JP2008136342A - Concentrated power distribution component - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a concentrated power distribution component which has a circular conductor shortened in length, can be easily manufactured, while ensuring electrical insulation among the adjacent circular conductors, and which can be miniaturized. <P>SOLUTION: The concentrated power distribution component is provided with a plurality of circular conductors 10, 11, 12, 13; a plurality of relay terminals 40 independently connected to each of the circular conductors via an electrical connection portion; a plurality of holding components 31-34 for holding the circular conductors, in a state with the circular conductors being stacked along the center axis of each of the circular conductors and each having electric insulation and mechanically fixed to the circular conductors. The electrical connection portions between the circular conductors and the relay terminals are disposed in the holding components 31-34. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a concentrated power distribution component for a motor, and more particularly to a concentrated power distribution component for performing power distribution in a concentrated manner with respect to a plurality of coils arranged in a stator of a motor mounted on a vehicle.

  In recent years, hybrid cars have been developed in order to save energy with an emphasis on the environment. The hybrid car uses an engine using fossil fuel as the main power source of the automobile, and includes a motor assist mechanism for assisting the engine.

  A motor used in an automobile includes, for example, a rotor directly connected to an engine shaft, and a ring-shaped stator disposed around the rotor. This stator has a large number of magnetic poles formed by applying a multi-phase coil to the core, a stator holder that houses these magnetic poles, and a concentrated power distribution for the multi-phase coils. Has power distribution components.

  Conventional concentrated power distribution components have U-phase, V-phase, and W-phase bus rings. Each bus ring is formed by bending a linear conductor into a substantially annular shape, and by bending a part of these bus rings, a plurality of pieces that are bent into U-shapes inward along the diameter direction are formed. A terminal portion is formed. These terminal portions are electrically and mechanically connected to the coil.

  The bus ring has a plurality of protruding terminal portions so that each bus ring is electrically and mechanically connected to a coil at a corresponding position so that adjacent bus rings are not in electrical contact with each other. This is to ensure electrical insulation by securing the mutual distance. The terminal portions of the respective bus rings protrude inward on the coil side and are bent into a U shape at positions different from each other in the circumferential direction.

Further, by bending a part of each bus ring in this way, a plurality of terminal portions are formed to protrude toward the coil side, thereby facilitating electrical and mechanical connection between the terminal portions and the coil. (For example, refer to Patent Document 1).
Japanese Patent Laid-Open No. 2005-229677

  However, in the centralized power distribution component of Patent Document 1, each bus ring must be bent into a complicated shape, and in order to form such a complex shaped bus ring, the required linear conductors are formed. Compared with the case of forming a simple ring-shaped member, the length becomes considerably long, so that the processing cost cannot be reduced, and the material cost increases.

  In addition, each bus ring is formed with a plurality of terminal portions projecting inward, so that the bus ring is larger than a simple annular one, and a plurality of buses are accommodated in the housing space of the stator housing of the motor. In order to accommodate the ring assembly, the accommodation space becomes large, and an increase in the size of the motor is inevitable.

  Accordingly, in order to solve the above-mentioned problems, the present invention provides a centralized power distribution component which can be easily manufactured and reduced in size while ensuring the electrical insulation between the adjacent annular conductors by reducing the length of the annular conductors. The purpose is to do.

In order to solve the above problems, the central power distribution component of the present invention is a central power distribution component that is disposed on the stator of the motor and electrically connected to the coil of the stator,
A plurality of annular conductors;
A plurality of relay terminals respectively connected to the plurality of annular conductors by electrical connection portions;
Electrical insulation that is mechanically fixed to the plurality of annular conductors for holding the annular conductors in a state where the plurality of annular conductors are laminated along the central axis direction of the plurality of annular conductors. Having a plurality of holding parts;
With
The electrical connection portion between the annular conductor and the relay terminal is disposed in the holding component.

In the concentrated power distribution component according to the present invention, preferably, the plurality of annular conductors are formed by bending a linear conductor, and the plurality of holding components are formed for each of the annular conductors by molding a resin. And
There is an exposed portion of the annular conductor between the plurality of holding parts set for each annular conductor, and the exposed portion of the annular conductor is not adjacent to the exposed portion of the adjacent annular conductor. As described above, the holding parts are laminated.

The concentrated power distribution component of the present invention is preferably configured such that the number of the coils of the motor is n, the diameter of the concentrated power distribution component is D mm, and the shortest distance between the annular conductors is hmm. The distance L between the exposed portions of
h + πD / 2n-2> L
It is characterized by satisfying.
In the concentrated power distribution component of the present invention, preferably, the annular conductor is a conductor having an insulating layer, and the core terminal of the relay terminal and the annular conductor is electrically and mechanically connected by welding. .
In the concentrated power distribution component according to the present invention, preferably, the inner diameters of the plurality of annular conductors are substantially the same, and a circular space is formed inside the plurality of annular conductors.

