JP2023100188A - Rotary machine - Google Patents

Abstract

To provide a motor capable of cooling electrical components more efficiently than the conventional art.SOLUTION: A motor comprises: a rotary machine housing that houses a rotor and a stator; an electrical housing 113 that houses a switching unit which is a high-speed semiconductor unit, being adjacent to the rotary machine housing at the other side, among one side and the other side in an axial direction (a direction of an arrow A, B) parallel to a rotation axial line of the rotor; an electrical cover that covers an opening facing the other side, at an axial other side end of the electrical housing; and an electrical coolant passage in which coolant for cooling the switching unit in the electrical housing flows, a part of the electrical coolant passage in a coolant flow direction being arranged in the electrical housing. A semiconductor module 164 of the switching unit configures at least a part of a wall. In at least a part of the electrical coolant passage, the internal coolant is directly in contact with the semiconductor module.SELECTED DRAWING: Figure 6

Description

The present invention relates to rotating machines such as motors.

Conventionally, a rotating machine housing containing a rotor and a stator, an electrical housing containing electrical components, an electrical component cover closing an opening of the electrical component housing, and an electrical component through which a coolant flows for cooling the electrical components in the electrical component housing or the electrical component cover. There is known a rotating machine provided with a coolant flow path for cooling.

For example, a motor as a rotating machine described in Patent Document 1 includes a frame as a rotating machine housing, a first casing as an electrical housing, a cover as an electrical cover, and a second cooling fluid path as a coolant channel for electrical components. Prepare. The frame accommodates a rotor as a rotor and a stator as a stator. The first housing accommodates a semiconductor switching element, which is an electrical component, and is adjacent to the rotating machine housing on the other side of one side and the other side in the axial direction parallel to the rotation axis of the stator. . In addition, the first housing has an opening facing the other side at the other end in the axial direction. The cover is fixed to the first housing so as to close the opening of the first housing. The second cooling liquid path is made of a pipe material and is arranged in the first housing in a manner to contact the semiconductor switching element. A coolant, which is a coolant, flows through the second coolant passage.

According to the motor having such a configuration, the semiconductor switching element that generates heat as it is driven can be cooled by the coolant in the second coolant passage that contacts the semiconductor switching element.

JP 2011-147253 A

However, in recent years, when motors have increased their rotation speed and torque, the amount of heat generated by electrical components such as semiconductor switching elements tends to increase, so there is a demand for more efficient cooling of electrical components. be done.

SUMMARY OF THE INVENTION The present invention has been made in view of the above background, and an object of the present invention is to provide a rotating machine capable of cooling electrical components more efficiently than conventionally.

In order to achieve the above object, one aspect of the present invention is to provide a rotating machine housing that houses a rotor and a stator, and one side in the axial direction that houses electrical components and is parallel to the rotation axis of the rotor. an electrical equipment housing adjacent to the rotating machine housing on the other side of the other side; an electrical equipment cover closing an opening facing the other side at the end of the electrical equipment housing on the other side in the axial direction; A rotating machine comprising: a coolant flow path for cooling an electrical component inside a cover; and forming at least the wall of the part, and in at least the part of the electrical component coolant channel, the internal coolant is in direct contact with the electrical component.

ADVANTAGE OF THE INVENTION According to this invention, it has the outstanding effect that an electrical component can be cooled more efficiently than before.

It is a figure which shows typically the internal structure of the motor which concerns on embodiment. It is a side view which shows the motor cover of the same motor, a motor housing, an electrical equipment housing, an electrical equipment cover, and a shaft. Fig. 2 is an exploded perspective view showing the electrical equipment housing from the rear side in the axial direction; Fig. 2 is an exploded perspective view showing the electrical housing, the cover/casing unit, and the switching unit of the motor from the rear side in the axial direction; It is a perspective view which shows the same switching unit. It is a cross-sectional view showing the electrical equipment housing. It is a top view which shows the electrical equipment housing and a drive shaft from the rear side of an axial direction. It is a longitudinal cross-sectional view showing a motor housing, a rotor, a stator, and a motor shaft of the same motor. It is a top view which shows the electrical equipment housing from the front side of an axial direction.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In order to facilitate the understanding of the description in the embodiments, structures and elements other than the main part of the present invention will be described with simplification or omission. Moreover, in the drawings, the same reference numerals are given to the same elements. It should be noted that the shape, dimensions, etc. of each element shown in the drawings are schematically shown, and do not represent the actual shape, dimensions, etc.

