Temperature sensor, power distribution component including the same, and electric machine including the power distribution component

Abstract

The present invention provides a temperature sensor, a power distribution component including the same, and an electric machine including the power distribution component, with small unevenness in sensitivity and thermal response. The temperature sensor (1A) is a temperature sensor that detects the temperatures of at least two power lines, and includes a temperature detection unit (10) and a protection component (20) that covers the temperature detection unit (10). A first contact surface (23) having a concave shape corresponding to the outer shape of the first power line and contacting the first power line, and a second contact surface (24) having a concave shape corresponding to the outer shape of the second power line and contacting the second power line are provided on the protection component (20).

Description

Technical Field

[0001] One aspect of the present invention relates to a temperature sensor, and more particularly, to a temperature sensor suitable for measuring the temperature of a power distribution line of a power distribution component. Another aspect of the present invention relates to a motor including a power distribution component. Background Art

[0002] Patent Document 1 describes a temperature sensor fixed to the surface of an insulating coating of an output wire of a rotating electrical machine using a sealing material such as a resin or a heat shrink tube.

[0003] Patent Document 2 describes a temperature sensor comprising a coil element, a thermosensitive body, and a housing for housing the coil element and the thermosensitive body. The coil element included in the temperature sensor described in Patent Document 2 is electrically connected to the stator coil of a rotating electrical machine, constituting a portion of the stator coil. Furthermore, the thermosensitive body included in the temperature sensor described in Patent Document 2 detects the temperature of the stator coil by detecting the temperature of the coil element, which constitutes a portion of the stator coil.

[0004] Prior art literature

[0005] Patent Document 1: International Publication No. 2018 / 131408

[0006] Patent Document 2: Japanese Patent No. 6282791

[0007] The temperature sensor described in Patent Document 1 may have variations in sensitivity and thermal response due to differences in the mounting position of the temperature sensor relative to the measurement object and the amount of sealing material sprayed to secure the temperature sensor to the measurement object.

[0008] Furthermore, the temperature sensor described in Patent Document 2 may have variations in sensitivity and thermal response due to positional deviations when the coil element and the heat-sensitive body are mounted on the housing. Summary of the invention

[0009] One object of the present invention is to provide a temperature sensor with small variations in sensitivity and thermal response and a power distribution component including the same. Another object of the present invention is to provide a motor including a power distribution component including a temperature sensor with small variations in sensitivity and thermal response.

[0010] The temperature sensor of the present invention is a temperature sensor that detects the temperatures of at least two power distribution lines, and includes a temperature detection unit and a protection component that covers the temperature detection unit. Moreover, on the protection component, a first contact surface having a concave shape corresponding to the outer shape of the first power distribution line and contacting the first power distribution line, and a second contact surface having a concave shape corresponding to the outer shape of the second power distribution line and contacting the second power distribution line are provided.

[0011] In one aspect of the present invention, the first contact surface is provided on the first surface of the protection component, and the second contact surface is provided on the second surface of the protection component on the side opposite to the first surface.

[0012] In another aspect of the present invention, when a hypothetical straight line that bisects the first contact surface and the second contact surface in the width direction in the cross-section of the protection component is used as a reference line, in the cross-section of the protection component, the temperature detection unit is arranged at a position deviated to the right or left of the reference line.

[0013] In another aspect of the present invention, the temperature sensor has a lead for obtaining a signal from the temperature detection unit, a part of the lead is covered by the protection component, and the other part is led out to the outside of the protection component. Moreover, the lead-out direction of the lead with respect to the protection component is the same direction as the long side direction of the first contact surface and the second contact surface.

[0014] In another aspect of the present invention, the temperature sensor has a lead for obtaining a signal from the temperature detection unit, a part of the lead is covered by the protection component, and the other part is led out to the outside of the protection component. Moreover, the lead-out direction of the lead with respect to the protection component is a different direction from the long side direction of the first contact surface and the second contact surface.

[0015] In another aspect of the present invention, the protection component is composed of a first protection component in which the temperature detection unit is embedded and a second protection component that covers the first protection component.