The centralized power distribution component of the present invention, preferably the relay terminal,
An annular conductor connecting end electrically connected by engaging with the core wire of the annular conductor;
A coil connection end electrically connected to a connection protrusion of the stator coil;
It is characterized by having.

  The concentrated power distribution component of the present invention is preferably characterized in that the coil connection end of the relay terminal has a region that can be connected to a connection projection of the coil along the axial direction of the annular conductor. To do.

  In the concentrated power distribution component according to the present invention, preferably, the plurality of annular conductors include at least a U-phase annular conductor, a V-phase annular conductor, and a W-phase annular conductor of a three-phase brushless motor.

  The concentrated power distribution component according to the present invention is preferably characterized in that the plurality of annular conductors further include a neutral phase annular conductor.

  According to the centralized power distribution component of the present invention, the length of the annular conductor can be shortened, and it can be easily manufactured and the size can be reduced while ensuring electrical insulation between adjacent annular conductors.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a perspective view showing a preferred embodiment of the central power distribution component of the present invention. FIG. 2 is an exploded perspective view of the central power distribution component of FIG.

  A centralized power distribution component 1 shown in FIGS. 1 and 2 is used to supply drive current to a plurality of windings (coils) of a three-phase DC brushless motor mounted on a hybrid vehicle, for example. This motor includes, for example, a rotor directly connected to an engine shaft, and a ring-shaped stator disposed around the rotor. This stator has a large number of magnetic poles formed by arranging a plurality of phase coils in a core, a stator holder that houses these magnetic poles, and a power distribution system for the plurality of phase coils. It has a centralized power distribution component 1.

  A concentrated power distribution component 1 shown in FIG. 1 is an annular concentrated power distribution member having a central axis CL. The concentrated power distribution component 1 includes an annular conductor 10 for a neutral phase, annular conductors 11, 12, 13 for three phases, a plurality of holding components 31, 32, 33, 34 having electrical insulation, and conductivity. A plurality of relay terminals 40 are provided.

  The annular conductor 11 corresponds to the U phase of the three-phase brushless motor, the annular conductor 12 corresponds to the V phase, and the annular conductor 13 corresponds to the W phase. Each of the annular conductors 11, 12, 13, and 10 is formed by bending a linear electric conductive member into an annular shape.

  First, the neutral-phase annular conductor 10 and the three-phase annular conductors 11, 12, and 13 shown in FIG. 1 will be described.

  The annular conductors 11, 12, 13 and the annular conductor 10 are preferably circular in cross section, also referred to as wires, and enameled wires having substantially the same diameter centered on the central axis CL are used. Is, for example, 3.2 mm. The enameled wire is covered with an insulating film except for the portion electrically and mechanically connected to the relay terminal 40. The annular conductors 10, 11, 12, and 13 are integrally configured by being stacked so as to be overlapped along the central axis CL direction.

  As shown in FIG. 1, both end portions of the annular conductor 11 are connected to the power supply terminal 11D. Similarly, both ends of the annular conductor 12 are connected to the power supply terminal 12D, and both ends of the annular conductor 13 are connected to the power supply terminal 13D. Both end portions 10C of the annular conductor 10 are electrically short-circuited and connected. The power feeding terminals 11D, 12D, 13D and the both end portions 10C are arranged at positions shifted from each other in the circumferential direction R.

  As shown in FIG. 3, the power supply terminal 11D, the power supply terminal 12D, and the power supply terminal 13D are electrically connected to one end of the U-phase coil 100, the V-phase coil 101, and the W-phase coil 102, respectively. The sex-phase annular conductor 10 is electrically connected to the other ends of the U-phase coil 100, the V-phase coil 101, and the W-phase coil 102.

  Next, with reference to FIG. 1 and FIG. 2, the holding components 31, 32, 33, and 34 set in the annular conductors 10, 11, 12, and 13 will be described.

  The plurality of holding components 31, 32, 33, and 34 are set to be spaced from each other along the circumferential direction R with respect to the annular conductors 10, 11, 12, and 13 of the concentrated power distribution component 1.

  The holding parts 31, 32, 33, 34 are formed by molding using a heat-resistant resin such as PPS (polyphenylene sulfide) having electrical insulation. The holding parts 31, 32, 33, 34 are annular conductors 10, 11, 12, 34 with an interval for electrical insulation between the annular conductors 10, 11, 12, 13 along the central axis CL direction. 13 is a holding member for holding 13 in parallel.

