Surge suppression device and wiring parts for motors

Abstract

To provide a surge suppression device and a wiring component for motors capable of improving the productivity.SOLUTION: A surge suppression device 1 comprises: a plurality of series circuit parts 2 each having a resistor 21 and a capacitor 22; and a case 4 on which the plurality of resistors 21 and the plurality of capacitors 22 are arranged. Respective capacitor 22 side ends of the plurality of series circuit parts 2 are electrically connected with each other via a connection electrode 33 provided on the case 4. A wiring component for motors supplies an AC current to a motor. The wiring component for motors comprises: a plurality of conductive wires connected with a stator coil of the motor; a wiring terminal provided at end parts opposite to a side connected with the stator coil, of the plurality of conductive wires and connected with electrodes of a terminal base; and the surge suppression device 1.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present invention relates to a surge suppression device and a wiring component for a motor.

Background Art

[0002] A wiring material for a motor that supplies a three-phase alternating current from an inverter to a motor is known. The wiring material for a motor includes a plurality of conductive wires and connects the coil ends of the stator and the electrodes of the terminal block in the motor.

[0003] A pulse-shaped voltage is output from the inverter by pulse width modulation (PWM). A surge voltage is generated at the rising edge of this pulse-shaped voltage, and there is a risk that an overvoltage will be applied to the motor. Therefore, a surge suppression unit is used to suppress such a surge voltage and prevent an overvoltage from being applied to the motor (see, for example, Patent Document 1).

[0004] The surge suppression unit described in Patent Document 1 has three series circuits of a resistor and a capacitor, and the capacitor-side ends of the three series circuits are connected to each other. The three series circuits are housed in a housing.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] However, Patent Document 1 does not describe at all how the three series circuits arranged in the housing are electrically connected to each other. In the surge suppression unit described in Patent Document 1, there is room for improvement from the viewpoint of facilitating the electrical connection work between the plurality of series circuits arranged in the housing and improving productivity.

[0007] The present invention has been made in view of the above circumstances, and an object thereof is to provide a surge suppression device and a wiring component for a motor that can improve productivity.

Means for Solving the Problems

[0008] In order to achieve the above object, the present invention provides a surge suppression device including a plurality of series circuit portions having resistors and capacitors, and a case for arranging the plurality of resistors and the plurality of capacitors, wherein the ends of each of the plurality of series circuit portions on the capacitor side are electrically connected to each other via connection electrodes provided on the case.

[0009] Further, in order to achieve the above object, the present invention provides a wiring component for a motor that supplies an alternating current to a motor, including a plurality of conductive wires connected to a stator coil of the motor, wiring terminals provided at ends of the plurality of conductive wires on a side opposite to a side connected to the stator coil and connected to electrodes of a terminal block, and a surge suppression device for suppressing application of an overvoltage to the motor, wherein the surge suppression device includes a plurality of series circuit portions having resistors and capacitors, and a case for arranging the plurality of resistors and the plurality of capacitors, the ends of each of the plurality of series circuit portions on the resistor side are electrically connected to the respective conductive wires of each phase, and the ends of each of the plurality of series circuit portions on the capacitor side are electrically connected to each other via connection electrodes provided on the case.

Effects of the Invention

[0010] According to the present invention, it is possible to provide a surge suppression device and a wiring component for a motor that can improve productivity.

Brief Description of the Drawings

[0011]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Mode for Carrying Out the Invention

[0012] [Embodiment] Embodiments of the present invention will be described with reference to FIGS. 1 to 11. Note that the embodiments described below are shown as preferred specific examples for carrying out the present invention, and although there are parts that specifically illustrate various technically preferable technical matters, the technical scope of the present invention is not limited to this specific aspect.

[0013] (Description of Motor 11) FIG. 1 is a schematic diagram showing the overall configuration of a motor 11 provided with a wiring component 10 for a motor. The motor 11 is mounted on a vehicle such as an electric vehicle or a hybrid vehicle driven by electric power.

[0014] The motor 11 includes a rotor 111, a stator 112 disposed so as to surround the rotor 111, and a terminal block 113. The rotor 111 is configured by embedding a plurality of magnets 111b in a rotor core 111a made of a soft magnetic metal, and rotates together with a shaft 114 inserted through the central portion. The stator 112 has a stator core 112a made of a soft magnetic metal and a plurality of coil pieces 112b.

[0015] In the following description, the direction passing through the rotation axis O of the shaft 114 and perpendicular to the rotation axis O is referred to as the radial direction, and the rotation direction of the shaft 114 is referred to as the circumferential direction.

