Wiring parts

Abstract

To provide a wiring component with a temperature sensor capable of detecting a temperature of a rotary electric machine with higher precision.SOLUTION: A wiring component 1, connecting a coil end 112a of a stator 11 in a rotary electric machine 10 and an electrode 12a of a terminal block 12 of the rotary electric machine 10, includes: a plurality of conductors 2 whose one end is connected with the coil end 112a of the stator 11 and the other end is connected with the electrode 12a of the terminal block 12; a temperature sensor 6 for detecting a temperature of the rotary electric machine 10; and a fixing member 7 for fixing the temperature sensor 6 on at least one of the plurality of conductors 2. The temperature sensor 6 has a temperature detection element for detecting temperatures and a package covering the periphery of the temperature detection element. In the temperature sensor 6, at least a part of the package is provided to face a stator core 111 of the stator 11 in the axial direction of the stator 11.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a wiring component with a temperature sensor that is integrally provided with a temperature sensor for detecting the temperature of a rotating electrical machine. [Background technology]

[0002] 2. Description of the Related Art Conventionally, wiring components are known that connect coil ends of a stator in a rotating electric machine such as a motor or a generator to electrodes of a terminal block of the rotating electric machine (see, for example, Patent Document 1).

[0003] The wiring component described in Patent Document 1 is integrally provided with a temperature sensor that detects the temperature of the rotating electric machine in order to prevent damage due to overheating of the rotating electric machine. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2021-67584 Summary of the Invention [Problem to be solved by the invention]

[0005] Incidentally, in the wiring component described in Patent Document 1, the temperature of the conductive wire (power wire) connecting the coil end of the stator and the electrode of the terminal block is measured by a temperature sensor, and the temperature of the rotating electric machine is indirectly measured. In order to more reliably prevent damage to the rotating electric machine due to overheating, it is desired to detect the temperature of the rotating electric machine with higher accuracy.

[0006] SUMMARY OF THE PRESENT DISCLOSURE In view of the above, an object of the present invention is to provide a wiring component with a temperature sensor capable of detecting the temperature of a rotating electrical machine with higher accuracy. [Means for solving the problem]

[0007] In order to solve the above-mentioned problems, the present invention provides a wiring component that connects a coil end of a stator in a rotating electric machine to an electrode of a terminal block of the rotating electric machine, the wiring component comprising: a plurality of conductive wires, one end of which is connected to the coil end of the stator and the other end of which is connected to the electrode of the terminal block; a temperature sensor for detecting the temperature of the rotating electric machine; and a fixing member for fixing the temperature sensor to at least one of the plurality of conductive wires, the temperature sensor having a temperature detection element that detects temperature and a package that covers the periphery of the detection portion, and the temperature sensor is arranged so that at least a portion of the package faces a stator core of the stator in the axial direction of the stator. Effect of the Invention

[0008] According to the present invention, it is possible to provide a wiring component with a temperature sensor capable of detecting the temperature of a rotating electrical machine with higher accuracy. [Brief description of the drawings]

[0009] [Figure 1] 1 is a side view of a wiring component according to an embodiment of the present invention attached to a motor. [Diagram 2] 1 is a perspective view of a wiring component according to an embodiment of the present invention attached to a motor; [Diagram 3] 1A and 1B are diagrams showing a wiring component according to an embodiment of the present invention, in which FIG. 1A is a perspective view and FIG. 1B is an enlarged perspective view of a fixing portion of a temperature sensor. [Figure 4] FIG. 2A is a plan view of the temperature sensor, and FIG. 2B is a perspective view showing the temperature sensor and a lead wire cover. [Diagram 5] FIG. 13 is a perspective view showing a modified example of the fixing position of the temperature sensor. [Figure 6] FIG. 2(a) is a diagram showing the positional relationship between a temperature sensor, a fixing member, and a stator core in one embodiment of the present invention, and FIG. 2(b) is a modified example thereof. [Figure 7] 13(a) and 13(b) are diagrams showing the positional relationship between a temperature sensor, a fixing member, and a stator core in one modified example of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] [Embodiment Mode] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

[0011] Fig. 1 is a side view of the wiring component according to the present embodiment when attached to a motor, and Fig. 2 is a perspective view thereof. Fig. 3 is a diagram showing the wiring component according to the present embodiment, where (a) is a perspective view and (b) is an enlarged perspective view of a fixing portion of a temperature sensor.

