JP2013158078A - Stator of rotary electric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stator of a rotary electric machine which improves the flexibility of at least one of the layout, the design, and the assembly of a temperature element.SOLUTION: Multiple insulation members 34 of a stator 20 are arranged in a circumferential direction of the stator 20. Each of the insulation members 34 includes: a trunk part 50 around which a distribution line 38 is wound; and an extension part 52 extending in an axial direction of the stator 20 from an end part of the trunk part 50 in a radial direction of the stator 20. The extension part 52 has a recessed part 72 which is continuous in the circumferential direction of the stator 20 and is recessed in the axial direction of the stator 20. An injection space 74, in which a filler 100 is injected, is formed by connecting the recessed parts 72 of the adjacent insulation members 34. A temperature element 40 is disposed in the injection space 74 and is fixed by the filler 100 injected in the injection space 74.

Description

  The present invention relates to a stator of a rotating electrical machine, and more particularly to a stator including a temperature measuring element that detects the temperature of at least one of a plurality of coils.

  The structure provided with the temperature sensor (temperature measuring element) used for the coil in a motor is proposed (patent document 1). In Patent Document 1, an object is to provide an electric motor including a heat responsive switch that can easily and stably fix the heat responsive switch closely to the winding without damaging the stator winding (summary, [0005]. ]).

  In order to achieve this object, in Patent Document 1 (summary), the electric motor 10 monitors the temperatures of the front housing 12, the rear housing 14, the stator 16, the rotor 18, and the winding 26 of the stator 16. And a thermally responsive switch 34. The thermally responsive switch 34 is closely fixed to the outer surface of the coil end portion 36 of the winding 26 protruding from the axial end surface of the stator 16 by fixing means. Thereby, it is said that the thermally responsive switch 34 can be easily and stably attached to a predetermined position without damaging the winding 26 (summary). The thermally responsive switch 34 is composed of, for example, a temperature responsive element such as a bimetal, a thermistor, and operates when the temperature of the winding 26 reaches a predetermined starting temperature of the thermally responsive switch 34 when the electric motor 10 is operated. Then, an electric signal for stopping the electric motor 10 is output (summary).

  In FIG. 2 of Patent Document 1, the thermally responsive switch 34 is held by a holding member 40 disposed between the rear housing 14 and the coil end portion 36. Further, in FIG. 3 of Patent Document 1, the thermally responsive switch 34 is held by a holding member 40 disposed between the rear housing 14 and the coil end portion 36 and connected with a resin material, as in FIG. It is fixed by the member 42 ([0014]).

  Furthermore, paragraph [0017] of Patent Document 1 describes that an adhesive that directly fixes the thermal responsive switch to the coil end of the winding, the rear housing, or both can be used as a means for fixing the thermal responsive switch. There is.

Japanese Patent Laid-Open No. 08-019222

  In Patent Document 1, when the holding member 40 is used, the holding member 40 increases the number of parts. Further, when only the connecting member 42 made of a resin material or an adhesive is used, the thermal response switch 34 must be fixed to the rear housing 14 or the coil end 36, and the accuracy or configuration of the thermal response switch 34 is taken into consideration. The arrangement of the heat responsive switch 34 and the configuration of the rear housing 14 are restricted.

  The present invention has been made in consideration of such problems, and an object of the present invention is to provide a stator for a rotating electrical machine capable of improving at least one degree of freedom in arrangement, design and assembly relating to a temperature measuring element. And

  A stator of a rotating electrical machine according to the present invention includes an annular stator core, teeth formed to protrude from the stator core, a plurality of insulating members attached to the teeth, and wiring wound around each of the plurality of insulating members. And a temperature measuring element that detects the temperature of at least one of the plurality of coils, wherein the plurality of insulating members are arranged in a circumferential direction of the stator. Each of the plurality of insulating members includes a body portion around which the wiring is wound, and an extending portion that extends in the radial direction of the stator from an end portion of the body portion in the radial direction of the stator. The extending portion is continuous in the circumferential direction of the stator and is recessed in the axial direction of the stator with respect to an end surface of the extending portion in the axial direction of the stator. An injecting space for injecting a filler is formed by connecting the recesses of the insulating member adjacent to each other in the circumferential direction of the stator, and the temperature measuring element is disposed in the injecting space. And fixed with the filler injected into the injection space.

  According to this invention, the temperature measuring element is fixed in the injection space formed by connecting the concave portions of the extending portion of the insulating member. Since the extending portion extends from the body portion around which the wiring configuring the coil is wound, the temperature measuring element can be positioned in the vicinity of the coil. Further, the extending portion is provided on the same insulating member as the trunk portion around which the wiring configuring the coil is wound. For this reason, for example, even when the temperature measuring element is not directly fixed to the coil or the housing and it is not desired to increase the number of parts, the temperature measuring element can be provided. Accordingly, it is possible to increase the degree of freedom of arrangement or design related to the temperature measuring element.

