Temperature detection device

Abstract

To provide a temperature detector in which a thermistor is appropriately arranged in a rotational electric machine having the thermistor for detecting a temperature of a coil.SOLUTION: A temperature detector is a temperature detector provided to a rotary electric machine 1, that comprises: a stator core 10; and a coil 40 wound to the stator core 10. The temperature detector comprises: an insulator 20 which is arranged between the stator core 10 and the coil 40, and of which one side of a direction orthogonal to a winding shaft direction of the coil 40 is contacted to the iron core 10, and the other side includes a winding part 21 contacted to the coil 40, and which electrically insulates a space between the stator core 10 and the coil 40; a thermistor 50 that is embedded into the winding part 21, and detects a temperature of the coil 40; and a terminal 60 that is connected to the thermistor 50 in an inner part of the insulator 20, and is led to an external part of the insulator 20.SELECTED DRAWING: Figure 7

Description

Technical Field

[0001] The present invention relates to a temperature detection device.

Background Art

[0002] In recent years, efforts to achieve a low-carbon society or a decarbonized society have become active, and research and development on electrification technologies have been conducted in vehicles to reduce CO2 emissions and improve energy efficiency. An electric vehicle is equipped with a rotating electric machine as a prime mover. The rotating electric machine includes a stator around which a coil is wound and a rotor rotatably provided with respect to the stator. The stator includes a stator core around which a coil is wound. An insulator for achieving electrical insulation between the stator core and the coil is attached to the stator core. A temperature detection element for detecting the temperature of the coil may be arranged in the stator (see, for example, Patent Document 1). Patent Document 1 discloses an insulating bobbin that houses a stator core on the inner periphery and is wound so as to laminate windings on the outer periphery, the insulating bobbin being provided with a winding surface wound so as to laminate the windings and a temperature detection element fixing groove formed in the winding surface for fixing a temperature detection element for detecting the temperature of the windings.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, in electrification technology, rotary electric machines have the following problems. When a temperature detection element is exposed on the winding surface of an insulator, there is a possibility that the winding may come into contact with the temperature detection element and winding disorder of the coil may occur. When winding disorder occurs in the coil, the generated magnetic field may be disturbed and the efficiency of the rotary electric machine may decrease. Further, when the winding comes into contact with the temperature detection element, stress may be applied to the temperature detection element during the winding operation of the coil. When excessive stress is applied to the temperature detection element, the temperature of the coil cannot be accurately detected, and it may become difficult to keep the rotary electric machine in a desired state. Therefore, in conventional rotary electric machines, there is room for improvement in the arrangement of the temperature detection element.

[0005] In order to solve the above problems, the present application aims to appropriately arrange a thermistor in a rotary electric machine including a thermistor that detects the temperature of a coil. And, by extension, it contributes to the improvement of energy efficiency.

Means for Solving the Problems

[0006] A temperature detection device according to a first aspect of the present invention is a temperature detection device provided in a rotary electric machine (1) including a core (10) and a coil (40) wound around the core (10), the temperature detection device being disposed between the core (10) and the coil (40), having a winding portion (21) in which one side in a direction orthogonal to the winding axis direction of the coil (40) is in contact with the core (10) and the other side is in contact with the coil (40), an insulator (20) that electrically insulates between the core (10) and the coil (40), a thermistor (50) embedded in the winding portion (21) and detecting the temperature of the coil (40), and a terminal (60) that is connected to the thermistor (50) inside the insulator (20) and drawn out to the outside of the insulator (20).

[0007] According to the first aspect, since the thermistor is embedded in the winding portion, the coil does not contact the thermistor. Therefore, the winding disorder of the coil can be suppressed, and the disorder of the generated magnetic field due to the winding disorder can also be suppressed. Further, since the coil does not contact the thermistor, when the coil is wound around the winding portion, it is possible to suppress the tension of the coil from being transmitted to the thermistor and an excessive stress being applied to the thermistor. As described above, it is possible to provide a temperature detection device in which the thermistor is appropriately arranged.