[0012] 1 to 3, the wiring component 1 is for connecting a coil end 112a of a stator 11 in a motor 10 serving as a rotating electric machine to an electrode 12a of a terminal block 12 of the motor 10. The stator 11 has a cylindrical stator core 111 made of a soft magnetic metal and a stator coil (stator winding) 112 made of a plurality of coil pieces, and the coil end 112a of the stator coil 112 is electrically connected to the electrode 12a of the terminal block 12 via the wiring component 1. Although not shown, a rotor is disposed within the stator 11. The motor 10 is, for example, a three-phase AC motor used as a drive source for running a vehicle.

[0013] In the following description, the direction along the central axis of stator 11, i.e., the direction along the rotation axis of the rotor disposed within stator 11, is referred to as the axial direction. For convenience of explanation, the side on both axial sides of stator core 111 on which wiring components 1 are disposed is referred to as the upper side, and the opposite side is referred to as the lower side. However, the upper side and the lower side do not specify the top and bottom in the vertical direction when mounted on a vehicle.

[0014] The wiring component 1 includes a plurality of conductive wires 2, one end of which is connected to the coil end 112a of the stator 11, and the other end of which is connected to the electrode 12a of the terminal block 12. In the present embodiment, three conductive wires 21 to 23 corresponding to the U phase, V phase, and W phase are provided. However, the number of conductive wires 2 is not limited to this, and for example, two conductive wires 2 may be provided for each of the U phase, V phase, and W phase.

[0015] A so-called bus ring, in which conductive wires are formed in a ring shape, is known as a wiring component for a motor, but the wiring component 1 according to the present embodiment is different from a bus ring in that the conductive wires 2 are not formed in a ring shape, and is a non-ring-shaped wiring material. Each conductive wire 2 has a high rigidity sufficient to enable it to maintain its own shape. Each conductive wire 2 has a circular cross section perpendicular to its longitudinal direction.

[0016] Each conductive wire 2 has a conductor made of a conductive metal such as copper or a copper alloy, and an electrically insulating coating layer such as an enamel coating that covers the surface of the conductor. The conductor of each conductive wire 2 is a solid wire (a single metal conductor that is not a twisted wire), and in this embodiment, a round solid wire with a circular cross section is bent and formed into a predetermined shape by pressing. However, the conductor may also be formed from a flat solid wire with a rectangular cross section.

[0017] A terminal 3 is provided at the end of each conductive wire 2 on the terminal block 12 side. Terminal 3 integrally includes a plate portion 31 connected to electrode 12a of terminal block 12 and a crimping portion 32 to which the end of conductive wire 2 is crimped. A bolt hole 31a penetrating plate portion 31 is formed in plate portion 31, and plate portion 31 is connected to electrode 12a of terminal block 12 by a bolt 12b inserted through bolt hole 31a.

[0018] At the end of each conductive wire 2 on the coil end 112a side (the end opposite the terminal 3), the coating layer is removed over a predetermined length to provide a connection portion 4 where the conductor is exposed. The connection portion 4 is welded to the corresponding coil end 112a by TIG (Tungsten Inert Gas) welding, which is a type of welding method that involves arc discharge using an inert gas. The surface of the connection portion 4 that faces the coil end 112a is made flat by pressing.

[0019] The three conductive wires 2 are collectively held by the holding portion 5. The holding portion 5 is configured to cover a part of each conductive wire 2 collectively and hold all the conductive wires 2 in a connected state. The holding portion 5 is made of, for example, PPS (polyphenylene sulfide). Note that, in the present embodiment, a case is shown in which one holding portion 5 is provided to collectively hold each conductive wire 2, but a plurality of holding portions 5 may be provided, and each holding portion 5 may be configured to hold only a part of the plurality of conductive wires 2. Furthermore, in the present embodiment, the holding portion 5 is made of molded resin, but the holding portion 5 may be configured to attach a separately molded part. Note that molded resin is a resin that is injection molded (molded).

[0020] (Temperature Sensor 6) The wiring component 1 includes a temperature sensor 6 for detecting the temperature of the motor 10 and a fixing member 7 for fixing the temperature sensor 6 to at least one of the plurality of conductive wires 2.