  Further, the recess for fixing the temperature measuring element is recessed in the axial direction of the stator. For this reason, when fixing a temperature measuring element, a temperature measuring element will be entered into the said recessed part from the axial direction of a stator. For this reason, even if it is a structure where it is difficult to make a temperature measuring element approach from the radial direction or the circumferential direction of a stator, it becomes possible to arrange | position and fix a temperature measuring element. Therefore, it is possible to improve the degree of freedom in assembling the temperature measuring element.

  Furthermore, according to the present invention, the filler is injected into the injection space where the temperature measuring element is arranged. For this reason, it becomes possible to fix a temperature measuring element in the state arrange | positioned in the vicinity of a coil. Accordingly, it is possible to prevent the temperature sensing element from being displaced due to vibrations during operation of the rotating electrical machine or the like, or coming off from the mounting position over a long period of time.

  The extending part may be formed with an opening penetrating from the concave part toward the coil, and the temperature measuring part of the temperature measuring element may be opposed to the coil through the opening. Thereby, since an insulating member does not intervene between a temperature measuring part and a coil, the temperature measuring part can measure the temperature of a coil more correctly.

  By inserting at least a part of the temperature measuring element into the opening, the temperature measuring element may be locked to the extending portion to constitute a locking portion. This makes it possible to more effectively suppress the displacement of the temperature measuring element.

  The temperature measuring element is disposed along an inner wall of the recess, and a flange portion is formed on a surface of the temperature measuring element on a radially inner side of the stator, and the flange portion is locked to the extension portion. May be.

  A groove extending along the axial direction of the stator may be formed in one of the temperature measuring element or the extending portion, and the other may be fitted into the groove.

  A power distribution member for supplying current to the coil may be disposed in the injection space, and the filler may be an insulating material. Thereby, for example, using a filler, it is possible to insulate the connection portion between the wiring constituting the coil and the power distribution member from the surroundings, and to fix the temperature measuring element. Therefore, it is possible to prevent an increase in the number of processes at the time of manufacture and suppress a decrease in production efficiency.

  A stator of a rotating electrical machine according to the present invention includes an annular stator core, teeth formed to protrude from the stator core, a plurality of insulating members attached to the teeth, and wiring wound around each of the plurality of insulating members. And a temperature measuring element that detects the temperature of at least one of the plurality of coils, wherein the plurality of insulating members are arranged in a circumferential direction of the stator. Each of the plurality of insulating members includes a body portion around which the wiring is wound, and an extending portion that extends in the radial direction of the stator from an end portion of the body portion in the radial direction of the stator. The extending portion is continuous in the circumferential direction of the stator and is recessed in the axial direction of the stator with respect to an end surface of the extending portion in the axial direction of the stator. Has a section, the formed annular recess by the recess of the insulating member adjacent to each other in the circumferential direction of the stator is contiguous, the temperature measuring device is characterized in that it is secured within the annular recess.

  According to this invention, the temperature measuring element is fixed in a continuous recess formed by connecting the recesses of the extending portion of the insulating member. Since the extending portion extends from the body portion around which the wiring configuring the coil is wound, the temperature measuring element can be positioned in the vicinity of the coil. Further, the extending portion is provided on the same insulating member as the trunk portion around which the wiring configuring the coil is wound. For this reason, for example, even when the temperature measuring element is not directly fixed to the coil or the housing and it is not desired to increase the number of parts, the temperature measuring element can be provided. Accordingly, it is possible to increase the degree of freedom of arrangement or design related to the temperature measuring element.

  Further, the recess for fixing the temperature measuring element is recessed in the axial direction of the stator. For this reason, when fixing a temperature measuring element, a temperature measuring element will be entered into the said recessed part from the axial direction of a stator. For this reason, even if it is a structure where it is difficult to make a temperature measuring element approach from the radial direction or the circumferential direction of a stator, it becomes possible to arrange | position and fix a temperature measuring element. Therefore, it is possible to improve the degree of freedom in assembling the temperature measuring element.

  According to this invention, the temperature measuring element is fixed in the injection space formed by connecting the concave portions of the extending portion of the insulating member. Since the extending portion extends from the body portion around which the wiring configuring the coil is wound, the temperature measuring element can be positioned in the vicinity of the coil. Further, the extending portion is provided on the same insulating member as the trunk portion around which the wiring configuring the coil is wound. For this reason, for example, even when the temperature measuring element is not directly fixed to the coil or the housing and it is not desired to increase the number of parts, the temperature measuring element can be provided. Accordingly, it is possible to increase the degree of freedom of arrangement or design related to the temperature measuring element.

