JP2004194367A - Rotary electric machine and wiring member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem of a conventional large-sized rotary electric machine requiring a large current that the manufacture of a mold or its design change becomes difficult, and that the carriage and the facility of assembly of parts becomes bad if a wiring processing member where a conductor is molded integrally is manufactured. <P>SOLUTION: This rotary electric machine is equipped with coils which consist of conductors and are wound, a plurality of wiring blocks 1 which consist of insulators where supports for supporting conductors 5 connected electrically with the coils are arranged, a wiring member 2 where the plural wiring blocks are coupled with one another, a stator core which consists of a magnetic substance, and a rotor which is supported rotatably via a gap from the stator core. The rotating electric machine is structuralized such that a wiring processing member is divided into a plurality of blocks 1 and a conductor is set to it in the axial direction of the stator, whereby the enlargement of the parts can be avoided, and the carriage and the assembly become easy. The manufacture of the parts becomes easy, too. Moreover, a mold becomes small, and the replacement of the mold and the change of design by model change become easy. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a terminal wiring structure of a stator of a rotating electric machine (electric motor and generator).
[0002]
[Prior art]
An example of a conventional terminal wiring structure of a stator of a rotating electric machine is disclosed in Japanese Patent Application Laid-Open No. 7-245897 (hereinafter referred to as Patent Document 1).
[0003]
On the other hand, in the case of a large rotating electric machine to which a higher voltage is applied, a method as described in Japanese Patent Application Laid-Open No. 6-225492 (hereinafter referred to as Patent Document 2) is mainly used. In the stator disclosed in Patent Literature 2, windings are applied to a stator core so as to be distributed over a plurality of magnetic pole teeth. Since the current flowing through the circuit is large, the required conductor cross-sectional area cannot be secured on the printed wiring board. For this reason, an insulating tube is inserted into the lead wire connecting wire and the neutral wire connecting wire drawn from the coil, and the upper end of the coil end is routed to directly connect the ends. An insulating tube having a larger diameter is inserted outside the connecting portion to ensure insulation between different phases. Finally, these terminal wires are arranged on the coil end, and are fixed to the upper surface using a racing thread.
[0004]
However, such a terminal structure is difficult to automate and has very poor productivity. For this reason, in recent years, a conductor having a large cross-sectional area (a part or an electric wire punched out by pressing) having a large cross-sectional area is resin-molded as disclosed in Japanese Patent Application Laid-Open No. 2001-103700 (hereinafter, referred to as Patent Document 3) to form a ring-shaped circuit inside. There is also a method of arranging the wiring processing member at the end of the stator core. Inside the wiring processing member, an electric circuit is formed by the embedded conductor, and a plurality of coil connection portions and input line connection portions connected to the electric circuit protrude outside the wiring processing member.
[0005]
[Patent Document 1]
JP-A-7-245897 [Patent Document 2]
Japanese Patent Application Laid-Open No. H6-225491 [Patent Document 3]
JP 2001-103700 A
[Problems to be solved by the invention]
The terminal wiring structure using a printed wiring board described in Patent Document 1 is intended for a small rotating electric machine of several hundred W or less, and cannot be used for a rotating electric machine larger than this. This is because the required current cross section cannot be ensured by printing of a printed circuit because of a large flowing current (for example, with a motor of several kW, the maximum current is several hundred Arms, and the required conductor cross section is 8 mm ^2). There are some examples).
[0007]
For this reason, terminal wiring processing by hand is widely used for large rotating electric machines as in Patent Document 2. In recent years, in order to improve poor workability, in recent years, a ring-shaped terminal wiring member in which a conductor ring or a wire having a large cross-sectional area is resin-molded and only a connection portion protrudes outward as in Patent Document 3 is disclosed. However, such a ring-shaped part with a buried conductor has the following problems when the rotating electric machine is enlarged (increased in diameter) in response to an increase in torque and a reduction in thickness.
(1) The components become large, making it difficult to transport and assemble with other components.
(2) Since the type is large, it is difficult to change the type or change the design.
(3) Due to the difference in the coefficient of thermal expansion between the conductor and the resin, the resin portion is broken by repeated heat generation and cooling.
[0008]
An object of the present invention is to provide a terminal wiring structure that improves the productivity and reliability of a product for a large rotating electric machine through which a large current flows.
[0009]
[Means for Solving the Problems]
One feature of the present invention is that a rotating electric machine has a plurality of wiring blocks made of a conductor, and a plurality of wiring blocks made of an insulator in which a support portion supporting a conductor electrically connected to the coil is arranged. And a wiring member to which a plurality of wiring blocks are connected, a stator core made of a magnetic material, and a rotor rotatably supported via a gap with the stator core. .