[0016] Although not shown, the stator core 112a integrally has a cylindrical back yoke and a plurality of teeth protruding radially inward from the back yoke. Slots are formed between the circumferentially adjacent teeth. Each coil piece 112b is accommodated and held in a slot of the stator core 112a.

[0017] Further, the coil piece 112b has a conductive metal 112M having good conductivity such as copper or aluminum, and an electrically insulating coating layer 112I covering the surface of the conductive metal 112M. In this embodiment, the conductive metal 112M is a flat wire having a rectangular cross section, and the coating layer 112I is made of an enamel coating. At the coil end 112c which is the end of the coil piece 112b, the coating layer 112I is removed and the conductive metal 112M is exposed. Each coil piece 112b has the coil ends 112c welded to each other, and constitutes two sets of three-phase (U-phase, V-phase, and W-phase) stator coils 112d in which the electrical angle phases are shifted by a predetermined angle.

[0018] The motor 11 also includes a housing (not shown) that houses the stator 112, and a terminal block 113 fixed to the housing. The terminal block 113 has a base 113a made of resin fixed to the housing, and three electrodes 113b to which a three-phase alternating current (a pulse-like signal by pulse width modulation) is supplied from an inverter.

[0019] Furthermore, the motor 11 includes the motor wiring component 10 according to this embodiment. The motor wiring component 10 is a member for connecting the coil end 112c of the stator 112 and the electrode 113b of the terminal block 113, and supplies the three-phase alternating current supplied from the inverter via the electrode 113b of the terminal block 113 to the stator coils 112d of each phase of the motor 11.

[0020] (Motor wiring component 10) FIG. 2 is a first perspective view showing the motor wiring component 10 including the surge suppression device 1. FIG. 3 is a second perspective view showing the motor wiring component 10 including the surge suppression device 1. FIG. 4 is a circuit diagram of the motor wiring component 10.

[0021] As shown in FIGS. 2 and 3, the surge suppression device 1 of this embodiment suppresses the application of a surge voltage to the motor 11 and constitutes a part of the motor wiring component 10. The motor wiring component 10 is formed by assembling the surge suppression device 1 to the wiring unit 100. As shown in FIG. 4, the wiring unit 100 constitutes wiring for electrically connecting the motor 11 and the inverter 12. The wiring unit 100 has a U-phase wiring part 13u through which the U-phase current output from the inverter 12 flows, a V-phase wiring part 13v through which the V-phase current output from the inverter 12 flows, and a W-phase wiring part 13w through which the W-phase current output from the inverter 12 flows. Also, as shown in FIGS. 2 and 3, the wiring unit 100 includes a holding part 14 that holds the U-phase wiring part 13u, the V-phase wiring part 13v, and the W-phase wiring part 13w. Hereinafter, when the U-phase wiring part 13u, the V-phase wiring part 13v, and the W-phase wiring part 13w are not particularly distinguished, they are simply referred to as the wiring part 13.

[0022] The wiring part 13 includes two conductive wires 131, one end of which is electrically connected to the coil end 112c of the stator 112 of the motor 11, and a wiring terminal 132 crimped to the other ends of the two conductive wires 131. One ends of the two conductive wires 131 of the wiring part 13 are respectively connected to two sets of stator coils 112d of each layer wound around the stator core 112a. The other ends of the two conductive wires 131 of the wiring part 13 are collectively inserted into the barrel 132a of the wiring terminal 132 and fixed to the wiring terminal 132 by caulking the barrel 132a toward the two conductive wires 131. The wiring terminal 132 is connected to the electrode 113b of the terminal block 113. The part of the conductive wire 131 excluding both ends is covered by an insulating coating 130.

[0023] The holding part 14 integrates three wiring parts 13. The holding part 14 is made of, for example, a thermoplastic resin, and is integrally formed with the three wiring parts 13 by insert molding in which molten resin is injected into a molding die with a part of each of the three wiring parts 13 arranged inside the molding die and then cured. The resin constituting the holding part 14 can be, for example, PPS (polyphenylene sulfide) resin.

[0024] As shown in FIG. 3, the holding part 14 is formed with a mounting part 141 that protrudes in one direction and on which the surge suppression device 1 is mounted. The surge suppression device 1 is mounted on the mounting part 141. In this embodiment, the surge suppression device 1 is mounted on the mounting part 141 and fixed to the wiring unit 100 when three terminal parts 311 described later are connected to the three wiring parts 13. Note that the fixing method of the surge suppression device 1 to the wiring unit 100 is not limited to this. For example, an engagement piece for snap fit may be formed on a case 4 of the surge suppression device 1 described later, and the surge suppression device 1 may be fixed to the holding part 14 by snap fit. Also, it is possible to configure the surge suppression device 1 and the holding part 14 to be slidably engaged with each other.