FIG. 1 is a diagram schematically showing the internal structure of a motor 1 according to an embodiment. FIG. 2 is a side view showing the motor cover 75 of the motor 1, the motor housing 10, the electrical equipment housing 113, the electrical equipment cover 70, and the motor shaft 6. FIG.

As shown in FIGS. 1 and 2, the motor 1 includes a motor cover 75, a motor housing 10, an electrical housing 113, an electrical cover 70, and a motor shaft 6. As shown in FIG. The motor housing 10 includes a rotatable rotor 2, a stator 3 that accommodates the rotor 2 in its own hollow, and a motor that passes through the rotor 2 and rotates integrally with the rotor 2 so as to be positioned on the rotation axis Ax. The shaft 6 is accommodated in its own internal space.

The motor cover 75, the motor housing 10, the electrical housing 113, and the electrical cover 70 constitute a housing 105 as a whole.

Hereinafter, the direction along the rotation axis Ax of the rotor 2 and the direction parallel thereto will be referred to as the axial direction. In the axial direction, the motor cover 75 side (load side), which will be described later, is called the front side (one side), and the motor cover 75 side (anti-load side) is called the rear side (other side). The front side is an example of one side in the present invention, and the rear side is an example of the other side in the present invention.

The motor housing 10 has an opening facing the front at the front end in the axial direction and an opening facing the rear at the rear end in the axial direction. Of these openings, the opening on the front side is closed by the motor cover 75 . Also, the opening on the rear side is closed by the electrical housing 113 .

A coil (not shown) is wound around the stator 3 . A permanent magnet (not shown) is arranged in the rotor core of the rotor 2 . A motor 1 is an inner rotor type motor, and a stator 3 is arranged on the outer periphery of a rotor 2 with a small air gap therebetween. In the motor housing 10 , the magnetic field of the stator 3 is switched in order by current control of the coil, so that the rotor 2 rotates around the motor shaft 6 due to the attraction or repulsion force with the magnetic field of the rotor 2 . In the motor shaft 6 , the axial front side is rotatably supported by a bearing 5 and the rear side is rotatably supported by a bearing 4 .

The electrical housing 113 is fixed to the motor housing 10 adjacent to the axial rear end of the motor housing 10 . Various electrical components for controlling rotational driving of the motor shaft 6 and the rotor 2 are arranged in the electrical component housing 113 . Examples of various electrical components include semiconductor switching elements (IGBTs, etc.), gate substrates, capacitors, discharge resistors, control substrates, and the like. These electrical components convert the DC voltage from the battery (not shown) into AC during power running and supply it to the coil of the stator 3, and convert the AC from the coil of the stator 3 into DC to the battery during regeneration. bear.

The electrical equipment housing 113 has an opening 12 facing the rear side at the rear end in the axial direction. The opening 12 is closed by the electrical equipment cover 70 .

The housing 105 is composed of the motor cover 75, the motor housing 10, the electrical housing 113, and the electrical housing 70, and is attached to the vehicle body (not shown) of the electric vehicle. Each of the motor cover 75, the motor housing 10, the electrical housing 113, and the electrical device cover 70 is a cast product made of a conductive metal such as an aluminum alloy, and has electrical conductivity. Therefore, the housing 105 is electrically connected to the vehicle body through an attachment portion (not shown) for the vehicle body, and has the same ground potential as the vehicle body. Note that the housing 105 and the vehicle body may be electrically connected by a ground wire, if necessary.

The electrical housing 113 serves both as a part of the rotating machine housing and as an electrical housing. More specifically, the axial front end of the electrical housing 113 forms an axial rear internal space 113t of the rotary machine housing. Further, the rear side in the axial direction of the electrical equipment housing 113 is provided with an internal space 113u for accommodating electrical components. The former internal space 113t and the latter internal space 113u are separated by a partition wall 113a.