The holding parts 31, 32, 33, and 34 will be described in order with reference to FIG. 2 and FIGS.
FIG. 4 is a perspective view showing a part of the neutral-phase annular conductor 10. FIG. 5 is a perspective view showing a part of the U-phase annular conductor 11. FIG. 6 is a perspective view showing a part of the V-phase annular conductor 12. FIG. 7 is a perspective view showing a part of the W-phase annular conductor 13.

  As shown in FIGS. 2 and 4, the plurality of holding components 31 are formed by molding at a distance from the neutral-phase annular conductor 10. Each holding component 31 is a substantially rectangular parallelepiped component having the same size, and includes a relay terminal 40. An exposed portion 600 of the annular conductor 10 is positioned between the adjacent holding components 31 and 31. A part or all of the plurality of holding parts 31 has a mounting portion 800 having a U-shaped cross section below the holding part 31, and the mounting part 800 exposes the adjacent U-phase annular conductor 11. This is for holding the portion 601 (see FIG. 5) in between.

  As shown in FIGS. 2 and 5, the plurality of holding components 32 (32 </ b> X and 32 </ b> Y) are formed by molding at a distance from the U-phase annular conductor 11. Each holding part 32X, 32Y is a substantially rectangular parallelepiped part having the same size. Only the holding component 32X among the three adjacent holding components 32X, 32Y, and 32Y has the relay terminal 40. An exposed portion 601 of the annular conductor 11 is positioned between the adjacent holding components 32X, 32Y, and 32Y. The holding part 32X has a mounting portion 802 having a U-shaped cross section on the lower side, and the mounting portion 802 holds the exposed portion 602 (see FIG. 6) of the adjacent V-phase annular conductor 12 sandwiched therebetween. belongs to.

  As shown in FIGS. 2 and 6, the plurality of holding components 33 (33 </ b> X and 33 </ b> Y) are formed by molding at a distance from the V-phase annular conductor 12. Each holding part 33X, 33Y is a substantially rectangular parallelepiped part having a different size. The holding component 33X is longer than the holding component 33Y. Of the three holding components 33X and 33Y, only the holding component 33X has the relay terminal 40. An exposed portion 602 of the annular conductor 12 is positioned between the adjacent holding components 33X and 33Y.

As shown in FIG. 2 and FIG. 7, the plurality of holding components 34 are formed by molding at intervals from the W-phase annular conductor 13. Each holding part 34 is a substantially rectangular parallelepiped part having the same size, and one holding part 34 among three adjacent holding parts 34 includes a relay terminal 40. An exposed portion 603 of the annular conductor 13 is positioned between the adjacent holding parts 34 and 34. The holding part 34 has a mounting portion 801 having a U-shaped cross section on the upper side, and the mounting portion 801 is for holding the exposed portion 602 (see FIG. 6) of the adjacent V-phase annular conductor 12 between them. It is.
Note that the exposed portion 600 of the annular conductor 10 shown in FIG. 4, the exposed portion 601 of the annular conductor 11 shown in FIG. 5, the exposed portion 602 of the annular conductor 12 shown in FIG. 6, and the exposed portion of the annular conductor 13 shown in FIG. The portion 603 may be protected with an insulating tube, for example.

  FIG. 8 shows an example of a laminated structure of the annular conductors 10 to 13 and the holding components 31 to 34 in the portion T of FIG. The holding parts 31, 32, 33, and 34 are stacked along the central axis CL. Thereby, each annular conductor 10-13 can be hold | maintained in parallel and at the same space | interval using the holding components 31-34.

The positions of the holding components 31 to 34 are shifted in the R direction, and are arranged in a so-called staggered pattern. Thereby, the exposed part 600 of the annular conductor 10 faces the holding parts 32X and 32Y, and the exposed part 601 of the annular conductor 11 faces the holding parts 31 and 33X. Similarly, the exposed portion 602 of the annular conductor 12 faces the holding components 32X, 32Y, and 34, and the exposed portion 603 of the annular conductor 13 faces the holding component 33X.
Moreover, the thick line in FIG. 8 indicates an insulation creepage distance 900 for electrical insulation of adjacent annular conductors. Since the insulation creepage distance 900 can be secured between the adjacent exposed portions 600 to 603 due to the presence of the holding components 31 to 34, the electrical insulation performance of the adjacent exposed portions 600 to 603 can be secured.

Next, a structural example of the relay terminal 40 will be described with reference to FIG.
A plurality of relay terminals 40 are used in this embodiment. Thereby, the kind of relay terminal to be used can be reduced, and cost reduction can be achieved. The relay terminal 40 is, for example, a copper base material plated with tin, and has one annular conductor connection end 41, two coil connection ends 42 and 42, and a connection portion 43.