[0025] (Surge suppression device 1) FIG. 5 is a first perspective view of the surge suppression device 1. FIG. 6 is a second perspective view of the surge suppression device 1. FIG. 7 is a front view of the surge suppression device 1. FIG. 8 is a side view of the surge suppression device 1. FIG. 9 is an exploded perspective view of the surge suppression device 1.

[0026] As shown in FIGS. 4, 5, and 6, the surge suppression device 1 has three series circuit portions 2 in which a resistor 21 and a capacitor 22 are connected in series. The end of the series circuit portion 2 on the resistor 21 side is electrically connected to the conductive wire 131 of each phase. Also, the ends of the three series circuit portions 2 on the capacitor 22 side are star-connected by being electrically connected to each other. The surge suppression device 1 includes three resistors 21, three capacitors 22, and a case 4 in which a terminal electrode 31, a relay electrode 32, and a connection electrode 33 described later are integrally provided.

[0027] As the resistor 21, for example, one made of conductive rubber or conductive plastic can be used. For example, the resistor 21 can be configured by inserting lead wires 212a and 212b into both end portions of a resistor main body portion 211 made of conductive rubber or conductive plastic. Note that the resistor 21 is not limited to this, and the resistor 21 may be configured by forming a pattern with a high-resistance material such as carbon, or the resistor 21 may be configured by combining resistors with leads used in an electric circuit or the like.

[0028] The resistor 21 has a resistor main body portion 211 formed in a rectangular prism shape that is long in one direction, and a lead wire 212a connected to the terminal electrode 31 described later from one side in the longitudinal direction and a lead wire 212b connected to the capacitor are respectively drawn out from the other side.

[0029] The capacitor 22 includes a capacitor main body 221 having an element built therein and a pair of lead wires 222a and 222b protruding from the same side of the capacitor main body 221. The lead wire 222a is connected to the lead wire 212b of the resistor 21 via the relay electrode 32, and the lead wire 222b is connected to the connection electrode 33.

[0030] The pair of lead wires 212a and 212b of the resistor 21 and the pair of lead wires 222a and 222b of the capacitor 22 have a bent shape in a predetermined form, which will be described later. The resistor 21 is accommodated in a resistor placement recess 424 of the case 4, which will be described later, and the capacitor 22 is accommodated in a capacitor placement recess 425 of the case 4, which will be described later.

[0031] The case 4 can be made of a resin with high thermal conductivity to dissipate the heat of the accommodated resistor 21 and capacitor 22. Specifically, the material constituting the case 4 can be an insulating heat dissipation material obtained by mixing a ceramic material (heat conductive filler) with high insulation and high thermal conductivity into an engineering plastic such as PA6 (polyamide 6) or PBT (polybutylene terephthalate), or a super engineering plastic such as PPS (polyphenylene sulfide). These insulating heat dissipation materials have a thermal conductivity 1 to 10 W / m / K and about 5 to 50 times higher than that of a general plastic material (about 0.2 W / m / K).

[0032] The case 4 is formed in a rectangular plate shape such that its shape when viewed from the thickness direction is substantially rectangular. Hereinafter, the longitudinal direction of the case 4 is the X direction, the short side direction of the case 4 is the Y direction, and the direction orthogonal to both the X direction and the Y direction and being the thickness direction of the case 4 is the Z direction.

[0033] The case 4 has a rectangular plate-shaped bottom wall 41 having a thickness in the Z direction and side walls 42 erected from each side of the bottom wall 41 to one side in the Z direction. The side walls 42 have a pair of lateral side walls 421 extending in the X direction and a pair of longitudinal side walls 422 extending in the Y direction. One of the pair of longitudinal side walls 422, the first longitudinal side wall 422a, is formed to be thicker than the other longitudinal side wall 422, the second longitudinal side wall 422b.

[0034] Also, between a pair of lateral side walls 421, two partition walls 423 are formed which divide the area surrounded by the side wall 42 and the bottom wall 41 into three areas. The partition walls 423 are formed to be long in the X direction, both ends in the X direction thereof are connected to the pair of lateral side walls 421, and one end in the Z direction is connected to the bottom wall 41. Three resistor placement recesses 424 are formed by the bottom wall 41, the side wall 42, and the two partition walls 423.

