, 62, 63 are prepared as separate members.
- the first winding 11 and the second winding 12 bent in an S-shape are insert-molded with a resin material such as polyphenylene sulfide having high insulating properties, so that the insulating members 61, 62, 63 May be supplied as an integral member, and they may be superposed on the first winding 11 and the second winding 12 as in FIG.
- the flat rectangular I-type magnetic core 21 is placed so as to straddle the outer legs 22A and 22B and the middle leg 22C of the E-type magnetic core 22 from above the insulating member 61.
- the dimension in the vertical direction of the portion extending in the vertical direction of the figure due to the bending of the insulating member 61 and the first winding 11 is shown much shorter than that in FIG. This is because the dimension in the vertical direction is adjusted so that many members such as the insulating members 63 and 62 and the second winding 12 are stacked in the vertical direction. That is, although the length is short, the portions where the windings 11, 12 and the like in FIG. 8 extend in the vertical direction correspond to the portions where the windings 11, 12 and the like in FIG. 2 extend in the vertical direction. Accordingly, as shown in FIG. 2, for example, the vertical dimension of the portion extending toward the upper side of the first winding 11 is long enough to penetrate the printed circuit board disposed above the windings 11 and 12. It has become. Similarly, the vertical dimension of the other members is actually longer than shown in FIG.
- each of the plurality of windings that is, the first winding 11 and the second winding 12 has an S shape. It is bent to have. Accordingly, the transformer 10 is reduced in size so that the first portion extending from the first bent portion and the second portion extending from the second bent portion extend along the extending direction of the magnetic cores 21 and 22. be able to. That is, the entire power conversion device 100 including the first winding 11 and the second winding 12 is downsized to the same extent as a structure in which the I-type magnetic core 21 and the E-type magnetic core 22 are superimposed. be able to.
- both the first winding 11 and the second winding 12 are disposed outside the magnetic cores 21 and 22 in the windings 11 and 12. Is bent to include. Specifically, as described above, the first winding 11 has a first portion, and the second winding 12 has a second portion with respect to the magnetic cores 21 and 22 (rather than the other winding). ) It is placed outside and exposed outside. Therefore, both of the windings 11 and 12 can radiate the generated heat from the portion exposed to the outside to the outside atmosphere with high efficiency.
- the left surface of the I-type magnetic core 21 and the right surface of the E-type magnetic core 22 are exposed to the outside.
- the uppermost surface of the I-type magnetic core 21 and the lowermost surface of the E-type magnetic core 22 are also exposed to the outside.
- at least a part of the surface of the magnetic cores 21 and 22 has a portion exposed to the outside. For this reason, both of the magnetic cores 21 and 22 can dissipate the generated heat from the exposed portion to the outside atmosphere with high efficiency.
- insulating members 61, 62, 63 are sandwiched between the first winding 11 and the second winding 12, and between the windings 11, 12 and the magnetic cores 21, 22. Arranged to be. For this reason, the electrical insulation state between the first winding 11 and the second winding 12 and the electrical insulation state between the windings 11 and 12 and the magnetic cores 21 and 22 are ensured. be able to.
- the power conversion device 100 is capable of reducing the size of the transformer 10, the insulation between the windings 11 and 12, and the high heat dissipation with respect to the heat generation of the windings 11 and 12 and the magnetic cores 21 and 22. Can be combined.
- an insulating member bent in an L shape between E-type magnetic core 22 and S-shaped second winding 12. 62 is sandwiched. Thereby, the E-type magnetic core 22 and the second winding 12 are electrically insulated from each other.
- An S-shaped insulating member 63 is sandwiched between the second winding 12 and the first winding 11, both of which have an S-shape, whereby the second winding 12 and the first winding 11 are sandwiched.
- the wires 11 are electrically insulated from each other.
- an insulating member 61 bent in an L shape is sandwiched between the S-shaped first winding 11 and the E-type magnetic core 22 or I-type magnetic core 21 directly above the windings 11 and 12 extending in the left-right direction in FIG.
- an insulating member 61 bent in an L shape is sandwiched.
- the first winding 11 and the magnetic cores 21 and 22 immediately above the first winding 11 are electrically insulated from each other. It is necessary between the members of the first winding 11, the second winding 12, the I-type magnetic core 21, and the E-type magnetic core 22 by controlling the materials and thicknesses of the insulating members 61, 62, and 63. High insulation performance can be satisfied.
- the insulation performance is defined as a withstand voltage at which a voltage of 2000 V can be applied for 1 minute as an insulation withstand voltage between the first winding 11 and the second winding 12, for example. Therefore, for example, when the insulating members 61, 62, 63 are made of a resin material having a withstand voltage characteristic of 10 kV / mm or more (particularly, insulation between the first winding 11 and the second winding 12). If the thickness of the member 63 is 0.2 mm or more, desired dielectric strength characteristics can be obtained.
- the heat dissipation of each component of the transformer 10 in this embodiment will be described.
- the heat generated by the first winding 11, the second winding 12, the I-type magnetic core 21, and the E-type magnetic core 22 is radiated to the atmosphere from the surface exposed to the outside. Therefore, for example, a region sandwiched between two members that generate heat has a surface that is not exposed to the outside, and heat dissipation is reduced.
- the first winding 11 is difficult to dissipate heat because the second portion is sandwiched between the I-type magnetic core 21 and the second winding 12.
- the surface of the first part is exposed to the outside and the heat dissipation from this part is high. Therefore, in particular, the first winding 11 can dissipate heat from the first portion with high efficiency.
- the second winding 12 is difficult to dissipate heat because the first portion is sandwiched between the E-type magnetic core 22 and the first winding 11, but the second portion is The surface is exposed to the outside and the heat dissipation from this part is high. Therefore, in particular, the second winding 12 can dissipate heat from the second portion with high efficiency. Therefore, both the first winding 11 and the second winding 12 have a region exposed to the outside where heat can be radiated with high efficiency, and both the windings 11 and 12 are good. It will have heat dissipation.
- Embodiment 2 FIG. A specific configuration of the power conversion device of the first example of the present embodiment will be described with reference to FIGS. 9 to 10.
- the power conversion device 200 of the first example of the present embodiment is different from the power conversion device 100 of the first embodiment in the printed circuit board 41, the casing 42, the side walls 43 and 44, and high heat dissipation. It is different in that it further has a conductive insulating member 64 and the like.
- the plurality of side walls 43 and 44 are arranged as a part of the casing 42.
- the casing 42 and the plurality of side walls 43 and 44 are integrally formed.
- the side wall 43 is formed in a columnar shape on the outer side (right side) of the magnetic cores 21 and 22 and the windings 11 and 12 in FIG. 9 and in the vertical direction (vertical direction) in FIG. It is an area
- the side wall 44 is located on the outer side (left side) of the magnetic cores 21 and 22 and the windings 11 and 12 in FIG. 9, as with the I-type magnetic core 21 and the E-type magnetic core 22. This is a region extending like a column.
- a dotted line in FIG. 9 is a boundary between the side walls 43 and 44 in the housing 42 and other regions.
- casing 42 can be formed so that it may become integral with the side walls 43 and 44, for example using die-casting made from aluminum.