[0010]
Further, another feature of the present invention is that the rotating electric machine is formed of a conductor and a wound coil, and a substantially ring-shaped insulator made of an insulator in which a supporting portion for supporting a conductor electrically connected to the coil is disposed. A wiring member, a stator core made of a magnetic material, and a rotor rotatably supported via a gap between the stator core and the gap are provided, and the supporting portion has a hook-like portion for supporting the conductor. It is in.
[0011]
Another feature of the present invention is that the wiring member includes a plurality of substantially arc-shaped wiring blocks having a support portion made of an insulator supporting the conductor, and each of the wiring blocks has an end portion. And a connecting portion for connecting the wiring blocks.
[0012]
The other features of the present invention are as described in the claims of the present application.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 7 shows the terminal wiring structure of the stator of the rotating electric machine of Comparative Example 1. FIG. 7 shows an example of a stator of a three-phase synchronous motor. The stator core 15 incorporates twelve coils (hidden beneath the substrate 20) wound around the respective magnetic pole teeth. A total of 24 terminal wires 18 from each coil are cut to a predetermined length, and the coating at the end is peeled off using a rotary cutter or the like. Then, a substrate 20 on which the terminal wiring is printed as a circuit wiring pattern 19 is positioned and arranged on the coil end, and each terminal wire 18 is bent on the substrate and soldered to the wiring pattern 19. The terminal wiring structure of FIG. 7 is suitable mainly for a small rotating electric machine of several hundred W or less. A substantially cylindrical rotor is rotatably supported by a rotation shaft inside the stator core 15 via a gap. The mainstream of the rotor is a generator in which teeth are provided on a substantially cylindrical magnetic body and a field coil is wound around the teeth. An electric current is applied to the field coil, and a rotating magnetic field is generated in the stator core by the rotation of the rotor, so that an AC voltage is induced in the coil wound around the stator core. Further, in the case of an electric motor, there are a rotor having a cage type conductor, a rotor having a permanent magnet disposed therein, and the like. A rotating magnetic field is generated in a gap between the rotors, and an electromagnetic force is generated in the rotor.
[0014]
FIG. 8 shows the structure of the rotating machine of Comparative Example 2. The method as shown in FIG. 8 is suitable for a large rotating electric machine to which a high voltage is applied. FIG. 8 shows an example of a stator of a three-phase induction motor. The stator core 15 is provided with windings distributed over a plurality of magnetic pole teeth. Since the current flowing through the circuit is large, the required conductor cross-sectional area cannot be secured on the printed wiring board. For this reason, an insulating tube is inserted into the lead wire 21 and the neutral wire 22 drawn from the coil, and the upper end of the coil end 23 is routed to connect the ends directly. An insulating tube having a larger diameter is inserted into the connecting portion 24 outside to secure insulation between different phases. Finally, these terminal wires are arranged on the coil end 23, and are fixed to the upper surface using the racing yarn 25.
[0015]
FIG. 9 shows a wiring member of Comparative Example 3. The terminal structure as in Comparative Example 2 is difficult to automate and has very poor productivity. For this reason, in recent years, as shown in FIG. 9, a conductor having a large cross-sectional area (a part or an electric wire punched out by pressing) is resin-molded, and a ring-shaped wiring member 26 having a circuit formed therein is attached to the end of the stator core. There are also ways to arrange them. Inside the wiring member, an electric circuit is formed by the embedded conductor, and a plurality of coil connection portions 27 and input wire connection portions 28 connected to the conductor protrude outside the wiring member. The connection between the coil terminal and the connection portion is made by fusing, swaging using terminals, or the like. First, a first embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, an arc-shaped block 1 is formed from a resin (for example, LCP or PPS) molded article, and a plurality of these are combined to form a ring-shaped wiring processing member 2. For example, if a plurality of grooves 3 for inserting and fixing a conductor are provided on the axial end surface of the block 1 and a hook-shaped projection 4 is formed in the groove, the conductor 5 is fixed simply by inserting the groove into the groove. be able to. The conductor 5 is formed by integrally forming a connection portion by press molding or by welding a terminal of another component to an electric wire. The connection portion 6 is put out of the groove, and these and a terminal of a coil (not shown) are used. Are connected to form an electric circuit. Alternatively, as shown in FIG. 2, a plurality of portal-shaped projections 7 for fixing a conductor are provided on the axial end surface of the block 1 and a conductor 8 with a coating is inserted and fixed thereto, or a conductor without a coating is inserted. After fixing, the whole may be subjected to insulation coating (for example, insulation by powder coating). In any structure, by dividing the wiring processing member into small blocks, it is easy to transport and assemble the components. In addition, when there are many models, it is possible to easily carry out the process of changing the mold by changing the model, and it is also possible to quickly perform a design change or a new design at a low price. The depression 29 provided at the end of the block 1 is shaped to engage with a projection (not shown) provided at the opposite end of the block 1 and is used for positioning the blocks.