FIG. 3 is an exploded perspective view showing the electrical equipment housing 113 from the rear side in the axial direction. The electrical housing 113 includes a sensor casing 113b integrally formed with the partition wall 113a. That is, the sensor casing 113b is part of the partition wall 113a. The axial rear end of the sensor casing 113b protrudes rearward a little from the axial rear end face of the partition wall 113a. The sensor housing casing 113b is integrally formed with the partition wall 113a. The axial rear end of the sensor casing 113b opens toward the rear side. A peripheral wall of the sensor casing 113b protrudes in an embossed manner toward the inside of the motor section space. A rotation detection sensor 130 such as a resolver is accommodated in the sensor casing 113b. A motor shaft (6 in FIG. 1) is inserted into the central through hole of the rotation detection sensor 130. As shown in FIG. The rotation detection sensor 130 indirectly detects the rotation of the rotor (2 in FIG. 1) that rotates together with the motor shaft (6 in FIG. 1) by detecting the rotation of the motor shaft (6 in FIG. 1).

A cover-cum-casing unit 140 is arranged in the inner space 113u on the rear side of the electrical equipment housing 113 . The cover-cum-casing unit 140 is made of cast metal such as aluminum, and includes a cover portion 141 and a passage casing portion 142 arranged on the rear side of the cover portion 141 in the axial direction. The cover/casing unit 140 is fixed to the rear side of the sensor casing 113b by a plurality of bolts 145. As shown in FIG. By this fixation, the cover portion 141 of the cover/casing unit 140 closes the opening on the rear side in the axial direction of the sensor casing 113b. In this state, the joint surface 113c, which is the axial rear end face of the sensor casing 113b, and the joint face, which is the front end face of the cover portion 141 serving as the sensor cover, are joined. The flow path casing portion 142 of the cover/casing unit 140 has a rectangular shape and includes a rectangular intermediate space 142c. The flow path casing part 142 is open toward the rear side in the axial direction, and a relay space 142c is arranged on the front side of this opening.

Each of the sensor casing 113b and the cover and casing unit 140 comprises an axially extending first fluid passage (113f, 142a) and an axially extending second fluid passage (113g, 142b). In addition, a coolant such as cooling water is provided between the first liquid path 113f and the second liquid path 113g of the sensor casing 113b, the first liquid path 142a and the second liquid path 142b of the cover/casing unit 140, and the relay space 142c. is washed away.

A communication port opening toward the rear side is provided at the axial rear end of each of the first liquid passage 113f and the second liquid passage 113g of the sensor casing 113b. On the other hand, the front end of each of the first fluid path 142a and the second fluid path 142b of the cover/casing unit 140 is provided with a communication port that opens toward the front side. When the cover/casing unit 140 is fixed to the sensor casing 113b, the first fluid path 142a of the cover/casing unit 140 and the first fluid path 113f of the sensor casing 113b communicate with each other through the communication port. . In addition, the second fluid path 142b of the cover/casing unit 140 and the second fluid path 113g of the sensor casing 113b communicate with each other via the communication port.

A ring-shaped ring groove 113d recessed toward the axial front side and a crescent-shaped gasket capture groove 113e recessed toward the axial front side are arranged on the joint surface 113c of the sensor casing 113b. . 113 d of ring grooves are arrange|positioned in the aspect surrounding the communication opening of 113 f of 1st liquid paths of the sensor casing 113b. A first O-ring 131 is fitted in the ring groove 113d.

The first O-ring 131 surrounds the communication opening of the first fluid passage 113f of the sensor casing 113b and the communication opening of the first fluid passage 142a of the cover/casing unit 140, respectively. In addition, the first O-ring 131 is interposed between the joint surface 113 c of the sensor casing 113 b and the joint surface of the cover portion 141 of the cover/casing unit 140 . As a result, leakage of refrigerant from the communication port of the first liquid passage 113f of the sensor casing 113b and the communication port of the first liquid passage 142a of the cover/casing unit 140 through the gap between the two joint surfaces is suppressed.

A ring-shaped ring groove 113h recessed toward the front side in the axial direction is arranged on the joint surface 113c of the sensor casing 113b. The ring groove 113h surrounds the communication port of the second liquid path 113g. A second O-ring 132 is fitted in the ring groove 113h. The second O-ring 132 surrounds the communication opening of the second fluid passage 113g of the sensor casing 113b and the communication opening of the second fluid passage 142b of the cover/casing unit 140, respectively. In addition, the second O-ring 132 is interposed between the joint surface 113 c of the sensor casing 113 b and the joint surface of the cover portion 141 of the cover/casing unit 140 . As a result, leakage of refrigerant from the communication opening of the second liquid passage 113g of the sensor casing 113b and the communication opening of the second liquid passage 142b of the cover/casing unit 140 through the gap between the joint surfaces is suppressed.