- the printed circuit board 41 is a flat plate member serving as a base for mounting and mounting circuits and elements included in the entire power conversion apparatus 100. That is, the printed circuit board 41 is electrically connected to semiconductor elements such as switching elements 31A to 31D and rectifying elements 31E to 31H shown in FIG. Further, although not shown in FIG. 9, capacitors 32 ⁇ / b> A and 32 ⁇ / b> B and other electronic components shown in FIG. 1 are also electrically connected to the printed circuit board 41. More specifically, the switching elements 31A to 31D and the rectifying elements 31E to 31H are fixed to the casing 42 by screws 51 and are electrically connected to the printed circuit board 41 by wires 53. The printed circuit board 41 is fixed to the side wall 43, 44 of the housing 42, particularly in FIG. For this reason, the side walls 43 and 44 function as support columns for fixing the printed circuit board 41 to the housing 42 with the screws 52.
- the E-type magnetic core 22 is placed on a partial region of the housing 42, and the I-type magnetic core 21 is viewed from the E-type magnetic core 22 in plan view (see FIG. 9 (mode viewed from above 9).
- the portion of the casing 42 other than the side walls 43 and 44 functions as a radiator. That is, by placing the E-type magnetic core 22 or the like on a partial region of the casing 42, the E-type magnetic core 22 is one of the extending directions (vertical direction in FIG. 9) (the vertical direction in FIG. 9). It is arranged so as to contact the lower end surface. For example, when the lower region of the housing 42 is cooled by air cooling or water cooling, heat generated by the components of the transformer 10 and the switching elements 31A to 31D with which the housing 42 contacts can be radiated to the outside with high efficiency.
- the plurality of side walls 43 and 44 are formed integrally with the casing 42.
- the side walls 43 and 44 are basically made of metal such as aluminum and have heat dissipation properties.
- the first portion is arranged on the left side of the E-type magnetic core 22 in FIG. 9, and the second portion is arranged on the right side of the E-type magnetic core 22 and the I-type magnetic core 21 in FIG. . Further, in both the first winding 11 and the second winding 12, the second portion penetrates the printed board 41 to electrically connect with the printed board 41 (electrode pad (not shown) formed on the printed board 41). It is connected.
- the first portion of the first winding 11 is more bent than the first portion of the second winding 12 by being bent so as to have an S shape. Is also arranged outside the magnetic cores 21 and 22. The second portion of the second winding 12 is disposed on the outer side with respect to the magnetic cores 21 and 22 than the second portion of the first winding 11.
- the magnetic cores 21 and 22 around which the first winding 11 and the second winding 12 are wound are located in a region sandwiched between a pair of side walls 43 and 44 as a support on the casing 42. It is placed.
- a plurality of windings (the first winding 11 and the second winding 11 are in contact with each of the plurality of side walls 43 and 44 and each of the first winding 11 and the second winding 12.
- a high heat dissipation insulating member 64 is disposed outside the winding 12).
- regions disposed outside each other (the first portion of the first winding 11 and the second portion of the second winding 12). ) Is in contact with the outer high heat dissipation insulating member 64.
- the high heat dissipation insulating member 64 includes the I-type magnetic core 21, the E-type magnetic core 22 (above the region where the first winding 11 and the second winding 12 extend horizontally), and the left side wall 44. And in the region between the E-type magnetic core 22 and the right side wall 43 (below the region where the first winding 11 and the second winding 12 extend horizontally). Has been. That is, the high heat dissipation insulating member 64 is disposed so as to be sandwiched between the side walls 43 and 44 and at least a part of both the magnetic cores 21 and 22.
- the high heat dissipation insulating member 64 includes a region between the first portion of the first winding 11 and the outside thereof, that is, the left side wall 44, and a second portion of the second winding 12 and the outside thereof. It is arranged in a region between the right side wall 43. In other words, the high heat dissipation insulating member 64 is disposed so as to be sandwiched between the side walls 43 and 44 and the windings 11 and 12 so as to be in contact with at least a part thereof.
- each of the plurality of windings 11 and 12 is in contact with the casing 42 (side walls 43 and 44) serving as a radiator via the high heat dissipation insulating member 64.
- the region disposed on the outermost side of the first winding 11 is the first portion
- the region disposed on the outermost side of the second winding 12 is the second portion. is there.
- the high heat dissipation insulating member 64 is disposed only outside the first winding 11, the second winding 12, and the magnetic cores 21 and 22.
- the outer sides of the first winding 11 and the second winding 12 are the positions where the positions (coordinates) in the vertical direction of FIG.
- the high heat-dissipating insulating member 64 is arranged at a position outside the first and second windings 11 and 12 with respect to the magnetic cores 21 and 22.
- the high heat dissipation insulating member 64 may be disposed slightly inside the first winding 11 and the second winding 12.
- the high heat radiation insulating member 64 is disposed inside the first winding 11 and the second winding 12.
- the two first windings 11 and the second winding 12 having the first and second bent portions are arranged so as to be in contact with the high heat dissipation insulating member 64 in a part of each. Yes. That is, the first winding 11 is disposed so that the first portion thereof is in contact with the second winding 12 and the second portion thereof is in contact with the high heat dissipation insulating member 64.
- the high heat dissipation insulating member 64 has a higher thermal conductivity than the insulating members 61, 62, 63. Specifically, for example, when the above resin material is used as the insulating members 61, 62, 63, the thermal conductivity is generally set to 0.3 W / mK or less.
- the high heat dissipation insulating member 64 has a higher thermal conductivity, and preferably has a thermal conductivity of 0.5 W / mK or more.
- the high heat dissipation insulating member 64 is preferably formed of a material having fluidity that can be supplied so as to fill a gap between the first winding 11 and the side wall 43 in addition to high insulation performance. That is, the high heat dissipation insulating member 64 is preferably formed of a composition in which an epoxy resin or silicone resin satisfying the above thermal conductivity, insulating properties and fluidity is mixed with an insulating filler.
- FIG. 10 a pair of side walls 43, 44 facing each other are placed on a housing 42 (an area other than the side walls 43, 44), and these side walls 43, 44 and the side walls in plan view
- a pair of other wall surfaces facing each other extending in a direction orthogonal to 43 and 44 is formed as a region surrounding the cores 21 and 22 described later from four directions.
- the region surrounded from the four sides and the casing 42 (region other than the side wall thereof) are formed so as to be integrated.
- the E-type magnetic core 22 is placed in a region surrounded from four sides by the wall surface including the side walls 43 and 44.
- the E-type magnetic core 22 is preferably placed so that the core connecting portion 22D is the lowermost portion, and the outer legs 22A, 22B and the middle legs 22C are projected on the upper side.
- the member 61 is laminated in this order. Also here, the middle foot 22C penetrates the openings 62C, 12C, 63C, 11C, 61C.
- the flat rectangular I-type magnetic core 21 is placed so as to straddle the outer legs 22A and 22B and the middle leg 22C of the E-type magnetic core 22 from above the insulating member 61.
- a high heat dissipation insulating member 64 as a material satisfying the above high thermal conductivity, insulation and fluidity is supplied into a region surrounded by the wall including the side walls 43 and 44 from all sides. As a result, the gap in the region surrounded by the four sides is filled with the high heat dissipation insulating member 64, and the mode shown in FIG. 9 is obtained.
- the printed circuit board 41 shown in FIG. 9 is fixed to the side walls 43 and 44 by screws 52.
- the first winding 11 penetrates the printed circuit board 41 and is drawn upward, and the drawing portion 13 is drawn.
- the second winding 12 penetrates the printed circuit board 41 and is drawn upward, so that the drawing portion is drawn. 14 are formed respectively.
