JP2023088076A - Motor-driven compressor - Google Patents

Abstract

To provide a motor-driven compressor capable of suppressing an electric motor increasing in size in the axial direction of a stator core.SOLUTION: A U-phase electric wire 60u, a V-phase electric wire 60v, and a W-phase electric wire 60w are distributed and wound around a stator core 50 and delta-connected. The U-phase electric wire 60u has a first U-phase lead part 62u and a second U-phase lead part 63u. The V-phase electric wire 60v has a first V-phase lead part 62v and a second V-phase lead part 63v. The W-phase electric wire 60w has a first W-phase lead part 62w and a second W-phase lead part 63w. The second U-phase lead part 63u is drawn from the position separated from a connector 40 than a drawing position of the second V-phase lead part 63v and the second W-phase lead part 63w, in the circumferential direction of the stator core 50. The second U-phase lead part 63u is electrically connected to the first W-phase lead part 62w via the further inside than the drawing position of the second W-phase lead part 63w, in the circumferential direction of the stator core 50.SELECTED DRAWING: Figure 2

Description

The present invention relates to an electric compressor.

The electric compressor disclosed in Patent Document 1 includes a compressing section, an electric motor, a motor drive circuit, and a connector. The compression section compresses the fluid. The electric motor drives the compression section. The motor drive circuit drives the electric motor. The connector electrically connects the electric motor and the motor drive circuit.

The electric motor has a stator. The stator has a cylindrical stator core and coils in which a U-phase wire, a V-phase wire, and a W-phase wire are Y-connected (star-connected). The U-phase, V-phase, and W-phase wires each have a pair of leads on one side and the other. Each lead on one side of the U-phase wire, the V-phase wire, and the W-phase wire is connected to a connector. Each lead on the other side of the U-phase wire, the V-phase wire, and the W-phase wire is connected to each other as a neutral point.

Patent Document 2 discloses delta connection as another connection mode of the U-phase electric wire, the V-phase electric wire, and the W-phase electric wire. When adopting the delta connection as the connection mode of the U-phase electric wire, the V-phase electric wire, and the W-phase electric wire, the lead on one side of the U-phase electric wire and the lead on the other side of the V-phase electric wire are electrically connected. One lead of the V-phase wire and the other lead of the W-phase wire are electrically connected. One lead of the W-phase wire and the other lead of the U-phase wire are electrically connected.

JP 2019-140737 A JP 2006-094694 A

When the delta connection is employed, when each two leads of a U-phase wire, a V-phase wire, and a W-phase wire are electrically connected to leads of different phases, the leads tend to cross each other. If the leads cross each other, the size of the electric motor increases in the axial direction of the stator core, which may increase the size of the entire electric compressor.

An electric compressor for solving the above problems includes a compression section for compressing a fluid, a cylindrical stator core, and a coil in which a U-phase wire, a V-phase wire, and a W-phase wire are delta-connected by distributed winding. an electric motor for driving the compression unit, a motor drive circuit for driving the electric motor, and a connector for electrically connecting the electric motor and the motor drive circuit, wherein the connector is , provided to face the coil end of the coil positioned at one end in the axial direction of the stator core, and the U-phase wire, the V-phase wire, and the W-phase wire each have a pair of leads on one side and the other side. are electrically connected to the connector via the pair of leads, and the leads on the one side of the U-phase wire, the V-phase wire, and the W-phase wire extend radially of the stator core The U-phase, V-phase, and W-phase wires are pulled out from the stator core in order from the outside to the inside, and the leads on the other side of the U-phase wire, the V-phase wire, and the W-phase wire have the diameters. They are pulled out from the stator core in the order of U-phase, V-phase, and W-phase from the outer side to the inner side of the direction, and are connected to the connector across the lead-out position of the lead on one side of the same phase in the circumferential direction of the stator core. , the lead on the other side of the U-phase electric wire is pulled out from a position farther from the connector than the lead-out positions of the other leads of the V-phase electric wire and the W-phase electric wire in the circumferential direction, and It is a gist to electrically connect to the lead on the one side of the W-phase electric wire via a position inside the lead position of the lead on the other side of the W-phase electric wire in the radial direction.

The leads on one side of the U-phase electric wire, the V-phase electric wire, and the W-phase electric wire are arranged in the order of U-phase, V-phase, and W-phase from the outer side to the inner side in the radial direction. Further, the leads on the other side of the U-phase electric wire, the V-phase electric wire, and the W-phase electric wire are arranged in order of the U-phase, the V-phase, and the W-phase from the outer side to the inner side in the radial direction. At this time, for example, the lead on the other side of the U-phase wire may be pulled out from a position closer to the connector than the lead positions on the other side of the V-phase wire and the W-phase wire in the circumferential direction. In this case, when the lead on the other side of the U-phase wire and the lead on the one side of the W-phase wire are electrically connected, the lead on the other side of the U-phase wire is connected to the lead on the other side of the W-phase wire, for example. cross.

On the other hand, in the above configuration, the lead on the other side of the U-phase wire is drawn out from a position further from the connector in the circumferential direction than the lead positions of the leads on the other side of the V-phase wire and the W-phase wire. . In addition, the lead on the other side of the U-phase wire is electrically connected to the lead on the one side of the W-phase wire via a radially inner side than the lead position of the lead on the other side of the W-phase wire. . Therefore, when electrically connecting the lead on the other side of the U-phase wire and the lead on the one side of the W-phase wire, the lead on the other side of the U-phase wire crosses the lead on the other side of the W-phase wire. is avoided. That is, crossing of the leads is avoided when delta-connecting. Therefore, it is possible to prevent the electric motor from increasing in size in the axial direction of the stator core.

In the above electric compressor, the lead on the one side of the V-phase wire is arranged in the circumferential direction at a position where the leads on the one side and the other side of the U-phase wire and the W-phase wire are pulled out. The lead on the one side of the U-phase wire and the lead on the other side of the V-phase wire are pulled out at a position near the connector, and the lead on the one side of the U-phase wire and the lead on the other side of the V-phase wire are arranged on the one side and the other side of the W-phase wire in the circumferential direction. may be pulled out between the pull-out positions of each lead.

Compared to the case where the lead on the other side of the V-phase electric wire and the lead on the one side of the U-phase electric wire are not pulled out between the pull-out positions of the lead on the one side and the other side of the W-phase electric wire in the circumferential direction, It is possible to reduce the difference in length between the U-phase wire, the V-phase wire, and the W-phase wire. Therefore, the difference in electrical resistance between the U-phase wire, the V-phase wire, and the W-phase wire can be reduced.

In the above electric compressor, the connector has a U-phase terminal, a V-phase terminal, and a W-phase terminal, and the U-phase terminal, the V-phase terminal, and the W-phase terminal extend from the outer side to the inner side in the radial direction. U-phase, V-phase, and W-phase are arranged in this order toward the connector, and an insulating U-phase tube, V-phase tube, and W-phase tube are connected to the connector while extending along the circumferential direction, In the radial direction, the U-phase tube, the V-phase tube, and the W-phase tube are arranged in order of U-phase, V-phase, and W-phase from the outer side to the inner side in the radial direction. The one-side lead of the V-phase wire and the other-side lead of the V-phase wire are connected to the U-phase terminal while passing through the U-phase tube, and the one-side lead of the V-phase wire and the W-phase wire is connected to the V-phase terminal while passing through the V-phase tube, and the one-side lead of the W-phase wire and the other-side lead of the U-phase wire are connected to the W-phase It may be connected to the W-phase terminal while passing through the tube.