  Further, the recess for fixing the temperature measuring element is recessed in the axial direction of the stator. For this reason, when fixing a temperature measuring element, a temperature measuring element will be entered into the said recessed part from the axial direction of a stator. For this reason, even if it is a structure where it is difficult to make a temperature measuring element approach from the radial direction or the circumferential direction of a stator, it becomes possible to arrange | position and fix a temperature measuring element. Therefore, it is possible to improve the degree of freedom in assembling the temperature measuring element.

  Furthermore, according to the present invention, the filler is injected into the injection space where the temperature measuring element is arranged. For this reason, it becomes possible to fix a temperature measuring element in the state arrange | positioned in the vicinity of a coil. Accordingly, it is possible to prevent the temperature measuring element from being displaced due to vibration during operation of the rotating electrical machine or the like, or coming off the mounting position over a long period of time.

It is an appearance front view of a power unit provided with a motor (rotary electric machine) having a stator and a rotor according to an embodiment of the present invention. It is a figure which shows the state which looked at the said motor from the inner side of the said motor in the direction opposite to FIG. FIG. 3 is a partially enlarged view of FIG. 2. It is a partial expansion perspective view of the power unit. It is an external appearance perspective view of the insulator when it sees from a back surface-plane-left side. It is a top view of the insulator. It is a left view of the said insulator. It is a front view of the insulator. It is an external appearance perspective view of a temperature sensor. It is a perspective view which shows the state which attached the said temperature sensor to the said insulator. It is a perspective view which shows a mode that the said temperature sensor is attached to the said insulator. It is a 1st section side view showing signs that the temperature sensor is attached to the insulator. It is a 2nd section side view showing signs that the temperature sensor is attached to the insulator. It is a 3rd section side view showing signs that the temperature sensor is attached to the insulator. It is a 4th section side view showing signs that the temperature sensor is attached to the insulator. It is a partial expansion perspective view which shows the state which attached the said temperature sensor to the said insulator in the state which abbreviate | omitted the coil. It is the figure which looked at the state of FIG. 15 from another direction.

A. Embodiment 1 FIG. Configuration [1-1. overall structure]
FIG. 1 is an external front view of a power unit 10 including a motor 12 (rotating electrical machine) having a stator 20 and a rotor 22 according to an embodiment of the present invention. FIG. 2 is a diagram illustrating a state in which the motor 12 is viewed from the inside of the motor 12 in the direction opposite to that in FIG. FIG. 3 is a partially enlarged view of FIG. FIG. 4 is a partially enlarged perspective view of the power unit 10.

  The power unit 10 in the present embodiment is used for driving an electric vehicle, and the motor 12 is connected to the transmission 14. The motor 12 can also be used in a vehicle such as a hybrid vehicle in which the motor 12 and the engine are combined, or a device other than the vehicle.

  The motor 12 in this embodiment is a so-called three-phase AC brushless type, and includes a stator 20 and a rotor 22. The motor 12 is driven based on electric power supplied from a power source (not shown) via the U-phase terminal 24, the V-phase terminal 26, and the W-phase terminal 28, respectively. When the motor 12 is used as a vehicle drive source or the like, regenerative power is output via the U-phase terminal 24, the V-phase terminal 26, and the W-phase terminal 28.

[1-2. Configuration of Stator 20]
(1-2-1. Overall Stator 20)
The stator 20 includes an annular stator core 30 (FIG. 1, etc.), teeth 32 (FIG. 8, FIG. 12, etc.) formed to protrude from the stator core 30 toward the inner diameter side, and a plurality of insulators 34 ( Insulating member (FIG. 2 etc.), a plurality of coils 36 (FIG. 1 etc.) constituted by wirings 38 (for example, insulation coated copper wires) wound around each of the plurality of insulators 34, and one temperature of the coil 36 Temperature sensor 40 (temperature measuring element) (FIG. 1, FIG. 10 and the like) for detecting, and an attachment part 42 (FIG. 1 and the like) for attaching the stator 20 to another member (here, transmission 14). The stator core 30 of the present embodiment is a combination of a plurality of divided cores. Instead, the stator core 30 may be integrally formed.