[0008] The temperature detection device according to the second aspect of the present invention is the temperature detection device according to the first aspect, wherein the winding portion (21) has a winding surface (22) in contact with the coil (40), and the thermistor (50) may be located between the winding surface (22) and the iron core (10) in a direction intersecting the winding axis direction.

[0009] According to the second aspect, the temperature of the portion near the inner circumference of the coil can be measured by the thermistor. Therefore, it is possible to accurately measure the temperature of the coil.

[0010] The temperature detection device according to the third aspect of the present invention is the temperature detection device according to the first aspect or the second aspect, wherein the insulator (20) is formed with a housing recess (30) for housing the thermistor (50), further includes a filler (70) for filling the housing recess (30), and a part of the terminal (60) may be located in the housing recess (30) and connected to the thermistor (50).

[0011] According to the third aspect, the deformation of the winding portion that causes the housing recess to shrink can be restricted by the filler. For this reason, it is possible to more reliably suppress the tension of the coil from being transmitted to the thermistor and an excessive stress being applied to the thermistor.

[0012] The temperature detection device according to the fourth aspect of the present invention is the temperature detection device according to any one of the first to third aspects, wherein the insulator (20) is formed with a housing recess (30) in which the thermistor (50) is housed, the insulator (20) has wall surfaces (35, 36) defining the housing recess (30), and the wall surfaces (35, 36) may have a recess (37) into which a part of the thermistor (50) enters.

[0013] According to the fourth aspect, since the thermistor engages with the opening edge of the recess, displacement of the thermistor can be suppressed. Therefore, the positional accuracy of the thermistor 50 can be improved.

Effect of the Invention

[0014] According to the present invention, a temperature detection device in which a temperature detection element is appropriately arranged can be provided.

Brief Description of the Drawings

[0015]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Mode for Carrying Out the Invention

[0016] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same reference numerals are given to configurations having the same or similar functions. And the overlapping descriptions of those configurations may be omitted.

[0017] The rotating electrical machine 1 of this embodiment is an inner rotor type three-phase permanent magnet synchronous motor. The rotating electrical machine 1 is a driving motor mounted on a vehicle such as an electric two-wheeler, for example. The rotating electrical machine 1 includes a rotor that rotates integrally with a rotating shaft, and a stator 3 that surrounds the rotor. Note that the rotor and the stator 3 are arranged coaxially with each other. Hereinafter, the direction in which the common axis of the rotor and the stator 3 extends will be referred to as the axial direction, the direction orthogonal to the common axis will be referred to as the radial direction, and the direction of rotation around the common axis will be referred to as the circumferential direction for description. Also, in the drawings used in the following description, arrow A indicates the axial direction, arrow R indicates the radial direction, and arrow P indicates the circumferential direction, respectively.

[0018] FIG. 1 is a perspective view of a part of the stator according to the embodiment. FIG. 2 is a view of a part of the stator shown in FIG. 1 as seen from the axial direction. As shown in FIGS. 1 and 2, the stator 3 includes a stator core 10 (iron core), an insulator 20, and a coil 40. In this embodiment, the winding axis direction of the coil 40 coincides with the radial direction.

[0019] The stator core 10 is formed by annularly arranging a plurality of divided cores 11 along the circumferential direction. For example, the divided core 11 is composed of laminating a plurality of T-shaped electromagnetic steel sheets punched by pressing. The divided core 11 includes a back yoke piece 12 extending along the circumferential direction and teeth 13 extending radially inward from the back yoke piece 12. The back yoke pieces 12 form the annular back yoke of the stator core 10 when the divided cores 11 are connected in the circumferential direction. The teeth 13 form slots 14 between adjacent teeth 13 when the divided cores 11 are connected in the circumferential direction. The radially inner ends of the teeth 13 face the magnetic pole portions of the rotor.