By electrically connecting the two leads through the terminals, the connection work becomes easier than when the two leads are directly connected without the terminals. In addition, by inserting the two leads through the tube, the leads are less likely to come loose compared to the case where the leads are not inserted through the tube, making the leads easier to handle. In addition, by arranging the tubes in the radial direction, it is possible to prevent the leads from the pull-out position to the connector from crossing each other.

In the above electric compressor, the lead on the one side of the U-phase wire is pulled out from the stator core inside the lead on the other side in the radial direction of the lead on the other side of the U-phase wire. the lead on the other side of the V-phase electric wire is pulled out from the stator core on the inner side in the radial direction of the lead on the other side of the V-phase electric wire, and the lead on the one side of the W-phase electric wire extends on the other side of the W-phase electric wire. may be pulled out from the stator core on the inner side in the radial direction than the leads of the stator core.

The above configuration facilitates the wiring work of each lead. Further, the lead on one side of the W-phase electric wire is drawn out from the inside in the radial direction from the lead position of the lead on the other side of the W-phase electric wire. For this reason, compared to the case where the lead on the other side of the W-phase electric wire is drawn out from the inner side in the radial direction of the lead-out position of the lead on the one side of the W-phase electric wire, the lead on the other side of the W-phase electric wire is pulled out. A wide space can be secured inside the position for the lead on the other side of the U-phase electric wire to pass. Therefore, the lead on the other side of the U-phase electric wire is less likely to protrude inside the stator core.

According to the present invention, it is possible to avoid an increase in size of the electric motor in the axial direction of the stator core.

It is a sectional side view of an electric compressor. It is a front view of a stator. It is a schematic diagram for demonstrating wave winding. FIG. 4 is a schematic diagram for explaining a lead-out position of a lead portion;

An embodiment embodying an electric compressor will be described below with reference to FIGS. 1 to 4. FIG.
<<Electric Compressor>>
As shown in FIG. 1, the electric compressor 10 includes a housing 11, a shaft support member 15, a rotating shaft 16, a compression section 17, an electric motor 18, a motor drive circuit 19, an airtight terminal 30, and a connector. 40.

<Housing>
The housing 11 has a motor housing 12 , a discharge housing 13 and a cover 14 .

The motor housing 12 has a cylindrical shape with a bottom. The motor housing 12 has a bottom wall 12a and a peripheral wall 12b extending cylindrically from the outer peripheral edge of the bottom wall 12a.
The bottom wall 12a has a housing recess 20. As shown in FIG. The accommodation recess 20 is a portion recessed from the inner surface 121 of the bottom wall 12a.

The bottom wall 12 a has a through hole 21 . The through hole 21 penetrates the bottom wall 12a. The through hole 21 is located on the bottom surface of the housing recess 20 . The through hole 21 allows communication between the inside and outside of the motor housing 12 .

The bottom wall 12a has a boss 23. As shown in FIG. The boss 23 is a portion protruding from the inner surface 121 of the bottom wall 12a toward the opening side of the motor housing 12 . The boss 23 has a first boss forming portion 23a and a second boss forming portion 23b. The first boss-constituting portion 23a is a portion continuous with the inner surface 121 of the bottom wall 12a. The second boss-constituting portion 23b is a portion that protrudes from the tip surface of the first boss-constituting portion 23a. The boss 23 has a bearing accommodating portion 23c. The bearing accommodating portion 23c is a portion that is recessed from the tip surface of the second boss forming portion 23b.

In FIG. 2, the boss 23 is indicated by a chain double-dashed line. The outer peripheral surface of the first boss forming portion 23 a has a first curved surface 231 and a first flat surface 232 . The first flat surface 232 is located inside the first curved surface 231 in the radial direction of the peripheral wall 12b. The outer peripheral surface of the second boss-constituting portion 23 b has a second curved surface 233 and a second flat surface 234 . The second curved surface 233 is located inside the first curved surface 231 in the radial direction of the peripheral wall 12b. The second flat surface 234 is located inside the second curved surface 233 in the radial direction of the peripheral wall 12b. The second flat surface 234 is flush with the first flat surface 232 . The first flat surface 232 and the second flat surface 234 constitute the relief portion 23d of the boss 23. As shown in FIG.

As shown in FIG. 1, the peripheral wall 12b has an intake port 12h. One end of an external refrigerant circuit (not shown) is connected to the intake port 12h.
The discharge housing 13 is connected to the opening side of the motor housing 12 . The discharge housing 13 has a cylindrical shape with a bottom. The bottom wall of the discharge housing 13 has a discharge port 13h. The other end of the external refrigerant circuit is connected to the discharge port 13h.

The cover 14 is connected to the bottom wall 12a of the motor housing 12. As shown in FIG. The cover 14 has a cylindrical shape with a bottom. A housing space S1 is defined by the outer surface of the bottom wall 12a of the motor housing 12 and the inner surface of the cover .

<Pivot member>
The shaft support member 15 is housed within the motor housing 12 . The shaft support member 15 has a shaft insertion hole 15a.

<Rotating axis>
The rotating shaft 16 is housed within the motor housing 12 . The axis of the rotating shaft 16 extends along the axial direction of the peripheral wall 12b. One end of the rotary shaft 16 is inserted through the shaft insertion hole 15 a of the shaft support member 15 . A first radial bearing 16 a is provided between the shaft insertion hole 15 a and one end of the rotating shaft 16 . One end of the rotary shaft 16 is rotatably supported by the shaft support member 15 via a first radial bearing 16a. The other end of the rotating shaft 16 is inserted into the bearing accommodating portion 23c of the boss 23. As shown in FIG. A second radial bearing 16b is provided between the bearing accommodating portion 23c and the other end of the rotary shaft 16. As shown in FIG. The other end of the rotating shaft 16 is rotatably supported by a boss 23 via a second radial bearing 16b.

<Compressor>
Compressor 17 is housed within motor housing 12 . The compression portion 17 is arranged closer to the opening side of the motor housing 12 than the shaft support member 15 in the axial direction of the rotating shaft 16 . The compressing portion 17 compresses the refrigerant as a fluid as the rotating shaft 16 rotates.

The compression section 17 of this embodiment has a fixed scroll 17a and a movable scroll 17b. The fixed scroll 17 a is fixed inside the motor housing 12 . The movable scroll 17b is arranged to face the fixed scroll 17a. A volume-variable compression chamber S2 is defined between the fixed scroll 17a and the movable scroll 17b. A discharge chamber S3 is defined by the fixed scroll 17a and the inner surface of the discharge housing 13. As shown in FIG.

Refrigerant sucked into the motor housing 12 through the suction port 12h is compressed by changing the volume of the compression chamber S2. The compressed refrigerant is discharged to the discharge chamber S3. The refrigerant discharged into the discharge chamber S3 flows out to the external refrigerant circuit through the discharge port 13h. The refrigerant that has flowed out to the external refrigerant circuit flows back into the motor housing 12 via the intake port 12h.

<Electric motor>
An electric motor 18 is housed within the motor housing 12 . The electric motor 18 is arranged between the shaft support member 15 and the bottom wall 12 a of the motor housing 12 in the axial direction of the rotating shaft 16 . The electric motor 18 drives the compressing portion 17 by rotating the rotary shaft 16 .

The electric motor 18 is composed of a rotor 18a and a stator 18b. The rotor 18a rotates integrally with the rotating shaft 16. As shown in FIG. The rotor 18 a has a cylindrical rotor core 181 and a plurality of permanent magnets 182 . The rotor core 181 is fixed to the rotating shaft 16 . A plurality of permanent magnets 182 are embedded in rotor core 181 . Each permanent magnet 182 is provided at equal pitches in the circumferential direction of the rotor core 181 . Stator 18b surrounds rotor 18a. A detailed configuration of the stator 18b will be described later.