  The connecting portion 43 in FIG. 9 connects the annular conductor connecting end 41 and the coil connecting ends 42, 42. The annular conductor connecting end 41 protrudes from the connecting portion 43 along the H direction and is substantially U-shaped. It has a letter shape or J shape.

  The two coil connection ends 42 and 42 are formed so as to protrude in parallel from the connection portion 43 along the J direction. As shown in FIG. 10, the width K of the coil connection ends 42, 42 is set larger than the diameter M of the connection projection 150 of the coil. The lengths of the coil connection ends 42 are set with a sufficient margin so that the connection projection 150 can be electrically and mechanically contacted.

  The two coil connection ends 42, 42 shown in FIG. 10A are welded from a parallel state while being pressed against the connection protrusion 150 of the coil along the N direction as shown in FIG. 10B. Thereby, the two coil connection ends 42 and 42 and the connection projection 150 of the coil can be reliably connected electrically and mechanically by welding.

Next, an example of an electrical connection structure between the annular conductors 10 to 13 and the relay terminal 40 will be described with reference to FIGS.
As shown in FIGS. 11 to 14, the core wire 98 of the annular conductors 10 to 13 and the annular conductor connection end 41 of the relay terminal 40 are electrically and mechanically connected inside the holding parts 31 to 34. Yes. That is, the electrical connection portion between the core wire 98 of the annular conductors 10 to 13 and the annular conductor connection end 41 of the relay terminal 40 is welded in advance by resistance welding, but is disposed inside each holding component 31 to 34. Sealed from the outside. The sealing of the connecting portion can be performed when the holding components 31 to 34 are molded. Thereby, since the electrical connection portion is not exposed to the outside, the electrical connection performance can be maintained.

  First, in FIG. 11, the annular conductors 10 to 13 are held at predetermined intervals by the holding components 31 to 34, and the annular conductor connection end 41 of the relay terminal 40 is connected to the core wire 98 of the neutral phase annular conductor 10. They are electrically and mechanically fixed by fitting and welding. The annular conductor connection end 41 of the relay terminal 40 is electrically fixed to the core wire 98 of the annular conductor 10. The core wire 98 and the annular conductor connection end 41 are sealed by the holding component 31.

For example, an enameled wire is preferably used as the annular conductor 10 as shown in FIG. The enameled wire has a core wire 98 and an electrical insulating coating 99 coated on the outer periphery of the core wire 98. The core wire 98 is, for example, a copper wire having a circular cross section, and the electrical insulation coating 99 is an enamel layer. As shown in FIG. 11, the portion of the electrical insulation coating 99 to which the annular conductor connection end 41 of the relay terminal 40 of the annular conductor 10 is connected is removed from the core wire 98, and the core wire 98 is partially exposed.

  Next, in FIG. 12, the annular conductors 10 to 13 are held at predetermined intervals by the holding components 31 to 34, and the annular conductor connection end 41 of the relay terminal 40 is connected to the core wire 98 of the U-phase annular conductor 11. They are electrically and mechanically fixed by fitting and welding. The annular conductor connection end 41 of the relay terminal 40 is electrically fixed to the core wire 98 of the annular conductor 10 by welding. The core wire 98 and the annular conductor connection end 41 are sealed by the holding component 32.

For example, an enameled wire is preferably used as the annular conductor 11 as shown in FIG. The enameled wire has a core wire 98 and an electrical insulating coating 99 coated on the outer periphery of the core wire 98. The core wire 98 is, for example, a copper wire having a circular cross section, and the electrical insulation coating 99 is an enamel layer.
As shown in FIG. 12, the portion of the electrical insulation coating 99 to which the annular conductor connection end 41 of the relay terminal 40 of the annular conductor 11 is connected is removed from the core wire 98, and the core wire 98 is partially exposed.

  Next, in FIG. 13, the annular conductors 10 to 13 are held at predetermined intervals by the holding components 31 to 34, and the annular conductor connection end 41 of the relay terminal 40 is connected to the core wire 98 of the V-phase annular conductor 12. They are electrically and mechanically fixed by fitting and welding. However, unlike the example of FIGS. 11 and 12, the relay terminal 40 is used upside down.

  The annular conductor connection end 41 of the relay terminal 40 is electrically fixed to the core wire 98 of the annular conductor 12. The coil connection end 42 of the relay terminal 40 is electrically and mechanically fixed to the connection protrusion 150 of the coil by welding. The core wire 98 and the coil connection end 42 are sealed by the holding component 33.

