JP5609289B2 - Inverter integrated motor - Google Patents

Description

  The present invention relates to an inverter integrated motor in which an inverter and a motor are integrated.

  As a conventional inverter-integrated motor, there is one that suppresses heat conduction from the motor to the inverter and suppresses an increase in the temperature of the inverter (see Patent Document 1).

JP 2009-38914 A

  However, the above-described conventional inverter-integrated motor transmits heat generated by the motor to a heat sink for cooling the inverter, thereby suppressing heat conduction from the motor to the inverter. For this reason, the temperature of the heat radiating plate rises and the heat radiating performance of the heat radiating plate deteriorates, resulting in a problem that the temperature of the inverter rises.

  The present invention has been made paying attention to such problems, and by improving the heat dissipation performance in the heat transfer path from the motor to the inverter, the heat conduction from the motor to the inverter is suppressed, and the temperature of the inverter rises. It aims at suppressing.

The present invention is an inverter integrated motor in which a motor and an inverter are integrated. An inverter case that houses the inverter, and a bus bar that is fixed to the inverter case and partially protrudes outside the inverter case to electrically connect the inverter and the motor . the outer periphery of the power distribution unit and an insulating member for covering a part, to support the inverter case, a motor case for accommodating the motor therein, provided in the motor case, the insulating member which projects to the outside of Lee Nbatakesu A heat transfer section that is in close contact with the surface and through which the heat of the bus bar is transmitted through the insulating member .

  According to the present invention, the motor case is provided with the heat transfer section that is in close contact with the outer peripheral surface of the power distribution section, so that the heat transmitted from the motor to the power distribution section can be transmitted to the heat transfer section. Thereby, the heat dissipation performance in the heat transfer path from the motor to the inverter can be improved, and the heat conduction from the motor to the inverter can be suppressed to suppress the temperature rise of the inverter.

It is a longitudinal cross-sectional view of the inverter integrated motor by 1st Embodiment. It is the figure which showed the process of attaching an inverter case to the motor case by 1st Embodiment. It is a longitudinal cross-sectional view of the inverter integrated motor by 2nd Embodiment. It is a longitudinal cross-sectional view of the inverter integrated motor by 3rd Embodiment. It is a longitudinal cross-sectional view of the inverter integrated motor by 4th Embodiment. It is a longitudinal cross-sectional view of the inverter integrated motor by 5th Embodiment. It is a longitudinal cross-sectional view of the inverter integrated motor by 6th Embodiment. It is the figure which showed the process of attaching an inverter case to the motor case by 6th Embodiment. It is a longitudinal cross-sectional view of the inverter integrated motor by 7th Embodiment. It is a longitudinal cross-sectional view of the inverter integrated motor by 8th Embodiment. It is the figure which showed the process of attaching an inverter case to the motor case by 8th Embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
FIG. 1 is a longitudinal sectional view of an inverter-integrated motor 1 according to the present embodiment.

  The inverter-integrated motor 1 includes a motor 2 that generates power, an inverter 3 that supplies electric power for driving the motor 2, and a power distribution unit 4 that electrically connects the motor 2 and the inverter 3.

  The motor 2 includes a rotating shaft 21, a rotor 22, and a stator 23. These motor components are housed in a substantially cylindrical motor housing 51 formed in a metal motor case 5.

  The rotating shaft 21 is rotatably supported by two bearings 6 provided in the motor housing portion 51.

  The rotor 22 is fixed to the outer periphery of the rotating shaft 21 and rotates integrally with the rotating shaft 21. A plurality of permanent magnets are embedded in the outer peripheral portion of the rotor 22 at predetermined intervals in the circumferential direction.

  The stator 23 is configured by connecting a plurality of stator cores around which coils are wound in an annular shape, and is provided in the motor housing 51 so as to cover the outer periphery of the rotor 22 at a predetermined interval in the radial direction from the rotor 22. Fixed.

  A cooling water passage 52 that is formed around the stator 23 and cools the motor 2 is formed in the motor housing portion 51.