[0035] The resistor placement recesses 424 house the resistor body portions 211 of the resistors 21. In this embodiment, the resistor body portions 211 of the three resistors 21 are arranged in different resistor placement recesses 424. The resistor placement recesses 424 are formed to be long in the X direction and open on the side opposite to the bottom wall 41 in the Z direction. The three resistor placement recesses 424 are formed to be arranged in the Y direction. In this embodiment, an example is shown in which each of the three resistor placement recesses 424 houses each of the three resistor body portions 211, but it is not limited thereto. For example, the partition walls 423 can be eliminated for the case 4 of this embodiment, and a configuration can be adopted in which the three resistor body portions 211 are collectively housed in one large resistor placement recess.

[0036] Six lead-out recesses 422c for inserting the six lead wires 212a, 212b of the resistor 21 are formed in the pair of vertical side walls 422. The lead-out recesses 422c are formed to lead out the lead wires 212a, 212b of the resistor 21 arranged in the resistor placement recess 424 to the outside of the case 4. The lead-out recesses 422c open on the same side as the side where the resistor placement recess 424 opens in the Z direction and are formed to penetrate the vertical side wall 422 in the X direction. For example, the three lead-out recesses 422c formed in the second vertical side wall 422b may be made into one large recess, and the three lead wires 212a of the three resistors 21 may be collectively inserted into the one large recess.

[0037] On the first vertical side wall 422a, three capacitor placement recesses 425 for accommodating three capacitors 22 respectively are formed. The three capacitor placement recesses 425 are recesses formed to open to the outer surface of the first vertical side wall 422a. Here, when referring to the "outer side", it means the side away from the inside of the case, and when referring to the "outer surface", it means the surface facing the outer side. As shown in FIG. 8, when viewed from the X direction, the three capacitor placement recesses 425 are each formed to be long in the X direction and are formed to be arranged in the Y direction. As shown in FIG. 7, the side of the capacitor placement recess 425 on the second vertical side wall 422b side in the X direction is blocked by a part of the first vertical side wall 422a. That is, the capacitor placement recess 425 and the resistor placement recess 424 do not communicate with each other.

[0038] The capacitor placement recess 425 is formed at a position farther from the bottom wall 41 side in the Z direction than the three lead-out recesses 422c formed in the first vertical side wall 422a. When viewed from the X direction, the three capacitor placement recesses 425 are formed at positions overlapping with different resistors 21 in the X direction. The capacitor 22 has the capacitor body 221 part accommodated in the capacitor placement recess 425, and a pair of lead wires 222a, 222b of the capacitor 22 are drawn out from the capacitor placement recess 425 to the outside of the capacitor placement recess 425.

[0039] Also, in the case 4, a protruding wall 426 protruding from the end of the bottom wall 41 on the first vertical side wall 422a side in the X direction to the side opposite to the side where the side wall 42 stands upright in the Z direction is formed. The surface of the protruding wall 426 on the side opposite to the second vertical side wall 422b side in the X direction is formed flush with the outer surface of the first vertical side wall 422a. A connection electrode 33 described later is fixed to the surface of the protruding wall 426 on the side opposite to the second vertical side wall 422b side in the X direction.

[0040] The electrical connection between the three capacitors 22, the electrical connection between the capacitor 22 and the resistor 21, and the electrical connection between the resistor 21 and the conductive wire 131 are each made through the electrode 31 with a terminal, the relay electrode 32, or the connection electrode 33 fixed to the case 4. In this embodiment, the case 4 is formed by insert molding in which the molten resin constituting the case 4 is injected into the mold for molding the case 4 with the electrode 31 with a terminal, the relay electrode 32, and the connection electrode 33 arranged inside the mold and then cured. As a result, each of the electrode 31 with a terminal, the relay electrode 32, and the connection electrode 33 is integrated with the case 4 in a form buried in the case 4 while exposing its surface. Each of the electrode 31 with a terminal, the relay electrode 32, and the connection electrode 33 is buried in the case 4 by its thickness, and the surface exposed from the case 4 is formed to be substantially flush with the surface of the case 4. Note that the electrode 31 with a terminal, the relay electrode 32, and the connection electrode 33 may be fixed to the case 4 by a method such as press-fitting, thermal welding, or adhesion.

[0041] As shown in FIG. 6, the three electrodes 31 with terminals are connected to the lead wires 212a of different resistors 21. The electrode 31 with a terminal has a shape formed by bending a long plate shape, a part of which is arranged at a position outside the second vertical side wall 422b, and the other part is formed at a position on the bottom wall 41 opposite to the side where the side wall 42 stands.