(1-2-2. Insulator 34)
(1-2-2-1. Overall configuration of the insulator 34)
5 is an external perspective view of the insulator 34 when viewed from the back-plane-left side, FIG. 6 is a plan view of the insulator 34, and FIG. 7 is a left-side view of the insulator 34. 8 is a front view of the insulator 34. 5 to 8, arrows x1, x2, y1, y2, z1, and z2 are arrows X1 and X2 in FIGS. 1 to 4 when the insulator 34 is on the upper side of the motor 12 (the arrow Z1 side in FIG. 1 and the like). , Y1, Y2, Z1, and Z2, but when the insulator 34 is not on the upper side of the motor 12, it does not correspond except for the arrows Y1 and Y2 (axial direction of the motor 12 or the stator 20).

  As shown in FIGS. 1 and 3 and FIG. 10 described later, in this embodiment, a plurality of insulators 34 are connected and used. 5 to 8, the directions of the arrows x1 and x2 substantially correspond to the circumferential direction of the stator 20 (the directions of the arrows C1 and C2 in FIG. 2), and the arrows y1 and y2 are the axial directions of the stator 20 { That is, it corresponds to the direction of the output shaft 18 of the motor 12 (directions of arrows Y1 and Y2 in FIG. 4)}, and the arrows z1 and z2 correspond to the radial direction of the stator 20 (directions of arrows R1 and R2 in FIG. 2). To do.

  As shown in FIGS. 5 to 8, the insulator 34 includes a body portion 50, a first extension portion 52, and a second extension portion 54. The first extending portion 52 extends from the end of the body portion 50 on the arrow z1 side (the outer peripheral side of the stator 20) to the arrow y2 side (the axial direction of the stator 20). The second extending portion 54 extends from the end of the trunk portion 50 on the arrow z2 side (inner peripheral side of the stator 20) to the arrow y2 side (axial direction of the stator 20).

(1-2-2-2. Torso 50)
The body portion 50 is formed with a teeth insertion portion 56 (FIGS. 6 and 8) for fitting the teeth 32 in the direction of the arrow y2. In addition, the body 50 is wound with the wiring 38 constituting the coil 36 (see FIGS. 3 and 10 and the like) in a state where the teeth 32 are fitted in the teeth fitting portion 56 (see FIG. 8).

(1-2-2-3. First extending portion 52)
The first extension part 52 is a part for accommodating the wiring 58 connected to the coil 36, and the like. The first wall part 60 (base part), the second wall part 62 (first flange part), and the third wall part. 64 (second flange portion). The first wall portion 60 is a plate-like portion protruding from the body portion 50 in the arrow z1 direction {radially outward of the stator 20 (in the arrow R1 direction in FIG. 2)}.

  The second wall portion 62 is a plate that protrudes in a direction indicated by an arrow y2 {an axial direction of the stator 20 (an arrow Y2 direction in FIG. 4)} from a portion of the first wall portion 60 on the body portion 50 side (inner radial direction of the stator 20). It is a shape part. The second wall 62 is formed with a first opening 66 for allowing a part of the temperature sensor 40 (temperature detection unit 94) to pass therethrough. Further, a groove 68 is formed on the surface of the second wall 62 on the arrow z2 side (in the radial direction of the stator 20) along the arrow y2 direction {the axial direction of the stator 20 (the arrow Y2 direction in FIG. 4)}. ing. The groove 68 is used to restrict the displacement of the temperature sensor 40 in the directions of the arrows x1 and x2 by being combined with a flange 96 (FIG. 9) of the temperature sensor 40 described later.

  The third wall portion 64 extends in a direction indicated by an arrow y2 {an axial direction of the stator 20 (a direction indicated by an arrow Y2 in FIG. 4)} from a portion of the first wall portion 60 opposite to the body portion 50 (outside in the radial direction of the stator 20) It is a protruding plate-like part. Near the center of the third wall portion 64, a second opening 70 is formed for engaging with a fixing member 79 (FIG. 11 and the like) that bundles the three-phase bus ring 77.

  A concave portion 72 is formed by the first wall portion 60, the second wall portion 62, and the third wall portion 64. The concave portion 72 is used for fixing the temperature sensor 40 in addition to housing the wiring 58 and forming a filling region (injection space 74) of the potting material 100 (FIG. 15) described later (details will be described later). ). The wiring 58 in the injection space 74 is connected to the wiring 38 via the connection terminal 76 (FIG. 10). In addition, a bus ring 77 is configured by the plurality of wires 58.