[0016] The power distribution component of the present invention includes two or more power distribution lines and a temperature sensor that detects the temperatures of these power distribution lines. The temperature sensor has a temperature detection unit and a protection component that covers the temperature detection unit. Moreover, on the protection component, a first contact surface having a concave shape corresponding to the outer shape of the first power distribution line and contacting the first power distribution line, and a second contact surface having a concave shape corresponding to the outer shape of the second power distribution line and contacting the second power distribution line are provided.

[0017] In one aspect of the present invention, the power distribution line connects the coil of the motor and the terminal block and supplies power to the coil.

[0018] In another aspect of the present invention, among the above two or more power distribution lines, there are two power distribution lines forming a first wire pair connected to the U-phase coil of a three-phase motor, two other power distribution lines forming a second wire pair connected to the V-phase coil of the above three-phase motor, and two additional power distribution lines forming a third wire pair connected to the W-phase coil of the above three-phase motor.

[0019] The motor of the present invention is equipped with the above-described power distribution component of the present invention.

[0020] Advantages of the Invention

[0021] According to the present invention, a temperature sensor with a small interval between sensitivity and thermal response and a power distribution component including the same can be realized. Additionally, according to the present invention, a motor equipped with a power distribution component including a temperature sensor with a small interval between thermal sensitivity and thermal response can be realized. Description of the Drawings

[0022] Figure 1 It is a perspective view showing an example of the temperature sensor to which the present invention is applied.

[0023] Figure 2 It shows Figure 1 An explanatory diagram showing the structure of the temperature detection part shown.

[0024] Figure 3 It shows Figure 1 A perspective view showing the usage state of the temperature sensor shown.

[0025] Figure 4 It is Figure 1 A cross-sectional view of the protection component shown.

[0026] Figure 5 It is a perspective view showing another example of the temperature sensor to which the present invention is applied.

[0027] Figure 6 It is a perspective view showing an example of the power distribution component to which the present invention is applied.

[0028] Figure 7 It is a conceptual diagram schematically showing the connection ends of the respective power distribution lines.

[0029] In the figure: 1A, 1B - temperature sensors; 2 - power distribution component; 10 - temperature detection section; 11 - temperature detection element; 12a - element electrode (upper element electrode); 12b - element electrode (lower element electrode); 13a - electrode wire (upper electrode wire); 13b - electrode wire (lower electrode wire); 20 - protection component; 20a - upper surface; 20b - lower surface; 21 - gap; 22 - sealing material; 23 - first contact surface; 24 - second contact surface; 30a, 30b - leads; 31 - wire core; 32 - covering; 40, 61, 62, 71, 72, 81, 82 - power distribution wires; 41 - first power distribution wire; 42 - second power distribution wire; 51 - first protection component; 52 - second protection component; 60 - first wire pair; 70 - second wire pair; 80 - third wire pair; 61a, 62a, 71a, 72a, 81a, 82a - connection ends; 91 - first fixing component; 92 - second fixing component; 93 - third fixing component; 100 - three-phase motor; 101 - U-phase coil; 102 - V-phase coil; 103 - W-phase coil; X - reference line. Detailed implementation mode

[0030] (First implementation mode)

[0031] Hereinafter, with reference to the drawings, an example of the temperature sensor to which the present invention is applied will be described in detail. The temperature sensor of the present embodiment is a temperature sensor for detecting the temperature of the power distribution wires constituting the power distribution component, and can detect the temperatures of at least two power distribution wires simultaneously.

[0032] As Figure 1 shown, the temperature sensor 1A of the present embodiment includes a temperature detection section 10, a protection component 20, and leads 30a, 30b. The temperature detection section 10 and the leads 30a, 30b are covered by the protection component 20. In other words, the protection component 20 is a molded component that encloses the temperature detection section 10 and the leads 30a, 30b.