For example, an enameled wire is preferably used as the annular conductor 12 as shown in FIG. The enameled wire has a core wire 98 and an electrical insulating coating 99 coated on the outer periphery of the core wire 98. The core wire 98 is, for example, a copper wire having a circular cross section, and the electrical insulation coating 99 is an enamel layer.
As shown in FIG. 13, the portion of the electrical insulation coating 99 to which the annular conductor connection end 41 of the relay terminal 40 of the annular conductor 11 is connected is removed from the core wire 98, and the core wire 98 is partially exposed.

  Finally, in FIG. 14, the annular conductors 10 to 13 are held at predetermined intervals by the holding parts 31 to 34, and the annular conductor connection end 41 of the relay terminal 40 is connected to the core wire 98 of the W-phase annular conductor 13. They are electrically and mechanically fixed by fitting and welding. The core wire 98 and the coil connection end 42 are sealed by the holding component 34.

The annular conductor connection end 41 of the relay terminal 40 is electrically fixed to the core wire 98 of the annular conductor 13. The coil connection end 42 of the relay terminal 40 is electrically and mechanically fixed to the coil connection projection 150 by welding.
For example, an enameled wire is preferably used as the annular conductor 13 as shown in FIG. The enameled wire has a core wire 98 and an electrical insulating coating 99 coated on the outer periphery of the core wire 98. The core wire 98 is, for example, a copper wire having a circular cross section, and the electrical insulation coating 99 is an enamel layer.
As shown in FIG. 14, the portion of the electrical insulation coating 99 to which the annular conductor connection end 41 of the relay terminal 40 of the annular conductor 13 is connected is removed from the core wire 98, and the core wire 98 is partially exposed.

  The holding parts 31 to 34 can ensure electrical insulation between the annular conductors 10, 11, 12, 13 and the coil connection end 42 of the relay terminal 40 and the connection projection 150 of the coil. Even if the annular conductor connecting end 41 of the relay terminal 40 is directly and mechanically connected to the exposed core wire 98 from which the electrical insulating film 99 is removed, the holding components 31 to 34 are connected to the core wire 98. And an electrical insulation state between the adjacent annular conductors can be secured.

  Next, with reference to FIG. 15 and FIG. 16, the structural example of the motor 300 in which the concentrated power distribution component 1 is used is demonstrated. The motor 300 includes a stator 200 and a rotor 201.

  The rotor 201 has a plurality of driving magnets. Due to the interaction between the magnetic force of the magnet of the rotor 201 and the magnetic flux generated by the U-phase coil 100, the V-phase coil 101, and the W-phase coil 102 of the stator 200, the rotor 201 has a central axis CL with respect to the stator 200. It is designed to rotate around the center.

  The stator 200 has a coil bobbin 220 and a stator core 221. The coil bobbin 220 has a ring-shaped accommodation portion 230 along the circumferential direction. The accommodating portion 230 is located outside the coils 100, 101, and 102, and is a portion that accommodates the concentrated power distribution component 1 shown in FIG.

  A portion P1 in FIG. 15 shows a connection state between the annular conductor of the holding component 31 shown in FIG. 11 and the coil connection projection 150, and a portion P2 in FIG. 15 shows the annular conductor of the holding component 32 shown in FIG. The connection state with the coil connection protrusion 150 is shown. 16 shows the connection state between the annular conductor of the holding component 33 shown in FIG. 13 and the coil connection projection 150, and in the portion P4 of FIG. 16, the annular conductor of the holding component 34 shown in FIG. The connection state with the coil connection protrusion 150 is shown.

Next, a manufacturing example of the concentrated power distribution component 1 will be briefly described.
A plurality of holding parts are molded separately for each of the four linear annular conductors 10 to 13. Each of the annular conductors 10 to 13 in which a plurality of holding parts are set is bent into a circular shape as shown in FIG. 2 and stacked on a concentric circle with the central axis CL as the center as shown in FIG. After the annular conductors 11 to 13 are bent into an annular shape as described above, both end portions 10C of the neutral-phase annular conductor 10 are connected.

  One end and the other end of the U-phase annular conductor 11, the V-phase annular conductor 12, and the W-phase annular conductor 13 are connected to power supply terminals 11D, 12D, and 13D, respectively. Thereby, the annular concentrated power distribution component 1 as shown in FIG. 1 is obtained.

  The annular concentrated power distribution component 1 shown in FIG. 1 is set by being inserted along the DN direction into the accommodating portion 230 of the coil bobbin 220 as shown in FIGS. 15 and 16. When the centralized power distribution component 1 is set in the housing portion 230, the coil connection ends 42 of the relay terminals 40 are positioned on both sides of the coil connection projection 150 as shown in FIGS. 11 to 14.