[0020] The insulator 20 is attached to each divided core 11 so as to surround the teeth 13. The insulator 20 is formed of an electrical insulating material such as resin. For example, the insulator 20 is formed of polyphenylene sulfide. The insulator 20 includes a winding portion 21 along the outer peripheral surface of the teeth 13, an inner flange 24 protruding from the radially inner edge of the winding portion 21, and an outer flange 25 protruding from the radially outer edge of the winding portion 21. The winding portion 21 is disposed between the teeth 13 and the coil 40, with one side in the direction orthogonal to the winding axis direction of the coil 40 contacting the stator core 10 and the other side contacting the coil 40. The winding portion 21 has a winding surface 22 that contacts the coil 40 from its inner peripheral side (see FIG. 3).

[0021] The winding portion 21 includes a first end face covering portion 21a that covers the first end face facing the first axial direction in the teeth 13, a second end face covering portion (not shown) that covers the second end face facing the second axial direction in the teeth 13, and a pair of side face covering portions 21c that cover a pair of side faces facing the circumferential direction (see also FIG. 3). The inner flange 24 and the outer flange 25 extend so as to surround the teeth 13 over the entire circumference. The outer flange 25 is along the inner circumferential surface of the back yoke piece 12. A winding groove 28 in which the coil 40 wound around the winding portion 21 is disposed is formed between the inner flange 24 and the outer flange 25. The outer flange 25 has a protruding portion 26 located in the first direction of the back yoke piece 12 of the split core 11 when viewed in the radial direction.

[0022] FIG. 3 is a perspective view of the first insulator according to the embodiment. Note that FIG. 3 shows a state in which a filler 70 described later is not disposed. As shown in FIGS. 1 and 3, the insulator 20 is divided into a first insulator 201 and a second insulator 202. The dividing position of the first insulator 201 and the second insulator 202 is at a position corresponding to the intermediate portion in the axial direction in the teeth 13. Note that the intermediate portion may be located between one end and the other end in the axial direction in the teeth 13. The insulator 20 is axially divided such that the dividing positions of the first insulator 201 and the second insulator 202 are located in the respective side face covering portions 21c. That is, the first insulator 201 has the entire first end face covering portion 21a.

[0023] As shown in FIG. 3, a thermistor 50 and a terminal 60 are incorporated in the insulator 20. The peripheral structures of these thermistor 50 and terminal 60 will be described later.

[0024] As shown in FIGS. 1 and 2, the coil 40 is formed by winding a wire around the tooth 13 via the insulator 20. The stator 3 is provided with a U-phase coil, a V-phase coil, and a W-phase coil. Each divided core 11 is wound with a coil 40 of either the U-phase coil, the V-phase coil, or the W-phase coil. The coil 40 is wound around the tooth 13 via the insulator 20 by concentrated winding.

[0025] The peripheral structure of the thermistor 50 and the terminal 60 will be described. Note that the thermistor 50 is an example of a temperature detection element. FIG. 4 is a perspective view of the thermistor and the terminal. FIG. 5 is a view of the thermistor and the terminal as seen from the outside in the radial direction. FIG. 6 is a view of the thermistor and the terminal as seen from the circumferential direction. As shown in FIGS. 3 to 6, the thermistor 50 includes an element body 51 and a pair of lead wires 52 extending from the element body 51. The element body 51 includes a resistor 51a and a glass part 51b covering the resistor 51a (see FIG. 9). The pair of lead wires 52 are electrically connected to the resistor 51a. The pair of terminals 60 are formed of a metal material. The pair of terminals 60 are electrically connected to the pair of lead wires 52 of the thermistor 50 one-to-one.