[0033] Among them, the entire temperature sensor 10 is covered by the protection component 20, but a part of the leads 30a, 30b is covered by the protection component 20. Specifically, a part of the long side direction of the leads 30a, 30b is covered by the protection component 20. On the other hand, the remaining parts of the leads 30a, 30b are not covered by the protection component 20 and are led out of the protection component 20. In the following description, there are cases where a part of the leads 30a, 30b covered by the protection component 20 is referred to as a "buried part", and the other part of the leads 30a, 30b not covered by the protection component 20 is referred to as an "extracted part" for distinction.

[0034] As Figure 2As shown, the temperature detection unit 10 includes a temperature detection element 11 such as a thermistor or a platinum resistor. An element electrode 12a is provided on one surface of the temperature detection element 11, and an electrode wire 13a is welded to the element electrode 12a. In addition, an element electrode 12b is provided on the other surface of the temperature detection element 11, and an electrode wire 13b is welded to the element electrode 12b. In the following description, the element electrode 12a may be referred to as the "upper element electrode 12a", the electrode wire 13a may be referred to as the "upper electrode wire 13a", and the surface of the temperature detection element 11 where the upper element electrode 12a is provided may be referred to as the "upper surface". In addition, the element electrode 12b may be referred to as the "lower element electrode 12b", the electrode wire 13b may be referred to as the "lower electrode wire 13b", and the other surface of the temperature detection element 11 where the lower element electrode 12b is provided may be referred to as the "lower surface".

[0035] That is, the upper element electrode 12a is provided on the upper surface of the temperature detection element 11, and the upper element electrode 12a is connected to the lead 30a through the upper electrode wire 13a. In addition, the lower element electrode 12b is provided on the lower surface of the temperature detection element 11, and the lower element electrode 12b is connected to the lead 30b through the lower electrode wire 13b.

[0036] Here, the leads 30a and 30b electrically connected to the temperature detection element 11 are leads with a sheath, which include a wire core 31 and a sheath 32 provided around the wire core 31. And the front end of the exposed wire core 31 of the lead 30a is welded to the end of the upper electrode wire 13a, and the front end of the exposed wire core 31 of the lead 30b is welded to the end of the lower electrode wire 13b. Moreover, the exposed portions of the wire cores 31 of the temperature detection element 11, the electrode wires 13a and 13b including the joints (welding points) with the temperature detection element 11, and the leads 30a and 30b including the joints (welding points) with the electrode wires 13a and 13b are all coated with a resin such as epoxy resin or glass.

[0037] Moreover, the wire cores 31 of the leads 30a and 30b are stranded wires respectively composed of multiple soft copper wires electroplated with tin, nickel, etc. In addition, the sheath 32 of the leads 30a and 30b is preferably formed using a fluororesin with excellent heat resistance (for example, polytetrafluoroethylene (PTFE), soluble polytetrafluoroethylene (PFA), fluorinated ethylene propylene copolymer (FEP)).

[0038] Refer again to Figure 1 . A part (buried part) of the temperature detection unit 10 and the leads 30a and 30b having the above structure is disposed in the gap 21 provided in the protection member 20. And a sealing material 22 is filled in the gap 21 of the protection member 20 ( Figure 4), the temperature detection unit 10 and the buried portions of the lead wires 30a and 30b are fixed within the gap 21 by the sealing material 22. Moreover, the sealing material 22 ( Figure 4 ) in the present embodiment is epoxy resin, but the material of the sealing material 22 is not limited to epoxy resin.

[0039] Figure 1 The protective member 20 shown is a resin molded body formed by injecting molten resin into a mold. The resin that becomes the material of the protective material 20 is preferably a material with excellent heat resistance and oil resistance. For example, engineering plastics and super engineering plastics such as polyphenylene sulfide (PPS), polyimide (PI), polytetrafluoroethylene (PTFE), and polyamide-imide (PAI) are preferred. PPS, which has excellent heat resistance and rigidity among these resin materials and also has high fluidity during manufacturing, is particularly preferably used as the material of the protective member 20.