  Thus, the U-phase annular conductor 11, the V-phase annular conductor 12, and the W-phase annular conductor 13 are electrically connected to the one end portions of the coils 100, 101, 102 via the relay terminals 40, respectively. Mechanically connected. Further, the neutral-phase annular conductor 10 is electrically and mechanically connected to the other end portions of the coils 100, 101, 102 via the relay terminals 40.

  In the embodiment of the present invention, as shown in FIGS. 15 and 16, the height F of the coil connection projection 150 with respect to the bottom 229 of the coil bobbin 220 is the extraction height of the coils 100, 101, 102. The height F can be made constant at any position of the portions P1 and P2 in FIG. 15 and the portions P3 and P4 in FIG. The reason is that even if the height F of the coil connection projection 150 is the same, the region where the coil connection end 42 of the relay terminal 40 corresponding to the coil connection projection 150 can be welded and fixed without fail is shown in FIG. This is because it is provided with a margin along the 9 J direction.

  Thereby, although each of the annular conductors 10, 11, 12, 13 has a structure in which the annular conductors 10, 11, 12, 13 are arranged at intervals in the central axis CL direction, each of the annular conductors 10, 11, 12, 13 uses the relay terminal 40. Thus, it can be easily electrically and mechanically connected to the connection protrusion 150 of the coil having the height F at the same position.

Since the core wire 98 of each annular conductor 10, 11, 12, 13 is covered in advance with an electrical insulating film 99 over the entire length of the core wire 98, a holding component is molded to each annular conductor 10, 11, 12, 13. It is possible to prevent the core wire 98 from being oxidized before being molded and bent into a circular shape.
By the way, FIG. 17 is a figure explaining the distance (distance of an electric wire exposure part) L of the exposed part of a cyclic | annular conductor.

The number of motor coils is n, the diameter of the concentrated power distribution component is Dmm as shown in FIG. 17 (A), and the shortest distance between the annular conductors is hmm as shown in FIG. 17 (B). When the distance between the centers of the parts is Pmm and the distance of the exposed portion of the annular conductor (the distance between the end faces between adjacent holding parts) is Lmm, the creepage distance X shown in FIG. I can express.
Creepage distance X = h + (P-2L) / 2> 2 mm... Formula 1
Further, the center-to-center distance P between adjacent holding parts can be expressed by πD / n.
Therefore, when this equation 1 is transformed, the distance L of the exposed portion of the annular conductor is
h + πD / 2n-2> L
Will be satisfied.

  The grounds for making the creepage distance X larger than 2 mm are as follows. In other words, the interphase voltage of recent HEV (hybrid vehicle) motors exceeds 500V and may rise to about 1kV in the future, but the creepage distance X that can withstand a potential difference of 1kV is about 14mm according to JIS standards. In the case where the cleanliness of the component surface is stable as in the case of the concentrated power distribution component of the present invention, 2 mm is sufficient even if the variation is taken into consideration.

A centralized power distribution component 1 according to an embodiment of the present invention includes a plurality of annular conductors 10, 11, 12, 13 and a plurality of relay terminals 40 that are separately connected to the plurality of annular conductors by electrical connection portions. Electrically insulating electrically fixed to the plurality of annular conductors for holding the annular conductor in a state where the plurality of annular conductors are laminated along the central axis direction of the plurality of annular conductors. A plurality of holding parts 31 to 34 are provided, and electrical connection portions of the annular conductors 10, 11, 12, and 13 and the relay terminal 40 are arranged in the holding parts 31 to 34.
Thus, the length of the annular conductor can be shortened, and the concentrated power distribution component can be easily manufactured while ensuring the electrical insulation between the adjacent annular conductors, and the concentrated power distribution component can be downsized. By downsizing the centralized power distribution component, the motor can be downsized.

  In the concentrated power distribution component 1 according to the embodiment of the present invention, the annular conductors 10, 11, 12, and 13 are formed by bending a linear conductor. Thereby, since the annular conductor is not formed by punching the copper plate, the remaining portion generated after the copper plate is punched does not occur, and the material cost and the processing cost can be reduced.

  The plurality of annular conductors 10, 11, 12, and 13 are formed by bending a linear conductor, and the plurality of holding portions 31 to 34 are formed on the respective annular conductors 10, 11, 12, and 13 by molding a resin. There are exposed portions 600 to 603 of the annular conductor between the plurality of holding parts that are formed separately for each annular conductor, and these exposed portions 600 to 603 are adjacent annular conductors. The holding parts are stacked so as not to be adjacent to the exposed portion of the. Thereby, the insulation creepage distance for the electrical insulation between the adjacent exposed parts 600-603 can be earned.