[0042] At one end of each of the three electrodes 31 with terminals, a terminal portion 311 is formed. The terminal portion 311 is not buried in the case 4 but is drawn out from the case 4. As shown in FIG. 2, each of the three terminal portions 311 is connected to the conductive wire 131 of a different wiring portion 13 (U-phase wiring portion 13u, V-phase wiring portion 13v, and W-phase wiring portion 13w). The three terminal portions 311 are arranged side by side in the X direction. The three terminal portions 311 have a shape bent in a U shape so as to open to the same side in the X direction, and the conductive wire 131 of the wiring portion 13 is inserted therein.

[0043] FIG. 10 is a perspective view showing a state before the surge suppression device 1 is assembled to the wiring unit 100. FIG. 11 is a perspective view showing a state after the surge suppression device 1 is assembled to the wiring unit 100. When attaching the surge suppression device 1 to the wiring unit 100, first, as shown in FIG. 10, the surge suppression device 1 is placed on the placement portion 141, and the conductive wires 131 of the wiring portion 13 to be inserted are positioned on the opening sides of the three terminal portions 311, respectively. Then, as shown in FIGS. 10 and 11, the surge suppression device 1 and the wiring unit 100 are relatively moved in opposite directions in the X direction. Thereby, the conductive wires 131 of the three-phase wiring portion 13 can be inserted into the three terminal portions 311 at once. Therefore, in this embodiment, the surge suppression device 1 can be easily retrofitted to the wiring unit 100. The terminal portion 311 and the conductive wire 131 may be joined to each other by welding or the like after the conductive wire 131 is inserted into the terminal portion 311. Also, as shown in FIG. 6, the three terminal portions 311 are arranged on the protruding side end surfaces of the three bottom wall convex portions 411 formed to protrude on the bottom wall 41. Thereby, the three terminal portions 311 are arranged at positions separated in the Z direction from the main surface on the side opposite to the side where the side wall 42 stands on the bottom wall 41.

[0044] As shown in FIG. 6, the end portions 312 of each of the three-terminal electrodes 31 on the side opposite to the side where the terminal portions 311 are formed are arranged at positions close to the upper side (for example, the upper side in FIGS. 6 and 8), which is one side in the Y direction, with respect to the three lead-out recesses 422c formed in the second vertical side wall 422b. Here, the side opposite to the upper side in the Y direction (for example, the lower side in FIGS. 6 and 8) is referred to as the lower side. The expressions of upper and lower are for convenience and do not limit the posture with respect to the vertical direction in the usage state of the surge suppression device 1, for example. The lead wires 212a inserted into the adjacent lead-out recesses 422c are connected to the end portions 312 of the three-terminal electrodes 31. The three lead wires 212a respectively arranged in the three lead-out recesses 422c formed in the second vertical side wall 422b are all bent upward in the outer region of the case 4, and the upper portions from the bent portions are welded to the end portions 312 of the three-terminal electrodes 31. As shown in FIGS. 5 and 8, the lead wire 212b on the side connected to the capacitor 22 of the resistor 21 is connected to the relay electrode 32.

[0045] The relay electrode 32 is an electrode that electrically relays between the resistor 21 and the capacitor 22 in the series circuit portion 2 and is formed in a plate shape. Three relay electrodes 32 are formed at outer portions on the first vertical side wall 422a. The three relay electrodes 32 are formed at positions adjacent to the side opposite to the protruding wall 426 side in the Z direction of the three capacitor arrangement recesses 425. The three relay electrodes 32 are arranged side by side in the Y direction and are arranged at positions close to the upper side with respect to each of the three lead-out recesses 422c formed in the first vertical side wall 422a.

[0046] The lead wire 212b inserted into the adjacent lead-out recesses 422c is connected to the relay electrode 32. The three lead wires 212b respectively arranged in the three lead-out recesses 422c formed in the first vertical side wall 422a are all bent upward outside the case 4, and the upper portions from the bent portions are welded to the relay electrode 32.

[0047] Further, the relay electrode 32 has the upper lead wire 222a of the capacitor 22 accommodated in the capacitor placement recess 425 adjacent in the Z direction welded thereto. The upper lead wire 222a of the capacitor 22 is bent to the side opposite to the protruding wall 426 side in the Z direction, and the portion from the bent portion to the tip side is connected to the relay electrode 32. And the lower lead wire 222b of the capacitor 22 is bent to the protruding wall 426 side in the Z direction, and the portion from the bent portion to the tip side is welded to the connection electrode 33. That is, in this embodiment, the pair of lead wires 222a and 222b of the capacitor 22 has a shape bent toward opposite sides in the Z direction.