[0040] As Figure 3 , Figure 4 shown, a first contact surface 23 is provided on the first surface (upper surface 20a) of the protective member 20, and a second contact surface 24 is provided on the second surface (lower surface 20b) of the protective member 20 opposite to the first surface. The first contact surface 23 and the second contact surface 24 have a concave shape corresponding to the outer shape of the power distribution line 40 and extend along the long side direction of the protective member 20.

[0041] As Figure 4 shown, the first contact surface 23 contacts one of the two power distribution lines 40 (the first power distribution line 41), and the second contact surface 24 contacts the other of the two power distribution lines 40 (the second power distribution line 42). More specifically, the power distribution line 40 is a wire with a circular outer shape, and the first contact surface 23 and the second contact surface 24 are concave surfaces that mimic the outer shape of the power distribution line 40. And, the first contact surface 23 is in partial surface contact with the outer peripheral surface of the first power distribution line 41, and the second contact surface 24 is in partial surface contact with the outer peripheral surface of the second power distribution line 42. That is, the first contact surface 23 and the second contact surface 24 are curved surfaces having the same or substantially the same curvature as the outer peripheral surface of the power distribution line 40.

[0042] In other words, depressions for embedding the power distribution line 40 are provided on the upper surface 20a and the lower surface 20b of the protective member 20. And, when the power distribution line 40 is embedded in the depression, the entire area of the surface of the depression contacts the surface of the power distribution line 40.

[0043] Moreover, as Figure 3 shown, the lead-out directions of the lead wires 30a and 30b with respect to the protective member 20 are in the same direction as the long side direction of the first contact surface 23 and the second contact surface 24.

[0044] As Figure 4As shown, the gap 21 in which the temperature detection unit 10 is buried is provided between the first contact surface 23 and the second contact surface 24 in the thickness direction of the protection member 20 ( Figure 4 the up-and-down direction of the paper surface of). Therefore, if the first power distribution line 41 contacts the first contact surface 23 and the second power distribution line 42 contacts the second contact surface 24, the temperature detection unit 10 is located between the first power distribution line 41 and the second power distribution line 42 in the thickness direction of the protection member 20. That is, the temperature detection unit 10 is clamped by the first power distribution line 41 and the second power distribution line 42.

[0045] Here, the power distribution line 40 is a constituent element of a power distribution component that supplies power to electrical equipment such as a motor, and functions as a power supply line that supplies power to the electrical equipment. If power is supplied to the electrical equipment through the power distribution line 40, the power distribution line 40 generates heat due to the conductor resistance. Moreover, the temperature rise caused by the heat generation of the power distribution line 40 is detected (measured) by the temperature detection unit 10 buried in the protection member 20, and signals representing the detection results (measurement results) are obtained through the lead wires 30a and 30b. For example, when the temperature detection element 11 ( Figure 2 ) provided in the temperature detection unit 10 is a thermistor, a resistance value corresponding to the thermistor temperature is obtained as a signal representing the detection result. Furthermore, the signals obtained from the temperature detection unit 10 are input to a detection unit (not shown) through the lead wires 30a and 30b. At this time, there may also be a case where an intermediate connection part is provided through other connection components such as a connector in the signal transmission path to the detection unit.

[0046] As described above, the temperature sensor 1A of the present embodiment has a protection member 20 in which the temperature detection unit 10 is buried, and a first contact surface 23 and a second contact surface 24 with which two power distribution lines 40 are respectively in contact are provided on the protection member 20. Moreover, the first contact surface 23 and the second contact surface 24 provided on the protection member 20 have a concave shape corresponding to the outer shape of the power distribution line 40. Therefore, the temperature sensor 1A of the present embodiment can be installed on the two power distribution lines 40 only by sandwiching the protection member 20 between the two power distribution lines 40. In addition, by moving (sliding) the protection member 20 sandwiched between the two power distribution lines 40 along the power distribution lines 40, the position of the temperature sensor 1A can also be adjusted. In short, the temperature sensor 1A of the present embodiment is easy to position and assemble with respect to the power distribution line 40 as the measurement object.

