Patent ID: 12199010

DESCRIPTION OF EMBODIMENTS

Hereinafter, power conversion apparatus1according to an embodiment of the present disclosure will be described in detail with reference to the drawings. In this regard, the embodiment described below is an example, and the present disclosure is not limited by this embodiment.

InFIGS.1A to12, a Cartesian coordinate system formed by an X axis, a Y axis and a Z axis is drawn for ease of description. A positive direction of the X axis is defined as a +X direction, a positive direction of the Y axis is defined as a +Y direction and a positive direction of the Z axis is defined as a +Z direction (upper direction). In addition, the X axis, the Y axis and the Z axis shown in each drawing indicate each direction in the Cartesian coordinate system, and do not accurately indicate a position (coordinate) of each part in the Cartesian coordinate system.

(Overall Configuration of Power Conversion Apparatus1)

The overall configuration of power conversion apparatus1will be described with reference toFIGS.1A,1B and2.FIG.1Ais a perspective view showing an overall configuration of power conversion apparatus1.FIG.1Bis an exploded perspective view showing the entire configuration of power conversion apparatus1.FIG.2is a cross-sectional view showing an internal configuration of power conversion apparatus1.FIG.2shows a cross section that is parallel to a ZX plane.FIGS.1A,1B and2omit part of parts if necessary for ease of understanding.

Power conversion apparatus1is an apparatus that is mounted on a vehicle such as an electric vehicle, and converts direct current power from a battery into an alternating current power, and outputs the alternating current to a motor. The battery is, for example, a lithium ion battery. The motor is, for example, a three-phase alternating current motor.

Power conversion apparatus1includes power conversion circuit2, driving circuit3and electric power source circuit4. Electric power source circuit4supplies power to driving circuit3. Driving circuit3generates a switching signal by the power supplied from electric power source circuit4. Furthermore, according to the switching signal generated by driving circuit3, a plurality of power conversion semiconductor elements of power conversion circuit2is driven. Thus, the direct current power is converted into the alternating current power.

Power conversion apparatus1includes first substrate100, second substrate200, shield plate300and sensor module400. Power conversion apparatus1adopts a multilayer structure that first substrate100and second substrate200are aligned in an upper and lower direction (Z direction) and disposed.

First substrate100is placed at a bottom portion of housing5in which power conversion apparatus1is housed. A plurality of power conversion semiconductor elements of power conversion circuit2is mounted on upper surface101of first substrate100. That is, power conversion circuit2is mounted on first substrate100.

Second substrate200is disposed on an upper side of first substrate100and with a gap from first substrate100. Components of driving circuit3and electric power source circuit4are mounted on upper surface201and lower surface202of first substrate200. That is, driving circuit3and electric power source circuit4are mounted on both surfaces of second substrate200. Driving circuit3and electric power source circuit4, and power conversion circuit2are electrically connected by using an unshown FFC and FFC connector.

Shield plate300is disposed between first substrate100and second substrate200. Shield plate300has a function of reducing transmission of electromagnetic noise form first substrate100to second substrate200.

As shown inFIG.2, shield plate300has a stepwise shape including planar portions301and304. Thus, when high height parts such as a capacitor are mounted on upper surface101of first substrate100and lower surface202of second substrate200, it is possible to suppress the height of power conversion apparatus1.

More specifically, low height parts of power conversion circuit2are disposed on a lower side of planar portion301, and high height parts of driving circuit3and electric power source circuit4are disposed on an upper side of planar portion301. Furthermore, high height parts of power conversion circuit2are disposed on a lower side of planar portion304, and low height parts of driving circuit3and electric power source circuit4are disposed on an upper side of planar portion304. Accordingly, it is possible to suppress the height of power conversion apparatus1.