A relay connector 143 is fixed to the axial rear end face of the cover portion 141 of the cover/casing unit 140 . Sensor connector 130a of rotation detection sensor 130 and relay connector 143 are electrically connected by a harness (not shown).

A sealing material made of a solidified liquid gasket is arranged on the joint surface 113c of the sensor casing 113b so as to surround the hollow of the sensor casing 113b with a predetermined width. This sealing material is interposed between the joint surface 113 c of the sensor casing 113 b and the joint surface of the cover portion 141 of the cover/casing unit 140 . By sealing the hollow of the sensor casing 113b with this intervention, the airtightness of the hollow can be improved at low cost.

In the joint surface 113c of the sensor casing 113b, the gasket capture groove 113e is arranged between the sealing material and the first O-ring 131 in the planar direction. When the liquid gasket applied to the joint surface 113c of the sensor casing 113b is solidified, it becomes a sealing material. When the joint surface 113c of the sensor casing 113b and the joint surface of the cover portion 141 of the cover/casing unit 140 are joined together, the liquid gasket spreads in the planar direction between the joint surfaces. Even if the liquid gasket expands in this manner, the expanded portion of the liquid gasket flows into the gasket capture groove 113e before reaching the first O-ring 131, and further expansion is prevented. In this manner, the gasket capture groove 113e suppresses adhesion of the liquid gasket to the first O-ring 131, thereby suppressing deterioration of the first O-ring 131 due to adhesion of the liquid gasket.

FIG. 4 is an exploded perspective view showing the electrical housing 113, the cover/casing unit 140, and the switching unit 162 from the rear side in the axial direction. FIG. 5 is a perspective view showing the switching unit 162. As shown in FIG. FIG. 6 is a sectional view showing the electrical housing 113. As shown in FIG.

A joint surface 142 e is arranged at the rear end of the flow path casing portion 142 of the cover/casing unit 140 . A switching unit 162 is bonded to the bonding surface 142e. Specifically, a plurality of female screw holes 142d are arranged on the joint surface 142e, and the switching unit 162 is screwed to the joint surface 142e by screwing a male screw 169 into each of the female screw holes 142d. and spliced. This joining closes the opening of the flow path casing portion 142 of the cover/casing unit 140 .

A switching unit 162 as an electrical component includes a gate substrate 163 and a semiconductor module 164 sealed with an exterior made of insulating resin. A plurality of semiconductor switching elements such as IGBTs (Insulated Gate Bipolar Transistors) are mounted inside the semiconductor module 164 . The semiconductor module 164 is fixed to the surface of the gate substrate 163 opposite to the mounting surface.

A control board (not shown) is arranged in the internal space 113u of the electrical housing 113 . This control board and the relay connector 143 are electrically connected by a harness (not shown). Through this electrical connection, a detection signal from the rotation detection sensor 130 is sent to the control board via the relay connector 143 . Furthermore, this control board and the gate board 163 are electrically connected by a second harness (not shown). Through this electrical connection, ON/OFF command signals for high-speed switching elements are transmitted from the control board to the gate board 163 .

The semiconductor module 164 includes three DC anode terminals 164a and three DC cathode terminals 164b. Semiconductor module 164 also includes a U-phase terminal 164U, a V-phase terminal 164V, and a W-phase terminal 164W for an AC three-phase power supply. Each of the three DC anode terminals 164a is connected to the anode of the DC external power supply (the battery described above). A cathode of a DC external power supply is connected to each of the three DC cathode terminals 164b. The switching unit 162 converts DC power supplied from an external DC power supply into AC three-phase power of any frequency. U-phase, V-phase and W-phase in the AC three-phase power supply are output from U-phase terminal 164U, V-phase terminal 164V and W-phase terminal 164W.

U-phase terminal 164U, V-phase terminal 164V, and W-phase terminal 164W are connected via a U-phase relay bus bar (not shown), a V-phase relay bus bar (not shown), and a V-phase relay bus bar (not shown). . The U-phase, V-phase and W-phase are sent to the coils of the stator 3 of the motor section 102 via the U-phase busbar 161U, the V-phase busbar 161V and the W-phase busbar 161W.