(1-2-2-4. Second extension 54)
The second extending part 54 is a part for accommodating the midpoint terminal 78 (FIG. 10) and has a fourth wall part 80 (base part), a fifth wall part 82, and a sixth wall part 84. The fourth wall portion 80 is a plate-like portion extending from the body portion 50 in the arrow z2 direction {inner radial direction of the stator 20 (in the arrow R2 direction in FIG. 2)}. The fifth wall portion 82 extends from the portion of the fourth wall portion 80 on the body portion 50 side (outside of the sixth wall portion 84 in the radial direction of the stator 20) in the arrow y2 direction {the axial direction of the stator 20 (arrow Y2 in FIG. 4). Direction)}. The sixth wall portion 84 extends from the portion of the fourth wall portion 80 on the opposite side to the body portion 50 (in the radial direction from the fifth wall portion 82) in the direction of arrow y2 {the axial direction of the stator 20 (arrow Y2 in FIG. 4). Direction)}.

(1-2-3. Temperature sensor 40)
FIG. 9 is an external perspective view of the temperature sensor 40. The temperature sensor 40 is used to detect overheating of the coil 36 and protect the coil 36. That is, the temperature sensor 40 detects the temperature of the coil 36 and outputs it to the control device (not shown) via the sensor wiring 92. When it is determined that the coil 36 is in an overheated state based on the temperature of the coil 36, for example, the control device reduces or stops the output of the motor 12 to reduce the temperature of the coil 36.

  As shown in FIG. 9, the temperature sensor 40 includes a sensor main body 90 based on an elongated rectangular parallelepiped shape, and a sensor wiring 92. A temperature detecting portion 94 that protrudes from a rectangular parallelepiped shape is formed on the distal end side of the sensor main body 90. In addition, a flange 96 that protrudes from a rectangular parallelepiped shape is formed at a substantially central portion of the temperature sensor 40. For example, a thermistor can be used as the temperature sensor 40 of the present embodiment.

  Further, the temperature sensor 40 is disposed apart from the oil pipe 98 shown in FIGS. The oil pipe 98 circulates oil as a cooling medium for cooling the motor 12. In the present embodiment, the oil pipe 98 is sufficiently separated from the temperature sensor 40 so that the oil flowing in the oil pipe 98 has no influence (or very slight) on the detection accuracy of the temperature sensor 40. To do.

  FIG. 10 is a perspective view showing a state in which the temperature sensor 40 is attached to the insulator 34. As shown in FIG. 10, the flange portion 96 of the temperature sensor 40 is fitted into the groove 68 of the second wall portion 62 of the insulator 34. Accordingly, the temperature sensor 40 corresponds to the directions of arrows x1 and x2 in FIG. 5 and the like {substantially the circumferential direction of the stator 20 (directions of arrows C1 and C2 in FIG. 2). } Can be prevented.

2. Attaching Method of Temperature Sensor 40 FIG. 11 is a perspective view showing how the temperature sensor 40 is attached to the insulator 34. 12 to 15 are first to fourth cross-sectional side views showing how the temperature sensor 40 is attached to the insulator 34. FIG. 16 is a partially enlarged perspective view showing a state in which the temperature sensor 40 is attached to the insulator 34 with the coil 36 omitted. FIG. 17 is a view of the state of FIG. 15 viewed from another direction (the same direction as FIG. 2).

  When the temperature sensor 40 is attached to the insulator 34, first, as shown in FIGS. 11 and 12, the temperature sensor 40 is inserted into the recess 72 (injection) of the insulator 34 from the axial direction of the stator 20 (the direction of arrow D1 in FIGS. 11 and 12). Approaching the space 74).

  When the temperature sensor 40 enters the recess 72 (injection space 74), as shown in FIG. 13, the temperature sensor 40 is displaced toward the radially inner side of the stator 20 (in the direction of arrow D2 in FIG. 13). As a result, the temperature detector 94 of the temperature sensor 40 is inserted into the first opening 66 of the insulator 34. At this time, the flange portion 96 of the temperature sensor 40 is prevented from coming into contact with the second wall portion 62 of the insulator 34.

  Next, as shown in FIG. 14, the temperature sensor 40 is displaced in the axial direction of the stator 20 (in the direction of arrow D <b> 3 in FIG. 14) while the temperature detection unit 94 is in the first opening 66. As a result, the flange portion 96 of the temperature sensor 40 is fitted into the groove 68 of the insulator 34 to form a locking portion (hereinafter referred to as “upper locking portion”), resulting in a state as shown in FIGS. 10 and 16. At this time, the temperature detection unit 94 can detect the temperature near the center of the coil 36 by contacting the second-layer wiring 38 counted from the body 50 side. The temperature detector 94 may be in contact with other parts of the coil 36 or may be disposed away from the wiring 38. Further, as noted above, it should be noted that the coil 36 is not shown in FIG.

  Next, as shown in FIGS. 15 and 17, the potting material 100 is filled in the injection space 74 (including the first opening 66), and the temperature sensor 40 is fixed to the insulator 34. As a result, the temperature sensor 40 is fixed by the potting material 100 in addition to the upper locking portion formed by the flange portion 96 and the groove 68 and the lower locking portion formed by the temperature detection portion 94 and the periphery of the first opening 66. .