- the lead portions 13 and 14 are fixed to the printed circuit board 41 by generally known soldering or the like.
- the wiring 53 extending from the switching elements 31A to 31D etc. penetrates the printed circuit board 41 and is fixed to the printed circuit board 41 by soldering or the like.
- the power conversion device 200 of the first example of the present embodiment is different from the power conversion device 100 of the first embodiment.
- Other configurations of the present embodiment are the same as those of the first embodiment. The configuration is almost the same. For this reason, the same code
- the first winding 11 and the second winding 12 in the first embodiment are arranged on the outer side (more than the other winding) with respect to the magnetic cores 21 and 22 and exposed to the outside.
- the portion (the region arranged on the outermost side) is in contact with the casing 42 (side walls 43, 44) as a radiator via the high heat dissipation insulating member 64.
- the heat generated in the windings 11 and 12 can be radiated from the high heat dissipation insulating member 64 to the side walls 43 and 44 with high efficiency. Since the side walls 43 and 44 are formed integrally with the housing 42, the side walls 43 and 44 function as a heat radiator in the same manner as the housing 42.
- the high heat dissipation insulating member 64 is disposed only on the outside of the windings 11 and 12, and both of the windings 11 and 12 are at least a part thereof (the first disposed on the outside of the other windings 12 and 11. 1 or the second portion) is disposed so as to be in contact with the high heat dissipation insulating member 64.
- this Embodiment has the structure by which the coil
- the heat generated in the windings 11 and 12 can be radiated from the high heat dissipation insulating member 64 to the side walls 43 and 44 with high efficiency.
- the high heat dissipation insulating member 64 is disposed only outside the windings 11 and 12, for example, the first and second portions. That is, the high heat dissipation insulating member 64 is disposed only outside the first portion of the windings 11 and 12 with respect to the cores 21 and 22, for example, inside the first portion of the windings 11 and 12 (cores 21 and 22. The high heat-dissipating insulating member 64 is not disposed on the side). Similarly, the high heat-dissipating insulating member 64 is disposed only outside the second portions of the windings 11 and 12. Thereby, the manufacturing cost by the material cost of the high heat dissipation insulating member 64 can be reduced compared with the case where the high heat dissipation insulating member 64 is also arranged inside the first and second portions.
- the E-type magnetic core 22 is arranged so that one end (lower side) of the extending direction is in contact with the casing 42 as a radiator. For this reason, since part of the E-type magnetic core 22 is in direct contact with the casing 42, the heat dissipation efficiency from the E-type magnetic core 22 to the casing 42 is improved. Part of the I-type magnetic core 21 and the E-type magnetic core 22 is connected to the side walls 43 and 44 with the high heat dissipation insulating member 64 interposed therebetween. Therefore, part of the heat generated by the magnetic cores 21 and 22 can be quickly radiated to the side walls 43 and 44 via the high heat radiating insulating member 64.
- the side walls 43 and 44 are formed integrally with the housing 42. For this reason, the heat conduction from the side walls 43 and 44 to the housing 42 becomes easier, and the heat dissipation of the windings 11 and 12 can be further improved.
- the power conversion devices 100 and 101 reduce the size of the transformer 10, insulation between the windings 11 and 12, and high heat dissipation against heat generation of the windings 11 and 12 and the magnetic cores 21 and 22. It can combine with sex.
- the lower end of the E-type magnetic core 22 is in contact with the casing 42 and has the same potential as the casing 42. Also in the present embodiment, the first winding 11, the second winding 12, the I-type magnetic core 21, and the E-type magnetic core 22 are insulated by the insulating members 61, 62, and 63 as in the first embodiment. Necessary insulation performance can be satisfied between the members.
- the leftmost end portion 61 ⁇ / b> A of the insulating member 61 extending in the left-right direction in the drawing is formed to extend to the left side in FIG. 9 from the first portion of the first winding 11. Yes.
- the rightmost end 62A of the insulating member 62 extending in the left-right direction in the drawing is formed to extend to the right in FIG. 9 rather than the second portion of the second winding 12.
- the lowermost end 62A of the insulating member 62 extending in the vertical direction in the figure is formed so as to extend below the lowermost part of the first portion of the second winding 12 in FIG.
- the lowermost end portion 63A of the insulating member 63 extending in the vertical direction in the figure is formed so as to extend below the lowermost portion of the first portion of the second winding 12 in FIG.
- This gap is a material with excellent fluidity that constitutes the high heat dissipation insulating member 64 after each member such as the windings 11 and 12 constituting the transformer 10 is put in the region surrounded by the side walls 43 and 44. It is filled by supply.
- the high heat dissipation insulating member 64 has insulation properties as well as heat dissipation properties, for example, a region between the first winding 11 and the side wall 44 between which the high heat dissipation insulating member 64 is sandwiched ensures high heat insulation properties and high electrical insulation properties. be able to.
- the thickness of the high heat dissipation insulating member 64 supplied to this gap is substantially equal to the dimension along the direction in which the end portions 61A, 62A, 63A extend in FIG.
- the thickness of the high heat dissipation insulating member 64 can be controlled, and the insulating property by the high heat dissipation insulating member 64 can be controlled.
- the E-type magnetic core 22 has a path for radiating heat directly from the lower surface in contact with the casing 42 to the casing 42 and a path for radiating heat to the side wall 43 via the high heat dissipation insulating member 64.
- the I-type magnetic core 21 has a path for radiating heat to the side wall 44 via the high heat dissipation insulating member 64. Heat generation of the I-type magnetic core 21 and the E-type magnetic core 22 constituting the magnetic component is proportional to the volume.
- the I type magnetic core 21 having only one heat dissipation path is an I type core
- the E type magnetic core 22 having two heat dissipation paths is an E type core, so that there are two heat dissipation paths.
- the volume of the E-type magnetic core 22 can be made larger than the volume of the I-type magnetic core 21 having only one heat dissipation path.
- the first winding 11 is radiated from the first part at the lower left of FIG. 9 to the side wall 44 through the high heat dissipation insulating member 64, and the second winding 12 is the second part at the upper right of FIG. Then, heat is radiated to the side wall 43 through the high heat dissipation insulating member 64.
- the side wall 43 is relatively long in the vertical direction in FIG. For this reason, for example, from the viewpoint of further increasing the efficiency of dissipating heat generated from the second portion of the second winding 12 more preferentially from the side wall 43, the side wall 43 is particularly downward (winding extending in the left-right direction in FIG. 9).
- the width in the left-right direction of the figure may be wider than the upper side.
- the side wall 44 in FIG. 9 is not configured as described above. In this way, it is possible to further increase the efficiency of dissipating the heat of the second winding 12 from the second portion so as to reach the lower housing 42 via the side wall 43.
- the insulating members 61, 62, and 63 have lower heat dissipation (thermal conductivity) than the high heat dissipation insulating member 64.
- the insulating members 61, 62, and 63 are not required to have a high heat dissipation property unlike the high heat dissipation insulating member 64, so that the degree of freedom in selecting the material can be increased. Therefore, the insulating members 61, 62, and 63 can be formed of a material that is lower in cost than the high heat dissipation insulating member 64, and the cost of the entire power conversion device 200 can be reduced.
- a device for improving the adhesion between the insulating members 61, 62, 63 and the windings 11, 12, and the magnetic cores 21, 22 is always required. This eliminates the need to use an adhesive or the like for bringing the two into close contact.