A partition wall 113a in the electrical equipment housing 113 is provided with a liquid inflow path 113j (see FIG. 6) formed in the hollow of the housing and a liquid outflow path 113k (see FIG. 6) formed in the hollow of the housing. The liquid inflow path 113j communicates with the second liquid path 113g of the sensor casing 113b. Also, the liquid outflow path 113k communicates with the first liquid path 113f of the sensor casing 113b. As indicated by arrows in FIG. 6, coolant such as cooling water sent from the outside flows into the liquid inflow path 113j. The refrigerant that has flowed in flows through the second fluid path 113g of the sensor casing 113b and the second fluid path 142b of the cover/casing unit 140 into the intermediate space 142c. Further, the refrigerant in the intermediate space 142c flows out to the outside through the first liquid passage (142a in FIG. 3) of the cover/casing unit 140, the first liquid passage 113f of the sensor casing 113b, and the liquid outflow passage 113k. do.

The semiconductor module 164 of the switching unit 162 is heated by driving the plurality of semiconductor switching elements inside. On the other hand, the coolant flowing through the intermediate space 142c directly cools the switching unit 162 by direct contact with the back surface of the semiconductor module 164 of the switching unit 162 toward the first liquid path (142a in FIG. 3). Such direct cooling effectively cools the semiconductor switching elements in the semiconductor module 164 .

In the motor 1, each fluid path described below constitutes an electrical equipment coolant path.
・Liquid inflow path 113j
- 113g of 2nd liquid paths of the sensor casing 113b
The second fluid path 142b of the cover/casing unit 140
・Relay space 142c
- The first fluid path 142a of the cover/casing unit 140
- 113f of 1st liquid paths of the sensor casing 113b
・Liquid outflow path 113k

Refrigerant such as cooling water is fed into the electrical equipment refrigerant flow path 113j by a pump (not shown). Among the electrical component coolant channels, the relay space 142c, the first liquid channel 142a of the cover/casing unit 140, and the second liquid channel 142b of the cover/casing unit 140 are located in the internal space 113u (accommodating electrical components) in the electrical component housing 113. space). On the other hand, the liquid inflow path 113j, the liquid outflow path 113k, the first liquid path 113f of the sensor casing 113b, and the second liquid path 113g of the sensor casing 113b form an internal space 113t in the electrical housing 113 (functioning as a part of the rotating machine housing). space).

The cooling medium flowing through the intermediate space 142c and the semiconductor module 164 of the switching unit 162 form part of the wall of the intermediate space 142c. The coolant in the relay space 142c flows downstream while directly contacting the rear surface of the semiconductor module 164. As shown in FIG.

In such a configuration, compared to a conventional configuration (for example, the configuration described in Patent Document 1) in which the wall of the electrical component coolant flow path made of a pipe member is interposed between the coolant in the electrical component coolant flow channel and the electrical component, The electrical components (switching unit 162) can be efficiently cooled.

In the electrical equipment housing 113, the end on the front side in the axial direction (arrow A side in the figure) of the partition wall 113a functions as a part of the rotary machine housing. In addition, the liquid inflow path 113j functions as an upstream end portion of the electrical equipment coolant flow path in the coolant flow direction. In addition, the liquid outflow path 113k functions as a downstream end portion in the refrigerant flow direction of the electrical equipment refrigerant flow path.

As shown in the figure, the liquid inflow path 113j and the liquid outflow path 113k are arranged on the front side in the axial direction with respect to the rear side surface of the partition wall 113a. With such a configuration, the degree of freedom in layout of various electrical components in the electrical component housing 113 can be further improved. Specifically, in the electrical component housing 113, an empty space is less likely to occur in the axial rear side (arrow B side) portion forming a space (internal space 113u in FIG. 1) where many electrical components are arranged. . By arranging the liquid inflow path 113j and the liquid outflow path 113k on the front side of the partition wall 113a, the degree of freedom in layout of various electrical components in the electrical component housing 113 can be further improved.

FIG. 7 is a plan view showing the electrical housing 113 and the drive shaft 106 from the rear side in the axial direction. As shown in the figure, the drive shaft 106 is arranged on the side of the electrical housing 113 . The electrical housing 113 has a recess 113p for avoiding contact with the drive shaft 106. As shown in FIG. Drive shaft 106 is arranged in such a manner that part of the peripheral surface of drive shaft 106 is positioned in the recess of recess 113p. With such a configuration, the distance between the drive shaft 106 and the electrical equipment housing 113 can be made closer, and the size of the motor 1 can be reduced, as compared with the case where the recessed portion 113p is not provided.