  The inverter 3 is a current converter that mutually converts two types of electricity, DC and AC. The inverter 3 converts the direct current from the direct-current power source 7 into a three-phase alternating current (U-phase current, V-phase current, W-phase current) that is shifted in phase by 120 degrees, and the coil of the stator 23 via the power distribution unit 4. Shed. In this way, a rotating magnetic field is generated in the stator 23 by passing a three-phase alternating current through the coil of the stator 23, and the rotor 22 is rotated by attracting and repelling the permanent magnets of the rotor 22. Thereby, the rotating shaft 21 rotates together with the rotor 22.

  The inverter case 8 is a metal box-like case and houses the inverter 3 therein. The inverter case 8 includes a circular insertion hole 81 through which the power distribution unit 4 is inserted into the bottom wall 8a. An annular fitting groove 82 having a larger diameter than that of the insertion hole 81 is formed on the bottom wall rear surface of the lower portion of the insertion hole 81. A holding member 9 for holding the power distribution unit 4 is fixed to the bottom wall surface of the inverter case 8 by a bolt 93.

  The power distribution unit 4 includes a bus bar 41, an insulating resin 42, an inverter power supply line 43, and a motor power supply line 44.

  The bus bar 41 is a strip-shaped conductor not provided with an insulating coating. Both ends of the bus bar 41 protrude from the insulating resin 42, and an upper end portion of the bus bar 41 is connected to the inverter 3 via the inverter feed line 43, and a lower end portion thereof is connected to the coil of the stator 23 via the motor feed line 44. .

  The insulating resin 42 includes a collar part 421, a thick part 422, a taper part 423, and a thin part 424, and covers the bus bar 41 to prevent a short circuit between the motor case 5 and the inverter case 8.

  The collar portion 421 is formed at the upper end portion of the insulating resin 42. The collar portion 421 is a circular portion having a larger diameter than the insertion hole 81 of the inverter case 8. The collar portion 421 is disposed inside the inverter case 8 and is inserted into the holding hole 91 of the holding member 9 so as to be movable in a direction perpendicular to the axial direction (protruding direction) of the insulating resin 42. Fixed to.

  The thick portion 422 is a cylindrical portion that extends downward from the collar portion 421 and protrudes from the inverter case 8, and is inserted into the insertion hole 81 of the inverter case 8.

  The tapered portion 423 is located below the thick portion 422 and is a portion having a tapered surface 425 that is inclined from the thick portion 422 toward the thin portion 424 toward the inside (left side in the drawing) of the motor case 5 at a predetermined angle. .

  The thin portion 424 is a portion that is located below the tapered portion 423 and includes a flat surface 426 that extends vertically from the lower end of the tapered portion 423.

  One end of the inverter power supply line 43 is connected to the inverter 3, and the other end is connected to the upper end of the bus bar 41 via the inverter connection terminal 431. One end of the motor power supply line 44 is connected to the lower end of the bus bar 41 via the motor connection terminal 441, and the other end is connected to the coil of the stator 23. Thereby, the alternating current that has flowed from the inverter 3 via the bus bar 41 flows to the coil.

  Here, since heat is generated in the coil of the stator 23 when the motor is driven, the temperature of the coil may be higher than the temperature of the internal components of the inverter such as an IGBT (Insulated Gate Bipolar Transistor). If it does so, the heat of a coil will be transmitted to the inverter internal components via the motor power supply line 44, the bus bar 41, and the inverter power supply wire 43, and the temperature of an inverter internal component will rise by that much. Therefore, since it is necessary to suppress the heat generated in the coil so that the temperature of the inverter internal parts does not exceed the guaranteed temperature, the output of the motor 2 is limited. In particular, in the case of the inverter-integrated motor 1 as in the present embodiment, the degree of freedom in handling the power distribution unit 4 is lower than that in which the motor 2 and the inverter 3 are separated, and the motor feed line 44 and the bus bar 41 Since the length tends to be shortened, the amount of heat released from the motor power supply line 44 and the bus bar 41 is also reduced, and the temperature of the inverter internal components is likely to rise.