[0048] The connection electrode 33 is an electrode that electrically connects the lower lead wires 222b of the three capacitors 22 to each other. The connection electrode 33 is formed at the outer portion of the first vertical side wall 422a and the protruding wall 426. Further, the connection electrode 33 is formed on the side opposite to the three relay electrodes 32 with the three capacitor placement recesses 425 interposed therebetween. In other words, the plurality of capacitors 22 are positioned between the connection electrode 33 and the plurality of relay electrodes 32. The connection electrode 33 is formed to be long in the Y direction so as to be adjacent to the lower lead wires 222b of the three capacitors 22 in the Z direction. The tip side from the bent portion of the lower lead wire 222b of each of the three capacitors 22 is connected to the connection electrode 33.

[0049] As described above, the connection between the resistor 21 and the capacitor 22 in the series circuit section 2 is performed via the relay electrode 32, the connection between the ends on the capacitor 22 side of the three series circuit sections 2 is performed via the connection electrode 33, and the connection between the end on the resistor 21 side of the series circuit section 2 and the conductive wire 131 of the wiring section 13 is performed via the terminal electrode 31.

[0050] (Manufacturing method of the surge suppression device 1) An example of the manufacturing method of the surge suppression device 1 of this embodiment will be described. First, prepare a case 4 provided with an electrode 31 with terminals, a relay electrode 32, and a connection electrode 33, a resistor 21 in which a pair of lead wires 212a and 212b are bent into a predetermined shape, and a capacitor 22 in which a pair of lead wires 222a and 222b are bent into a predetermined shape.

[0051] Then, insert three resistors 21 into the three resistor placement recesses 424 of the case 4 in the Z direction, and insert three capacitors 22 into the three capacitor placement recesses 425 of the case 4 in the X direction. At this time, while inserting the pair of lead wires 212a and 212b of the resistor 21 into the lead-out recess 422c, the resistor main body 211 is accommodated in the resistor placement recess 424. Also, for the capacitor 22, the capacitor main body 221 is accommodated in the capacitor placement recess 425, and the pair of lead wires 222a and 222b are exposed from the capacitor placement recess 425. In a state where three resistors 21 and three capacitors 22 are arranged in the case 4, the lead wire 212a of the resistor 21 faces the electrode 31 with terminals, the lead wire 212b of the resistor 21 and the lead wire 222a of the capacitor 22 face the relay electrode 32, and the lead wire 222b of the capacitor 22 faces the connection electrode 33.

[0052] Next, weld the lead wire 212a of the resistor 21 and the electrode 31 with terminals, weld each of the lead wire 212b of the resistor 21 and the lead wire 222a of the capacitor 22 to the relay electrode 32, and weld the lead wire 222b of the capacitor 22 and the connection electrode 33. Thus, the surge suppression device 1 can be manufactured.

[0053] (Operations and Effects of the Embodiment) In the surge suppression device 1 of this embodiment, three series circuit portions 2 each having a resistor 21 and a capacitor 22 are assembled in a case 4. Further, the end portions of each of the three series circuit portions 2 on the capacitor 22 side are electrically connected to each other via connection electrodes 33 provided on the case 4. Therefore, by assembling the three capacitors 22 in the case 4, the positioning among the three capacitors 22, the case 4, and the connection electrodes 33 is achieved to a certain extent, and in this state, the connection work between the lead wires 222b of the three capacitors 22 and the connection electrodes 33 can be performed. Thereby, the productivity of the surge suppression device 1 can be improved.

[0054] Also, the end portions of each of the three series circuit portions 2 on the resistor 21 side are electrically connected to terminal electrodes 31 each having a terminal portion 311 provided on the case 4 and connected to an external conductive wire 131. Therefore, for example, it is not necessary to form the lead wire 212a of the resistor 21 into a special shape, and the connection between the resistor 21 and the conductive wire 131 can be easily performed via the terminal electrodes 31. Further, by adopting a configuration in which the lead wire 212a of the resistor 21 is connected to the terminal electrode 31 provided on the case 4, the electrical connection work between the lead wire 212a of the resistor 21 and the terminal electrode 31 can be performed in a state where the resistor 21 is positioned in the case 4 to a certain extent, and the productivity of the surge suppression device 1 can be improved.