  In addition, the potting material 100 can use an insulating substance (epoxy resin etc.), for example. Further, the filling amount of the potting material 100 in this embodiment is such that the injection space 74 as a space partitioned by the first wall portion 60, the second wall portion 62, and the third wall portion 64 as shown in FIG. It is assumed that the amount is satisfied. Alternatively, the potting material 100 may be other filling amount as long as the temperature sensor 40 can be fixed and insulation in the bus ring 77 can be secured. Alternatively, other filling amounts can be used as described later.

  The temperature detection part 94 fixed by the potting material 100 forms a locking part (hereinafter referred to as “lower locking part”) between the second wall part 62 and the part around the first opening 66. .

3. Effects of the Present Embodiment As described above, according to the present embodiment, the temperature sensor 40 is placed in the continuous concave portion (injection space 74) formed by the continuous concave portion 72 of the first extension portion 52 of the insulator 34. Fixed. Since the first extending portion 52 extends from the trunk portion 50 around which the wiring 38 constituting the coil 36 is wound, the temperature sensor 40 can be positioned in the vicinity of the coil 36. Further, the first extending portion 52 is provided in the same insulator 34 as the trunk portion 50 around which the wiring 38 constituting the coil 36 is wound. For this reason, for example, the temperature sensor 40 is provided even when the temperature sensor 40 is not directly fixed to the stator 20 or the housing (not shown) of the motor 12 or the coil 36 and the number of parts is not increased. It becomes possible. Accordingly, the degree of freedom of arrangement or design regarding the temperature sensor 40 can be increased.

  Further, the recess 72 for fixing the temperature sensor 40 is recessed in the axial direction of the stator 20 (the direction of the arrow Y1 in FIG. 4). For this reason, when fixing the temperature sensor 40, the temperature sensor 40 is caused to enter the recess 72 from the axial direction of the stator 20 (see FIG. 11 and the like). Therefore, even if the temperature sensor 40 is difficult to enter from the radial direction (arrow R1, R2 direction in FIG. 2) or the circumferential direction (arrow C1, C2 direction in FIG. 2) of the stator 20, the temperature The sensor 40 can be arranged and fixed. Therefore, it is possible to improve the degree of freedom in assembling the temperature sensor 40.

  In addition, in this embodiment, since each insulator 34 has the same configuration, the temperature sensor 40 can be fixed to any insulator 34. Therefore, also from this point, the degree of freedom in assembling the temperature sensor 40 can be improved.

  Furthermore, according to the present embodiment, the potting material 100 is injected into the injection space 74 in which the temperature sensor 40 is disposed. For this reason, it becomes possible to fix the temperature sensor 40 in the state arrange | positioned in the vicinity of the coil 36. FIG. Therefore, it is possible to prevent the temperature sensor 40 from being displaced due to vibration during operation of the motor 12 or the like from being detached from the mounting position over a long period of time.

  In the present embodiment, the first extension portion 52 is formed with a first opening 66 penetrating from the concave portion 72 toward the coil 36, and the temperature detection portion 94 (temperature measurement portion) of the temperature sensor 40 is the first extension portion 52. It faces the coil 36 through one opening 66. Thereby, since the insulator 34 does not intervene between the temperature detection part 94 and the coil 36, the temperature detection part 94 can measure the temperature of the coil 36 more accurately.

  In the present embodiment, the temperature detection unit 94 of the temperature sensor 40 is inserted into the first opening 66, and the temperature detection unit 94 is between the second wall portion 62 and the portion around the first opening 66. The movement is restricted by the locking portion (lower locking portion). In addition, the collar portion 96 is engaged with the groove 68 of the first extending portion 52 to constitute an upper locking portion. As a result, it is possible to more effectively suppress the displacement of the temperature sensor 40.

  In the present embodiment, a wiring 58 (bus ring 77) for supplying a current to the coil 36 is disposed in the injection space 74, and the potting material 100 is made of an insulating material. As a result, the potting material 100 is used to insulate the connection terminals 76 (connection portions) between the wiring 38 and the wiring 58 from the surroundings and to fix the temperature sensor 40. Therefore, it is possible to prevent an increase in the number of processes at the time of manufacture and suppress a decrease in production efficiency.

B. Modifications It should be noted that the present invention is not limited to the above-described embodiment, and it is needless to say that various configurations can be adopted based on the contents described in this specification. For example, the following configuration can be adopted.