[0021] As shown in FIG. 4(a), the temperature sensor 6 has a temperature detection element 61 that detects temperature, and a package 62 that covers the temperature detection element 61. The temperature detection element 61 is composed of a thermistor that converts temperature into an electric signal. The package 62 is configured in a substantially rectangular box shape with one side open, and the temperature detection element 61 and ends of lead wires 63 extending from the temperature detection element 61 are inserted and housed in the package 62 through the opening 62a. The inside of the package 62 is filled with a filler material (not shown) made of, for example, epoxy resin. Note that the specific shape of the temperature sensor 6 is not limited to that shown in the figure.

[0022] In this embodiment, the fixing member 7 is made of molded resin provided so as to cover a part of the conductive wire 2 and at least a part of the temperature sensor 6. A lead wire cover 8 is provided so as to cover the periphery of the extending portion of the lead wire 63 in the package 62 so as to prevent the lead wire 63 from being broken due to the flow of resin when the fixing member 7 made of molded resin is formed.

[0023] As shown in FIG. 4(b), the lead wire cover 8 is provided so as to cover the end of the lead wire 63 in the package 62 on the extending side and a part of the lead wire 63 extending from the package 62. In this embodiment, the lead wire cover 8 is configured by a cover body part 81 having a groove 811 for accommodating a part of the package 62 and a part of the lead wire 63, and a cover lid part 82 fixed to the cover body part 81 so as to close the groove 811, but the specific shape and the like of the lead wire cover 8 are not limited to those shown in the drawings. In this embodiment, the cover lid part 82 is fixed to the cover body part 81 by fitting a protrusion 81a formed on the cover body part 81 into a hole 82a formed in the cover lid part 82. The groove 811 of the cover body part 81 has a package part 811a for accommodating the package 62, a lead wire accommodating part 811b for accommodating the lead wire 63, and a connecting part 811c for connecting the package part 811a and the lead wire accommodating part 811b in a tapered shape. By forming the connecting portion 811c in a tapered shape, the filler protruding from the opening 62a in the package 62 of the temperature sensor 6 to the outside of the package 62 can be prevented.

[0024] Fixing member 7 made of molded resin is formed so as to collectively cover a part of conductive wire 21, the entire package 62 of temperature sensor 6 exposed from lead wire cover 8, and a part of lead wire cover 8. Providing fixing member 7 fixes cover body 81 and cover lid 82 of lead wire cover 8. For example, if lead wire 63 is directly sandwiched by a mold when fixing member 7 is formed, lead wire 63 may be damaged. However, in this embodiment, a configuration in which lead wire cover 8 is sandwiched by a mold suppresses damage to lead wire 63 due to interference with the mold.

[0025] The fixing member 7 is made of, for example, PPS, like the holding part 5. The fixing member 7 and the holding part 5 can be formed simultaneously with a molded resin (by a single resin molding using the same mold). The melting point of the resin used for the fixing member 7 is set to be lower than the melting point of the resin used for the package 62 of the temperature sensor 6. As a result, the fixing member 7 and the package 62 are melted and integrated together by the heat generated when the fixing member 7 is molded with the resin. The fixing member 7 and the holding part 5 do not need to be separate, and may be configured as one piece. In this case, a part of the holding part 5 plays the role of the fixing member 7.

[0026] It is not essential that the fixing member 7 is made of molded resin, and for example, a separately formed part may be attached. In this case, the lead wire cover 8 can be omitted. The lead wire 63 of the temperature sensor 6 may be held by the holding portion 5. For example, the lead wire 63 may be held by a hook or the like formed on the holding portion 5, or may be held together with the conductive wire 2 by the molded resin. This prevents the lead wire 63 from sagging, improving the ease of handling and improving the workability of installing the wiring component 1. When the lead wire 63 is molded resin, it is preferable to provide a holder to cover the lead wire 63 and protect it.

[0027] In this embodiment, the temperature sensor 6 is fixed to the conductive wire 21 that has the longest length from the holding portion 5 to the connection portion 4. This makes it easy to fix the temperature sensor 6. Also, in this embodiment, the temperature sensor 6 is fixed to a straight portion of the conductive wire 21 that extends linearly, but as shown in FIG. 5, the temperature sensor 6 may be configured to be fixed to a bent portion of the conductive wire 21. This prevents the fixing member 7 and the temperature sensor 6 from moving in the longitudinal direction of the conductive wire 21 due to the influence of vibrations, etc.