In the present embodiment, adhesive6having heat dissipation properties is filled between shield plate300and first substrate100(a hatching portion inFIG.2). Adhesive6is, for example, a silicone-based adhesive. Consequently, it is possible to make heat generated by the power conversion semiconductor elements mounted on first substrate100escape from first substrate100to shield plate300. Thus, in other words, it is possible to increase a heat capacity of entire power conversion apparatus1.

By integrating shield plate300and first substrate100by using adhesive6, it is possible to raise a natural frequency. By raising the natural frequency, it is possible to prevent a resonance.

Sensor module400is disposed adjacent to shield plate300in a −X direction side of shield plate300. In the present embodiment, sensor module400is fixed to shield plate300.

Second substrate200is fixed to shield plate300by using screw11and screw12at fixing portions A on a +X end side. Details of fixing portions A will be described in detail below.

Furthermore, second substrate200is fixed to shield plate300and sensor module400by using screw13and screw14at fixing portions B on a −X end side. Details of fixing portions B will be described in detail below.

Furthermore, second substrate200and shield plate300are fixed by using screw15at fixing portion C formed in a region surrounded by two fixing portions A and two fixing portions B. Details of fixing portion C will be described in detail below.

Shield plate300is fixed to first substrate100and housing5by using screw16and screw17at fixing portions D on the +X end side. Details of fixing portions D will be described in detail below.

Furthermore, shield plate300is fixed to sensor module400by using screw18and screw19at fixing portions E on the −X end side. Details of fixing portions E will be described in detail below.

Sensor module400is fixed to first substrate100and housing5by using screw20and screw21at fixing portions F on the −X end side. Details of fixing portions F will be described in detail below.

(Configuration of First Substrate100)

The configuration of first substrate100will be described with reference toFIG.3.FIG.3is a perspective view showing the configuration of first substrate100. First substrate100is a thin plate member of a substantially rectangular shape that extends on an XY plane. First substrate100is formed by applying an insulation coating made of, for example, an epoxy resin on an aluminum plate that is a base, and forming a wiring pattern on the insulation coating.

In addition, the plate that is the base of first substrate100is not limited to the aluminum plate, and various metal plates can be used therefor. Thus, by using a metal material as a material of the plate that is the base of first substrate100, it is possible to make magnetic noise generated on first substrate100escape toward housing5. Furthermore, by using a material of high magnetic permeability for first substrate100, an outflow amount of the electromagnetic noise to first substrate100increases. Consequently, the total amount of electromagnetic noise flowing out to shield plate300decreases, so that it is possible to reduce transmission of the electromagnetic noise to second substrate200that is present via shield plate300.

As described above, a plurality of power conversion semiconductor elements of power conversion circuit2is mounted on upper surface101of first substrate100. Lower surface102of first substrate100is in contact with housing5. Consequently, it is possible to efficiently cool a plurality of power conversion semiconductor elements of power conversion circuit2.

Furthermore, each power conversion semiconductor element is formed as a chip part, and therefore has a wide contact area with upper surface101. Consequently, it is possible to efficiently cool each power conversion semiconductor element.

Furthermore, the thermal grease is filled in the gap caused by fine recesses and protrusions of lower surface102of first substrate100and fine recesses and protrusions of the bottom portion of housing5, so that it is possible to further improve cooling efficiency. In addition, first substrate100is ground-connected by using an unshown connector.

Hole103that penetrates in the Z direction is formed on the +X end side and a −Y end side of first substrate100. Screw16is inserted in hole103. Hole104that penetrates in the Z direction is formed on the +X end side and a +Y end side of first substrate100. Screw17is inserted in hole104.

Hole105that penetrates in the Z direction is formed on the −X end side and the +Y end side of first substrate100. Screw21is inserted in hole105. Hole106that penetrates in the Z direction is formed on the −X end side and the −Y end side of first substrate100. Screw20is inserted in hole106.

Three holes107,108and109that penetrate in the Z direction are aligned from the +Y end side to the −Y end side and formed on the −X end side of first substrate100. Magnetic elements51,52and53(described below) mounted in housing5are inserted in holes107,108and109. Furthermore, current plates61,62and63(described below) are disposed crossing holes107,108and109in an X direction.