As shown in the figure, the shape of the liquid outflow path 113k is not straight on the plane of the partition wall 113a but bent like a crank. With such a configuration, it is possible to improve the degree of freedom in layout of various electrical components within the electrical component housing 113 . Specifically, the double-headed arrow in the figure indicates the vertical direction. The direction of arrow C indicates upward, and the direction of arrow D indicates downward. The motor 1 is designed on the premise that it is installed with the electrical housing 113 in the posture shown in FIG. In the electrical equipment housing 113, it is desirable to employ a layout in which the cover/casing unit 140 is positioned at the center in the vertical direction as shown in the figure. In the layout described above, the fluid inflow path 113j is arranged near the center in the vertical direction of the electrical equipment housing 113 as shown in the figure, so that the fluid inflow path 113j extends horizontally and the length of the fluid inflow path 113j increases. can be the shortest. However, in the arrangement described above, if a layout in which the liquid outflow path 113k is positioned on the axis L of the liquid inflow path 113j is adopted, the position of the liquid outflow path 113k and the position of the drive shaft 106 will compete. Therefore, the liquid outflow path 113k cannot be arranged. Therefore, the liquid inflow path 113j, the liquid outflow path 113k, and the cover/casing unit 140 need to be arranged at positions that are biased upward or downward. It is very difficult to adopt such arrangement. On the other hand, if the liquid outflow path 113k is shaped like a crank as shown in FIG. Conflict between the position of 113k and the position of drive shaft 106 can be avoided. Therefore, it is possible to improve the degree of freedom in layout of various electrical components in the electrical component housing 113 .

FIG. 8 is a longitudinal sectional view showing the motor housing 10, rotor 2, stator 3, and motor shaft 6. FIG. The motor housing 10 includes a first oil passage 10a, a second oil passage 10b, a front discharge hole 10c, and a rear discharge hole 10d. Each of the first oil passage 10a, the second oil passage 10b, the front side discharge hole 10c, and the rear side discharge hole 10d is hollow provided in the motor housing 10. As shown in FIG.

Each of the first oil passage 10a and the second oil passage 10b functions as a part of a rotating machine refrigerant passage through which cooling oil as a refrigerant for cooling the internal space of the motor housing 10 flows. The first oil passage 10a and the second oil passage 10b are connected to each other via a relay oil passage (not shown) provided in the motor housing (75 in FIG. 2). Further, the first oil passage 10a and the second oil passage 10b each extend in the axial direction and are arranged in a point-symmetrical manner with respect to the rotation axis Ax.

The cooling oil stored in the internal space of the motor housing 10 is discharged into the first oil passage 10a while being sucked by an electric oil pump (not shown). In the first oil passage 10a, cooling oil flows axially from the rear side (arrow B side) toward the front side (arrow A side) as indicated by arrow E in the figure. And it flows into the 2nd oilway 10b via the above-mentioned intermediate oilway. In the second oil passage 10b, the cooling oil flows from the front side to the rear side in the axial direction, as indicated by an arrow F in the figure.

The front-side discharge hole 10 c communicates with the front-side portion of the second oil passage 10 b in the axial direction and the internal space of the motor housing 10 . A part of the cooling oil flowing through the second oil passage 10b is discharged toward the coil of the stator 3 via the front side discharge hole 10c.

The rear-side discharge hole 10 d communicates with a rear-side portion of the second oil passage 10 b in the axial direction and the inner space of the motor housing 10 . A part of the cooling oil flowing through the second oil passage 10b is discharged toward the coil of the stator 3 via the rear side discharge hole 10d.