[0055] Also, the terminal portions 311 of the three terminal electrodes 31 are arranged side by side in the X direction and have a bent shape that opens on the same side in the X direction. Therefore, as described above, by relatively moving the wiring unit 100 and the surge suppression device 1 in the X direction so that the three wiring portions 13 are inserted into the openings of the three terminal portions 311, it is possible to easily connect the three terminal portions 311 and the three wiring portions 13.

[0056] Also, in each of the three series circuit portions 2, the resistor 21 and the capacitor 22 are electrically connected via the relay electrode 32 provided on the case 4. Therefore, by assembling the resistor 21 and the capacitor 22 to the case 4 and connecting each of the resistor 21 and the capacitor 22 to the relay electrode 32 provided on the case 4 in a state where the relative positioning among the resistor 21, the capacitor 22, and the case 4 is achieved to some extent, the electrical connection between the resistor 21 and the capacitor 22 can be facilitated, and as a result, the productivity of the surge suppression device 1 can be improved.

[0057] Also, the three capacitors 22 are arranged in the case 4 so as to be aligned in the Y direction, the connection electrode 33 is formed to be long in the Y direction, and the three relay electrodes 32 are arranged so as to be aligned in the Y direction. And the three capacitors 22 are arranged at positions between the connection electrode 33 and the three relay electrodes 32. According to this configuration, the connection between the three capacitors 22, the connection electrode 33, and the three relay electrodes 32 can be realized in a small space.

[0058] Also, the case 4 is formed with a lead-out recess 422c for leading out the lead wires 212a, 212b of the three resistors 21 arranged in the case 4 to the outside of the case 4. Since it is difficult to perform the connection work between the lead wires 212a, 212b of the resistor 21 and other parts inside the case 4, according to this configuration, the lead wires 212a, 212b of the resistor 21 can be easily led out of the case 4.

[0059] As described above, according to this embodiment, it is possible to provide a surge suppression device and a wiring component for a motor that can improve productivity.

[0060] (Modification of the embodiment)

[0061] In the embodiment, the wiring unit 100 is described as an example including three-phase wiring portions 13u to 13w, but it is not limited thereto, and it may have two-phase wiring portions. In this case, the series circuit portion 2 of the surge suppression device 1 has two units.

[0062] Also, the case 4 can be made of metal. In this case, insulation treatment is performed between the electrode 31 with a terminal, the relay electrode 32, and the connection electrode 33 and the case 4.

[0063] Also, for example, the lead wire 212b of the resistor 21 and the lead wire 212a of the capacitor 22 can be directly connected by welding or the like without passing through the relay electrode 32. Similarly, the connection between the lead wire 212a of the resistor 21 and the conductive wire 131 of the wiring can be made without passing through the electrode 31 with a terminal. In this case, it is conceivable to crimp the lead wire 212a of the resistor 21 together with the conductive wire 131 to the barrel 132a portion of the wiring terminal 132.

[0064] (Summary of the embodiment) Next, the technical idea grasped from the embodiment described above will be described by referring to the reference numerals and the like in the embodiment. However, each reference numeral and the like in the following description are not limited to the members and the like that specifically show the components in the claims in the embodiment.

[0065] [1] A surge suppression device (1) including a plurality of series circuit portions (2) having resistors (21) and capacitors (22), and a case (4) for arranging the plurality of resistors (21) and the plurality of capacitors (22), wherein the end portions of each of the plurality of series circuit portions (2) on the capacitor (22) side are electrically connected to each other via a connection electrode (33) provided on the case (4).

[0066] [2] The end portions of each of the plurality of series circuit sections (2) on the side opposite to the side connected to the respective connection electrodes (33) are electrically connected to electrode terminals (31) having terminal portions (311) that are provided in the case (4) and connected to an external conductive wire (131), the surge suppression device (1) according to [1] above.

[0067] [3] The terminal portions (311) of the plurality of electrode terminals (31) are arranged side by side in the terminal arrangement direction (Y), and have a shape bent so as to open on the same side in the terminal arrangement direction (Y), the surge suppression device (1) according to [2] above.

[0068] [4] In each of the plurality of series circuit sections (2), the resistor (21) and the capacitor (22) are electrically connected via relay electrodes (32) provided in the case (4), the surge suppression device (1) according to any one of [1] to [3] above.

[0069] [5] The plurality of capacitors (22) are arranged in the case (4) so as to be arranged in one direction (Y), the connection electrodes (33) are formed to be long in the one direction (Y), the plurality of relay electrodes (32) are arranged so as to be arranged in the one direction (Y), and the plurality of capacitors (22) are arranged at positions between the connection electrodes (33) and the plurality of relay electrodes (32), the surge suppression device (1) according to [4] above.