(Configuration of Second Substrate200)

The configuration of second substrate200will be described with reference toFIG.4.FIG.4is a perspective view showing the configuration of second substrate200. Second substrate200is a thin plate member of a substantially rectangular shape that extends on the XY plane. Second substrate200is formed by forming a wiring pattern on an insulation plate that is the base.

As described above, components of driving circuit3and electric power source circuit4are mounted on upper surface201and lower surface202of second substrate200.

Hole203that penetrates in the Z direction is formed on the +X end side and the −Y end side of second substrate200. Screw11is inserted in hole203. Hole204that penetrates in the Z direction is formed on the +X end side and the +Y end side of second substrate200. Screw12is inserted in hole204.

Hole205that penetrates in the Z direction is formed on the −X end side and the +Y end side of second substrate200. Screw13is inserted in hole205. Hole206that penetrates in the Z direction is formed on the −X end side and the −Y end side of second substrate200. Screw14is inserted in hole206.

Hole207that penetrates in the Z direction is formed at a center portion of second substrate200. In other words, hole207is formed in a region surrounded by holes203,204,205and206in second substrate200. Screw15is inserted in hole207.

(Configuration of Shield Plate300)

The configuration of shield plate300will be described with reference toFIG.5.FIG.5is a perspective view showing the configuration of shield plate300. Shield plate300is a part molded by applying a bending process to a thin plate member made of metal such as an iron-based material. By using the iron-based material for the shield plate, the strength of a portion to which the shield plate is fastened rises, and the portion hardly is fractured. Furthermore, it is possible to reduce the fracture of the portion of a long fastening interval. Most of portions of shield plate300extend on the XY plane.

Shield plate300includes planar portion301that extends on the XY plane, wall portion303that extends from the +X end of planar portion301in a +Z direction, and planar portion304that extends from a +Z end of wall portion303in the +X direction.

Wall portion305bent from the −Y end of planar portion304in a −Z direction extends in the +X direction. Fixing portion306that is bent from the +Z end in the +Y direction and extends on the XY plane, and fixing portion308that is bent from the +Z end in the +Y direction and extends on the XY plane are formed on the +X end side of wall portion305.

Fixing portion306extends from wall portion305in the +Y direction. Screw hole307that penetrates in the Z direction is formed at fixing portion306. Screw11is screwed in screw hole307. Fixing portion308extends from wall portion305in the +Y direction. Hole309that penetrates in the Z direction is formed at fixing portion308. Screw16is inserted in hole309.

Wall portion310that is bent from the +Y end of planar portion304in the −Z direction extends in the +X direction. Fixing portion311that is bent from the +Z end in a −Y direction and extends on the XY plane, and fixing portion313that is bent from the +Z end in the −Y direction and extends on the XY plane are formed on the +X end side of wall portion310.

Fixing portion311extends from wall portion310in the −Y direction. Screw hole312that penetrates in the Z direction is formed at fixing portion311. Screw12is screwed in screw hole312. Fixing portion313extends from wall portion310in the −Y direction. Hole314that penetrates in the Z direction is formed at fixing portion313. Screw17is inserted in hole314.

Fixing portions301a,301band301care formed at the −X end of planar portion301. Fixing portions301a,301band301care aligned from the +Y end side to the −Y end side and formed. Fixing portions301a,301band301ceach extend in the −X direction.

Fixing portion301aincludes wall portion315that extends from the −X end of planar portion301in the +Z direction, planar portion316that extends from the +Z end of wall portion315in the +X direction, wall portion317that extends from the −X end of planar portion316in the +Z direction, and planar portion318that extends from the +Z end of wall portion317in the −X direction. Planar portion318extends on the XY plane. Hole319that penetrates in the Z direction is formed on planar portion318. Screw13is inserted in hole319.