[0026] FIG. 7 is a cross-sectional view taken along line VII-VII of FIG. 2. FIG. 8 is a cross-sectional view at a position corresponding to line VIII-VIII of FIG. 7. Note that in FIG. 8, the filler 70 is shown by a virtual line. As shown in FIGS. 7 and 8, the thermistor 50 is embedded in the insulator 20 by being housed in a housing recess 30 formed in the insulator 20. The housing recess 30 is formed in the first insulator 201. At least a part of the housing recess 30 is located in the winding portion 21 of the insulator 20. The housing recess 30 is formed in the first end face covering portion 21a and overlaps the teeth 13 when viewed axially. In the present embodiment, the housing recess 30 overlaps the circumferential center position of the first end face of the teeth 13. The housing recess 30 extends radially outward from the position overlapping the teeth 13 when viewed axially and opens on the outer peripheral surface (outer peripheral surface of the outer flange 25) of the insulator 20. The housing recess 30 communicates with the space in the first direction of the back yoke piece 12 of the split core 11 through the opening 31 on the outer peripheral surface of the insulator 20. The housing recess 30 is non-opening on the inner peripheral surface and the outer peripheral surface (winding surface 22) of the winding portion 21. Thereby, the housing recess 30 does not communicate with the space where the teeth 13 are arranged and the winding groove 28. In the present embodiment, the housing recess 30 opens only on the outer peripheral surface of the insulator 20.

[0027] As shown in FIG. 8, the housing recess 30 includes a wide portion 32 and a narrow portion 33. The wide portion 32 extends radially inward from the opening 31. The narrow portion 33 communicates with the wide portion 32 on the side opposite to the opening 31. The circumferential width of the narrow portion 33 is smaller than the circumferential width of the wide portion 32. The narrow portion 33 is continuous with the intermediate portion in the circumferential direction of the wide portion 32. The narrow portion 33 extends radially inward from the connection portion with the wide portion 32. The circumferential width of the narrow portion 33 is larger than the width of the element body 51 of the thermistor 50.

[0028] FIG. 9 is a cross-sectional view at a position corresponding to the line IX-IX in FIG. 8. As shown in FIG. 9, the insulator 20 has a wall surface that defines the accommodation recess 30. The wall surface has a first wall surface 35 facing the first axial direction and a second wall surface 36 facing the second axial direction. The first wall surface 35 and the second wall surface 36 each extend in a direction orthogonal to the axial direction and are parallel to each other. The distance between the first wall surface 35 and the second wall surface 36 is set to be equal to or less than the thickness of the element body 51 of the thermistor 50.

[0029] As shown in FIGS. 8 and 9, a recess 37 extending in the extending direction (radial direction) of the accommodation recess 30 is formed in the first wall surface 35. The recess 37 extends from the opening 31 through the wide portion 32 to the narrow portion 33. In the present embodiment, the recess 37 extends over the entire length of the accommodation recess 30. The recess 37 extends radially with a constant width along the circumferential width center in the narrow portion 33. The width of the recess 37 is smaller than the circumferential width of the narrow portion 33 and smaller than the width of the element body 51 of the thermistor 50. A recess 37 is formed in the second wall surface 36 in the same manner as in the first wall surface 35. The recess 37 in the second wall surface 36 is formed at a position facing the recess 37 in the first wall surface 35 in the axial direction. The recess 37 in the second wall surface 36 is formed in the same manner as the recess 37 in the first wall surface 35.

[0030] As shown in FIG. 8, the element body 51 of the thermistor 50 is disposed in the narrow portion 33 of the accommodation recess 30. The element body 51 is located inside the winding portion 21. That is, the element body 51 is located between the winding surface 22 and the teeth 13 in the axial direction so as to overlap the teeth 13 and the coil 40 when viewed from the axial direction (see FIG. 7). By disposing the element body 51 in the accommodation recess 30, the insulator 20 is interposed between the element body 51 and each of the coil 40 and the teeth 13. As a result, the element body 51 is non-contact with the coil 40 and the stator core 10 and does not directly face the coil 40 and the stator core 10. The element body 51 overlaps the circumferential center position at the first end surface of the teeth 13. The element body 51 is disposed in the central region when the formation range of the winding groove 28 is equally divided into three in the radial direction.