[0047] In addition, since the first abutting surface 23 and the second abutting surface 24 provided on the protection member 20 have concave shapes corresponding to the outer shapes of the respective power distribution lines 40, the protection member 20 is in close contact (surface contact) with the power distribution lines 40, and heat is efficiently transferred from the power distribution lines 40 to the protection member 20. Moreover, since the temperature detection unit 10 embedded in the protection member 20 is disposed between the first abutting surface 23 and the second abutting surface 24, heat can also be efficiently and uniformly transferred from the protection member 20 to the temperature detection unit 10. As a result, the temperature sensor 1A according to the present embodiment can measure the temperatures of the two power distribution lines 40 simultaneously and with high precision.

[0048] On the other hand, there is a possibility that the temperature detection unit 10 sandwiched between the two power distribution lines 40 (the first power distribution line 41 and the second power distribution line 42) is affected by stress and vibration caused by the displacement of the first power distribution line 41 and the second power distribution line 42. Moreover, the solder joints of the temperature detection element 11 with the electrode lines 13a and 13b and the solder joints of the electrode lines 13a and 13b with the wire cores 31 of the lead wires 30a and 30b are brittle with respect to stress and vibration. In addition, when the covering member covering the temperature detection element 11, the electrode lines 13a and 13b, etc. is formed of glass, there is a possibility that the covering member is damaged due to stress and vibration.

[0049] Therefore, as Figure 4 shown, when the first power distribution line 41 is in contact with the first abutting surface 23 and the second power distribution line 42 is in contact with the second abutting surface 24, the positional relationship between the first abutting surface 23 and the second abutting surface 24 and the temperature detection unit 10 is set such that the temperature detection unit 10 is disposed at a position deviated from directly below the first power distribution line 41 and in the positive direction of the second power distribution line 42.

[0050] Specifically, when a virtual straight line that divides the first abutting surface 23 and the second abutting surface 24 into two in the width direction ( Figure 4 the left-right direction of the paper surface in the cross section of the protection member 20) is used as the reference line X, the temperature detection unit 10 is disposed at a position deviated to one side (right side or left side) of the reference line X in the cross section of the protection member 20. In other words, the temperature detection unit 10 is disposed at a position deviated from the reference line X by a predetermined distance in the width direction of the protection member 20 in the cross section of the protection member 20.

[0051] In the temperature sensor 1A of the present embodiment, since the positional relationship between the first abutting surface 23 and the second abutting surface 24 and the temperature detection unit 10 is set as described above, the influence on the temperature detection unit 10 due to stress and vibration generated by the displacement of the first power distribution line 41 and the second power distribution line 42 can be alleviated, and the reliability as a temperature sensor can be improved.

[0052] (Second Embodiment)

[0053] Hereinafter, other examples of the temperature sensor to which the present invention is applied will be described in detail with reference to the accompanying drawings. Among them, the temperature sensor of the present embodiment has the same basic structure as the temperature sensor 1A of the first embodiment ( Figure 1 ), and is a temperature sensor used for the same purpose. Therefore, the description of the structure that is the same as or substantially the same as the structure already described will be appropriately omitted. In addition, the same reference numerals are used for the structure that is the same as or substantially the same as the structure already described.

[0054] As Figure 5 shown, the protection member 20 included in the temperature sensor 1B of the present embodiment is composed of a first protection member 51 and a second protection member 52. The first protection member 51, which is one of the components of the protection member 20 in the present embodiment, has substantially the same shape and structure as the protection member 20 in the first embodiment. In the first protection member 51, a temperature detection unit is buried, which is the same as the Figure 1 , Figure 2 shown temperature detection unit 10.

[0055] In addition, the second protection member 52, which is one of the components of the protection member 20 in the present embodiment, covers the first protection member 51. As a result, in the present embodiment, a part of the surface of the second protection member 52 is a first contact surface 23 that contacts the first power distribution line 41, and another part of the surface of the second protection member 52 is a second contact surface 24 that contacts the second power distribution line 42.