<Motor drive circuit>
The motor drive circuit 19 is arranged in the accommodation space S1. A motor drive circuit 19 drives the electric motor 18 .

<Airtight terminal>
The airtight terminal 30 has a U-phase conductive member 31 u, a V-phase conductive member 31 v, a W-phase conductive member 31 w, and a support plate 32 . Each of the conductive members 31u, 31v, and 31w is a cylindrical metal terminal extending linearly. Each of the conductive members 31u, 31v, 31w is inserted through the through hole 21 of the bottom wall 12a. One end of each of the conductive members 31u, 31v, and 31w is electrically connected to the motor drive circuit 19 within the housing space S1. The other end of each conductive member 31u, 31v, 31w protrudes into the motor housing 12. As shown in FIG. The support plate 32 supports the conductive members 31u, 31v, and 31w insulated from each other.

<Connector>
Connector 40 is housed within motor housing 12 . The connector 40 is arranged between the electric motor 18 and the bottom wall 12 a in the axial direction of the rotating shaft 16 .

As shown in FIG. 2, the connector 40 has a U-phase terminal 41u, a V-phase terminal 41v, a W-phase terminal 41w, and an insulating cluster block .
The cluster block 42 has a U-phase terminal accommodating chamber 43u, a V-phase terminal accommodating chamber 43v, and a W-phase terminal accommodating chamber 43w. The U-phase terminal accommodating chamber 43u, the V-phase terminal accommodating chamber 43v, and the W-phase terminal accommodating chamber 43w are each open on the outer surface of the cluster block . The U-phase terminal 41u is housed in the U-phase terminal housing chamber 43u. The V-phase terminal 41v is housed in a V-phase terminal housing chamber 43v. It is housed in the W-phase terminal housing chamber 43w. The U-phase terminal 41u, the V-phase terminal 41v, and the W-phase terminal 41w are insulated from each other while being housed in the cluster block .

The cluster block 42 has a U-phase conductive member insertion hole 44u, a V-phase conductive member insertion hole 44v, and a W-phase conductive member insertion hole 44w. The U-phase conductive member insertion hole 44u allows the U-phase terminal accommodating chamber 43u and the outside of the cluster block 42 to communicate with each other. The V-phase conductive member insertion hole 44v allows communication between the V-phase terminal accommodating chamber 43v and the outside of the cluster block 42 . The W-phase conductive member insertion hole 44w allows communication between the W-phase terminal accommodating chamber 43w and the outside of the cluster block 42 .

The other end of the U-phase conductive member 31u is inserted into the U-phase terminal accommodating chamber 43u through the U-phase conductive member insertion hole 44u. The other end of the V-phase conductive member 31v is inserted into the V-phase terminal accommodating chamber 43v through the V-phase conductive member insertion hole 44v. The other end of the W-phase conductive member 31w is inserted into the W-phase terminal accommodating chamber 43w through the W-phase conductive member insertion hole 44w. In cluster block 42, U-phase terminal 41u is connected to the other end of U-phase conductive member 31u. The V-phase terminal 41v is connected to the other end of the V-phase conductive member 31v. The W-phase terminal 41w is connected to the other end of the W-phase conductive member 31w.

<< Stator >>
The stator 18b will be described in detail.
As shown in FIG. 3, the stator 18b has a stator core 50 and coils 60. As shown in FIG.

<Stator core>
The stator core 50 has a cylindrical yoke 51 and multiple teeth 52 . The stator core 50 of this embodiment has 30 teeth 52 .

As shown in FIG. 1, the outer peripheral surface of the yoke 51 is fixed to the inner peripheral surface of the peripheral wall 12b of the motor housing 12. As shown in FIG. The stator 18 b is thereby fixed to the motor housing 12 . The axial direction of the yoke 51 coincides with the axial direction of the rotating shaft 16 . The axial direction, the radial direction, and the circumferential direction of the yoke 51 are defined as the axial direction, the radial direction, and the circumferential direction of the stator core 50, respectively.

As shown in FIG. 3 , each tooth 52 is a portion protruding radially inward from the inner peripheral surface of the yoke 51 . A plurality of teeth 52 are arranged at intervals in the circumferential direction of stator core 50 . Slots 53 are defined by two teeth 52 adjacent in the circumferential direction of stator core 50 . The slots 53 are arranged at equal pitches in the circumferential direction of the stator core 50 .

As shown in FIG. 1, the stator core 50 has a first end face 50a and a second end face 50b. The first end surface 50 a is one axial end surface of the stator core 50 . The second end surface 50b is the other end surface of the stator core 50 in the axial direction. The first end surface 50 a is located on the motor drive circuit 19 side in the axial direction of the rotating shaft 16 . The second end face 50 b is positioned on the compression portion 17 side in the axial direction of the rotating shaft 16 .

<Coil>
As shown in FIG. 3, the coil 60 has a U-phase electric wire 60u, a V-phase electric wire 60v, and a W-phase electric wire 60w. As will be described later, the U-phase electric wire 60u, the V-phase electric wire 60v, and the W-phase electric wire 60w are distributedly wound around the stator core 50, more specifically, wave-wound. Also, the U-phase electric wire 60u, the V-phase electric wire 60v, and the W-phase electric wire 60w are delta-connected to each other. Although not shown, each of the U-phase electric wire 60u, the V-phase electric wire 60v, and the W-phase electric wire 60w has a conductor made of copper and an insulating coating covering the conductor.

As shown in FIG. 1, the coil 60 has a first coil end 601 and a second coil end 602 . The first coil end 601 is located at one axial end of the stator core 50 . The second coil end 602 is located at the other axial end of the stator core 50 . The first coil end 601 is configured by a first projecting portion 612 of each coil portion 61u, 61v, 61w, which will be described later. The second coil end 602 is configured by a second projecting portion 613 of each coil portion 61u, 61v, 61w, which will be described later.

As shown in FIGS. 2 to 4, the U-phase electric wire 60u has a U-phase coil portion 61u, a first U-phase lead portion 62u, and a second U-phase lead portion 63u. The first U-phase lead portion 62u and the second U-phase lead portion 63u are a pair of leads of the U-phase electric wire 60u. The first U-phase lead portion 62u is a lead provided on one side of the U-phase wire 60u, and the second U-phase lead portion 63u is a lead provided on the other side of the U-phase wire 60u. The U-phase electric wire 60u is electrically connected to the connector 40 via a first U-phase lead portion 62u and a second U-phase lead portion 63u.

The V-phase electric wire 60v has a V-phase coil portion 61v, a first V-phase lead portion 62v, and a second V-phase lead portion 63v. The first V-phase lead portion 62v and the second V-phase lead portion 63v are a pair of leads of the V-phase electric wire 60v. The first V-phase lead portion 62v is a lead provided on one side of the V-phase electric wire 60v, and the second V-phase lead portion 63v is a lead provided on the other side of the V-phase electric wire 60v. The V-phase electric wire 60v is electrically connected to the connector 40 via a first V-phase lead portion 62v and a second V-phase lead portion 63v.

The W-phase electric wire 60w has a W-phase coil portion 61w, a first W-phase lead portion 62w, and a second W-phase lead portion 63w. The first W-phase lead portion 62w and the second W-phase lead portion 63w are a pair of leads of the W-phase electric wire 60w. The first W-phase lead portion 62w is a lead provided on one side of the W-phase wire 60w, and the second W-phase lead portion 63w is a lead provided on the other side of the W-phase wire 60w. The W-phase electric wire 60w is electrically connected to the connector 40 via a first W-phase lead portion 62w and a second W-phase lead portion 63w.

As shown in FIG. 3 , the U-phase coil portion 61u is a portion of the U-phase electric wire 60u wound around the stator core 50 . The V-phase coil portion 61v is a portion of the V-phase electric wire 60v wound around the stator core 50 . The W-phase coil portion 61w is a portion of the W-phase electric wire 60w wound around the stator core 50 .