[0016]
Next, a second embodiment of the present invention will be described with reference to FIG. In the second embodiment, an arc-shaped groove 3 is provided concentrically on the axial end surface of the block 1 of the wiring processing member, and a conductor 5 for forming an electric circuit is inserted into this groove. A pair of fitting portions 9 and 10 are provided at both ends in the circumferential direction of each block, in which partition walls forming grooves are divided in parallel to the wall surface. By joining the mating portions 9 and 10 of the adjacent blocks, the blocks are connected in the circumferential direction to form the ring-shaped wiring processing member 2. As the conductor 5, a connection part integrally formed by pressing or a terminal obtained by welding a terminal of another component to an electric wire is used, and the conductor 5 is fixed to the block 1 by a hook-shaped projection 4 provided in a groove. Then, the connecting portion 6 protruding outside the groove of the wiring processing member 2 is connected to a terminal (not shown) of the coil. Here, each block is connected by a pair of fitting portions 9 and 10, but can be slightly moved in the circumferential direction. Thus, when the conductor 5 inserted therein generates heat, the displacement of the deformation due to the difference in the expansion coefficient between the conductor and the resin is absorbed by the fitting portion, and it is possible to prevent the resin portion from being damaged due to the application of stress. In addition, the structure of the male and female mating portions of this embodiment is different from the case where the wiring processing member 2 is simply divided in that the creepage distance between adjacent conductors of different phases (along the surface of the insulator). (Distance between conductors) can be increased, and insulation performance can be ensured. As a result, a conductor without a covering can be used, and material cost can be reduced, and the work of removing the covering at the time of connection with the coil terminal is not required.
[0017]
Next, a third embodiment of the present invention will be described with reference to FIGS. In the third embodiment, a female fitting portion 11 is provided on the inner peripheral surface of the block 1 of the second embodiment, and a male fitting portion 13 is provided on the outer peripheral surface of the bobbin 12 of the stator coil. Is attached to the end face of the stator core 15 from the axial direction. Bobbin 12 is fixed to stator core 15. The male fitting portion 13 can be easily inserted into the female fitting portion 11 by slightly expanding the fitting portion in the circumferential direction and slightly expanding the inner diameter of the ring-shaped wiring member. After the insertion, the fitting portion between the blocks is completely fitted in the circumferential direction, so that the wiring processing member is fixed in the axial direction of the stator core 15 by the bobbin 12. Alternatively, a hook-shaped protrusion 14 is provided on the outer peripheral surface of the bobbin 12 of the stator coil as shown in FIG. 5 without providing the fitting portion on the wiring processing member side, and the stator core 15 is assembled in a ring shape from the axial direction. The wiring processing member 2 may be assembled, and the hook-shaped protrusion 14 may be hooked on an end surface of the wiring processing member 2 by elastic deformation to fix them.
[0018]
The block 1 is provided with a female-type fitting portion 30 in the axial direction, and the bobbin 12 is provided with a male-type fitting portion 31. By engaging the fitting portion 30 with the fitting portion 31, 2 is attached to the stator core 15 by the bobbin 12. And can be fixed in the circumferential direction via.
[0019]
Next, a fourth embodiment of the present invention will be described with reference to FIG. In the fourth embodiment, in the wiring processing member of the third embodiment, a plurality of L-shaped members 16 made of, for example, Al having high thermal conductivity are embedded in the block 1 of the wiring processing member and integrally formed. The member 16 contacts the outer peripheral surface of the coil end of the bobbin 12 and the end surface of the stator core 15. As a result, heat generated in the stator coil 17 is transmitted through the path from the coil end → the coil end bobbin 12 → the L-shaped member 16 → the stator core 15, so that heat can be released from the stator core of the rotating electric machine to the outside. .
[0020]
【The invention's effect】
For the rotating electric machine, the wiring processing member is divided into a plurality of blocks, and the conductor is assembled from the axial direction of the stator. Therefore, it is possible to avoid an increase in the size of components and to facilitate transport and assembly. In addition, the size of the mold is reduced, and it is easy to change the mold and change the design by changing the model.