[0028] In the wiring component 1 according to the present embodiment, the temperature sensor 6 is provided such that at least a portion of the package 62 faces the stator core 111 in the axial direction of the stator 11. In other words, the temperature sensor 6 is provided at a position overlapping the stator core 111 when the stator 11 is viewed in the axial direction. This allows the temperature sensor 6 to be provided closer to the stator core 111, making it possible to detect the temperature of the motor 10 (the temperature of the rotating electric machine) with greater accuracy. In order to detect the temperature of the motor 10 with greater accuracy, it is more preferable that the temperature sensor 6 is provided such that at least a portion of the temperature detection element 61 faces the stator core 111 in the axial direction of the stator 11.

[0029] In this embodiment, the temperature sensor 6 is provided such that at least a portion of the package 62 is located between the conductive wire 21 to which the temperature sensor 6 is fixed and the stator core 111. This allows the temperature sensor 6 to be provided closer to the stator core 111, making it possible to detect the temperature of the motor 10 with greater accuracy. However, this is not limiting, and the temperature sensor 6 may be provided between the conductive wire 21 to which the temperature sensor 6 is fixed and the stator coil 112.

[0030] When the temperature sensor 6 is provided between the conductive wire 21 and the stator core 111 as in this embodiment, the package 62 of the temperature sensor 6 is preferably provided parallel to the surface (axial end face) of the stator core 111. In addition, the distance from the surface of the stator core 111 to the package 62 of the temperature sensor 6 is preferably 5 mm or less.

[0031] As shown in FIG. 6(a), the fixing member 7 may be in contact with the stator core 111. This allows the temperature sensor 6 to directly detect the temperature of the stator core 111 via the fixing member 7, and the temperature of the motor 10 can be detected more accurately. In this case, however, there is a risk that the fixing member 7 may repeatedly collide with the stator core 111 due to vibration, resulting in damage or abnormal noise, so it is preferable to directly fix the fixing member 7 to the stator core 111 with a fixing member such as a bracket. The specific structure of the fixing member is not particularly limited, but for example, a member having a hook that engages the upper part of the fixing member 7 and fixed to the stator core 111 with a bolt or the like can be used.

[0032] Furthermore, as shown in FIG. 6(b), a buffer material 9 may be provided between the fixing member 7 and the stator core 111. In this case, the fixing member 7 comes into contact with the stator core 111 via the buffer material 9. For example, an elastic rubber material or a gel-like material can be used as the buffer material 9. By providing the buffer material 9, the temperature sensor 6 can be brought closer to the stator core 111, and the detection accuracy of the temperature of the motor 10 can be improved, while damage to the fixing member 7 and the temperature sensor 6 due to vibration can be further suppressed. In addition, by using a material with high thermal conductivity as the buffer material 9, the heat of the stator core 111 can be easily transferred to the temperature sensor 6, and the detection accuracy of the temperature of the motor 10 can be further improved.

[0033] In addition, in this embodiment, the case where the lead wire cover 8 is used has been described, but it is also possible to omit the lead wire cover 8 by forming the fixing member 7 so as to cover only a portion of the package 62, as shown in FIG. 7(a).

[0034] Furthermore, as shown in FIG. 7(b), the fixing member 7 may be formed so as to expose the surface of the package 62 facing the stator core 111. In this embodiment, the fixing member 7 and the package 62 are integrated, so that the package 62 will not fall off the fixing member 7. This makes it possible to bring the package 62 into direct contact with the stator core 111 (or into contact with the stator core 111 via the buffer material 9), making it possible to detect the temperature of the motor 10 with greater accuracy. In this way, the fixing member 7 only needs to be provided so as to cover a portion of the conductive wire 2 and at least a portion of the temperature sensor 6.

[0035] (Functions and Effects of the Embodiments) As described above, the wiring component 1 of this embodiment includes a temperature sensor 6 for detecting the temperature of the motor 10, which is a rotating electric machine, and a fixing member 7 for fixing the temperature sensor 6 to at least one of the multiple conductive wires 2. The temperature sensor 6 has a temperature detection element 61 for detecting temperature, and a package 62 for covering the temperature detection element 61. The temperature sensor 6 is arranged such that at least a portion of the package 62 faces the stator core 111 of the stator 11 in the axial direction of the stator 11.