Specifically, the coil portions 61u, 61v, and 61w are formed by winding the electric wires 60u, 60v, and 60w around the plurality of teeth 52 in the circumferential direction of the stator core 50 at multiple frequencies. In this embodiment, the coil portions 61u, 61v, and 61w are formed by winding the electric wires 60u, 60v, and 60w around the plurality of teeth 52 in the circumferential direction of the stator core 50 for five frequencies. In addition, in FIG. 3, for the sake of simplification, the five electric wires 60u, 60v, and 60w are collectively illustrated as one.

An insulating member (not shown) is interposed between each coil portion 61u, 61v, 61w and the teeth 52 . The insulating member insulates the coil portions 61u, 61v, 61w and the teeth 52 from each other.

Each of the coil portions 61u, 61v, 61w has a plurality of passing portions 611, a plurality of first protrusions 612, and a plurality of second protrusions 613. As shown in FIG.
Each passing portion 611 is a portion that passes through the slot 53 . Each passing portion 611 extends in the axial direction of stator core 50 . In each of the coil portions 61u, 61v, and 61w, the passage portions 611 are provided every two in the circumferential direction of the stator core 50 with respect to the plurality of slots 53 . In other words, in each of the coil portions 61u, 61v, and 61w, three teeth 52 are positioned between two passing portions 611 adjacent in the circumferential direction of the stator core 50. As shown in FIG.

Each first protrusion 612 is a portion that protrudes from the first end surface 50 a of the stator core 50 in the axial direction of the stator core 50 . Each second protrusion 613 is a portion that protrudes from the second end surface 50 b of the stator core 50 in the axial direction of the stator core 50 . Each first protrusion 612 and each second protrusion 613 extend in the circumferential direction of stator core 50 . In FIG. 3, the second projecting portion 613 of each of the coil portions 61u, 61v, 61w is indicated by broken lines. In FIG. 4, illustration of the second projecting portion 613 of each of the coil portions 61u, 61v, and 61w is omitted.

One end of each passing portion 611 is connected to the first projecting portion 612 , and the other end of each passing portion 611 is connected to the second projecting portion 613 . In each coil portion 61u, 61v, 61w, the first protrusions 612 and the second protrusions 613 are alternately arranged in the circumferential direction of the stator core 50. As shown in FIG.

The first projecting portion 612 of each coil portion 61u, 61v, 61w is bound by a fixing member (not shown) so as not to rise from the first end surface 50a of the stator core 50. As shown in FIG. The second projecting portion 613 of each coil portion 61u, 61v, 61w is bound by a fixing member (not shown) so as not to rise from the second end face 50b of the stator core 50. As shown in FIG.

As shown in FIG. 4, in the radial direction of the stator core 50, the electric wires 60u, 60v and 60w forming the coil portions 61u, 61v and 61w are arranged side by side. In this embodiment, the electric wires 60u, 60v, and 60w are wound around the plurality of teeth 52 from the radially outer side of the stator core 50 toward the inner side. Specifically, each of the electric wires 60u, 60v, and 60w is wound on the tooth 52 at a radially inner position of the stator core 50 from the previous winding position. Therefore, as the work of winding the electric wires 60u, 60v, and 60w around the stator core 50 progresses, the positions at which the electric wires 60u, 60v, and 60w are wound around the teeth 52 move inward in the radial direction of the stator core 50 .

The U-phase coil portion 61u, the V-phase coil portion 61v, and the W-phase coil portion 61w are shifted in the circumferential direction of the stator core 50 and arranged. Specifically, in each slot 53, a passing portion 611 of any one of the U-phase coil portion 61u, the V-phase coil portion 61v, and the W-phase coil portion 61w is positioned. The passing portion 611 of the U-phase coil portion 61u, the passing portion 611 of the V-phase coil portion 61v, and the passing portion 611 of the W-phase coil portion 61w are provided repeatedly in the circumferential direction of the stator core 50 in this order. The first projecting portion 612 of the U-phase coil portion 61u, the first projecting portion 612 of the V-phase coil portion 61v, and the first projecting portion 612 of the W-phase coil portion 61w partially overlap in the circumferential direction of the stator core 50. ing. The second projecting portion 613 of the U-phase coil portion 61u, the second projecting portion 613 of the V-phase coil portion 61v, and the second projecting portion 613 of the W-phase coil portion 61w partially overlap in the circumferential direction of the stator core 50. ing.

The U-phase coil portion 61u, the V-phase coil portion 61v, and the W-phase coil portion 61w are arranged with being shifted in the radial direction of the stator core 50 . In the present embodiment, the wires 60u, 60v, and 60w are wound around the stator core 50 in the order of the U-phase wire 60u→V-phase wire 60v→W-phase wire 60w from the outside to the inside in the radial direction of the stator core 50. done. Therefore, the U-phase coil portion 61u, the V-phase coil portion 61v, and the W-phase coil portion 61w are arranged in this order from the outside to the inside in the radial direction of the stator core 50 . 3 and 4 are schematic diagrams, the U-phase coil portion 61u, the V-phase coil portion 61v, and the W-phase coil portion 61w do not overlap in the radial direction of the stator core 50. FIG. However, actually, the U-phase coil portion 61 u, the V-phase coil portion 61 v, and the W-phase coil portion 61 w partially overlap in the radial direction of the stator core 50 .

An insulating member (not shown) is interposed between the U-phase coil portion 61u and the V-phase coil portion 61v and between the V-phase coil portion 61v and the W-phase coil portion 61w. An insulating member interposed between U-phase coil portion 61u and V-phase coil portion 61v insulates U-phase coil portion 61u and V-phase coil portion 61v. An insulating member interposed between the V-phase coil portion 61v and the W-phase coil portion 61w insulates the V-phase coil portion 61v and the W-phase coil portion 61w.

As shown in FIGS. 1 and 2, the connector 40 is arranged to face the first coil end 601 of the coil 60 . The connector 40 is positioned between the first coil end 601 and the bottom wall 12 a in the axial direction of the rotating shaft 16 . The U-phase terminal 41u, the V-phase terminal 41v, and the W-phase terminal 41w are arranged in this order from the outside to the inside in the radial direction of the stator core 50 . The opening of the U-phase terminal accommodating chamber 43u, the opening of the V-phase terminal accommodating chamber 43v, and the opening of the W-phase terminal accommodating chamber 43w of the cluster block 42 are arranged in this order from the outside to the inside in the radial direction of the stator core 50. .

As shown in FIG. 4 , the first U-phase lead portion 62 u and the second U-phase lead portion 63 u are portions of the U-phase electric wire 60 u that are pulled out from the stator core 50 without being wound around the stator core 50 . One end of the U-phase coil portion 61u is connected to the first U-phase lead portion 62u, and the other end of the U-phase coil portion 61u is connected to the second U-phase lead portion 63u.

The first V-phase lead portion 62 v and the second V-phase lead portion 63 v are portions of the V-phase electric wire 60 v that are pulled out from the stator core 50 without being wound around the stator core 50 . One end of the V-phase coil portion 61v is connected to the first V-phase lead portion 62v, and the other end of the V-phase coil portion 61v is connected to the second V-phase lead portion 63v.

The first W-phase lead portion 62 w and the second W-phase lead portion 63 w are portions of the W-phase electric wire 60 w that are pulled out from the stator core 50 without being wound around the stator core 50 . One end of the W-phase coil portion 61w is connected to the first W-phase lead portion 62w, and the other end of the W-phase coil portion 61w is connected to the second W-phase lead portion 63w.