  In the centralized power distribution component 1 according to the embodiment of the present invention, the annular conductors 10, 11, 12, and 13 are preferably conductors having an insulating layer, for example, enamel wires, and the relay terminals 40 and the core wires 98 are electrically connected by welding. Connected mechanically and mechanically. Thereby, the oxidation of the core wire 98 can be prevented, and the relay terminal 40 can stably perform welding on the core wire 98 in which the oxidation is prevented.

  In the centralized power distribution component 1 according to the embodiment of the present invention, the inner diameters of the plurality of annular conductors 10 to 13 are substantially the same, there is no portion that is bent and protruded inward, and a circular space is formed inside the plurality of annular conductors. Is formed. Accordingly, it is sufficient to prepare an annular conductor having the same length, the length of the linear conductor constituting the annular conductor can be minimized, and the material cost and the processing cost can be reduced. In the embodiment of the present invention, since the annular conductor does not have a bent portion inside, the shape of the annular conductor can be simplified.

  The relay terminal 40 of the centralized power distribution component 1 according to the embodiment of the present invention includes an annular conductor connection end 41 that is electrically connected by being engaged with and welded to the core conductor 98 of the annular conductor, and a connection projection of the stator coil. The coil connection end 42 is electrically connected to 150, and the connection portion 43 connects the coil connection end 42 and the annular conductor connection end 41. Accordingly, the core conductor 98 of the annular conductor and the connection projection 150 of the coil can be easily and mechanically connected simply by using the relay terminal 40.

  In the concentrated power distribution component 1 according to the embodiment of the present invention, the coil connection end 42 of the relay terminal 40 has a region that can be connected to the connection projection 150 of the coil along the direction of the center axis CL of the annular conductor. Thereby, although the position of each cyclic | annular conductor 10-13 differs along the central axis CL, it is only necessary to use one kind of relay terminal 40, the kind of parts can be reduced, and material cost and processing cost can be reduced.

In the embodiment of the present invention, the connecting portion in which the core wire of the relay terminal and the annular conductor is electrically mechanically connected by resistance welding is sealed by at least a resin mold, and the portion of the annular conductor that is not welded The non-molded part (exposed part of the annular conductor) exists, and the non-molded part of a certain phase is necessarily adjacent to the holding part (molded part) of the adjacent annular conductor. Thereby, the creeping distance for electrical insulation of the non-molded portion (exposed portion of the annular conductor) is obtained. That is, although there is an exposed portion of the annular conductor, unlike a conventional structure, a creeping distance between adjacent annular conductors can be increased, and insulation between phases can be ensured.
The bottom surface of the concentrated power distribution component 1, also called a bus ring, is in contact with the stator core 221, but the lowermost W-phase annular conductor 13 has the holding component 34, so that electrical insulation can be reliably obtained. Can do.

  Since the holding parts 31 to 34 in each annular conductor are arranged at intervals, the linear expansion coefficient of the material of the holding part and the annular conductor are compared with the case where the holding part is formed continuously with the annular conductor. Stress concentration and cracking do not occur due to differences in the linear expansion coefficients of the materials.

It is conceivable to mold a plurality of annular conductors in a batch, but with this method, the plurality of annular conductors are inserted and held in a temporary holding jig so that the plurality of annular conductors are mutually connected. Since it is necessary to insert the mold into a large mold and mold it, the work is troublesome and a large mold is necessary.
However, in the embodiment of the present invention, since the holding component can be molded for each annular conductor, the operation is simple, a small mold can be used, and the cost can be reduced.
By the way, this invention is not limited to the said embodiment, A various modified example is employable.

  As each annular conductor of the concentrated power distribution component described above, an enameled wire is used as an example of a conductor having an insulating layer. However, the present invention is not limited to this, and each annular conductor includes a type in which a bare wire is covered with an insulation tube, a type in which Teflon (registered trademark) is covered in the wire manufacturing stage, and a type in which an enamel wire is covered with an insulation tube. The material of the core wire and the electrical insulation coating is not particularly limited as long as it is a structure having a conductive metal core wire and an electrical insulation coating for covering the core wire.

  In the illustrated example, the holding members 31, 32, 33, and 34 are separately molded with respect to the annular conductors 10 to 13, respectively. However, it may be molded so that it is slightly connected and integrated. Similarly, the adjacent holding members 32, 32, the adjacent holding members 33, 33, and the adjacent holding members 34, 34 may be slightly connected to each other if not completely integrated. It may be molded.

  For example, the annular conductors 10, 11, 12, and 13 of the neutral phase, the U phase, the V phase, and the W phase have the same diameter, but if necessary, the annular conductors 11, 12, and 13 and the annular conductor 10 The thickness may be different. Further, the annular conductor 10 may be provided at a position different from that of the other annular conductors 11, 12, 13, and the concentrated power distribution component 1 may be configured by the annular conductors 11, 12, 13.