FIG. 9 is a plan view showing the electrical housing 113 from the front side in the axial direction. The partition wall 113a of the electrical equipment housing 113 has a plurality of ribs 113a-1 for reinforcing the partition wall 113a on the front surface in the axial direction. Each of the plurality of ribs 113a-1 extends along the radial direction centering on the rotation axis Ax and is arranged in a manner aligned along the circumferential direction centering on the rotation axis Ax. Of the plurality of ribs 113a-1, two ribs 113a-1 adjacent to each other in the circumferential direction form grooves 113a-2 extending in the radial direction. The radial outer end of the groove 113a-2 is connected to the axial rear end of the second oil passage (10b in FIG. 8) of the motor housing (10 in FIG. 8). The cooling oil that has flowed to the axial rear end of the second oil passage flows into the radially outer end of the groove 113a-2. The groove 113a-2 guides the cooling oil toward the bearing 4 from the radially outer side to the inner side. Thereby, the cooling efficiency of the bearing portion of the motor shaft 6 can be improved. In addition, each of the two ribs 113a-1 can also be used as a side wall of the groove 113a-2 to reduce costs.

Although an example in which the present invention is applied to the motor 1 has been described, the present invention may be applied to a generator (dynamo). The present invention is not limited to the above-described embodiments, and configurations different from the embodiments can be employed within the scope of application of the configurations of the present invention. The present invention provides unique effects for each of the aspects described below.

[First aspect]
A first aspect includes a rotating machine housing (for example, motor housing 10) that houses a rotor (for example, rotor 2) and a stator (for example, stator 3), and a rotating machine housing that houses electrical components and a rotation axis of the rotor (for example, rotation axis Ax). an electrical housing (e.g., electrical housing 113) adjacent to the rotary machine housing on the other side of the axial direction parallel to the An electrical cover (for example, an electrical cover 70) that closes an opening (eg, opening 12) facing the other side of the electrical housing at the other end in the axial direction, and a coolant for cooling the electrical components in the electrical housing or the electrical cover. A rotating machine (for example, a motor 1) including an electrical cooling medium flow path arranged in the electrical housing so that at least a portion of the coolant flow direction is arranged in the electrical housing, wherein the electrical component (eg, the switching unit 162) is: At least the part of the wall is configured, and the coolant inside the electrical equipment coolant channel is in direct contact with the electrical component in at least the part.

According to such a configuration, compared to the conventional configuration in which the wall of the electrical coolant channel made of a pipe material is interposed between the coolant in the electrical component coolant channel and the electrical component, the electrical component (switching unit 162 ) can be cooled.

[Second aspect]
A second aspect is a rotating machine having the configuration of the first aspect, in which an upstream end (eg, a liquid inflow path 113j) and a downstream end (eg, a liquid outflow path) in the coolant flow direction of the electrical component coolant flow path 113k) are arranged inside the rotary machine housing.

With such a configuration, it is possible to further improve the degree of freedom in layout of various electrical components in the electrical housing.

[Third aspect]
A third aspect is a rotating machine having the configuration of the second aspect, wherein the rotating machine housing includes a rotating machine coolant flow path through which a coolant for cooling the internal space flows, and the internal space of the rotating machine housing (eg, internal space 113t) and the internal space (eg, internal space 113u) of the electrical equipment housing (eg, partition wall 113a) has a plurality of ribs (eg, rib 113a-1) for reinforcing the partition wall. is provided on one side surface in the axial direction, and the plurality of ribs are arranged in a manner to extend along the radial direction centering on the rotation axis and line up along the circumferential direction centering on the rotation axis. Two ribs adjacent to each other in the circumferential direction among the plurality of ribs form grooves (for example, grooves 113a-2) extending in the radial direction, and the grooves form the rotary machine refrigerant flow path. It constitutes a part and is characterized by guiding the coolant from the outside in the radial direction to the inside.

With such a configuration, it is possible to improve the cooling efficiency of the bearing portion of the motor shaft, and to reduce the cost by using each of the two portions as the side wall of the groove.

[Fourth aspect]
In a rotating machine having the configuration of the third mode, the upstream end (for example, the liquid inflow path 113j) and the downstream end (for example, the liquid outflow path 113k) in the refrigerant flow direction of the electrical component refrigerant flow path and at least one of the shapes is a shape that does not extend linearly on the plane of the partition wall but bends like a crank.

With such a configuration, it is possible to further improve the degree of freedom in layout of various electrical components in the electrical housing.