Each of the lead portions 62u, 62v, 62w, 63u, 63v, 63w is pulled out from the first end surface 50a of the stator core 50. As shown in FIG. Each lead portion 62u, 62v, 62w, 63u, 63v, 63w is located between the first end surface 50a of the stator core 50 and the bottom wall 12a in the axial direction of the rotating shaft 16. As shown in FIG.

As shown in FIG. 2, in the circumferential direction of the stator core 50, the positions at which the lead portions 62u, 62v, 62w, 63u, 63v, and 63w are pulled out are different from the positions at which the cluster blocks 42 are arranged. In this embodiment, the lead portions 62u, 62v, 62w, 63u, 63v, and 63w are drawn out on the opposite side of the cluster block 42 across the axis of the stator core 50 .

As described above, in the radial direction of the stator core 50, the electric wires 60u, 60v, 60w forming the coil portions 61u, 61v, 61w are arranged each time they circle the stator core 50 from the winding start to the winding end. Therefore, the position at which the first U-phase lead portion 62u is drawn in the radial direction of the stator core 50 and the position at which the second U-phase lead portion 63u is drawn in the radial direction of the stator core 50 are different. The position at which the first V-phase lead portion 62v is drawn in the radial direction of the stator core 50 and the position at which the second V-phase lead portion 63v is drawn in the radial direction of the stator core 50 are different. The position at which the first W-phase lead portion 62w is drawn in the radial direction of the stator core 50 and the position at which the second W-phase lead portion 63w is drawn in the radial direction of the stator core 50 are different.

As shown in FIG. 4, the first U-phase lead portion 62u is drawn out from the stator core 50 radially inside the stator core 50 from the drawing position of the second U-phase lead portion 63u. The first V-phase lead portion 62v is drawn out from the stator core 50 radially inside the stator core 50 from the drawing position of the second V-phase lead portion 63v. The first W-phase lead portion 62w is drawn out from the stator core 50 radially inside the stator core 50 from the drawing position of the second W-phase lead portion 63w.

In this embodiment, the electric wires 60u, 60v, and 60w are wound around the stator core 50 in the radial direction of the stator core 50 from the outside to the inside. Therefore, the lead position of the second U-phase lead portion 63u can be said to be the winding start position of the U-phase coil portion 61u. The lead position of the first U-phase lead portion 62u can also be said to be the winding end position of the U-phase coil portion 61u. The lead position of the second V-phase lead portion 63v can also be said to be the winding start position of the V-phase coil portion 61v. The lead position of the first V-phase lead portion 62v can be said to be the winding end position of the V-phase coil portion 61v. The lead position of the second W-phase lead portion 63w can also be said to be the winding start position of the W-phase coil portion 61w. The lead position of the first W-phase lead portion 62w can also be said to be the winding end position of the W-phase coil portion 61w.

As described above, the U-phase coil portion 61u, the V-phase coil portion 61v, and the W-phase coil portion 61w are arranged with being shifted in the radial direction of the stator core 50 . The first U-phase lead portion 62u, the first V-phase lead portion 62v, and the first W-phase lead portion 62w are drawn out from the stator core 50 in this order from the outside to the inside in the radial direction of the stator core 50 . The second U-phase lead portion 63u, the second V-phase lead portion 63v, and the second W-phase lead portion 63w are drawn out from the stator core 50 in this order from the outside to the inside in the radial direction of the stator core 50 . In this embodiment, the drawing positions of the lead portions 62u, 62v, 62w, 63u, 63v, and 63w in the radial direction of the stator core 50 are the second U-phase lead portion 63u and the second V-phase lead portion 63v from the outside toward the inside. , the first U-phase lead portion 62u, the second W-phase lead portion 63w, the first V-phase lead portion 62v, and the first W-phase lead portion 62w.

As shown in FIG. 2, the lead portions 62u, 62v, 62w, 63u, 63v, and 63w are wired from the drawn-out position toward the connector 40. As shown in FIG. Specifically, the lead portions 62u, 62v, 62w, 63u, 63v, and 63w are wired so as to extend in the circumferential direction of the stator core 50 . Note that "wired to extend in the circumferential direction of stator core 50" includes a state in which stator core 50 extends in the circumferential direction while moving in the radial direction of stator core 50. FIG. Each lead portion 62u, 62v, 62w, 63u, 63v, 63w is arranged so as to face the connector 40 clockwise when viewed from the first end surface 50a side of the stator core 50 . The lead portions 62u, 62v, 62w, 63u, 63v, and 63w are wired along the first coil end 601 .

In the circumferential direction of the stator core 50, a wiring region A is defined as a region in which the lead portions 62u, 62v, 62w, 63u, 63v, and 63w are wired. The wiring area A is an area extending along the circumferential direction of the stator core 50 . The wiring area A is located in a part of the stator core 50 in the circumferential direction. In the wiring area A, the lead portions 62u, 62v, 62w, 63u, 63v, and 63w are led out as follows.

In the wiring region A, the lead position of the first U-phase lead portion 62u is located between the connector 40 and the lead position of the second U-phase lead portion 63u in the circumferential direction of the stator core 50. As shown in FIG. It can be said that the second U-phase lead portion 63u is connected to the connector 40 across the drawing position of the first U-phase lead portion 62u in the circumferential direction of the stator core 50 . Note that "the second U-phase lead portion 63u straddles the drawn-out position of the first U-phase lead portion 62u in the circumferential direction of the stator core 50" means that the second U-phase lead portion 63u is located at the drawn-out position of the first U-phase lead portion 62u. does not refer to passing above in the axial direction of “The second U-phase lead portion 63u straddles the drawing position of the first U-phase lead portion 62u in the circumferential direction of the stator core 50” means that the second U-phase lead portion 63u extends beyond the first U-phase lead portion 62u in the radial direction of the stator core 50. It refers to passing through the pulled-out position of the first U-phase lead portion 62u at a position different from the pulled-out position.

In the wiring area A, the lead position of the first V-phase lead portion 62v is located between the connector 40 and the lead position of the second V-phase lead portion 63v in the circumferential direction of the stator core 50. As shown in FIG. It can be said that the second V-phase lead portion 63v is connected to the connector 40 across the drawing position of the first V-phase lead portion 62v in the circumferential direction of the stator core 50 . Note that "the second V-phase lead portion 63v straddles the drawn-out position of the first V-phase lead portion 62v in the circumferential direction of the stator core 50" means that the second V-phase lead portion 63v is located at the drawn-out position of the first V-phase lead portion 62v. does not refer to passing above in the axial direction of “The second V-phase lead portion 63v straddles the drawing position of the first V-phase lead portion 62v in the circumferential direction of the stator core 50” means that the second V-phase lead portion 63v extends beyond the first V-phase lead portion 62v in the radial direction of the stator core 50. It refers to passing through the pulled-out position of the first V-phase lead portion 62v at a position different from the pulled-out position.

In the wiring area A, the lead-out position of the first W-phase lead portion 62w is positioned between the connector 40 and the lead-out position of the second W-phase lead portion 63w in the circumferential direction of the stator core 50 . It can be said that the second W-phase lead portion 63w is connected to the connector 40 across the drawing position of the first W-phase lead portion 62w in the circumferential direction of the stator core 50 . Note that "the second W-phase lead portion 63w straddles the drawn-out position of the first W-phase lead portion 62w in the circumferential direction of the stator core 50" means that the second W-phase lead portion 63w extends to the stator core 50 at the drawn-out position of the first W-phase lead portion 62w. does not refer to passing above in the axial direction of “The second W-phase lead portion 63w straddles the drawn-out position of the first W-phase lead portion 62w in the circumferential direction of the stator core 50” means that the second W-phase lead portion 63w extends beyond the first W-phase lead portion 62w in the radial direction of the stator core 50. It refers to passing through the pulled-out position of the first W-phase lead portion 62w at a position different from the pulled-out position.