  Therefore, in the present embodiment, the motor case 5 is provided with a heat radiating portion (heat transfer portion) 52 integrally formed with the motor case 5, and the heat transferred from the coil of the stator 23 to the bus bar 41 by the heat radiating portion 52 is efficiently external air. To suppress the temperature rise of the inverter internal components. Hereinafter, the heat radiation part 52 provided in the motor case 5 will be described.

  The heat dissipating part 52 is provided above the motor housing part 51 in the figure, an insertion hole 521 through which the power distribution part 4 is inserted, and a protrusion part 522 that fits into the fitting groove 82 of the inverter case 8 via the O-ring 10. . The space between the heat radiation part 52 and the motor housing part 51 is closed by the motor cover 11.

  The insertion hole 521 includes a thick part insertion hole 521a through which the thick part 422 of the insulating resin 42 is inserted, a tapered part insertion hole 521b through which the taper part 423 is inserted, a thin part insertion hole 521c through which the thin part 424 is inserted, Consists of.

  The thick portion insertion hole 521a has a portion between the inner peripheral surface of the thick portion insertion hole 521a and the outer peripheral surface of the thick portion 422 of the insulating resin 42 in accordance with the shape of the thick portion 422 of the insulating resin 42. It is formed to touch.

  The tapered portion insertion hole 521 b includes a tapered surface 523 that is inclined inward from the side surface side of the motor case 5 at the same angle as the inclined angle of the tapered surface 425 formed in the tapered portion 423 of the insulating resin 42. The taper surface 523 of the heat radiating portion 52 is provided so as to face the taper surface 425 of the insulating resin 42 and is formed on the side surface side of the heat radiating portion 52 in contact with the outside air.

  Then, by pressing the taper surface 523 of the heat radiating portion 52 against the taper surface 425 of the insulating resin 42, the heat radiating portion 52 and the insulating resin 42 are taper-fitted to bring the insulating resin 42 and the heat radiating portion 52 into close contact with each other. Yes.

  The thin portion insertion hole 521c is formed so that a part of the inner peripheral surface of the thin portion insertion hole 521c and the outer peripheral surface of the thin portion 424 of the insulating resin 42 are in contact with the shape of the thin portion 424 of the insulating resin 42. Is done.

  Thus, according to this embodiment, since the inner peripheral surface of the insertion hole 521 of the heat radiating portion 52 and the outer peripheral surface of the insulating resin 42 are brought into close contact with each other, the heat of the power distribution unit 4 is released to the outside air via the heat radiating portion 52. Can be released. That is, the heat of the coil transmitted from the motor power supply line 44 to the bus bar 41 can be transmitted to the heat radiating portion 52 that is in close contact with the insulating resin 42 and released to the outside air.

  As a result, the amount of heat transmitted to the inverter internal parts via the bus bar 41 can be suppressed, so that the temperature rise of the inverter 3 can be suppressed.

  Moreover, by taper-fitting the heat radiating part 52 and the insulating resin 42, the adhesiveness between the heat radiating part 52 and the insulating resin 42 is increased and the contact thermal resistance is lowered in the taper-fitted part. Therefore, the heat dissipation performance of the heat dissipation part 52 is improved, and the heat transmitted from the coil to the power distribution part 4 can be more effectively released from the heat dissipation part 52 to the outside air. The contact thermal resistance refers to a thermal resistance generated when the contact surfaces of solids do not completely adhere to each other.

  The insulating resin 42 is fixed to the inverter case 8 so as to be movable in a direction perpendicular to the axial direction of the insulating resin 42. Therefore, when the tapered surface 523 of the heat radiating portion 52 is pressed against the tapered surface 425 of the insulating resin 42, the reaction force that the heat radiating portion 42 receives from the insulating resin 42 can be reduced. Thereby, the adhesiveness of the thermal radiation part 52 and the insulating resin 42 can be improved more.