Fixing portion301cincludes wall portion320that extends from the −X end of planar portion301in the +Z direction, planar portion321that extends from the +Z end of wall portion320in the −X direction, wall portion322that extends from the −X end of planar portion321in the +Z direction, and planar portion323that extends from the +Z end of wall portion322in the −X direction. Planar portion323extends on the XY plane. Hole324that penetrates in the Z direction is formed on planar portion323. Screw14is inserted in hole324.

Fixing portion301bincludes wall portion329that extends from the −X end of planar portion301in the +Z direction, and planar portion330that extends from the +Z end of wall portion329in the −X direction. Planar portion330extends on the XY plane. Hole331that penetrates in the Z direction is formed on the +Y end side of planar portion330. Screw19is inserted in hole331. Hole332that penetrates in the Z direction is formed on the −Y end side of planar portion330. Screw18is inserted in hole332.

Wall portion325is cut and raised from a center portion of planar portion301in the +Z direction. Wall portion325extends on the ZX plane. Fixing portion326extends from the +Z end of wall portion325in the +Y direction. Screw hole327that penetrates in the Z direction is formed at fixing portion326. Screw17is screwed in screw hole327.

In the present embodiment, fixing portions301aand301cused to be fixed to second substrate200extend in the X direction. On the other hand, fixing portions308and313used to be fixed to first substrate100extend in a Y direction.

By differing extension directions of the fixing portions, it is possible to prevent fracture of the fixing portions of shield plate300when vibration transmits from first substrate100to second substrate200via shield plate300. In addition, to obtain this effect, all of the fixing portions for first substrate100and the fixing portions for second substrate200should not extend in the same direction.

In other words, shield plate300includes a second substrate side fixing portion that extends in a first direction and is fixed to second substrate200, and a first substrate side fixing portion that extends in a direction different from the first direction, and is fixed to first substrate100.

Furthermore, fixing portion326is formed in a region surrounded by fixing portion306, fixing portion311, planar portion318and planar portion323. Fixing portion326has a function of reducing vibration of second substrate200.

In other words, shield plate300includes a plurality of first fixing portions that is fixed to second substrate200, and a second fixing portion that is formed in a region surrounded by these first fixing portions and is fixed to second substrate200.

Rib333extends from the −Y end of planar portion301in the +Z direction. Furthermore, rib334extends from the +Y end of planar portion301in the +Z direction. Rib333and rib334have functions of reducing vibration of shield plate300. Furthermore, rib333and rib334have functions of reducing deformation of shield plate300.

(Configuration of Sensor Module400)

The configuration of sensor module400will be described with reference toFIGS.6A to6D.FIG.6Ais a perspective view of sensor module400.FIGS.6B and6Care cross-sectional views of sensor module400.FIG.6Bshows a cross section that is parallel to a YZ plane.FIG.6Cshows a cross section that is parallel to the XY plane.FIG.6Dis a view showing sensor substrate500.

Sensor module400includes sensor holder401, sensor substrate500that is fixed to sensor holder401, and current sensors71,72and73that are mounted on sensor substrate500. Current sensors71,72and73are magnetic field type current sensors that measure a current flowing to power conversion circuit2.

Sensor holder401is a part that is formed by insert-molding an insert nut including a female screw portion and a cylindrical member including a through-hole, and is made of a resin.

Sensor holder401includes sensor attachment portion402to which sensor substrate500is attached, attachment portions403(two portions) that are fixed to first substrate100, attachment portions404(two portions) that are fixed to second substrate200, and attachment portions405(two portions) that are fixed to shield plate300.

Sensor attachment portion402is formed in a substantially frame shape. Sensor attachment portion402includes frame portion402aand frame portion402bthat extend in the Y direction and are parallel to each other. Furthermore, sensor attachment portion402includes coupling frame portion402cthat couples one ends (+Y side ends) of frame portions402aand402b, and coupling frame portion402dthat couples other ends (+Y side ends) of frame portions402aand402b. Furthermore, sensor attachment portion402includes coupling portion402ethat couples intermediate portions of frame portions402aand402b.