[Brief description of the drawings]
FIG. 1 is a wiring processing member according to a first embodiment of the present invention.
FIG. 2 is a modified example of the wiring processing member according to the first embodiment of the present invention.
FIG. 3 is a wiring processing member according to a second embodiment of the present invention.
FIG. 4 is a wiring processing member according to a third embodiment of the present invention.
FIG. 5 is a modified example of the wiring processing member according to the third embodiment of the present invention.
FIG. 6 is a wiring processing member according to a fourth embodiment of the present invention.
FIG. 7 is a rotating electric machine of Comparative Example 1 using a printed wiring board for terminal wiring processing.
FIG. 8 is a rotating electric machine of Comparative Example 2 in which an electric wire coming out of a coil is routed and connected on a coil end.
FIG. 9 is a rotating electric machine of Comparative Example 3 using a wiring ring integrally molded for terminal wiring processing.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Block of wiring processing member, 2 ... Wiring processing member assembled in a ring shape, 3 ... Insertion groove of conductor, 4 ... Hook-shaped projection, 5 ... Conductor, 6 ... Connection part, 7 ... Gate-shaped projection, 8 ... Covering With conductor, 9: fitting part on the right end face in the block circumferential direction, 10 ... fitting part on the left end face in the block circumferential direction, 11 ... female fitting part provided on the inner circumferential face of the block, 12 ... coil bobbin, 13 ... bobbin outer circumference of the coil end Male fitting portion provided on the surface, 14 hook-shaped projections provided on the outer peripheral surface of the bobbin, 15 stator core, 16 member of high thermal conductivity, 17 stator coil, 18 terminal wire of coil, 19 ... Printed wiring, 20: Printed wiring board, 21: Wire for connecting lead wire, 22: Wire for connecting neutral point, 23: Coil end, 24: Connection part, 25: Racing thread, 26: Integrated ring-shaped wiring processing Member, 27 ... coil terminal connection part, 2 ... input line connection.

Claims (12)

A stator core made of a magnetic material,
A coil made of a conductor and wound on the stator core or bobbin,
A plurality of wiring blocks made of an insulator in which a support portion for supporting the coil or a conductor electrically connected to the coil is arranged;
A wiring member to which the plurality of wiring blocks are connected,
A rotating electric machine comprising: the stator core; and a rotor rotatably supported via a gap. A stator core made of a magnetic material,
A coil made of a conductor and wound on the stator core or the bobbin;
A substantially ring-shaped wiring member made of an insulator in which a support portion that supports a conductor electrically connected to the coil is disposed;
The stator core and a rotor rotatably supported via a gap,
A rotating electric machine, wherein a supporting portion for supporting the conductor has a groove shape. 3. The rotating electric machine according to claim 2, wherein the support portion supporting the conductor has a hook-shaped portion. Consisting of a plurality of substantially arc-shaped wiring blocks having a support portion made of an insulator supporting the conductor,
A wiring member, comprising: a connecting portion for connecting each wiring block to an end of the plurality of wiring blocks. 2. The wiring member according to claim 1, wherein a fitting portion for connecting each wiring block is arranged at an end of the wiring block. A coil made of a conductor and wound;
A substantially ring-shaped wiring member made of an insulator in which a support portion that supports a conductor electrically connected to the coil is disposed;
A stator core made of a magnetic material,
The stator core and a rotor rotatably supported via a gap,
A rotating electric machine, wherein the support portion arranged on the wiring block has a gate shape. In claim 1, the coil is wound around the bobbin,
The bobbin is provided with a concave portion or a convex portion,
The wiring member is provided with a concave portion or a convex portion,
A rotating electric machine, wherein a protrusion or a recess provided on the bobbin is fitted to a protrusion or a recess provided on the wiring member. In claim 1, the coil is wound around a bobbin,
A projection is provided on the outer peripheral surface of the bobbin,
The rotating electric machine, wherein the wiring member is supported by a protrusion provided on the bobbin. In claim 1, the coil is wound around a bobbin,
A rotating electric machine, wherein a member having a higher thermal conductivity than the wiring member is disposed between the bobbin and the wiring member. In claim 1, the coil is wound around a bobbin,
A rotating electric machine, wherein a member having higher thermal conductivity than the wiring member is disposed between the bobbin and the stator core. 10. The rotating electric machine according to claim 9, wherein the member having a higher thermal conductivity than the wiring member includes aluminum. 11. The rotating electric machine according to claim 10, wherein the member having a higher thermal conductivity than the wiring member includes aluminum.

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