[0070] [6] The case (4) is formed with a drawing recess for drawing out the respective lead wires (212a, 212b) of the plurality of resistors (21) arranged in the case (4) to the outside of the case (4), the surge suppression device (1) according to any one of [1] to [5] above.

[0071] [7] A wiring component (10) for a motor that supplies an alternating current to a motor (11), comprising: a plurality of conductive wires (131) connected to a stator coil (112d) of the motor (11); and a plurality of conductive wires (131) provided at ends opposite to the side connected to the stator coil (112d), and wiring terminals (132) connected to electrodes (113b) of a terminal block (113); and a surge suppression device (1) for suppressing the application of an overvoltage to the motor (11). The surge suppression device (1) includes a plurality of series circuit portions (2) having a resistor (21) and a capacitor (22), and a case (4) for arranging the plurality of resistors (21) and the plurality of capacitors (22). End portions of each of the plurality of series circuit portions (2) on the resistor (21) side are electrically connected to the conductive wires (131) of each phase, respectively, and end portions of each of the plurality of series circuit portions (2) on the capacitor (22) side are electrically connected to each other via connection electrodes (33) provided on the case (4). A wiring component (10) for a motor.

[0072] (Supplementary Note) The embodiments of the present invention have been described above. However, the above-described embodiments do not limit the invention according to the claims. It should also be noted that not all combinations of features described in the embodiments are essential means for solving the problems of the invention. Further, the present invention can be appropriately modified and implemented without departing from its gist.

Explanation of Reference Numerals

[0073] 1... Surge suppression device 10... Wiring component for motor 11... Motor 112d... Stator coil 113... Terminal block 113b... Electrode 131... Conductive wire 132... Wiring terminal 2... Series circuit portion 21... Resistor 212a, 212b... Lead wires of resistor 22... Capacitor 31... Electrode with terminal 311... Terminal part 32... Relay electrode 33... Connection electrode 4... Case 422c... Concave part for extraction

Claims

1. A plurality of series circuit portions having resistors and capacitors, a case for arranging the plurality of resistors and the plurality of capacitors, and end portions on the capacitor side of each of the plurality of series circuit portions are electrically connected to each other via connection electrodes provided on the case, end portions on the side opposite to the side connected to the connection electrodes of each of the plurality of series circuit portions are provided on the case and are electrically connected to electrode terminals with terminals having terminal portions connected to external conductive wires, the terminal portions of the plurality of electrode terminals with terminals are arranged side by side in a terminal arrangement direction and have a shape bent so as to open on the same side in the terminal arrangement direction, a surge suppression device.

2. In each of the plurality of series circuit portions, the resistor and the capacitor are electrically connected via relay electrodes provided on the case, The surge suppression device according to claim 1.

3. A plurality of series circuit portions having resistors and capacitors, a case for arranging the plurality of resistors and the plurality of capacitors, and end portions on the capacitor side of each of the plurality of series circuit portions are electrically connected to each other via connection electrodes provided on the case, in each of the plurality of series circuit portions, the resistor and the capacitor are electrically connected via relay electrodes provided on the case, a surge suppression device.

4. The plurality of capacitors are arranged in the case so as to be arranged in one direction, the connection electrodes are formed to be long in the one direction, the plurality of relay electrodes are arranged so as to be arranged in the one direction, the plurality of capacitors are arranged at positions between the connection electrodes and the plurality of relay electrodes, The surge suppression device according to claim 2 or 3.

5. In the case, a drawing recess for drawing out each lead wire of the plurality of resistors arranged in the case to the outside of the case is formed, The surge suppression device according to any one of claims 1 to 4.

6. A wiring component for a motor that supplies alternating current to a motor, a plurality of conductive wires connected to a stator coil of the motor, wiring terminals provided at ends on the side opposite to the side connected to the stator coil of the plurality of conductive wires and connected to electrodes of a terminal block, and a surge suppression device for suppressing application of an overvoltage to the motor. The surge suppression device includes a plurality of series circuit portions each having a resistor and a capacitor, and a case for arranging the plurality of resistors and the plurality of capacitors. The end portions on the resistor side of each of the plurality of series circuit portions are electrically connected to the conductive wires of each phase, respectively. The end portions on the capacitor side of each of the plurality of series circuit portions are electrically connected to each other via connection electrodes provided on the case. In each of the plurality of series circuit portions, the resistor and the capacitor are electrically connected via relay electrodes provided on the case. Wiring parts for a motor.

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