[0056] However, the temperature sensor 1B of the present embodiment has a concave shape corresponding to the outer shape of the power distribution line 40, and is common with the temperature sensor 1A of the first embodiment in that the protection member 20 having the first contact surface 23 and the second contact surface 24 that contact the surface of the power distribution line 40 is provided, that is, the temperature sensor 1A of the first embodiment and the temperature sensor 1B of the present embodiment are common in that the protection member 20 that encloses the temperature detection unit 10 and the power distribution line 40 have a surface contact structure.

[0057] On the other hand, the temperature sensor 1B of the present embodiment is different from the temperature sensor 1A of the first embodiment in the lead-out direction of the leads 30a and 30b with respect to the protection member 20. Specifically, in the temperature sensor 1A of the first embodiment, the lead-out direction of the leads 30a and 30b with respect to the protection member 20 is the same direction as the long side direction of the first contact surface 23 and the second contact surface 24. In contrast, in the temperature sensor 1B of the present embodiment, the lead-out direction of the leads 30a and 30b with respect to the protection member 20 is a different direction from the long side direction of the first contact surface and the second contact surface. Specifically, as Figure 5As shown, the lead wires 30a and 30b are led out from the protective member 20 in a direction (arrow B direction) orthogonal to the long side direction (arrow A direction) of the first abutting surface 23 and the second abutting surface 24.

[0058] However, the lead wires 30a and 30b are led out from the first protective member 51 in the same direction as the long side direction (arrow A direction) of the first abutting surface 23 and the second abutting surface 24. That is, the lead wires 30a and 30b led out from the first protective member 51 in the arrow A direction are bent approximately 90 degrees inside the second protective member 52 and led out from the second protective member 52 in the arrow B direction. In other words, a part of the second protective member 52 holds the bent state of the lead wires 30a and 30b and also serves as a lead guiding portion that restricts the lead-out direction of the lead wires 30a and 30b with respect to the protective member 20.

[0059] Moreover, the difference in the lead-out direction of the lead wires 30a and 30b between the temperature sensor 1A of the first embodiment and the temperature sensor 1B of the present embodiment is caused by the difference in the predetermined wiring paths of the lead wires 30a and 30b.

[0060] (Third Embodiment)

[0061] Hereinafter, an example of a power distribution component to which the present invention is applied will be described in detail with reference to the drawings. The power distribution component of the present embodiment includes two or more power lines that connect the coil of the motor to the terminal block and supply power to the coil, and a temperature sensor that is disposed between the two power lines and detects the temperature of these power lines. Moreover, the temperature sensor included in the power distribution component of the present embodiment is the temperature sensor 1B described as the second embodiment of the present invention ( Figure 5 ).

[0062] As Figure 6 shown, the power distribution component 2 of the present embodiment includes a pair of power lines 61 and 62, another pair of power lines 71 and 72, and still another pair of power lines 81 and 82. That is, the power distribution component 2 of the present embodiment includes a total of three pairs (six) of power lines. In the following description, there will be cases where a pair of power lines 61 and 62 are referred to as "first wire pair 60", another pair of power lines 71 and 72 are referred to as "second wire pair 70", and still another pair of power lines 81 and 82 are referred to as "third wire pair 80". Moreover, each of the power lines 61, 62, 71, 72, 81, and 82 is an insulated wire with enameled coating around the lead wire and has a circular outer shape.

[0063] The power distribution component 2 includes a first fixing component 91 that integrally fixes the first wire pair 60, the second wire pair 70, and the third wire pair 80, and a second fixing component 92 that integrally fixes the first wire pair 60 and the second wire pair 70. Moreover, the power distribution component 2 includes a third fixing component 93 that integrally fixes the power distribution wires 81 and 82 that constitute the third wire pair 80.