[0031] As shown in FIG. 9, the element body 51 is sandwiched between the first wall surface 35 and the second wall surface 36 of the insulator 20. The element body 51 enters the recess 37 of the first wall surface 35 and the recess 37 of the second wall surface 36. By entering the recess 37 of the first wall surface 35 and the recess 37 of the second wall surface 36, the element body 51 engages with the opening edge of each recess 37 and is restricted from displacing in a direction intersecting the radial direction.

[0032] As shown in FIG. 8, the pair of lead wires 52 extend from the element body 51 toward the opening 31 side. Each lead wire 52 has a base end portion 52a connected to the element body 51 and extending along the radial direction in the narrow portion 33, and a tip end portion 52b bent from the end portion of the base end portion 52a on the side opposite to the element body 51 and extending in the circumferential direction in the wide portion 32. The tip end portions 52b of the pair of lead wires 52 extend in the circumferential direction so as to be separated from each other. The whole of each lead wire 52 is disposed in the accommodation recess 30.

[0033] FIG. 10 is a view of the periphery of the accommodation recess of the stator according to the embodiment as seen from the outside in the radial direction. Note that FIG. 10 shows a state in which the filler 70 is not disposed. As shown in FIGS. 3 and 10, each terminal 60 is insert-molded together with the insulator 20. A pair of terminals 60 are arranged at intervals in the circumferential direction. Each terminal 60 is connected to the thermistor 50 inside the insulator 20 and drawn out to the outside of the insulator 20. Each terminal 60 includes a covering portion 61 covered by the insulator 20, an outer extending portion 62 extending from the insulator 20 and exposed outside the insulator 20, and an inner extending portion 63. The outer extending portion 62 protrudes in the first direction from the end surface of the protruding portion 26 in the first direction. The inner extending portion 63 protrudes into the accommodation recess 30. The inner extending portion 63 is arranged along the wall surface defining the wide portion 32 of the accommodation recess 30 from the radially inner side. That is, the inner extending portion 63 is arranged at a position where it can be directly visually recognized from the radially outer side through the opening 31. The tip portion 52b of the lead wire 52 is overlapped and joined to the inner extending portion 63 from the radially outer side. The covering portion 61 extends axially from the inner extending portion 63 inside the protruding portion 26 to connect the outer extending portion 62 and the inner extending portion 63. The entire covering portion 61 is covered by the insulator 20.

[0034] As shown in FIG. 7, the accommodation recess 30 is filled with a filler 70. The filler 70 is formed of an electrical insulating material. The filler 70 is a material different from the insulator 20. For example, the filler 70 is an epoxy resin. The filler 70 is arranged to cover the entire element body 51 of the thermistor 50. For example, the filler 70 fills at least the entire narrow portion 33. Further, the filler 70 fills at least a part of the wide portion 32 so as to cover the inner extending portion 63 of the terminal 60 and the entire lead wire 52. The filler 70 is arranged so as not to protrude from the opening 31.

[0035] The first insulator 201 is insert-molded together with a pair of terminals 60. The first insulator 201 is integrated with the pair of terminals 60 with the inner extension portions 63 of the respective terminals 60 exposed radially outward within the accommodation recess 30. A thermistor 50 is inserted into the accommodation recess 30 of the first insulator 201, and the tip portion 52b of the lead wire 52 is overlapped with the inner extension portion 63 of the terminal 60. For example, the lead wire 52 and the terminal 60 are joined to each other by ultrasonic welding, spot welding, soldering, or the like. When joining the lead wire 52 and the terminal 60 by ultrasonic welding, an ultrasonic vibrator is inserted into the accommodation recess 30 from the opening 31 to join the lead wire 52 and the terminal 60 within the accommodation recess 30. With the thermistor 50 fixed to the pair of terminals 60, the accommodation recess 30 is filled with a filler 70. Thereby, the first insulator 201 incorporating the thermistor 50 and the terminals 60 is completed. The first insulator 201 is combined with the second insulator 202 and attached to the split core 11, and a coil 40 is wound around the winding portion 21 of the insulator 20 composed of the first insulator 201 and the second insulator 202, whereby a part of the stator 3 shown in FIG. 1 is completed.