Reference Signs List 1 motor (rotating machine) 2 rotor 3 stator 10 motor housing (part of rotating machine housing) 12 opening 70 electrical cover 113...Electrical housing (other part of rotating machine housing and electrical housing), 113a...Partition wall, 113a-1...Rib, 113a-2...Groove, 113j...Liquid inflow path (upstream end of electrical component coolant channel) 113k... liquid outflow channel (downstream end of electrical component coolant channel) 113f... first liquid channel of sensor casing (electric component coolant flow 113g... second fluid path of sensor casing (part of coolant flow path for electrical equipment) 142a... first fluid path of cover/casing unit (part of coolant flow path for electrical equipment) ), 142b...Second fluid path of the cover/casing unit (a part of the electrical component coolant channel), 142c...Relay space (a part of the electrical component coolant channel), 162...Switching unit ( electrical parts)

In order to achieve the above object, one aspect of the present invention is to provide a rotating machine housing that houses a rotor and a stator, and one side in the axial direction that houses electrical components and is parallel to the rotation axis of the rotor. an electrical equipment housing adjacent to the rotating machine housing on the other side of the other side; an electrical equipment cover closing an opening facing the other side at the end of the electrical equipment housing on the other side in the axial direction; A rotating machine comprising: an electrical component coolant flow path arranged in the electrical component housing for flowing a coolant for cooling the electrical component within a cover; constitutes at least the wall of the part, the internal coolant is in direct contact with the electrical component in at least the part of the electrical component coolant flow path, and the electrical component housing is an internal space of the rotating machine housing and A partition wall is provided for partitioning the interior space of the electrical equipment housing, the partition wall includes a plurality of ribs for reinforcing the partition wall on one side surface in the axial direction, and the plurality of ribs extend along the rotation axis. While extending along the radial direction centered on, arranged in a manner aligned along the circumferential direction centered on the rotation axis, among the plurality of ribs, two ribs adjacent to each other in the circumferential direction and a groove extending in the radial direction is formed, the groove constitutes a part of the coolant channel for the rotating machine, and guides the coolant from the outside in the radial direction to the inside.
Another aspect of the present invention provides a rotating machine housing that houses a rotor and a stator, and one side and the other side in an axial direction that houses electrical components and is parallel to the rotational axis of the rotor. , an electrical housing adjacent to the rotating machine housing on the other side; an electrical device cover closing an opening facing the other side at the other end in the axial direction of the electrical device housing; and electrical components in the electrical device housing or the electrical device cover. a coolant flow path for cooling the electrical component, wherein at least a portion of the coolant flow direction is arranged in the electrical component housing, wherein the electrical component includes at least the one the internal coolant directly contacts the electrical component in at least the part of the electrical component coolant flow path, and the electrical component housing comprises an internal space of the rotary machine housing and an interior of the electrical component housing. The partition wall has a sensor casing for housing a rotation detection sensor, and the sensor casing is provided with the electrical equipment coolant flow path.

Claims (4)

a rotating machine housing that houses a rotor and a stator; and a housing that houses electric components and is mounted on the rotating machine housing on the other side in the axial direction parallel to the axis of rotation of the rotor. an electrical component housing adjacent to the electrical component housing, an electrical component cover closing an opening facing the other side in the axial direction other end of the electrical component housing, a coolant for cooling the electrical components in the electrical component housing or the electrical component cover, and A rotating machine including an electrical component coolant flow path arranged in the electrical component housing at least part of the coolant flow direction,
The electrical component constitutes at least the partial wall,
A rotating machine, wherein the coolant inside directly contacts the electrical component in at least the part of the electrical component coolant channel. The rotating machine according to claim 1, wherein an upstream end and a downstream end of the electrical equipment coolant channel in a coolant flow direction are arranged inside the rotating machine housing. The rotating machine housing includes a rotating machine coolant flow path through which a coolant for cooling the internal space flows,
a partition wall that separates the internal space of the rotating machine housing and the internal space of the electrical equipment housing has a plurality of ribs on one side in the axial direction for reinforcing the partition wall,
A plurality of said ribs are arranged in a manner aligned along a circumferential direction centered on said rotation axis while extending along a radial direction centered on said rotation axis,
Two ribs adjacent to each other in the circumferential direction of the plurality of ribs form grooves extending in the radial direction,
3. The rotating machine according to claim 2, wherein the groove constitutes a part of the coolant flow path for the rotating machine and guides the coolant from the outside in the radial direction to the inside. At least one of the upstream end and the downstream end in the coolant flow direction of the electrical equipment coolant channel does not extend linearly on the plane of the partition wall, but has a crank shape. 4. The rotating machine according to claim 3, characterized in that it has a shape that is bent in a direction of .

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