- power converter 201 of the second example of the present embodiment basically has the same configuration as power converter 200 of the first example.
- the casing 42 and the side walls 43 and 44 are not integrated, and they are separate from each other. That is, the housing 42 as a radiator is disposed only in the region disposed below the E-type magnetic core 22 in FIG.
- each of the side walls 43 and 44 extending in the vertical direction in FIG. 11 is disposed so that one (lower) end surface in the extending direction is in contact with the side walls 43 and 44.
- the side walls 43 and 44 on the housing 42 are fixed on the top surface of the housing 42 by screws 51.
- the side wall 43 is wider in the horizontal direction in the drawing than the other regions, particularly in the lower region of FIG. 11 than the region in contact with the high heat dissipation insulating member 64.
- the width of the lower region of FIG. 11 is wider in the horizontal direction in the drawing than the other regions, particularly in the lower region of FIG. 11 than the region in contact with the high heat dissipation insulating member 64.
- the housing 42 as a radiator is disposed so as to contact one end surface (lower side) in the vertical direction of FIG. 11 in which the E-type magnetic core 22 and the side walls 43 and 44 extend.
- the side walls 43 and 44 extend in the direction (vertical direction in FIG. 11) that intersects the extending direction (vertical direction) in the portion in contact with the lowermost casing 42 as compared with the region other than the lowermost part. Joints 43C and 44C.
- an insulating member sheet 66 as a high heat dissipation insulating member is disposed.
- An insulating member sheet 66 as a high heat dissipation insulating member is disposed in a region between the two. In other words, in the second example, the insulating member sheet disposed outside the plurality of windings 11 and 12 so as to be in contact with both the plurality of side walls 43 and 44 and each of the plurality of windings 11 and 12. 66.
- the insulating member sheet 66 is a soft sheet type member having a higher thermal conductivity than the insulating members 61, 62, and 63.
- a high heat-dissipating insulating member 64 is disposed on the surface.
- high heat dissipation is also provided in a region sandwiched between a part of the E-type magnetic core 22 and the side wall 43.
- An insulating member 64 is disposed.
- neither the high heat dissipation insulating member 64 nor the insulating member sheet 66 is disposed in these regions, and a gap is formed.
- the power conversion device 201 of the second example is different from the power conversion device 200 of the first example, but the configuration of the second example other than this is substantially the same as the configuration of the first example. For this reason, the same code
- the E-type magnetic core 22 is partly on the top surface of the housing 42, the core connecting part 22D is the bottom part, and the outer legs 22A and 22B and the middle leg 22C project on the upper side. Is placed as follows.
- the desired first and second bent portions for example, the alternate long and short dash line F1 and the dotted line F2 are bent in advance so as to form a so-called S shape
- the insulating member 62, the second winding 12, the insulating member 63, the first winding 11 and the insulating member 61 are laminated in this order so as to be wound outward.
- the middle foot 22C penetrates each of the openings 62C, 12C, 63C, 11C, 61C.
- the flat rectangular I-type magnetic core 21 is placed so as to straddle the outer legs 22A and 22B and the middle leg 22C of the E-type magnetic core 22 from above the insulating member 61.
- an insulating member sheet is formed on a part of one surface (the inner surface after being finally set) (the side wall 44 is a lower region and the side wall 43 is an upper region).
- the side walls 44 and 43 to which 66 is affixed are fixed to a part on the uppermost surface of the housing 42 by screws 51 (see FIG. 11).
- the insulating member sheet 66 is indicated by an arrow in the drawing on the surface of the first portion of the first winding 11 placed in advance and on the surface of the second portion of the second winding 12.
- the side walls 43 and 44 are fixed to the housing 42 so as to be pressed and contacted in the direction.
- the material constituting the insulating member sheet 66 is a sheet-like member having a high thermal conductivity (more than the insulating members 61, 62, and 63) and is selected according to the characteristics of thermal conductivity and dielectric strength voltage.
- the insulating member sheet 66 is formed of a low-altitude heat radiation silicone rubber having a thermal conductivity of 1.8 W / mK or more and a withstand voltage of 22 kV / mm or more.
- the insulating member sheet 66 may be formed of a heat radiating spacer having a thermal conductivity of 1 W / mK or more and a withstand voltage of 10 kV / mm or more, for example.
- the printed circuit board 41 is placed on the upper surfaces of the side walls 44 and 43 and fixed by screws 52 (see FIG. 11). At this time, it is preferable that the uppermost portions of the first winding 11 and the second winding 12 pass through the printed circuit board 41 and protrude above the printed circuit board 41 as lead-out portions 13 and 14.
- the first part (lower left) of the first winding 11 and the second part (upper right part) of the second winding 12 Extend in a direction substantially perpendicular to the main surface of the housing 42 (in the vertical direction in FIG. 12).
- the first portion of the first winding 11 (lower left portion) and the second portion of the second winding 12 (upper right portion) Is applied to the main surface of the housing 42 in an oblique direction (inclined toward the opposing side walls 43 and 44), and then the side walls 43 and 44 are pressed so that the windings 11 and 12 extend in the vertical direction. May be used.
- the windings 11 and 12 are bent as in the first example, and the insulating member 63 is disposed between the windings 11 and 12.
- the transformer can be reduced in size, insulative, and heat-radiating.
- the side walls 43, 44 are separate from the housing 42, but at the lowermost part of the side walls 43, 44, the joints 43 ⁇ / b> C that extend in the left-right direction in FIG. 44C.
- fever of the side walls 43 and 44 can be efficiently transmitted to the housing
- the high heat dissipation insulating member 64 and the high heat dissipation insulating member sheet 66 are not disposed between the I-type magnetic core 21 and the E-type magnetic core 22 and the side walls 43 and 44, and a gap is formed.
- both the windings 11 and 12 are in contact with the side walls 43 and 44 through the insulating member sheet 66 in order to preferentially dissipate the windings 11 and 12 with priority.
- the amount of the high heat dissipation insulating member 64 or the insulating member sheet 66 having high heat dissipation can be reduced, so that the manufacturing cost can be reduced.
- the leftmost end 61 ⁇ / b> A of the insulating member 61 extending in the left-right direction in the drawing extends to the left in FIG. 11 rather than the first portion of the first winding 11. It is formed as follows. Further, the rightmost end 62A of the insulating member 62 extending in the left-right direction in the drawing is formed to extend to the right in FIG. 11 rather than the second portion of the second winding 12. Further, the lowermost end portion 62A of the insulating member 62 extending in the vertical direction in the figure is formed so as to extend below the first portion of the second winding 12 in FIG.
- the lowermost end portion 63A of the insulating member 63 extending in the vertical direction in the figure is formed so as to extend below the first portion of the second winding 12 in FIG. Gaps are formed between the end portions 61A, 62A, and 63A and the windings 11 and 12 adjacent to them.
- the gap is filled with the high heat dissipation insulating member 64, whereas in the second example, nothing is supplied to the gap, and the insulation performance is satisfied by the distance of the gap.
- an insulating member sheet Between the first portion (lower left side) of the first winding 11 and the side wall 44 and between the second portion (upper right side) of the second winding 12 and the side wall 43, there is an insulating member sheet. 66 is sandwiched. The insulating member sheet 66 contacts both the first winding 11 and the side wall 44 to insulate the first winding 11 from the side wall 44. The insulating member sheet 66 is in contact with both the second winding 12 and the side wall 43 to insulate the second winding 12 from the side wall 43.