[0036] As described above, the rotating electrical machine 1 of the present embodiment includes an insulator 20 having a winding portion 21 disposed between the stator core 10 and the coil 40, a thermistor 50 embedded in the winding portion 21 for detecting the temperature of the coil 40, and a terminal 60 connected to the thermistor 50 inside the insulator 20 and drawn out to the outside of the insulator 20, and has a temperature detection device. According to this configuration, since the thermistor 50 is embedded in the winding portion 21, the coil 40 does not contact the thermistor 50. Therefore, the winding disorder of the coil 40 can be suppressed, and the disorder of the generated magnetic field caused by the winding disorder can also be suppressed. Further, since the coil 40 does not contact the thermistor 50, when the coil 40 is wound around the winding portion 21, it is possible to suppress the tension of the coil 40 from being transmitted to the thermistor 50 and an excessive stress being applied to the thermistor 50. As described above, it is possible to provide a temperature detection device in which the thermistor 50 is appropriately arranged.

[0037] The thermistor 50 is positioned axially between the winding surface 22 and the stator core 10. According to this configuration, the temperature of the portion of the coil 40 near the inner circumference can be measured by the thermistor 50. Therefore, it becomes possible to accurately measure the temperature of the coil 40.

[0038] The insulator 20 is formed with a receiving recess 30 for receiving the thermistor 50. The temperature detection device further includes a filler 70 that fills the receiving recess 30. A part of the terminal 60 is located in the receiving recess 30 and is connected to the thermistor 50. According to this configuration, deformation of the winding portion 21 that causes the receiving recess 30 to shrink can be restricted by the filler 70. For this reason, it is possible to more reliably suppress the tension of the coil 40 from being transmitted to the thermistor 50 and an excessive stress from being applied to the thermistor 50.

[0039] The insulator 20 has a first wall surface 35 and a second wall surface 36 that define the receiving recess 30. The first wall surface 35 and the second wall surface 36 have a recess 37 into which a part of the thermistor 50 enters. According to this configuration, since the thermistor 50 engages with the opening edge of the recess 37, displacement of the thermistor 50 can be suppressed. Therefore, the positioning accuracy of the thermistor 50 can be improved.

[0040] The element body 51 of the thermistor 50 is arranged in the central region when the formation range of the winding groove 28 is equally divided into three in the radial direction. According to this configuration, the temperature of the central portion in the radial direction of the coil 40, which is more likely to become higher in temperature, can be measured by the thermistor 50. Therefore, the temperature of the coil 40 can be accurately measured.

[0041] The element body 51 of the thermistor 50 is covered with the filler 70. According to this configuration, it is possible to suppress an excessive stress from being applied to the glass portion 51b of the element body 51 due to the tension of the coil 40 transmitted to the element body 51 during winding of the coil 40, vibration during operation of the rotating electric machine 1, or the like.

[0042] Note that the present invention is not limited to the above-described embodiments described with reference to the drawings, and various modifications can be considered within its technical scope. For example, in the above embodiment, the coil 40 is wound around the teeth 13 by concentrated winding, but the coil may be wound around the teeth by distributed winding.

[0043] In the above embodiment, the teeth 13 extend in the axial direction, but the teeth may be extended in a direction inclined with respect to the axial direction to skew the stator core.

[0044] In the above embodiment, the present invention is applied to a radial gap type rotating electric machine in which the stator and the rotor have a magnetic gap in the radial direction. However, the present invention may be applied to an axial gap type rotating electric machine in which the stator and the rotor have a magnetic gap in the axial direction.