Frame portions402aand402b, coupling frame portion402cand coupling portion402eform hole406. Frame portions402aand402b, coupling frame portion402dand coupling portion402eform hole407.

As shown inFIGS.6B and6C, sensor substrate500is a part that is attached to a lower surface of sensor attachment portion402. More specifically, sensor substrate500is screwed to a plurality of portions of the lower surface of sensor attachment portion402. Furthermore, sensor substrate500and second substrate200are electrically connected by using an unshown FFC and FFC connector, etc.

FIG.6Dshows a top view of sensor substrate500. Sensor substrate500is a thin plate member that is formed in a substantially rectangular shape, and in which a wiring pattern is formed on the insulation plate that is the base.

Sensor substrate500includes frame portion501and frame portion502that extend in the Y direction and are parallel to each other.

Furthermore, sensor substrate500includes coupling frame portion503that couples one ends (+Y side ends) of frame portions501and502, and coupling frame portion504that couples other ends (−Y side ends) of frame portions501and502.

Furthermore, coupling portions505,506and507that couple frame portion501and frame portion502are aligned from one end side (+Y side) to the other end side (−Y side) and formed between coupling frame portion502and coupling frame portion504.

Frame portions501and502, coupling frame portion503and coupling portion505form hole508. Frame portions501and502and coupling portions505and506form hole509. Frame portions501and502and coupling portions506and507form hole510. Frame portions501and502, coupling portion507and coupling frame portion504form hole511.

Sensor71is mounted on a back surface of coupling frame portion503. Sensor72is mounted on a back surface of coupling portion506. Sensor73is mounted on a back surface of coupling frame portion504.

Attachment portion403includes hole403athat penetrates in the Z direction. Attachment portion404includes female screw portion404athat extends in the −Z direction. Attachment portion405includes female screw portion405athat extends in the −Z direction.

(Configurations of Fixing Portions A and Fixing Portion C)

The configurations of fixing portions A and fixing portion C will be described with reference toFIG.7.FIG.7is a cross-sectional view showing fixing portion A and fixing portion C. Hereinafter, only fixing performed by using screw11will be described, and fixing performed by using screw12or screw13is configured likewise and therefore description thereof will be omitted.FIG.7shows a cross section that is parallel to the YZ plane.

When second substrate200is mounted at fixing portion306that extends from the +Z end of wall portion305of shield plate300in the +Y direction, and screw11is screwed to screw hole307through hole203, second substrate200is fixed to shield plate300. In this case, second substrate200and shield plate300are mechanically connected and electrically connected.

(Configuration of Fixing Portions B)

The configuration of fixing portions B will be described with reference toFIG.8.FIG.8is a cross-sectional view of fixing portion B. Hereinafter, only fixing performed by using screw13will be described, and fixing performed by using screw14is configured likewise and therefore description thereof will be omitted.FIG.8shows a cross section that is parallel to the ZX plane.

Planar portion318of shield plate300and second substrate200are placed at attachment portion404of sensor holder401. Furthermore, when screw13is screwed to female screw portion404athrough hole205and hole319, second substrate200is fixed to shield plate300and sensor module400. In this case, second substrate200and shield plate300are mechanically and electrically connected.

(Configuration of Fixing Portions D)

The configuration of fixing portions D will be described with reference toFIG.9.FIG.9is a cross-sectional view of fixing portion D. Hereinafter, only fixing performed by using screw16will be described, and fixing performed by using screw17is configured likewise and therefore description thereof will be omitted.FIG.9shows a cross section that is parallel to the YZ plane.

Fixing portion308that extends from a −Z end of wall portion305of shield plate300in the +Y direction is placed on first substrate100placed in housing5. Furthermore, when screw16is screwed to the female screw portion formed in housing5through hole309and hole103, shield plate300is fixed to first substrate100and housing5.