- the leftmost end 61 ⁇ / b> A of the insulating member 61 extending in the left-right direction in the drawing is formed to extend to the left in FIG. 11 from the first portion of the first winding 11. . Therefore, by pressing the side wall 44 on which the insulating member sheet 66 is formed against the first portion of the first winding 11, the side wall 44 contacts the end portion 61A of the insulating member 61, and the length of the end portion 61A. Only the thickness of the insulating member sheet 66 can be secured.
- the rightmost end 62A of the insulating member 62 extending in the left-right direction in the drawing is formed to extend to the right in FIG. 11 rather than the second portion of the second winding 12. Therefore, by pressing the side wall 43 on which the insulating member sheet 66 is formed against the second portion of the second winding 12, the side wall 43 comes into contact with the end portion 62A of the insulating member 62, and the length of the end portion 62A. Only the thickness of the insulating member sheet 66 can be secured.
- the gap between the casing 42 and the side walls 43 and 44 and each component of the transformer 10 is filled with a high heat dissipation insulating member 64.
- the E-type magnetic core 22 and the I-type magnetic core 21 have a path for radiating heat to the side walls 43 and 44 via the high heat dissipation insulating member 64.
- a high heat dissipation insulating member 64 is provided between the E type magnetic core 22 and the side wall 43 and between the I type magnetic core 21 or the E type magnetic core 22 and the side wall 44. A gap is formed in the region without being filled. For this reason, in the 2nd example, the heat dissipation of the magnetic cores 21 and 22 is inferior compared with the 1st example.
- the side walls 43 and 44 are separate from the casing 42, and both are joined to each other by heat radiation grease 43 ⁇ / b> A and 44 ⁇ / b> A.
- the heat radiation grease 43A, 44A is preferably supplied by coating, for example, at a portion where the lowermost portions of the joint portions 43C, 44C where the widths of the side walls 43, 44 are widened and the housing 42 are joined.
- 43 and 44 can also be directly cooled (air cooled).
- Embodiment 3 A specific configuration of the power conversion apparatus according to the present embodiment will be described with reference to FIGS.
- the power conversion device 300 of the present embodiment is different from the power conversion devices of the first and second embodiments in the first winding 11, the second winding 12, the insulating member 61, 62 and 63 are bent in different shapes and arrangements. Specifically, the direction in which the bent windings 11, 12 and the like extend on one side and the other end side in the cross-sectional view of FIG. 13 is different from that of the first embodiment.
- a region between each of the winding portions 11 and the second winding portion 12 (first bent portion) is defined as a first portion.
- a region between the first winding 11 and the second winding 12 on the right side of each of the first winding 11 and the second winding 12 is defined as a second portion.
- the first bent portion corresponds to the alternate long and short dash line F2 on the left side of the magnetic core 22 in FIGS. 14A and 14B
- the second bent portion corresponds to FIGS. 14A and 14B. This corresponds to the one-dot chain line F2 on the right side of the magnetic core 22 in FIG.
- the first portion from the first bent portion of the first winding 11 and the second portion from the second bent portion are both illustrated. 13 extends upward. Further, the first portion from the first bent portion of the second winding 12 and the second portion from the second bent portion both extend downward in FIG. That is, the first part and the second part extend in the same direction. Thus, in FIG. 13, each of the two first windings 11 and the second winding 12 is bent so as to have a so-called C-shape. As in the other embodiments, the extending direction of the first and second portions is along the extending direction of the I-type magnetic core 21 and the E-type magnetic core 22 (vertical direction in FIG. 13).
- both the first winding 11 and the second winding 12 have a portion sandwiched between the first and second portions (a region between the first bent portion and the second bent portion). This is the third part.
- the third portion of the first winding 11 and the third portion of the second winding 12 are superposed in the vertical direction of FIG.
- the first portion of the first winding 11 and the first portion of the second winding 12 are arranged on the same plane extending in the vertical direction in FIG.
- the second portion of the first winding 11 and the second portion of the second winding 12 are arranged on the same plane extending in the vertical direction in FIG.
- the uppermost portion 11E3 of the first winding 11 in the sectional view as shown in FIG. 13 when viewed along the extending direction of the magnetic cores 21 and 22 (vertical direction in FIG. 13) is one end portion.
- the uppermost part 11E4 is defined as the other end.
- the bent portion on the side close to the uppermost portion 11E3 of the first winding 11 is defined as the first bent portion 11T3
- the bent portion on the side closer to the uppermost portion 11E4 is defined as the second bent portion 11T4.
- a region between the uppermost part 11E3 and the first bent part 11T3 is a first part
- an area between the second bent part 11T4 and the uppermost part 11E4 is a second part.
- the lowermost portion 12E3 of the second winding 12 in the cross-sectional view as shown in FIG. 13 when viewed along the extending direction of the magnetic cores 21 and 22 (vertical direction in FIG. 13) is one end.
- the lowermost part 12E4 are defined as the other end.
- the bent portion on the side close to the lowermost portion 12E3 of the second winding 12 is defined as the first bent portion 12T3
- the bent portion on the side closer to the lowermost portion 12E4 is defined as the second bent portion 12T4.
- a region between the lowermost portion 12E3 and the first bent portion 12T3 is a first portion
- a region between the second bent portion 12T4 and the lowermost portion 12E4 is a second portion.
- the third portion of the windings 11 and 12 that is, the portion substantially overlapping with the magnetic cores 21 and 22, is formed by the plane formed by the first winding 11 and the second winding 12 (each turn of each winding). Planes) almost overlap each other.
- the planes formed by the first winding 11 and the second winding 12 are arranged on the same plane, but these planes do not overlap each other. Not in. That is, in the cross-sectional view of FIG. 13, the first winding 11 and the second winding 12 are overlapped so as to be back to back in each third portion.
- the planes formed by the respective turns of the first winding 11 and the second winding 12 have a region where they do not partially overlap.
- the present embodiment is the first and second embodiments in which the planes formed by the turns of the first winding 11 and the second winding 12 are bent so that they almost overlap each other. Is different.
- the first winding 11 and the second winding 12 of the first and second embodiments constitute the transformer 10 (primary winding 15 and secondary winding 16) of FIG.
- the input side drive circuit 1 and the output are larger when the areas of the portions where the planes of the first winding 11 and the second winding 12 overlap (oppose) each other are larger. A reduction in the efficiency of power conversion with the side drive circuit 2 is suppressed.
- the first winding 11 and the second winding 12 coils different from the primary winding 15 and the secondary winding 16 of the transformer 10 in FIG. 1 are assumed. Yes.
- the first winding 11 and the second winding 12 are opposed to each other over a wide range, a parasitic capacitor is generated between the windings 11 and 12, and therefore it is preferable to reduce the area where the two are opposed to each other. Therefore, as described above, in the first and second portions of the windings 11 and 12, the planes formed by the first winding 11 and the second winding 12 are arranged on the same plane. The planes do not overlap each other.
- the positions where the insulating members 61, 62, 63 are arranged are basically the same as those in the first embodiment. That is, the insulating member 63 is provided in a region sandwiched between the first winding 11 and the second winding 12. An insulating member 61 is disposed between the first winding 11 and the magnetic core (I-type magnetic core 21 and E-type magnetic core 22), and the second winding 12 and the magnetic core (E-type magnetic core). An insulating member 62 is arranged between the core 22). Therefore, the insulating member 62, the second winding 12, the insulating member 63, and the first member are wound around the middle leg 22 ⁇ / b> C (see FIG. 4C) of the E-type magnetic core 22 (E-type core).