  Further, a protrusion 522 is provided in the heat radiating part 52, and the protrusion 522 is fitted in the fitting groove 82 formed in the low wall 8 a of the inverter case 8. Therefore, if it is normal, the part which becomes a dead space which only supports the inverter case 8 can be effectively utilized as the heat radiation part 52.

  FIG. 2 is a diagram showing a process of assembling the inverter case 8 to the motor case 5.

  As shown in FIG. 2, according to the present embodiment, the protrusion 522 of the heat radiating portion 52 is formed in the tapered portion insertion hole 521 b of the heat radiating portion 52 in the process of fitting the protrusion 522 of the heat radiating portion 52 into the fitting groove 82 of the inverter case 8. The tapered surface 523 is pressed against the tapered surface 425 formed on the tapered portion 423 of the insulating resin 42 so that the heat radiating portion 52 and the insulating resin 42 can be taper-fitted.

  Therefore, since a special process for taper-fitting the heat radiation part 52 and the insulating resin 42 is not necessary, the work process is not increased and the assembly can be performed with a simple work process.

(Second Embodiment)
Next, a second embodiment of the present invention will be described. The second embodiment of the present invention is different from the first embodiment in the shape of the insulating resin 42 and the shape of the insertion hole 521 of the heat dissipation part 52. Hereinafter, the difference will be mainly described. In each embodiment described below, the same reference numerals are used for portions that perform the same functions as those of the above-described embodiments, and repeated description is appropriately omitted.

  FIG. 3 is a longitudinal sectional view of a main part of the inverter-integrated motor 1 according to the present embodiment.

  As shown in FIG. 3, the tapered portion 423 of the insulating resin 42 according to the present embodiment includes two tapered surfaces 425 a and 425 b that are formed to face each other and have different inclination angles. Then, two tapered surfaces 523a and 523b that are also opposed to the tapered portion insertion hole 521b of the heat radiating portion 52 are formed in accordance with the inclination angles of the two tapered surfaces 425a and 425b, and each is taper-fitted.

  As a result, the same effects as those of the first embodiment can be obtained, and the number of taper-fitted portions can be increased, so that the contact thermal resistance can be suppressed more than that of the first embodiment, and the heat dissipation performance of the heat dissipation portion 52 can be reduced. Can be improved.

(Third embodiment)
Next, a third embodiment of the present invention will be described. The third embodiment of the present invention is different from the first embodiment in that the heat conducting member 12 is inserted between the insulating resin 42 and the heat radiating portion 52. Hereinafter, the difference will be mainly described.

  FIG. 4 is a longitudinal sectional view of a main part of the inverter-integrated motor 1 according to the present embodiment.

  As shown in FIG. 4, in this embodiment, heat conduction such as a heat conductive sheet or heat conductive grease is promoted between the inner peripheral surface of the insertion hole 521 of the heat radiating portion 52 and the outer peripheral surface of the insulating resin 42. A heat conducting member 12 is provided.

  Thereby, for example, when a heat conductive sheet is used as the heat conductive member 12, the heat conductive sheet also enters the fine irregularities on the inner peripheral surface of the insertion hole 521 of the heat radiating portion 52. Therefore, the contact area between the heat conductive sheet and the inner peripheral surface of the insertion hole 521 of the heat radiating portion 52 is increased, and the contact thermal resistance of the portion where the heat conductive member 12 is provided can be suppressed.

  Further, for example, when heat conductive grease is used as the heat conductive member 12, it is possible to suppress the formation of an air layer between the inner peripheral surface of the insertion hole 521 of the heat radiating portion 52 and the outer peripheral surface of the insulating resin 42. Adhesiveness between the insulating resin 42 and the heat radiating portion 52 at the portion where the heat conducting member 12 is provided can be improved. Thereby, the contact thermal resistance of the site | part in which the heat conductive member 12 was provided can be suppressed.