1. Mounting target In the above-described embodiment, the motor 12 is mounted on the vehicle. However, the present invention is not limited to this as long as it is a device or apparatus having a rotating electrical machine including a temperature measuring element that measures the temperature of the coil.

2. Motor 12
In the above embodiment, the motor 12 is a three-phase AC brushless type, but is not limited to this as long as it includes a temperature measuring element that measures the temperature of the coil. For example, a three-phase AC brush type or a single-phase AC type may be used.

3. Insulator 34
Insulator 34 of the above-mentioned embodiment has body part 50, the 1st extension part 52, and the 2nd extension part 54, but if this has at least body part 50 and the 1st extension part 52, to this Not exclusively. For example, a configuration without the second extending portion 54 is also possible.

  In the above embodiment, the first extending portion 52 is in the z1 direction {radially outward of the stator 20 (in the direction of arrow R1 in FIG. 2)} and y2 direction {axial direction of the stator 20 (in FIG. 4). However, the present invention is not limited to this as long as it is located at least in the z1 direction with respect to the body portion 50. However, the term “positioned in the z1 direction with respect to the barrel portion 50” here refers to a portion of the trunk portion 50 where the wiring 38 is not wound in the radial direction of the stator 20 (the direction of the arrow R1 or R2 in FIG. 2). In this case, this means that the portion is also included in the first extension portion 52. In other words, when the portion where the wiring 38 is not wound in the radial direction of the stator 20 exists in the body portion 50, the temperature sensor 40 may be disposed by providing the concave portion 72 recessed in the axial direction of the stator 20 in the portion. Is possible.

  In the above embodiment, the concave portion 72 of the first extending portion 52 is configured by the first wall portion 60, the second wall portion 62, and the third wall portion 64, but the axial direction of the stator 20 (the direction of the arrow Y1 in FIG. 4). Or, it is not limited to this as long as it is recessed in the direction of arrow Y2. For example, the concave portion 72 may be configured to be curved rather than three planar wall portions (the first wall portion 60, the second wall portion 62, and the third wall portion 64).

  In the above embodiment, the concave portion 72 (injection space 74) constituted by the first extension portion 52 is also used for housing the wiring 58 (bus ring 77). However, as long as the temperature sensor 40 is disposed inside. The use of the recess 72 is not limited to this. For example, the recess 72 (injection space 74) may be formed to accommodate only the temperature sensor 40.

  In the above embodiment, the first opening 66 for allowing the temperature detection unit 94 of the temperature sensor 40 to pass through is formed in the second wall 62, but a configuration in which the first opening 66 is not formed is also possible. Moreover, in the said embodiment, although the 1st opening part 66 was formed along the radial direction (arrow R1, R2 direction of FIG. 2) of the stator 20, the formation angle of the 1st opening part 66 is not restricted to this. .

  In the above-described embodiment, the first openings 66 are formed in all the insulators 34. However, the first openings 66 are formed only in some insulators 34, for example, the first openings 66 are formed only in the insulator 34 provided with the temperature sensor 40. 66 may be formed.

4). Temperature sensor 40
In the above embodiment, the temperature sensor 40 is a thermistor. However, the temperature sensor 40 is not limited to this as long as the temperature of the coil 36 can be detected. For example, the temperature sensor 40 may use a thermocouple, a resistance temperature detector, or the like.

  In the above embodiment, the number of temperature sensors 40 is 1, but the number of temperature sensors 40 is not limited to this. For example, the number of temperature sensors 40 may be three in order to provide the temperature sensors 40 in each phase. Alternatively, one temperature sensor 40 may be provided for every insulator 34. Alternatively, a configuration in which two temperature sensors 40 are provided in one insulator 34 is also possible.

  In the above-described embodiment, the temperature sensor 40 is fixed to the second wall portion 62. However, the temperature sensor 40 may be fixed at other parts as long as the temperature of the coil 36 can be detected. For example, the temperature sensor 40 can be fixed to the first wall portion 60 or the third wall portion 64. Further, the temperature sensor 40 may be provided on the second extension portion 54 (inner peripheral side of the stator 20) instead of the first extension portion 52.

  In the above embodiment, the temperature detection unit 94 of the temperature sensor 40 is brought close to the coil 36 through the first opening 66, but the second wall 62 may be interposed between the temperature detection unit 94 and the coil 36. it can. Further, instead of the first opening 66 serving as a through hole, a bottomed hole may be formed, and the temperature detection unit 94 may be inserted into the hole.