- Winding 11 and insulating member 61 are laminated in this order.
- the insulating member 63 has only a portion extending in the left-right direction in the cross-sectional view of FIG. 13 and is not bent.
- the insulating member 61 is bent so as to be C-shaped in the cross-sectional view of FIG. 13, similarly to the second winding 12.
- FIG. 2 and FIGS. 3A and 3B are the same as the winding mode of the first embodiment.
- the direction in which the first winding 11 and the second winding 12 are bent at the first and second bent portions is different from that in the first embodiment.
- the first winding 11 and the second winding 12 shown in FIG. 14 are bent toward the back of the page along the alternate long and short dash line F1 in FIG. 14, and toward the front of the page at the dotted line F2 in FIG.
- the first and second portions of the windings 11 and 12 extend in the same direction (become C-shaped).
- both of the drawing portion 13 and the drawing portion 14 extend upward in FIG. 13, for example, and can be drawn toward the upper side of the printed board (not shown).
- the insulating member 65 so as to be able to intersect without short-circuiting the first winding 11 and the second winding 12 extending so as to wind around the middle leg 22C. Is provided.
- the power conversion device 300 of the present embodiment is different from the power conversion device 100 of the first embodiment, but the other configurations of the present embodiment are substantially the same as the configurations of the first embodiment. The same. For this reason, the same code
- a plurality of windings that is, first winding 11 and second winding 12 are bent so as to have a C shape. Also in this case, the first portion extending from the first bent portion and the second portion extending from the second bent portion are formed in the same manner as in the case of being bent into an S shape like the power conversion device 100.
- the transformer 10 can be reduced in size so as to extend along the direction in which the magnetic cores 21 and 22 extend. That is, the entire power conversion device 300 including the first winding 11 and the second winding 12 is downsized to the same extent as a structure in which the I-type magnetic core 21 and the E-type magnetic core 22 are superimposed. be able to.
- both the first winding 11 and the second winding 12 are disposed outside the magnetic cores 21 and 22 in the windings 11 and 12. Is bent to include. Specifically, as described above, both the first winding 11 and the second winding 12 have the first portion and the second portion arranged outside the magnetic cores 21 and 22 and exposed to the outside. is doing. Therefore, both of the windings 11 and 12 can radiate the generated heat from the portion exposed to the outside to the outside atmosphere with high efficiency.
- the first portion of the first winding 11 and the first portion of the second winding 12 are aligned on the same plane, and the second portion of the first winding 11 and the second winding 12 are aligned. Since the second portion of the first winding 11 and the second winding 12 are arranged on the same plane, the insulating member sheet 66 is connected to the first portion of the first winding 11 and the second portion of the second winding 12, for example, as in the embodiment described later. It becomes easy to make it contact with both of 1 part.
- FIG. 13 as shown in FIG. 2 and the like, it overlaps with the first portion of the first winding 11 (at a position where the position (coordinates) in the vertical direction is the same as that of the first winding 11 in FIG.
- the second winding 12 is not arranged.
- “out of all the plurality of windings” is arranged on the outermost side with respect to the magnetic core.
- the regions extending in the vertical direction of the first winding 11 and the second winding 12 are both arranged at the same position (coordinates) with respect to the magnetic cores 21 and 22 (with respect to the horizontal direction in FIG. 13).
- the windings 11 and 12 do not exist outside the windings 11 and 12. For this reason, it can be said that both the first winding 11 and the second winding 12 are arranged on the outermost side with respect to the magnetic cores 21 and 22.
- the insulating members 61, 62, 63 are sandwiched between the first winding 11 and the second winding 12, and between the windings 11, 12 and the magnetic cores 21, 22. Arranged to be. For this reason, the electrical insulation state between the first winding 11 and the second winding 12 and the electrical insulation state between the windings 11 and 12 and the magnetic cores 21 and 22 are ensured. be able to.
- the power conversion device 100 is capable of reducing the size of the transformer 10, the insulation between the windings 11 and 12, and the high heat dissipation with respect to the heat generation of the windings 11 and 12 and the magnetic cores 21 and 22. Can be combined.
- the windings are insulated by the insulating members 61, 62, 63.
- the uppermost end portion 61 ⁇ / b> A of the insulating member 61 on the left side of the magnetic cores 21, 22 is from the first portion of the first winding 11. Also, it may be formed to extend upward in FIG. Further, for example, the lowermost end 62A of the insulating member 62 on the left side of the magnetic cores 21 and 22 is formed so as to extend below the first part of the second winding 12 in FIG. Also good.
- the leftmost end 63A of the insulating member 63 may be formed so as to extend to the left in FIG. 13 rather than the first portions of the first winding 11 and the second winding 12. Thereby, the insulation performance required between each member of the 1st coil
- first winding 11 and second winding 12 the surfaces of the first and second portions are arranged on the outermost sides between the members. , Exposed to the outside. Therefore, both of the windings 11 and 12 can radiate the generated heat from the portion exposed to the outside to the outside atmosphere with high efficiency.
- the uppermost surface of the I-type magnetic core 21 and the lowermost surface of the E-type magnetic core 22 are also exposed to the outside. For this reason, both the magnetic cores 21 and 22 can radiate the heat generated from the exposed portion to the outside atmosphere with high efficiency.
- Embodiment 4 FIG. With reference to FIG. 16, the specific structure of the power converter device of the 1st example of this Embodiment is demonstrated.
- the power conversion device 400 of the first example of the present embodiment includes a housing 42, side walls 43, 44, an insulating member sheet 66, and the like with respect to the power conversion device 300 of the third embodiment. Furthermore, it has a different point.
- the shape and the like of the housing 42 and the side walls 43 and 44 in FIG. 16 are basically the same as the shape of the housing 42 and the side walls 43 and 44 in the power conversion device 201 of FIG. is there.
- the housing 42 and the side walls 43 and 44 may be integrated as in the power conversion device 200 of FIG.
- the screws and the heat radiation grease for joining the side walls 43 and 44 and the housing 42 to each other are omitted, but they are joined to each other by the screws 51 and the heat radiation grease 43A and 44A as in FIG. It may be.
- the assembly method of the magnetic cores 21 and 22, the windings 11 and 12, and the insulating members 61, 62, and 63 in the first example of the present embodiment is basically the same as that of the third embodiment.
- the method of assembling these with the casing 42 and the side walls 43 and 44 is basically the same as the second example of the second embodiment. Therefore, description of the assembly method is omitted here.
- both the first winding 11 and the second winding 12 are configured such that both the first portion and the second portion face outward with respect to the magnetic cores 21 and 22. It has become. For this reason, from the viewpoint of enabling contact with the portions facing the outside of the windings 11 and 12, the upper and lower sides (more than the windings 11 and 12 extending in the left-right direction) of the inner surfaces of the side walls 43 and 44, respectively.
- the insulating member sheet 66 is affixed to both areas.
- the first and second portions of the first winding 11 and the second winding 12 are sandwiched so as to contact both the insulating member sheet 66 and the insulating members 61 and 62.
- the material of the insulating member sheet 66 is the same as that in the second embodiment.