  In this embodiment, the lower end portion of the bus bar 41 does not protrude from below the insulating resin 42, and only the surface 41 a of the lower end portion of the bus bar to which the external terminal 441 of the motor power supply line 44 is connected is a thin portion of the insulating resin 42. It is exposed on the flat surface 426 of 424. Then, the nut 13 is embedded in the insulating resin 42 so as to be in contact with the rear surface 41b of the lower end of the bus bar to which the external terminal 441 of the motor power supply line 44 is connected.

  Thereby, since it is not necessary to prepare the nut 13 as a separate part when connecting the motor power supply line 44 to the bus bar 41, the motor power supply line 44 can be easily connected.

  According to the present embodiment described above, the same effects as those of the first embodiment can be obtained, and the insulating resin 42 and the heat radiating portion 52 other than the portion where the insulating resin 42 and the heat radiating portion 52 are tapered are fitted. Since the heat conductive member 12 is provided in the contact portion with the contact heat resistance, the contact heat resistance is further suppressed, and the heat radiation performance of the heat radiation portion 52 can be improved.

  Further, since the nut 13 is embedded in the insulating resin 42, the motor power supply line 44 can be easily connected.

(Fourth embodiment)
Next, a fourth embodiment of the present invention will be described. The fourth embodiment of the present invention is different from the third embodiment in that the shape of the bus bar 41 is a crank shape and the interval between the bus bar 41 and the heat radiating portion 52 is narrowed. Hereinafter, the difference will be mainly described.

  FIG. 5 is a longitudinal sectional view of a main part of the inverter-integrated motor 1 according to the present embodiment.

  As shown in FIG. 5, in this embodiment, the shape of the bus bar 41 is a crank shape in which the lower end portion is bent stepwise. Thereby, the space | interval of the bus bar 41 and the thermal radiation part 52 was narrowed, and the bus bar 41 was located in the place nearer to the heat conductive member 12. FIG.

  As a result, the same effects as those of the third embodiment can be obtained, and the heat of the bus bar 41 can be easily transmitted to the heat radiating portion 52, so that the heat radiating performance of the heat radiating portion 52 can be further improved.

(Fifth embodiment)
Next, a fifth embodiment of the present invention will be described. The fifth embodiment of the present invention is different from the first embodiment in that a fixing member for fixing the bus bar 41 to the motor case 5 is provided. Hereinafter, the difference will be mainly described.

  FIG. 6 is a longitudinal sectional view of a main part of the inverter-integrated motor 1 according to the present embodiment.

  As shown in FIG. 6, in the present embodiment, a fixing extending from the connection portion 53 toward the side surface of the motor case 5 is fixed to the connection portion 53 of the motor case 5 connecting the motor housing portion 51 and the heat dissipation portion 52. A member 14 is provided.

  The length of the fixing member 14 is set so that the front end surface thereof is in contact with the surface of the bus bar 41 protruding from the lower end portion of the insulating resin 42. The nut 13 is embedded in the distal end portion of the fixing member 14 so as to be peeled off from the distal end surface, and the bolt 15 is screwed into the nut 13 to connect the external terminal 441 of the motor power supply line 44.

  Thereby, since the insulating resin 42 can be pressed against the insertion hole 521 inside the motor case of the heat radiating portion 52 by the tension (bolt axial force) generated in the axial direction of the bolt 15, the contact thermal resistance can be suppressed. Therefore, the heat dissipation performance of the heat dissipation part 52 can be improved.

(Sixth embodiment)
Next, a sixth embodiment of the present invention will be described. The sixth embodiment of the present invention is different from the first embodiment in the shape of the insertion holes of the insulating resin 42 and the heat radiating portion 52. Hereinafter, the difference will be mainly described.

  FIG. 7A is a longitudinal cross-sectional view of a main part of the inverter-integrated motor 1 according to the present embodiment. FIG. 7B shows only the inverter case 8 in the BB cross-sectional view of FIG.