In the present embodiment, in the wiring area A, the lead-out positions of the first V-phase lead portion 62v, the first W-phase lead portion 62w, the second V-phase lead portion 63v, the first U-phase lead portion 62u, and the second W-phase lead portion 63w are They are arranged in this order in the circumferential direction of stator core 50 from connector 40 toward the position where second U-phase lead portion 63u is drawn between connector 40 and the position where second U-phase lead portion 63u is drawn.

The second U-phase lead portion 63u is drawn from a position farther from the connector 40 in the circumferential direction of the stator core 50 than the drawing positions of the second V-phase lead portion 63v and the second W-phase lead portion 63w. In the circumferential direction of the stator core 50, the first V-phase lead portion 62v is located at a position closer to the connector than the drawing positions of the first U-phase lead portion 62u, the second U-phase lead portion 63u, the first W-phase lead portion 62w, and the second W-phase lead portion 63w. It is pulled out at a position close to 40. The second V-phase lead portion 63v and the first U-phase lead portion 62u are pulled out in the circumferential direction of the stator core 50 between the position where the first W-phase lead portion 62w is pulled out and the position where the second W-phase lead portion 63w is pulled out.

The second U-phase lead portion 63u is connected to the connector 40 via a radially inner side of the position where the second W-phase lead portion 63w is pulled out of the stator core 50 . The second V-phase lead portion 63v and the first U-phase lead portion 62u are connected to the connector 40 via the outer side of the drawing position of the first V-phase lead portion 62v in the radial direction of the stator core 50 . The second W-phase lead portion 63w is connected to the connector 40 via a position outside the lead position of the first W-phase lead portion 62w and inside the lead position of the second V-phase lead portion 63v in the radial direction of the stator core 50. there is

The first U-phase lead portion 62u and the second V-phase lead portion 63v are inserted through an insulating U-phase tube 71 . A portion of the first U-phase lead portion 62 u and the second V-phase lead portion 63 v are covered with a U-phase tube 71 . The U-phase tube 71 extends along the circumferential direction of the stator core 50 together with the first U-phase lead portion 62u and the second V-phase lead portion 63v. The first U-phase lead portion 62u and the second V-phase lead portion 63v are inserted into the U-phase terminal accommodating chamber 43u through the opening of the U-phase terminal accommodating chamber 43u in a state where the U-phase tube 71 is inserted. The U-phase tube 71 is connected to the connector 40 together with the first U-phase lead portion 62u and the second V-phase lead portion 63v.

The tip portions of the first U-phase lead portion 62 u and the second V-phase lead portion 63 v are not covered with the U-phase tube 71 . Insulating coatings are removed from the distal end portions of the first U-phase lead portion 62u and the second V-phase lead portion 63v, thereby exposing the conductive wires. Each tip of the first U-phase lead portion 62u and the second V-phase lead portion 63v is connected to the U-phase terminal 41u. That is, the first U-phase lead portion 62u and the second V-phase lead portion 63v pass through the U-phase tube 71 and are connected to the U-phase terminal 41u. The U-phase terminal 41u electrically connects the first U-phase lead portion 62u and the second V-phase lead portion 63v. The U-phase terminal 41u electrically connects the first U-phase lead portion 62u and the second V-phase lead portion 63v to the U-phase conductive member 31u.

The second W-phase lead portion 63w and the first V-phase lead portion 62v are inserted through an insulating V-phase tube 72 . A portion of the second W-phase lead portion 63 w and the first V-phase lead portion 62 v are covered with the V-phase tube 72 . The V-phase tube 72 extends along the circumferential direction of the stator core 50 together with the second W-phase lead portion 63w and the first V-phase lead portion 62v. The second W-phase lead portion 63w and the first V-phase lead portion 62v are inserted into the V-phase terminal accommodating chamber 43v through the opening of the V-phase terminal accommodating chamber 43v in a state where the V-phase tube 72 is inserted. The V-phase tube 72 is connected to the connector 40 together with the second W-phase lead portion 63w and the first V-phase lead portion 62v.

The tip end portions of the second W-phase lead portion 63w and the first V-phase lead portion 62v are not covered with the V-phase tube 72 . Insulating coatings are removed from the distal end portions of the second W-phase lead portion 63w and the first V-phase lead portion 62v to expose the conductive wires. Each tip of the second W-phase lead portion 63w and the first V-phase lead portion 62v is connected to the V-phase terminal 41v. That is, the second W-phase lead portion 63w and the first V-phase lead portion 62v pass through the V-phase tube 72 and are connected to the V-phase terminal 41v. The V-phase terminal 41v electrically connects the second W-phase lead portion 63w and the first V-phase lead portion 62v. The V-phase terminal 41v electrically connects the second W-phase lead portion 63w and the first V-phase lead portion 62v to the V-phase conductive member 31v.

The second U-phase lead portion 63 u and the first W-phase lead portion 62 w are inserted through an insulating W-phase tube 73 . A portion of the second U-phase lead portion 63 u and the first W-phase lead portion 62 w are covered with a W-phase tube 73 . The W-phase tube 73 extends along the circumferential direction of the stator core 50 together with the second U-phase lead portion 63u and the first W-phase lead portion 62w. The second U-phase lead portion 63u and the first W-phase lead portion 62w are inserted into the W-phase terminal accommodating chamber 43w through an opening of the W-phase terminal accommodating chamber 43w while being inserted into the W-phase tube 73. As shown in FIG. The W-phase tube 73 is connected to the connector 40 together with the second U-phase lead portion 63u and the first W-phase lead portion 62w.

The distal ends of the second U-phase lead portion 63 u and the first W-phase lead portion 62 w are not covered with the W-phase tube 73 . Insulating coatings are removed from the distal ends of the second U-phase lead portion 63u and the first W-phase lead portion 62w, thereby exposing the conductive wires. Each tip of the second U-phase lead portion 63u and the first W-phase lead portion 62w is connected to the W-phase terminal 41w. That is, the second U-phase lead portion 63u and the first W-phase lead portion 62w pass through the W-phase tube 73 and are connected to the W-phase terminal 41w. The W-phase terminal 41w electrically connects the second U-phase lead portion 63u and the first W-phase lead portion 62w. The W-phase terminal 41w electrically connects the second U-phase lead portion 63u, the first W-phase lead portion 62w, and the W-phase conductive member 31w.

Thus, the U-phase electric wire 60u, the V-phase electric wire 60v, and the W-phase electric wire 60w are delta-connected through the U-phase terminal 41u, the V-phase terminal 41v, and the W-phase terminal 41w. A first U-phase lead portion 62u and a second V-phase lead portion 63v connected to the U-phase terminal 41u, a second W-phase lead portion 63w and a first V-phase lead portion 62v connected to the V-phase terminal 41v, and a W-phase terminal 41w. The second U-phase lead portion 63u and the first W-phase lead portion 62w connected to the stator core 50 are arranged in this order from the outside to the inside in the radial direction of the stator core 50 . Therefore, the U-phase tube 71 , the V-phase tube 72 , and the W-phase tube 73 are also arranged in this order from the outside to the inside in the radial direction of the stator core 50 .

Each lead portion 62u, 62v, 62w, 63u, 63v, 63w and each tube 71, 72, 73 are bound to the first coil end 601 by a fixing member S so as not to be lifted from the first coil end 601. FIG. The fixing member S is, for example, thread. In this embodiment, the fixing member S is provided in a range in the circumferential direction of the stator core 50 from the position where the second U-phase lead portion 63u is pulled out to the position where the tubes 71, 72, and 73 are aligned in the radial direction of the stator core 50. there is

As shown in FIG. 2 , each of the tubes 71 , 72 , 73 and the cluster block 42 has a portion located outside the tip end surface 52 a of the tooth 52 and a portion outside the tip end surface 52 a of the tooth 52 in the radial direction of the stator core 50 . and a portion located inside.