[0064] One end of each of the power distribution wires 61, 62, 71, 72, 81, 82 included in the power distribution component 2 is connected to a predetermined coil of a three-phase motor. Specifically, as Figure 7 shown, one end of the power distribution wires 61, 62 is connected to the U-phase coil 101 of the three-phase motor 100, one end of the power distribution wires 71, 72 is connected to the V-phase coil 102 of the three-phase motor 100, and one end of the power distribution wires 81, 82 is connected to the W-phase coil 103 of the three-phase motor 100. Moreover, Figure 7 This is not a diagram showing the actual connection state, but a conceptual diagram schematically showing the connection ends of the respective power distribution wires 61, 62, 71, 72, 81, 82.

[0065] Refer to again Figure 6 . Connection ends for connecting to a connection object are provided at the ends of each of the power distribution wires 61, 62, 71, 72, 81, 82. Specifically, connection ends 61a, 62a for connecting to the U-phase coil 101 of the three-phase motor 100 ( Figure 7 ) are provided at one end of the power distribution wires 61, 62, and connection ends (not shown) for connecting to predetermined terminals of a terminal block are provided at the other end of the power distribution wires 61, 62. Connection ends 71a, 72a for connecting to the V-phase coil 102 of the three-phase motor 100 ( Figure 7 ) are provided at one end of the power distribution wires 71, 72, and connection ends (not shown) for connecting to predetermined terminals of a terminal block are provided at the other end of the power distribution wires 71, 72. In addition, connection ends 81a, 82a for connecting to the W-phase coil 103 of the three-phase motor 100 ( Figure 7 ) are provided at one end of the power distribution wires 81, 82, and connection ends (not shown) for connecting to predetermined terminals of a terminal block are provided at the other end of the power distribution wires 81, 82.

[0066] In this embodiment, a temperature sensor 1B is provided on the first wire pair 60. Specifically, the protection component 20 of the temperature sensor 1B is disposed between the two power distribution wires 61, 62 that constitute the first wire pair 60. That is, Figure 6 the power distribution wires 61, 62 shown are equivalent to Figure 5 the power distribution wires 41, 42 shown.

[0067] Among them, when the temperature sensor 1B is provided on the first wire pair 60, its position and quantity are not limited to the positions and quantities shown in the figure. For example, the temperature sensor 1B can be arranged in the area between the first fixing member 91 and the second fixing member 92. In addition, the temperature sensor 1B can be respectively arranged at two or more different positions on the first wire pair 60. Of course, the temperature sensor 1B can be provided on the second wire pair 70 and the third wire pair 80. In addition, the temperature sensor 1B can be arranged between two wire pairs. For example, the temperature sensor 1B can be arranged between the distribution wire 61 or 62 included in the first wire pair 60 and the distribution wire 81 or 82 included in the third wire pair 80.

[0068] Figure 6 The shown temperature sensor 1B can also be replaced with Figure 1 the shown temperature sensor 1A. Moreover, the temperature sensor 1A ( Figure 1 ) and the temperature sensor 1B ( Figure 5 ) can also be used simultaneously.

[0069] The present invention is not limited to the above embodiments, and various changes can be made without departing from its gist. For example, the first abutting surface 23 and the second abutting surface 24 in the above embodiments are concave surfaces (curved surfaces). However, the first abutting surface 23 and the second abutting surface 24 can be changed to other concave shapes according to the outer shape of the distribution wire 40. For example, when the outer shape of the distribution wire 40 is a flat angle shape, the first abutting surface 23 and the second abutting surface 24 can be changed to concave shapes corresponding to the outer shape (flat angle shape) of the distribution wire 40.

[0070] The gap 21 provided in the protection member 20 only needs to have the shape and size required for accommodating the temperature detection part 10 and other necessary components. That is, the shape and size of the gap 21 are not limited to the shapes and sizes shown in the figure. For example, Figure 4 the shown gap 21 can omit the part on the right side of the reference line X in the figure compared to the reference line on the left and right.

[0071] Among them, a resin material can be injected into the mold for arranging the temperature detection part 10 and other necessary components to form the protection member 20 embedded with the temperature detection part 10 and the like. In this case, the Figure 4 shown gap 21 and the sealing material 22 are not required.