In this case, shield plate300is electrically connected with housing5. Shield plate300is not electrically connected with first substrate100. That is, second substrate200is electrically connected with housing5with shield plate300interposed therebetween. Thus, second substrate200is ground-connected.

As described above, in the present embodiment, first substrate100is ground-connected by using an unshown connector, and second substrate200is ground-connected with housing5with shield plate300interposed therebetween. This is for the following reason.

Currents flowing in control circuit3and electric power source circuit4mounted on second substrate200are relatively small. Hence, by ground-connecting second substrate200to housing5with shield plate300interposed therebetween, wiring for ground connection is omitted.

On the other hand, a current flowing in power conversion circuit2mounted on first substrate100is relatively large. Hence, by avoiding ground-connecting first substrate100to housing5, an influence such as electromagnetic noise on control circuit3and electric power source circuit4is prevented.

(Configuration of Fixing Portions E)

The configuration of fixing portions E will be described with reference toFIG.10.FIG.10is a cross-sectional view of fixing portion E. Hereinafter, only fixing performed by using screw18will be described, and fixing performed by using screw19is configured likewise and therefore description thereof will be omitted.FIG.10shows a cross section that is parallel to the ZX plane.

When planar portion330of shield plate300is placed at attachment portion405of sensor holder401, and screw18is screwed to female screw portion405athrough hole332, shield plate300is fixed to sensor module400.

(Configuration of Fixing Portions F)

The configuration of fixing portions F will be described with reference toFIG.11.FIG.11is a cross-sectional view of fixing portion F. Hereinafter, only fixing performed by using screw20will be described, and fixing performed by using screw21is configured likewise and therefore description thereof will be omitted.FIG.11shows a cross section that is parallel to the ZX plane.

Attachment portion403of sensor holder401is placed on first substrate100placed in housing5. Furthermore, when screw21is screwed to the female screw portion formed in housing5through hole403aand hole106, sensor holder401is fixed to first substrate100and housing5.

(Positional Relationship Between First Substrate100, and Current Sensors71,72and73)

The positional relationship between first substrate100and current sensors71,72and73will be described with reference toFIGS.12A and12B.FIGS.12A and12Bshow cross-sectional views showing the positional relationship between first substrate100and current sensors71,72and73.FIG.12Ashows a cross section that is parallel to the YZ plane.FIG.12Bshows a cross section that is parallel to the ZX plane.

As shown inFIG.12A, magnetic elements51,52and53are fixed to housing5. Magnetic element51includes bottom portion51athat is fixed to housing5, and wall portions51band51cthat extend from both ends of bottom portion51ato the +Z direction (upper direction). The same applies to magnetic elements52and53, too.

Magnetic elements51,52and53generate magnetic fields by currents flowing in current plates61,62and63. Current sensors71,72and73respectively output current signals depending on magnitudes of the magnetic fields generated by magnetic elements51,52and53.

The current signals from current sensors71,72and73are inputted to driving circuit3of second substrate200via the FFC connector. Driving circuit3performs various types of control based on an inputted current value.

Wall portion51aof magnetic element51penetrates hole107of first substrate100, passes on the +Y side of coupling frame portion503of sensor substrate500, and reaches hole406of sensor holder401. Wall portion51bof magnetic element51penetrates hole107of first substrate100and hole508of sensor substrate500, and reaches hole406.

Wall portion52aof magnetic element52penetrates hole108of first substrate100and hole509of sensor substrate500, and reaches hole406. Wall portion52bof magnetic element52penetrates hole108of first substrate100and hole510of sensor substrate500, and reaches hole407.

Wall portion53aof magnetic element53penetrates hole109of first substrate100and hole511of sensor substrate500, and reaches hole407. Wall portion53bof magnetic element53penetrates hole109of first substrate100, passes on the −Y side of coupling frame portion504of sensor substrate500, and reaches hole407.