- the power conversion device 400 of the first example of the present embodiment is different from the power conversion devices 201 and 300 of the second and third embodiments.
- Other configurations of the present embodiment are as follows. The configuration is almost the same as in the second and third embodiments. For this reason, the same code
- the effect of the power converter device of the 1st example of this Embodiment is demonstrated.
- the first example of the present embodiment there are portions corresponding to the first and second portions of the first winding 11 and the second winding 12 exposed to the outside in the third embodiment.
- the insulating member sheet 66 having high heat dissipation attached to the side walls 43 and 44 is in contact with the insulating member sheet 66.
- the first and second portions of the first winding 11 and the second winding 12 are brought into contact with the casing 42 (side walls 43 and 44) as a radiator through the insulating member sheet 66. Yes.
- the first portion of the first winding 11 and the first portion of the second winding 12 are arranged on the same plane, and the first portion This can be easily realized by arranging the second portion of the winding 11 and the second portion of the second winding 12 on the same plane.
- the insulating member sheet 66 in contact with the first portion of the first winding 11 and the insulating member sheet 66 in contact with the first portion of the second winding 12 are on the same plane (on the inner surface of the side wall 44). This is because it can be formed.
- the heat generated by the magnetic cores 21 and 22 is radiated to the casing 42 with high efficiency.
- the power conversion device 400 that has all of downsizing, insulation, and heat dissipation.
- the power conversion device 401 of the second example of the present embodiment basically has the same configuration as the power conversion device 400 of the first example.
- the surfaces of the windings 11 and 12 opposite to the side in contact with the insulating member sheet 66 are in contact with the insulating member sheet 67.
- the power conversion device 401 is an insulating member in which the surfaces of the windings 11 and 12 opposite to the side in contact with the insulating member sheet 66 (the magnetic cores 21 and 22 side, that is, the inner side) have a C shape.
- 61 and 62 is structurally different from the power conversion device 400 that is in contact with a part of the power converter 61.
- the insulating member sheet 67 (winding) is provided in the region between the first and second portions of the windings 11 and 12 and the magnetic cores 21 and 22 instead of the insulating members 61 and 62. 11 and 12 and the magnetic cores 21 and 22). Therefore, the insulating members 61 and 62 do not have a bent C-shape, and have only a portion extending in the left-right direction in FIG.
- the insulating member sheet 67 is made of the same material as the insulating member sheet 66. That is, the insulating member sheet 67 is a soft sheet-type member that is arranged as a high heat dissipation insulating member like the insulating member sheet 66 and has a higher thermal conductivity than the insulating members 61, 62, and 63.
- the power conversion device 401 of the second example is different from the power conversion device 400 of the first example, but the configuration of the second example other than this is substantially the same as the configuration of the first example. For this reason, the same code
- the length of the portion extending in the left-right direction of the first winding 11 and the second winding 12 is longer than the length in the left-right direction of the insulating members 61, 62. Is formed longer. Thereby, the thickness (in the left-right direction in FIG. 17) of the insulating member sheet 67 can be ensured, and the insulation can be ensured.
- the heat generation of the I-type magnetic core 21 can be dissipated well only from the uppermost surface exposed to the outside.
- a part of the surface of the I-type magnetic core 21 is in contact with the insulating member sheet 67, and the insulating member sheet 67 includes the first and second windings 11 and 12.
- the first portion is in contact with the second portion, and the first and second portions are in contact with the insulating member sheet 66. Further, the insulating member sheet 66 is in contact with the side walls 43 and 44.
- the I-type magnetic core 21 of the power conversion device 401 has a good heat dissipation path via the insulating member sheet 67, the heat dissipation is improved as compared with the I-type magnetic core 21 of the power conversion device 400.
- the E-type magnetic core 22 is also in contact with the insulating member sheet 67, the heat dissipation performance of the power conversion device 401 is improved as compared to the power conversion device 400.
- windings 11 and 12 and insulating member 61 are arranged outside magnetic cores 21 and 22, as in the first and second examples. , 62, 63 are wound.
- the magnetic core 21 and the magnetic core 22 are arranged so as to be aligned in a direction along the surface on which the magnetic cores 21, 22 and the like of the housing 42 are placed.
- the I-type magnetic core 21 and the E-type magnetic core 22 are arranged in the vertical direction in each figure, whereas in FIG. 18, the I-type magnetic core 21 and the E-type magnetic core are arranged. 22 are arranged in the horizontal direction.
- the third example is structurally different from the other examples. That is, in FIG. 18, the configuration including the I-type magnetic core 21, the E-type magnetic core 22, and the insulating members 61, 62, and 63 in other examples is rotated by about 90 °.
- the positions, shapes, and assembling methods of the windings 11 and 12 and the insulating members 61, 62, and 63 with respect to the magnetic cores 21 and 22 are basically the same as in the first example of the third and fourth embodiments. It is the same, and is bent so that it may become what is called a C shape in a sectional view. That is, the insulating member 63 is provided in a region sandwiched between the first winding 11 and the second winding 12. An insulating member 61 is disposed between the first winding 11 and the magnetic core (I-type magnetic core 21 and E-type magnetic core 22), and the second winding 12 and the magnetic core (E-type magnetic core). An insulating member 62 is arranged between the core 22).
- the portions of the windings 11 and 12 that are arranged above the magnetic cores 21 and 22 in FIG. 18 and extend in the left-right direction in the drawing form the lead portions 13 and 14 by bending further upward. ing. These portions of the windings 11 and 12 are exposed to the outside. Further, an insulating member sheet 68 is disposed between the casing 42 and each of the portions of the windings 11 and 12 that are disposed below the magnetic cores 21 and 22 in FIG. That is, the insulating member sheet 68 is sandwiched between the windings 11 and 12 and the casing 42.
- the insulating member sheet 68 is made of the same material as the insulating member sheet 66. That is, the insulating member sheet 68 is a soft sheet-type member that is disposed as a high heat dissipation insulating member, like the insulating member sheet 66, and has a higher thermal conductivity than the insulating members 61, 62, 63.
- the power conversion device 402 of the third example is different from the power conversion devices 400 and 401 of the first example and the second example, but the configuration of the third example other than this is the same as that of the first example and the second example.
- the configuration is almost the same as the two examples. For this reason, the same code
- the effect of the power converter device of the 3rd example of this Embodiment is demonstrated.
- the operational effects of the third example are basically the same as those of the first example, the second example, and the other embodiments described above. Also in the third example, the size reduction, the insulation, and the heat dissipation are reduced. It is possible to provide a power conversion device 402 that combines all of them.
- the length of the insulating member 63 in the vertical direction is longer than the lengths of the first winding 11 and the second winding 12 extending in the vertical direction. is doing.
- the lowermost part of the insulating member 63 is formed so as to extend below the lowermost parts of the first winding 11 and the second winding 12.
- each component for example, the lowermost portions of the first winding 11 and the second winding 12 are in contact with the insulating member sheet 68, whereby heat generated in the windings 11 and 12 is generated by the insulating member sheet.
- the heat is radiated to the casing 42 through the 68 with high efficiency.
- the heat generation of the I-type magnetic core 21 is radiated with high efficiency from the leftmost exposed surface in FIG. 18, and the heat generation of the E-type magnetic core 22 is radiated with high efficiency from the rightmost exposed surface in FIG.
- side walls 44 and 43 are arranged on the left side of the I-type magnetic core 21 and the right side of the E-type magnetic core 22 so as to sandwich a highly heat-dissipating insulating member sheet 66 as in FIGS. May be.