[0072] The cores 31 of the leads 30a and 30b can be changed to stranded wires with leads other than soft copper wires as bare wires. In addition, the insulating paint films of the distribution wires 61, 62, 71, 72, 81, and 82 can be formed by insulating materials other than enamel.

[0073] In this specification, as an example of the power distribution component of the present invention, a power distribution component that connects the coil of an electric motor to a terminal block is cited. As an example of an electric motor to which the power distribution component of the present invention is assembled and applied, an electric motor used as a drive source for vehicles such as automobiles can be cited. However, the power distribution component of the present invention is not limited to the power distribution component that connects the coil of an electric motor to a terminal block.

Claims

1. A temperature sensor that detects the temperature of at least two power distribution lines, characterized in that it includes: a temperature detection unit; and a protection component that covers the temperature detection unit, on the protection component, there are provided a first contact surface having a concave shape corresponding to the outer shape of the first power distribution line and in contact with the first power distribution line, and a second contact surface having a concave shape corresponding to the outer shape of the second power distribution line and in contact with the second power distribution line, the first contact surface is provided on the first surface of the protection component, the second contact surface is provided on the second surface of the protection component opposite to the first surface, when in the cross-section of the protection component, taking the imaginary straight line that bisects the first contact surface and the second contact surface in the width direction as the reference line, the temperature detection unit is arranged at a position deviated to the right or left of the reference line in the cross-section of the protection component.

2. A temperature sensor that detects the temperature of at least two power distribution lines, characterized in that it includes: a temperature detection unit; and a protection component that covers the temperature detection unit, on the protection component, there are provided a first contact surface having a concave shape corresponding to the outer shape of the first power distribution line and in contact with the first power distribution line, and a second contact surface having a concave shape corresponding to the outer shape of the second power distribution line and in contact with the second power distribution line, the temperature sensor further has a lead wire for obtaining a signal from the temperature detection unit, a part of which is covered by the protection component and the other part is led out of the protection component, the lead-out direction of the lead wire with respect to the protection component is the same as the long side direction of the first contact surface and the second contact surface.

3. A temperature sensor that detects the temperature of at least two power distribution lines, characterized in that it includes: a temperature detection unit; and a protection component that covers the temperature detection unit, on the protection component, there are provided a first contact surface having a concave shape corresponding to the outer shape of the first power distribution line and in contact with the first power distribution line, and a second contact surface having a concave shape corresponding to the outer shape of the second power distribution line and in contact with the second power distribution line, the temperature sensor further has a lead wire for obtaining a signal from the temperature detection unit, a part of which is covered by the protection component and the other part is led out of the protection component, the lead-out direction of the lead wire with respect to the protection component is different from the long side direction of the first contact surface and the second contact surface.

4. The temperature sensor according to any one of claims 1 to 3, characterized in that the protection component is composed of a first protection component in which the temperature detection unit is embedded and a second protection component that covers the first protection component.

5. A power distribution component that includes two or more power distribution lines and the temperature sensor according to any one of claims 1 to 4 for detecting the temperature of these power distribution lines, characterized in that the temperature sensor includes: a temperature detection unit; a protection component that covers the temperature detection unit, The protection component is provided with a first abutting surface having a concave shape corresponding to the outer shape of the first power distribution wire and contacting the first power distribution wire, and a second abutting surface having a concave shape corresponding to the outer shape of the second power distribution wire and contacting the second power distribution wire.

6. The power distribution component according to claim 5, wherein: The two or more power distribution wires connect the coil of the motor and the terminal block, and supply power to the coil.

7. The power distribution component according to claim 6, wherein: Among the two or more power distribution wires, there are two power distribution wires forming a first wire pair connected to the U-phase coil of the three-phase motor, two other power distribution wires forming a second wire pair connected to the V-phase coil of the three-phase motor, and two other power distribution wires forming a third wire pair connected to the W-phase coil of the three-phase motor.

8. A motor, wherein: It includes the power distribution component according to claim 5.

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