  As shown in FIGS. 7A and 7B, the insertion hole 81 of the inverter case 8 according to the present embodiment has a fitting portion 811 that fits into the protruding portion of the heat radiating portion 52 via the O-ring 10. , And a guide portion 812 formed below the fitting portion 811.

  The guide portion 812 is formed to easily fit the inverter case 8 to the motor case 5, and has a crescent-shaped guide surface 813 and a crescent-shaped guide protruding from the inner peripheral surface of the fitting portion 811. A protrusion 814.

  In this embodiment, the insulating resin 42 and the heat radiating portion 52 are not formed with a tapered surface, and the insulating resin 42 includes only a thick portion 422 extending downward from the collar portion 421. Then, the inner peripheral surface of the insertion hole 521 of the heat radiating portion 52 is brought into contact with the outer peripheral surface of the thick portion 422 of the insulating resin 42, and the heat of the coil transmitted to the bus bar 41 is transmitted to the heat radiating portion 52. In the present embodiment, the collar portion 421 is directly fixed to the inverter case 8 with a bolt or the like.

  FIG. 8 is a diagram illustrating a process of assembling the inverter case 8 to the motor case 5.

  As shown in FIGS. 8A and 8B, when the protrusion 522 of the heat radiating portion 52 is fitted to the fitting portion 811 of the inverter case 8, first, the upper end of the protrusion 522 of the heat radiating portion 52 is moved. It abuts on the guide surface 813 of the guide portion 812.

  Next, as shown in FIG. 8C, the heat radiating portion 52 is moved along the guide surface 813 to the right side in the drawing until it abuts against the guide protrusion 814. The protruding amount of the guide protrusion 814 is adjusted so that the thick portion 422 of the insulating resin 42 abuts the inner peripheral surface of the insertion hole 521 of the heat radiating portion 52 when the guide protrusion 814 is moved in this manner. The pressing force for pressing the heat radiating portion 52 against the insulating resin 42 can be adjusted depending on the amount.

  After the heat dissipating part 52 comes into contact with the guide protrusion 814 of the guide part 812, as shown in FIG. 8D, the heat dissipating part 52 is moved upward in the figure to fit the insertion hole 81 of the inverter case 8. The protruding portion 522 of the heat radiating portion 52 is fitted to the portion 811.

  As described above, according to the present embodiment, by forming the guide surface 813 and the guide protrusion 814, the heat radiating portion 52 can be always brought into contact with the insulating resin 42 with a substantially constant pressing force. Adjustments and the like are unnecessary, and the work man-hours can be reduced.

  Further, since the heat radiating portion 52 can be brought into contact with the insulating resin 42 while being pressed, the contact thermal resistance between the insulating resin 42 and the heat radiating portion 52 can be suppressed. Therefore, the heat of the coil transmitted to the bus bar 41 can be efficiently transmitted to the heat radiating portion 52, and the heat radiation performance can be improved.

(Seventh embodiment)
Next, a seventh embodiment of the present invention will be described. The seventh embodiment of the present invention is different from the sixth embodiment in the shapes of the insertion holes of the insulating resin 42 and the heat radiating portion 52. Hereinafter, the difference will be mainly described.

  FIG. 9 is a longitudinal sectional view of a main part of the inverter-integrated motor 1 according to the present embodiment.

  As shown in FIG. 9, this embodiment forms tapered surfaces 523 and 425 on the heat dissipating portion 52 and the insulating resin 42 of the inverter-integrated motor 1 shown in the sixth embodiment, and fixes the fixing member 14 to the motor case 5. Is provided.

  According to this embodiment, the same effect as that of the sixth embodiment can be obtained, and the heat radiating portion 52 can be brought into contact with the insulating resin 42 with a constant pressing force. Furthermore, the insulating resin 42 and the heat radiating portion 52 can be taper-fitted, and the insulating resin 42 can be pressed against the insertion hole 521 inside the motor case of the heat radiating portion 52 by a bolt axial force.

  Thereby, the pressing force of the heat radiation part 52 against the insulating resin 42 can be maintained over a long period of time, and the reliability and durability can be improved.