  In the above embodiment, the flange portion 96 is locked to the groove 68 of the insulator 34 and the temperature sensor 40 is fixed using the potting material 100. However, the temperature sensor 40 may be fixed by other methods. For example, the flange portion 96 may be formed in the insulator 34 and the groove 68 may be formed in the temperature sensor 40. Alternatively, the temperature sensor 40 can be fixed only by the potting material 100. Alternatively, the flange portion 96 may be locked in the groove 68, and the temperature sensor 40 and the inner surface of the second wall portion 62 facing the same may be bonded with an adhesive.

5. Potting material 100
In the above embodiment, the filling amount of the potting material 100 fills all of the injection space 74 as a space partitioned by the first wall portion 60, the second wall portion 62, and the third wall portion 64, as shown in FIG. Although it is an amount, the filling amount is not limited to this. For example, as long as at least one of fixing of the temperature sensor 40 and insulation in the bus ring 77 can be secured, the potting material 100 may be other filling amount. Alternatively, a configuration in which the temperature sensor 40 is fixed without the potting material 100 (for example, a configuration in which the upper locking portion and the adhesive are fixed, or a configuration in which only the adhesive is used) is possible.

  In the said embodiment, although the epoxy resin was used as the potting material 100, if it is a material which functions as a filler for fixing the temperature sensor 40, it will not restrict to this. For example, urethane resin may be used as the potting material 100. In this case, when the potting material 100 is used for insulating the wiring 58 (bus ring 77), an insulating material is preferable.

DESCRIPTION OF SYMBOLS 12 ... Motor (rotary electric machine) 20 ... Stator 30 ... Stator core 32 ... Teeth 34 ... Insulator (insulating member) 36 ... Coil 38 ... Wiring 40 ... Temperature sensor (temperature measuring element)
50 ... trunk 52 ... first extension (extension)
58 ... Wiring (distribution member) 66 ... First opening (opening)
68 ... Groove 72 ... Recess 74 ... Injection space (continuous recess) 77 ... Bus ring (distribution member)
94 ... Temperature detection unit (temperature measuring unit) 96 ... Hook 100 ... Potting material (filler)

Claims (7)

An annular stator core;
Teeth formed protruding from the stator core;
A plurality of insulating members attached to the teeth;
A plurality of coils composed of wiring wound around each of the plurality of insulating members;
A stator of a rotating electrical machine, comprising: a temperature measuring element that detects at least one temperature of the plurality of coils;
The plurality of insulating members are arranged side by side in the circumferential direction of the stator,
Each of the plurality of insulating members is
A body around which the wiring is wound;
An extending portion extending in the radial direction of the stator from an end portion of the body portion in the radial direction of the stator,
The extending portion has a recess that is continuous in the circumferential direction of the stator and is recessed in the axial direction of the stator with respect to an end surface of the extending portion in the axial direction of the stator,
An injection space for injecting a filler is formed by connecting the concave portions of the insulating members adjacent to each other in the circumferential direction of the stator,
The temperature measuring element is disposed in the injection space and fixed with the filler injected into the injection space. The stator according to claim 1, wherein
The extension portion is formed with an opening penetrating from the concave portion toward the coil,
The temperature measuring unit of the temperature measuring element is opposed to the coil through the opening. The stator according to claim 2, wherein
The stator according to claim 1, wherein at least a part of the temperature measuring element is inserted into the opening, whereby the temperature measuring element is locked to the extension portion to form a locking portion. The stator according to any one of claims 1 to 3,
The temperature measuring element is disposed along the inner wall of the recess,
A flange portion is formed on the radially inner surface of the stator in the temperature measuring element,
The said collar part is latched with respect to the said extension part. The stator characterized by the above-mentioned. In the stator according to any one of claims 1 to 4,
A groove extending along the axial direction of the stator is formed in one of the temperature measuring element or the extending portion, and the other is fitted in the groove. In the stator according to any one of claims 1 to 5,
A power distribution member for supplying current to the coil is disposed in the injection space;
The stator is made of an insulating material. An annular stator core;
Teeth formed protruding from the stator core;
A plurality of insulating members attached to the teeth;
A plurality of coils composed of wiring wound around each of the plurality of insulating members;
A stator of a rotating electrical machine, comprising: a temperature measuring element that detects at least one temperature of the plurality of coils;
The plurality of insulating members are arranged side by side in the circumferential direction of the stator,
Each of the plurality of insulating members is
A body around which the wiring is wound;
An extending portion extending in the radial direction of the stator from an end portion of the body portion in the radial direction of the stator,
The extending portion has a recess that is continuous in the circumferential direction of the stator and is recessed in the axial direction of the stator with respect to an end surface of the extending portion in the axial direction of the stator,
An annular recess is formed by connecting the recesses of the insulating members adjacent in the circumferential direction of the stator,
The stator, wherein the temperature measuring element is fixed in the annular recess.

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