  The annular conductor is a conductor having a circular cross section, but is not limited thereto, and may have another shape, for example, a rectangular cross section.

It is a perspective view which shows preferable embodiment of the concentrated power distribution components of this invention. It is a perspective view which shows a mode that the annular conductor of the U phase of the concentrated distribution component of FIG. 1, V phase, and W phase, and the annular conductor of the neutral phase were decomposed | disassembled. It is a figure which shows the example of a connection of the annular conductor of U phase, V phase, and W phase, the annular conductor of a neutral phase, and a coil. It is a perspective view which expands and shows a part of annular conductor of a neutral phase. It is a perspective view which expands and shows a part of U-phase annular conductor. It is a perspective view which expands and shows a part of annular conductor of V phase. It is a perspective view which expands and shows a part of annular conductor of W phase. It is a side view which shows the mutual positional relationship of the cyclic | annular conductor of a neutral phase, U phase, V phase, and W phase, and holding | maintenance components. It is a perspective view which shows the annular conductor electrically and mechanically connected to the relay terminal and this relay terminal. It is a figure which shows the example which has connected the relay terminal and the connection projection part of the coil electrically and mechanically. It is a figure which shows the state by which the core wire of the annular conductor of the neutral phase, and the relay terminal were connected. It is a figure which shows the state by which the core wire and relay terminal of the U-phase annular conductor were connected. It is a figure which shows the state by which the core wire and relay terminal of the V-phase annular conductor were connected. It is a figure which shows the state by which the core wire of the annular conductor of W phase and the relay terminal were connected. It is a figure which shows the example of a cross-section of a motor. It is a figure which shows the example of a cross-section of a motor. It is a figure explaining the distance L of the exposed part of an annular conductor.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Concentrated power distribution component 10 Ring conductor corresponding to neutral phase 11 Ring conductor corresponding to U phase 12 Ring conductor corresponding to V phase 13 Ring conductor corresponding to W phase 31-34 Holding parts 40 Relay terminal 41 Ring conductor connection end 42 Coil connection end 98 Core wire 99 Electrical insulation coating 150 Coil connection projection 200 Stator 201 Rotor 230 Concentrated wiring component housing 300 Motor

Claims (9)

A centralized power distribution component disposed on the stator of the motor and electrically connected to the coil of the stator,
A plurality of annular conductors;
A plurality of relay terminals respectively connected to the plurality of annular conductors by electrical connection portions;
Electrical insulation that is mechanically fixed to the plurality of annular conductors for holding the annular conductors in a state where the plurality of annular conductors are laminated along the central axis direction of the plurality of annular conductors. Having a plurality of holding parts;
With
The centralized power distribution component, wherein the electrical connection portion between the annular conductor and the relay terminal is disposed in the holding component. The plurality of annular conductors are formed by bending a linear conductor, and the plurality of holding components are formed for each of the annular conductors by molding a resin,
There is an exposed portion of the annular conductor between the plurality of holding parts set for each annular conductor, and the exposed portion of the annular conductor is not adjacent to the exposed portion of the adjacent annular conductor. The centralized power distribution component according to claim 1, wherein the holding components are stacked. When the number of coils of the motor is n, the diameter of the concentrated power distribution component is Dmm, and the shortest distance between the annular conductors is hmm, the distance L of the exposed portion of the annular conductor is:
h + πD / 2n-2> L
The concentrated power distribution component according to claim 2, wherein:   The said annular conductor has a core wire and the insulating layer which coat | covers this core wire, The said relay terminal and the said core wire are electrically and mechanically connected by welding, The Claim 2 or Claim 3 characterized by the above-mentioned. The centralized power distribution component described.   5. The inner diameter of each of the plurality of annular conductors is substantially the same, and a circular space is formed inside the plurality of annular conductors. Centralized power distribution parts. The relay terminal is
An annular conductor connecting end electrically connected by engaging with the core wire of the annular conductor;
A coil connection end electrically connected to a connection protrusion of the stator coil;
The centralized power distribution component according to claim 4 or 5, wherein   The concentrated power distribution according to claim 6, wherein the coil connection end of the relay terminal has a region that can be connected to a connection projection of the coil along a central axis direction of the annular conductor. parts.   The plurality of annular conductors include at least a U-phase annular conductor, a V-phase annular conductor, and a W-phase annular conductor of a three-phase brushless motor. The centralized power distribution component described.   The concentrated power distribution component according to claim 8, wherein the plurality of annular conductors further include a neutral phase annular conductor.

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