- the insulating member sheet 66 at this time is disposed so as to contact both the side walls 44 and 43 and the magnetic cores 21 and 22.
Abstract
Description
実施の形態1.
まず図1を用いて、本実施の形態の電力変換装置の回路図の一例について説明する。図1を参照して、本実施の形態の電力変換装置は、入力側駆動回路1と、出力側駆動回路2と、トランス10とを主に有している。
以上に説明したように、本実施の形態の磁性コア21,22を含む電力変換装置100は、複数の巻線すなわち第一の巻線11および第二の巻線12のそれぞれがS字形状を有するように屈曲されている。これにより、第1の屈曲部から延びる第1の部分と、第2の屈曲部から延びる第2の部分とを、磁性コア21,22の延びる方向に沿って延びるようにトランス10を小型化することができる。つまり第一の巻線11および第二の巻線12を含む電力変換装置100の全体を、I型磁性コア21とE型磁性コア22とを重畳した構造物と同程度にまで、小型化することができる。
図9~図10を用いて、本実施の形態の第1例の電力変換装置の具体的な構成について説明する。
以上に示すように、第2例においては、第1例の高放熱性絶縁部材64の代わりに高放熱性の絶縁部材シート66により、巻線11,12から側壁43,44への伝熱がなされる。このため第1例と同様に、巻線11,12の発熱を側壁43,44から速やかに放熱する効果が確保される。
図11を参照して、第2例においても、図の左右方向に延びる絶縁部材61の最も左側の端部61Aは、第一の巻線11の第1の部分よりも図11の左側に延びるように形成されている。また図の左右方向に延びる絶縁部材62の最も右側の端部62Aは、第二の巻線12の第2の部分よりも図11の右側に延びるように形成されている。さらに図の上下方向に延びる絶縁部材62の最も下側の端部62Aは、第二の巻線12の第1の部分よりも図11の下側に延びるように形成されている。さらに図の上下方向に延びる絶縁部材63の最も下側の端部63Aは、第二の巻線12の第1の部分よりも図11の下側に延びるように形成されている。これらの端部61A,62A,63Aとそれらが隣り合う巻線11,12との間に隙間が形成される。この隙間は第1例においては高放熱性絶縁部材64により充填されているのに対し、第2例においては当該隙間には何も供給されず、隙間の距離により絶縁性能が満足されている。
図13~図15を用いて、本実施の形態の電力変換装置の具体的な構成について説明する。
本実施の形態の電力変換装置300は、複数の巻線すなわち第一の巻線11および第二の巻線12のそれぞれがC字形状を有するように屈曲されている。この場合においても、電力変換装置100のようにS字形状に屈曲される場合と同様に、第1の屈曲部から延びる第1の部分と、第2の屈曲部から延びる第2の部分とを、磁性コア21,22の延びる方向に沿って延びるようにトランス10を小型化することができる。つまり第一の巻線11および第二の巻線12を含む電力変換装置300の全体を、I型磁性コア21とE型磁性コア22とを重畳した構造物と同程度にまで、小型化することができる。
図16を参照して、本実施の形態の第1例の電力変換装置の具体的な構成について説明する。
本実施の形態の第1例においては、実施の形態3において外部に向けて露出している第一の巻線11および第二の巻線12の第1および第2の部分に相当する部分が、側壁43,44に貼り付けられた高放熱性の絶縁部材シート66に接触している。言い換えれば、第一の巻線11および第二の巻線12の第1および第2の部分が、絶縁部材シート66を介して放熱器としての筐体42(側壁43,44)に接触されている。このため、巻線11,12の第1および第2の部分の発熱を外部に高効率に放出する代わりに、高放熱性の絶縁部材シート66から側壁43,44に高効率に放熱することができる。側壁43,44は筐体42と接合されている(または一体として形成されている)放熱器であるため、側壁43,44に伝わった熱は速やかに筐体42に伝えられる。
当該第2例の作用効果は、基本的に第1例および上記の他の各実施の形態と同様であり、当該第2例においても、小型化、絶縁性、および放熱性をすべて兼ね備える電力変換装置401を提供することができる。
当該第3例の作用効果は、基本的に第1例、第2例および上記の他の各実施の形態と同様であり、当該第3例においても、小型化、絶縁性、および放熱性をすべて兼ね備える電力変換装置402を提供することができる。
Claims (8)
- 磁性コアと、
前記磁性コアの外側に巻回され、前記磁性コアの延びる方向に延びる部分を有するように屈曲された複数の巻線とを備え、
前記複数の巻線のいずれもが、すべての前記複数の巻線の中で前記磁性コアに対して最も外側に配置される領域を含むように屈曲される、電力変換装置。 - 前記複数の巻線のそれぞれは第1および第2の屈曲部を含み、
前記複数の巻線は2本であり、
前記2本の巻線のそれぞれにおける一方の端部と前記第1の屈曲部との間である第1の部分、および前記一方の端部と反対側の他方の端部と前記第2の屈曲部との間である第2の部分は前記磁性コアの延びる方向に延び、
前記第1の屈曲部から前記第1の部分が延びる方向と、前記第2の屈曲部から前記第2の部分が延びる方向とは互いに反対方向となるように、前記複数の巻線のそれぞれが屈曲されている、請求項1に記載の電力変換装置。 - 前記2本の巻線のうち一方の巻線の前記第1の部分は前記一方の巻線とは異なる他方の巻線の前記第1の部分よりも外側に配置され、
前記2本の巻線のうち前記他方の巻線の前記第2の部分は前記一方の巻線の前記第2の部分よりも外側に配置される、請求項2に記載の電力変換装置。 - 前記複数の巻線のそれぞれは第1および第2の屈曲部を含み、
前記複数の巻線は2本であり、
前記2本の巻線のそれぞれにおける一方の端部と前記第1の屈曲部との間である第1の部分、および前記一方の端部と反対側の他方の端部と前記第2の屈曲部との間である第2の部分は前記磁性コアの延びる方向に延び、
前記第1の屈曲部から前記第1の部分が延びる方向と、前記第2の屈曲部から前記第2の部分が延びる方向とは互いに同じ方向となるように、前記複数の巻線のそれぞれが屈曲されている、請求項1に記載の電力変換装置。 - 前記2本の巻線のうち一方の巻線の前記第1および第2の部分に挟まれた第3の部分と、前記2本の巻線のうち前記一方の巻線とは異なる他方の巻線の前記第1および第2の部分に挟まれた第3の部分とが互いに重畳され、
前記一方の巻線の前記第1の部分と前記他方の巻線の前記第1の部分とは同一平面上に並び、前記一方の巻線の前記第2の部分と前記他方の巻線の前記第2の部分とは同一平面上に並ぶ、請求項4に記載の電力変換装置。 - 前記磁性コアの延びる方向に関する一方の端面に接するように配置された放熱器をさらに備え、
前記複数の巻線のそれぞれにおける前記最も外側に配置される領域は、高放熱性絶縁部材を介して前記放熱器に接触される、請求項1~5のいずれか1項に記載の電力変換装置。 - 前記高放熱性絶縁部材は熱伝導率が0.5W/mK以上である、請求項6に記載の電力変換装置。
- 前記磁性コアの表面の少なくとも一部が外部に露出する、請求項1~7のいずれか1項に記載の電力変換装置。
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