[0036] With this configuration, it is possible to place the temperature sensor 6 closer to the stator 11, thereby improving the accuracy of detecting the temperature of the motor 10. Furthermore, by providing the temperature sensor 6 integrally with the wiring component 1, the process of attaching the temperature sensor 6 can be omitted, which facilitates the work during the manufacture of the motor 10 and reduces the processing costs.

[0037] (Summary of the embodiment) Next, the technical ideas grasped from the above-described embodiment will be described by using the reference numerals and the like in the embodiment. However, the reference numerals and the like in the following description do not limit the components in the claims to the members and the like specifically shown in the embodiment.

[0038] [1] A wiring component (1) for connecting a coil end (112a) of a stator (11) in a rotating electric machine to an electrode (12a) of a terminal block (12) of the rotating electric machine, the wiring component (1) comprising a plurality of conductive wires (2) each having one end connected to the coil end (112a) of the stator (11) and the other end connected to the electrode (12a) of the terminal block (12); a temperature sensor (6) for detecting the temperature of the rotating electric machine; and a temperature sensor (6) for connecting the temperature sensor (6) to the plurality of conductive wires. and a fixing member (7) fixed to at least one of the electric wires (2), wherein the temperature sensor (6) has a temperature detection element (61) that detects temperature and a package (62) that covers the temperature detection element (61), and the temperature sensor (6) is provided such that at least a portion of the package (62) faces a stator core (111) of the stator (11) in the axial direction of the stator (11).

[0039] [2] The wiring component (1) described in [1], wherein the temperature sensor (6) is arranged so that at least a portion of the package (62) is positioned between the conductive wire (2) to which the temperature sensor (6) is fixed and the stator core (111).

[0040] [3] The wiring component (1) according to [1] or [2], wherein the temperature sensor (6) is arranged so that at least a portion of the temperature detection element (61) faces the stator core (111) in the axial direction of the stator (11).

[0041] [4] The wiring component (1) according to any one of [1] to [3], wherein the fixing member (7) or the package (62) is in contact with the stator core (111).

[0042] [5] The wiring component (1) according to any one of [1] to [3], further comprising a buffer material (9) provided between the fixing member (7) or the package (62) and the stator core (111), and the fixing member (7) or the package (62) is in contact with the stator core (111) via the buffer material (9).

[0043] [6] The wiring component (1) described in any one of [1] to [4], wherein the fixing member (7) is made of a molded resin arranged to cover a portion of the conductive wire (2) and at least a portion of the temperature sensor (6).

[0044] Although the embodiment of the present invention has been described above, the invention according to the claims is not limited to the embodiment described above. It should be noted that not all of the combinations of features described in the embodiment are essential to the means for solving the problems of the invention. The present invention can be modified appropriately without departing from the spirit of the invention. [Explanation of symbols]

[0045] 1...Wiring parts 2...Conductive wire 6...Temperature sensor 61...Temperature detection element 62…Package 7…Fixing parts 8…Lead wire cover 9…Cushioning material 10...Motor (rotating electric machine) 11...Stator 111…Stator core 112…Stator coil 112a...Coil end 12...Terminal block 12a...electrode

Claims

1. A wiring component that connects a coil end of a stator in a rotating electric machine to an electrode of a terminal block of the rotating electric machine, a plurality of conductive wires, one end of which is connected to the coil end of the stator and the other end of which is connected to the electrodes of the terminal block; a temperature sensor for detecting a temperature of the rotating electric machine; a fixing member for fixing the temperature sensor to at least one of the plurality of conductive wires, The temperature sensor includes a temperature detection element that detects a temperature, and a package that covers the temperature detection element. the temperature sensor is provided such that at least a portion of the package faces a stator core of the stator in an axial direction of the stator, The temperature sensor is provided such that at least a portion of the temperature detection element is located between the conductive wire that fixes the temperature sensor and the stator core. Wiring components.

2. The fixing member is in contact with the stator core. The wiring component according to claim 1 .

3. The package is in contact with the stator core. The wiring component according to claim 1 .

4. A buffer material is provided between the fixing member and the stator core, The fixing member is in contact with the stator core via the buffer material. The wiring component according to claim 1 .

5. A buffer material is provided between the package and the stator core, The package is in contact with the stator core via the cushioning material. The wiring component according to claim 1 .

6. the fixing member is made of a molding resin provided so as to cover a part of the conductive wire and at least a part of the temperature sensor; The wiring component according to claim 1 .

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