(Eighth embodiment)
Next, an eighth embodiment of the present invention will be described. The eighth embodiment of the present invention is different from the sixth embodiment in the shape of the insertion holes of the insulating resin 42 and the heat radiation part 52. Hereinafter, the difference will be mainly described.

  FIG. 10 is a longitudinal sectional view of a main part of the inverter-integrated motor 1 according to the present embodiment.

  As shown in FIG. 10, in this embodiment, the guide surface 813 of the guide part 812 is tapered so as to be inclined in two stages. And the taper surface 52a, 52b which inclines in two steps according to the inclination of the guide surface 813 of the guide part 812 in the outer periphery of the thermal radiation part 52 was formed.

  Thus, when the inverter case 8 is assembled to the motor case 5, as shown in FIG. 11, the tapered surface 52a formed on the outer periphery of the heat radiating portion 52 stepwise along the tapered guide surface 813 of the guide portion 812. , 52b can be slid upward in the figure to fit the projection 522 of the heat dissipating part 52 into the fitting part 811 of the inverter case 8. Thereby, the thermal radiation part 52 can be closely_contact | adhered with the insulation resin 42 with fixed pressing force, and the effect similar to 6th Embodiment can be acquired.

  Note that the present invention is not limited to the above-described embodiment, and it is obvious that various modifications can be made within the scope of the technical idea.

DESCRIPTION OF SYMBOLS 1 Inverter integrated motor 2 Motor 3 Inverter 4 Power distribution part 5 Motor case 8 Inverter case 10 O-ring (seal)
12 Heat conduction member 13 Nut (fastening member)
14 Fixing member (fixing part)
41 Bus bar 42 Insulating resin (insulating member)
44 Motor feed line (electric wire)
52 Heat dissipation part (heat transfer part)
82 Fitting groove (fitting part)
425 Tapered surface 522 Protrusion 523 Tapered surface

Claims (7)

An inverter integrated motor that integrates a motor and an inverter,
An inverter case that houses the inverter therein;
A bus bar which is fixed to the inverter case and is provided so that a part protrudes outside the inverter case, and electrically connects the inverter and the motor, and an insulating member which covers a part of the bus bar A power distribution unit including
A motor case for supporting the inverter case and accommodating the motor therein;
Provided in the motor case, a heat transfer portion which heat before Symbol the bus bar through the insulating member in close contact with the outer peripheral surface of the insulating member which projects outside the inverter case is transmitted,
An inverter-integrated motor comprising: The heat transfer part includes a protruding part protruding in a protruding direction from the inverter case of the power distribution part,
The inverter case includes a fitting portion in which the protruding portion is fitted via a seal.
The inverter-integrated motor according to claim 1. The power distribution unit includes a tapered surface on an outer peripheral surface of the insulating member ,
The heat transfer portion includes a tapered surface that is provided so as to face the tapered surface of the insulating member and that is tapered to the tapered surface.
The inverter-integrated motor according to claim 1 or 2, wherein the motor is integrated with an inverter. The power distribution unit further comprises a conductive line for connecting the bus bar and the said motor,
Before Symbol insulating member is provided with a fastening member for fastening the wire to the bus bar,
The inverter-integrated motor according to any one of claims 1 to 3, wherein the motor is integrated with an inverter. The motor case includes a fixing portion that is fastened to a portion of the power distribution unit that protrudes to the outside of the inverter case and fixes the power distribution unit.
The inverter-integrated motor according to any one of claims 1 to 3, wherein the motor is integrated with an inverter. The power distribution unit is fixed to the inverter case so as to be able to move in a direction perpendicular to the projecting direction from the inverter case.
The inverter-integrated motor according to any one of claims 1 to 5, wherein the inverter-integrated motor is provided. The insulating member and the heat transfer section are in close contact with each other through a heat conductive member that promotes heat conduction.
The inverter-integrated motor according to any one of claims 1 to 6, wherein the inverter-integrated motor is provided.

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