[0045] In the above embodiment, the filler 70 is filled in the accommodation recess 30 of the insulator 20, but it is not limited to this configuration. That is, the filler may not be filled in the accommodation recess 30, and the accommodation recess 30 may have a space surrounding at least a part of the thermistor 50.

[0046] In the above embodiment, the insulator 20 is divided into the first insulator 201 and the second insulator 202, but the insulator may not be divided. Also, the thermistor may be embedded at any position in the winding portion of the insulator. That is, the thermistor may be located between the winding surface and the stator core in a direction intersecting the winding axis direction of the coil.

[0047] In the above embodiment, the element body 51 of the thermistor 50 is sandwiched from both axial sides by the wall surface defining the accommodation recess 30, but the present invention is not limited to this configuration. The element body may be sandwiched from both circumferential sides by the wall surface defining the accommodation recess. Further, the element body may be arranged in a floating state with respect to the wall surface defining the accommodation recess. In the above embodiment, a pair of recesses 37 engaging with the element body 51 are formed on both axial sides with respect to the element body 51 on the wall surface defining the accommodation recess 30, but the present invention is not limited to this configuration. The above effects can be achieved as long as at least one recess engaging with the element body is formed, but the recess may not be formed.

[0048] In addition, without departing from the gist of the present invention, it is possible to appropriately replace the components in the above-described embodiment with well-known components.

Explanation of Reference Numerals

[0049] 1...Rotating electrical machine 10...Stator core (iron core) 20...Insulator 21...Winding portion 22...Winding surface 30...Accommodation recess 35...First wall surface (wall surface) 36...Second wall surface (wall surface) 37...Recess 40...Coil 50...Thermistor 60...Terminal 70...Filling agent

Claims

1. A temperature detection device provided in a rotating electrical machine (1) comprising a core (10) and a coil (40) wound around the core (10), An insulator (20) disposed between the core (10) and the coil (40), having a winding portion (21) in which one side in a direction orthogonal to the winding axis direction of the coil (40) is in contact with the core (10) and the other side is in contact with the coil (40), and electrically insulating between the core (10) and the coil (40), A thermistor (50) embedded in the winding portion (21) in a non-contact state with respect to the coil (40) for detecting the temperature of the coil (40), A terminal (60) connected to the thermistor (50) inside the insulator (20) and drawn out to the outside of the insulator (20), and a temperature detection device comprising the same.

2. A temperature detection device provided in a rotating electrical machine (1) comprising a core (10) and a coil (40) wound around the core (10), An insulator (20) disposed between the core (10) and the coil (40), having a winding portion (21) in which one side in a direction orthogonal to the winding axis direction of the coil (40) is in contact with the core (10) and the other side is in contact with the coil (40), and electrically insulating between the core (10) and the coil (40), A thermistor (50) embedded in the winding portion (21) for detecting the temperature of the coil (40), A terminal (60) connected to the thermistor (50) inside the insulator (20) and drawn out to the outside of the insulator (20), and comprising the same, The winding portion (21) has a winding surface (22) in contact with the coil (40), The thermistor (50) is located between the winding surface (22) and the core (10) in a direction intersecting the winding axis direction, Temperature detection device.

3. The insulator (20) is formed with a receiving recess (30) for receiving the thermistor (50). The temperature detection device further includes a filler (70) for filling the receiving recess (30). A part of the terminal (60) is located in the receiving recess (30) and is connected to the thermistor (50). The temperature detection device according to claim 1 or claim 2.

4. The insulator (20) is formed with a receiving recess (30) for receiving the thermistor (50). The insulator (20) has wall surfaces (35, 36) defining the receiving recess (30). The wall surfaces (35, 36) have a recess (37) into which a part of the thermistor (50) enters. The temperature detection device according to claim 1 or claim 2.

Images