As shown in FIG. 1 , a portion of the cluster block 42 in the axial direction of the rotating shaft 16 is accommodated in the accommodation recess 20 . Portions of the tubes 71 , 72 , 73 and the cluster block 42 that are not accommodated in the accommodation recesses 20 overlap the bosses 23 in the axial direction of the rotating shaft 16 .

Therefore, if the boss 23 is not provided with the relief portion 23 d , the portions of the tubes 71 , 72 , 73 and the cluster blocks 42 located radially inward of the tip end surfaces 52 a of the teeth 52 interfere with the boss 23 . do. However, in this embodiment, since the boss 23 is provided with the relief portion 23d, the portions of the tubes 71, 72, 73 and the cluster block 42 located radially inward of the tip end surfaces 52a of the teeth 52 are Interference with the boss 23 is avoided.

Actions and effects of the embodiment will be described.
(1) The first U-phase lead portion 62u, the first V-phase lead portion 62v, and the first W-phase lead portion 62w are arranged in this order from the outside to the inside in the radial direction of the stator core 50 . The second U-phase lead portion 63u, the second V-phase lead portion 63v, and the second W-phase lead portion 63w are arranged in this order from the outside to the inside in the radial direction of the stator core 50 . At this time, for example, the second U-phase lead portion 63u may be pulled out from a position closer to the connector 40 in the circumferential direction of the stator core 50 than the positions at which the second V-phase lead portion 63v and the second W-phase lead portion 63 are pulled out. . In this case, when electrically connecting the second U-phase lead portion 63u and the first W-phase lead portion 62w, the second U-phase lead portion 63u crosses, for example, the second W-phase lead portion 63w.

On the other hand, in the present embodiment, the second U-phase lead portion 63u is pulled out from a position farther from the connector 40 in the circumferential direction of the stator core 50 than the pull-out positions of the second V-phase lead portion 63v and the second W-phase lead portion 63w. is In addition, the second U-phase lead portion 63u is electrically connected to the first W-phase lead portion 62w via a position inside the drawing position of the second W-phase lead portion 63w in the radial direction of the stator core 50 . Therefore, when electrically connecting the second U-phase lead portion 63u and the first W-phase lead portion 62w, the second U-phase lead portion 63u is prevented from crossing the second W-phase lead portion 63w. That is, when the U-phase electric wire 60u, the V-phase electric wire 60v, and the W-phase electric wire 60w are delta-connected, the lead portions 62u, 62v, 62w, 63u, 63v, and 63w are prevented from crossing each other. Therefore, it is possible to prevent the electric motor 18 from increasing in size in the axial direction of the stator core 50 . By avoiding an increase in size of the electric motor 18 in the axial direction, an increase in size of the electric compressor 10 as a whole can be suppressed.

(2) Since the lead portions 62u, 62v, 62w, 63u, 63v, and 63w are prevented from intersecting, when the electric motor 18 is accommodated in the motor housing 12, the portion where the leads intersect is the bottom wall 12a. It is possible to avoid problems such as deterioration of insulation due to interference with

(3) The first V-phase lead portion 62v is arranged in the circumferential direction of the stator core 50 from the drawn-out positions of the first U-phase lead portion 62u, the second U-phase lead portion 63u, the first W-phase lead portion 62w, and the second W-phase lead portion 63w. are also pulled out at a position close to the connector 40 . In addition, the second V-phase lead portion 63v and the first U-phase lead portion 62u are pulled out between the position where the first W-phase lead portion 62w is pulled out and the position where the second W-phase lead portion 63w is pulled out in the circumferential direction of the stator core 50. there is Therefore, the second V-phase lead portion 63v and the first U-phase lead portion 62u are pulled out in the circumferential direction of the stator core 50 between the position where the first W-phase lead portion 62w is pulled out and the position where the second W-phase lead portion 63w is pulled out. Compared to the case where the wires 60u, 60v, and 60w are not connected, the difference in length between the wires 60u, 60v, and 60w can be reduced. Therefore, it is possible to reduce the difference in electrical resistance among the electric wires 60u, 60v, and 60w.

(4) The first U-phase lead portion 62u and the second V-phase lead portion 63v pass through the U-phase tube 71 and are connected to the U-phase terminal 41u. The second W-phase lead portion 63w and the first V-phase lead portion 62v pass through the V-phase tube 72 and are connected to the V-phase terminal 41v. The second U-phase lead portion 63u and the first W-phase lead portion 62w pass through the W-phase tube 73 and are connected to the W-phase terminal 41w.

By electrically connecting the two lead portions through the terminals in this manner, the connection work becomes easier than when the two lead portions are directly connected without the terminals. . Moreover, since the two lead portions are inserted through the tube, they are less likely to come loose compared to the case where the lead portions are not inserted through the tube. Therefore, it becomes easier to handle the lead portion. In addition, by arranging the tubes in the radial direction of the stator core 50, it is possible to prevent the leads from the drawn-out position to the connector 40 from crossing each other.

(5) The first U-phase lead portion 62u is drawn from the inner side in the radial direction of the stator core 50 from the drawing position of the second U-phase lead portion 63u. The first V-phase lead portion 62v is drawn from the inner side in the radial direction of the stator core 50 from the drawing position of the second V-phase lead portion 63v. The first W-phase lead portion 62w is drawn from the inner side in the radial direction of the stator core 50 from the drawing position of the second W-phase lead portion 63w. In this case, the wiring work of the lead portions 62u, 62v, 62w, 63u, 63v, 63w is facilitated.

(6) The second W-phase lead portion 63w is drawn out from the radially outer side of the stator core 50 from the drawing position of the first W-phase lead portion 62w. For this reason, compared to the case where the second W-phase lead portion 63w is pulled out from the inner side in the radial direction of the pull-out position of the first W-phase lead portion 62w, the second W-phase lead portion 63w is located inside the pull-out position of the second W-phase lead portion 63w. A wide space for the 2U-phase lead portion 63u to pass can be secured. Therefore, the second U-phase lead portion 63u is less likely to protrude inward from the tip end surface 52a of the tooth 52 .

(7) In order to allow the lead portions to intersect and prevent the intersecting portion from interfering with the bottom wall 12a, for example, recesses are provided at positions corresponding to the intersecting portions on the inner surface 121 of the bottom wall 12a. can be considered to form However, forming the recessed portion reduces the rigidity of the motor housing 12 and makes it difficult to manufacture the motor housing 12 . In contrast, by wiring the lead portions 62u, 62v, 62w, 63u, 63v, and 63w as in the present embodiment, no crossing portion occurs, thereby eliminating the need to change the shape of the motor housing 12. become. Therefore, the wires 60u, 60v, and 60w can be prevented from interfering with the bottom wall 12a without lowering the rigidity of the motor housing 12 or impairing the ease of manufacturing the motor housing 12. FIG.

The bottom wall 12a of the motor housing 12 is formed with a housing recess 20 in which the cluster block 42 is housed. Just to make sure, the reason why the housing recess 20 does not significantly reduce the rigidity of the motor housing 12 will be explained. A through hole 21 is formed in the bottom wall 12a to allow communication between the inside of the motor housing 12 and the housing space S1. Therefore, high rigidity is not required around the through hole 21 in the bottom wall 12a. The accommodation recess 20 is formed so that the through hole 21 is positioned on the bottom surface of the accommodation recess 20 . That is, the accommodation recess 20 is formed in a portion of the bottom wall 12a that does not require high rigidity. Therefore, the accommodation recess 20 does not significantly reduce the rigidity of the motor housing 12 .