As described above, current sensor71is mounted on the lower surface of coupling frame portion503of sensor substrate500. That is, current sensor71is disposed between wall portions51band51cof magnetic element51. In other words, current sensor71is disposed right above magnetic element51. In still other words, current sensor71is disposed overlapping magnetic element51in a thickness direction of first substrate100. Current sensor71measures the current flowing in current plate61based on the magnetic field generated by magnetic element51.

Current sensor72is mounted on a lower surface of coupling portion506of sensor substrate500. That is, current sensor72is disposed between wall portions52band52cof magnetic element52. In other words, current sensor72is disposed right above magnetic element52. In still other words, current sensor72is disposed overlapping magnetic element52in the thickness direction of first substrate100. Current sensor72measures the current flowing in current plate62based on the magnetic field generated by magnetic element52.

Current sensor73is mounted on a lower surface of coupling frame portion504of sensor substrate500. That is, current sensor73is disposed between wall portions53band53cof magnetic element53. In other words, current sensor73is disposed right above magnetic element53. In still other words, current sensor73is disposed overlapping magnetic element53in the thickness direction of first substrate100. Current sensor73measures the current flowing in current plate63based on the magnetic field generated by magnetic element53.

In addition, as described above, sensor holder401is a part made of a resin. Hence, sensor holder401hardly influences the magnetic fields generated by magnetic elements51,52and53. Consequently, it is possible to improve measurement precision of current sensors71,72and73.

From a viewpoint of the above heat capacity, it is preferable to widen the area of shield plate300. However, when current sensors71,72and73are directly disposed on shield plate300, the magnetic fields generated by magnetic elements51,52and53are disturbed, and measurement precision of current sensors71,72and73lowers.

By contrast with this, according to the present embodiment, sensor holder401is provided adjacent to shield plate300to make it possible to widen the area of shield plate300and improve the measurement precision of current sensors71,72and73.

As described above, the power conversion apparatus according to the present embodiment includes: a first substrate on which power conversion circuits are mounted; a second substrate on which a driving circuit that drives the power conversion circuits is mounted; and a shield plate that is disposed between the first substrate and the second substrate, and the first substrate is a metal substrate.

Consequently, it is possible to improve cooling capability.

While various embodiments have been described herein above, it is to be appreciated that various changes in form and detail may be made without departing from the spirit and scope of the invention(s) presently or hereafter claimed.

This application is entitled to and claims the benefit of Japanese Patent Application No. 2018-060312, filed on Mar. 27, 2018, the disclosure of which including the specification, drawings and abstract is incorporated herein by reference in its entirety.

INDUSTRIAL APPLICABILITY

The power conversion apparatus according to the present disclosure can improve cooling capability, and is suitable for use in a vehicle.

REFERENCE SIGNS LIST

1Power conversion apparatus2Power conversion circuit3Driving circuit4Electric power source circuit5Housing6Adhesive11,12,13,14,15,16,17,18,19,20,21Screw51,52,53Magnetic element51a,52a,53aBottom portion51b,51c,52b,52c,53b,53cWall portion61,62,63Current plate71,72,73Current sensor100First substrate101Upper surface102Lower surface103,104,105,106,107,108,109Hole200Second substrate201Upper surface202Lower surface203,204,205,206,207Hole300Shield plate301,304,316,318,321,323,330Planar portion303,305,310,315,317,320,322,325,329Wall portion301a,301b,301c,306,308,311,313,326Fixing portion307,312,327Screw hole309,314,319,324,331,332Hole333,334Rib400Sensor module401Sensor holder402Sensor attachment portion402a,402bFrame portion402c,402dCoupling frame portion402eCoupling portion403,404,405Attachment portion403aHole404a,405aFemale screw portion406,407Hole500Sensor substrate501,502Frame portion503,504Coupling frame portion505,506,507Coupling portion508,509,510,511Hole