This embodiment can be implemented with the following modifications. This embodiment and modifications can be implemented in combination with each other within a technically consistent range.
O The first V-phase lead portion 62v does not have to be pulled out at a position closer to the connector 40 in the circumferential direction of the stator core 50 than the pulled-out positions of the first U-phase lead portion 62u and the first W-phase lead portion 62w. For example, the first V-phase lead portion 62v may be pulled out in the circumferential direction of the stator core 50 between the position where the first U-phase lead portion 62u is pulled out and the position where the first W-phase lead portion 62w is pulled out. For example, the first V-phase lead portion 62v may be drawn out in the circumferential direction of the stator core 50 at a position farther from the connector 40 than the drawing positions of the first U-phase lead portion 62u and the first W-phase lead portion 62w.

○ The second V-phase lead portion 63v and the first U-phase lead portion 62u are not pulled out between the position where the first W-phase lead portion 62w is pulled out and the position where the second W-phase lead portion 63w is pulled out in the circumferential direction of the stator core 50. may For example, the second V-phase lead portion 63v may be pulled out in the circumferential direction of the stator core 50 between the position where the first V-phase lead portion 62v is pulled out and the position where the first W-phase lead portion 62w is pulled out. For example, the first U-phase lead portion 62u may be pulled out in the circumferential direction of the stator core 50 between the position where the second U-phase lead portion 63u is pulled out and the position where the second W-phase lead portion 63w is pulled out.

(circle) the 1st U-phase lead part 62u may be pulled out from the outer side in the radial direction of the stator core 50 rather than the lead-out position of the 2nd U-phase lead part 63u. The first V-phase lead portion 62v may be pulled out from the outside in the radial direction of the stator core 50 from the position where the second V-phase lead portion 63v is pulled out. The first W-phase lead portion 62w may be pulled out from the outside in the radial direction of the stator core 50 from the position where the second W-phase lead portion 63w is pulled out.

O The work of winding the electric wires 60u, 60v, and 60w around the stator core 50 may be performed from the inner side to the outer side of the stator core 50 in the radial direction. In this case, the lead position of the first U-phase lead portion 62u is the winding start position of the U-phase coil portion 61u. The lead-out position of the second U-phase lead portion 63u is the winding end position of the U-phase coil portion 61u. The lead-out position of the first V-phase lead portion 62v is the winding start position of the V-phase coil portion 61v. The lead-out position of the second V-phase lead portion 63v is the winding end position of the V-phase coil portion 61v. The lead-out position of the first W-phase lead portion 62w is the winding start position of the W-phase coil portion 61w. The lead-out position of the second W-phase lead portion 63w is the winding end position of the W-phase coil portion 61w.

The electric wires 60u, 60v, and 60w forming the coil portions 61u, 61v, and 61w may not be wound around the plurality of teeth 52, but may be pre-wound before being inserted into the plurality of teeth 52.

(circle) each electric wire 60u, 60v, 60w should just be a distributed winding, and is not limited to wave winding. Each electric wire 60u, 60v, 60w may be concentrically wound or lap wound, for example.
O The first U-phase lead portion 62u and the second V-phase lead portion 63v may be electrically connected by being directly connected without passing through the U-phase terminal 41u. The second W-phase lead portion 63w and the first V-phase lead portion 62v may be electrically connected by being directly connected without passing through the V-phase terminal 41v. The first W-phase lead portion 62w and the second U-phase lead portion 63u may be electrically connected by being directly connected without passing through the W-phase terminal 41w.

(circle) fixing member S may be abbreviate|omitted.
(circle) the fixing member S does not need to be a thread as long as it is a non-conductive member.
(circle) the compression part 17 is not restricted to a scroll type, For example, a piston type, a vane type, etc. may be used.

DESCRIPTION OF SYMBOLS 10... Electric compressor 17... Compression part 18... Electric motor 18b... Stator 19... Motor drive circuit 40... Connector 41u... U-phase terminal 41v... V-phase terminal 41w... W-phase terminal 50... Stator core 60 Coil 60u U-phase electric wire 60v V-phase electric wire 60w W-phase electric wire 62u First U-phase lead as lead on one side 62v First V-phase lead as lead on one side 62w . 71... U-phase tube, 72... V-phase tube, 73... W-phase tube, 601... First coil end as coil end.

Claims (4)

a compression section for compressing a fluid;
an electric motor having a cylindrical stator core and coils in which a U-phase wire, a V-phase wire, and a W-phase wire are delta-connected by distributed winding, and which drives the compression unit;
a motor drive circuit for driving the electric motor;
a connector that electrically connects the electric motor and the motor drive circuit;
with
The connector is provided so as to face a coil end of the coil located at one axial end of the stator core,
The U-phase electric wire, the V-phase electric wire, and the W-phase electric wire each include a pair of leads on one side and the other side, and are electrically connected to the connector via the pair of leads,
The leads on one side of the U-phase electric wire, the V-phase electric wire, and the W-phase electric wire are arranged in the order of U-phase, V-phase, and W-phase from the outer side to the inner side in the radial direction of the stator core. drawn from
The leads on the other side of the U-phase electric wire, the V-phase electric wire, and the W-phase electric wire are pulled out from the stator core in the order of U-phase, V-phase, and W-phase from the outer side to the inner side in the radial direction. connected to the connector across the lead-out positions of the one-side leads of the same phase in the circumferential direction of the stator core,
The lead on the other side of the U-phase electric wire is pulled out from a position farther from the connector than the lead positions on the other side of the V-phase electric wire and the W-phase electric wire in the circumferential direction, and The electric compressor is electrically connected to the lead on the one side of the W-phase electric wire via a radially inner side than the lead position of the lead on the other side of the W-phase electric wire. . The one-side lead of the V-phase electric wire is pulled out at a position closer to the connector in the circumferential direction than the one-side and the other-side leads of the U-phase electric wire and the W-phase electric wire. and
The one-side lead of the U-phase electric wire and the other-side lead of the V-phase electric wire are drawn out between the drawing positions of the one-side and the other-side leads of the W-phase electric wire in the circumferential direction. The electric compressor according to claim 1, wherein The connector has a U-phase terminal, a V-phase terminal, and a W-phase terminal,
The U-phase terminal, the V-phase terminal, and the W-phase terminal are arranged in order of U-phase, V-phase, and W-phase from the outer side to the inner side in the radial direction,
an insulating U-phase tube, a V-phase tube, and a W-phase tube are connected to the connector while extending along the circumferential direction;
In the radial direction, the U-phase tube, the V-phase tube, and the W-phase tube are arranged in order of U-phase, V-phase, and W-phase from the outer side to the inner side in the radial direction,
the one-side lead of the U-phase wire and the other-side lead of the V-phase wire are connected to the U-phase terminal while passing through the U-phase tube,
the one-side lead of the V-phase wire and the other-side lead of the W-phase wire are connected to the V-phase terminal while passing through the V-phase tube,
3. The electric motor according to claim 1, wherein the lead on the one side of the W-phase wire and the lead on the other side of the U-phase wire are connected to the W-phase terminal while passing through the W-phase tube. compressor. the lead on the one side of the U-phase electric wire is pulled out from the stator core inside the lead on the other side of the U-phase electric wire in the radial direction;
the lead on the one side of the V-phase electric wire is pulled out from the stator core inside the lead on the other side of the V-phase electric wire in the radial direction;
The lead on the one side of the W-phase wire is pulled out from the stator core inside the lead on the other side in the radial direction of the lead of the W-phase wire. The electric compressor described in .

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