JP4007176B2 - Rotating electric machine and wiring member - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a terminal wiring structure of a stator of a rotating electrical machine (an electric motor and a 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 Laid-Open No. 7-245897 (hereinafter referred to as Patent Document 1).
[0003]
On the other hand, for large rotating electrical machines that require a higher voltage than this, a method as described in JP-A-6-225491 (hereinafter referred to as Patent Document 2) is the mainstream. In the device described in Patent Document 2, the stator core is provided with windings distributed over a plurality of magnetic pole teeth. Since the current flowing through the circuit is large, the necessary conductor cross-sectional area cannot be ensured in the printed wiring board. For this reason, an insulating tube is inserted into the lead wire connecting wire and the neutral point connecting wire drawn out from the coil, and the upper end of the coil end is routed to directly connect the end portions. A thicker insulating tube is inserted outside the connecting portion to ensure insulation between different phases. And finally, those terminal wirings are arranged on the coil end and fixed to the upper surface using a racing yarn.
[0004]
However, such a terminal structure is difficult to automate and is very unproductive. For this reason, in recent years, as in JP-A-2001-103700 (hereinafter referred to as Patent Document 3), a conductor having a large cross-sectional area (a stamped part or electric wire by pressing) is resin-molded and a circuit is formed inside. A method of arranging the wiring processing member at the end of the stator core is also seen. Inside the wiring processing member, an electric circuit is formed by the embedded conductor, and a plurality of coil connecting portions and input wire connecting portions connected thereto are projected to the outside of the wiring processing member.
[0005]
[Patent Document 1]
JP-A-7-245897 [Patent Document 2]
JP-A-6-225491 [Patent Document 3]
Japanese Patent Laid-Open No. 2001-103700
[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 a large current flows, and a conductor cross-sectional area required for printing cannot be ensured by printing a printed circuit (for example, with a motor of several kW, the maximum current is several hundred Arms and the necessary conductor cross-sectional area is 8 mm ^2. Example)
[0007]
For this reason, terminal wiring processing by manual work is widely used for large rotating electrical machines as disclosed in Patent Document 2. In recent years, in order to improve the workability, a ring-shaped terminal wiring member in which a ring or electric wire of a conductor having a large cross-sectional area is resin-molded and only the connection portion protrudes from the surface as in Patent Document 3 is partially used. Although such a conductor-embedded ring-shaped component is used, the following problems arise when the rotating electrical machine is increased in size (increased in diameter) in response to an increase in torque and a reduction in thickness.
(1) Parts become large, and it becomes difficult to convey and assemble with other parts.
(2) Since the mold is large, it is difficult to change the product type or change the design.
(3) Due to the difference in thermal expansion coefficient between the conductor and the resin, the resin portion is destroyed by repeated heat generation and cooling.
[0008]
The present invention provides a terminal wiring structure that improves the productivity and reliability of a product for a large rotating electrical machine through which a large current flows.
[0009]
[Means for Solving the Problems]
One feature of the present invention is that a rotating electrical machine includes a coil wound with a conductor, and a plurality of wiring blocks made of an insulator in which a support portion that supports the conductor electrically connected to the coil is disposed. And a wiring member to which a plurality of wiring blocks are connected, a stator core made of a magnetic material, and a rotor that is rotatably supported via a stator core and a gap. .
[0010]
Another feature of the present invention is that the rotating electrical machine is formed in a substantially ring shape made of an insulator in which a coil made of a conductor and a support portion for supporting the conductor electrically connected to the coil are arranged. A wiring member, a stator core made of a magnetic material, and a rotor that is rotatably supported through a gap between the stator core and the support, and the support portion has a hook-shaped portion that supports the conductor. There is.
[0011]
Another feature of the present invention is that the wiring member is composed of a plurality of substantially arc-shaped wiring blocks each having a support portion made of an insulator that supports a conductor. In other words, a connecting portion for connecting the wiring blocks is provided.
[0012]
The other features of the present invention are as described in the claims of the present application.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
The terminal wiring structure of the stator of the rotating electrical machine of Comparative Example 1 is shown in FIG. FIG. 7 shows an example of a stator of a three-phase synchronous motor. The stator core 15 incorporates twelve coils (hidden under the substrate 20) wound around the magnetic pole teeth. A total of 24 terminal wires 18 coming out of each coil are cut to a predetermined length, and the coating at the tip is peeled off using a rotary cutter or the like. Then, the substrate 20 on which the terminal wiring is printed as the 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 in FIG. 7 is suitable mainly for a small rotating electrical machine of several hundred watts or less. A substantially cylindrical rotor is rotatably supported on the inner side of the stator core 15 by a rotating shaft through a gap. If the rotor is a generator, the mainstream is that a tooth is provided on a substantially cylindrical magnetic body and a field coil is wound around the tooth. A current is passed through the field coil, and a rotating magnetic field is generated in the stator core by rotating the rotor, and an alternating voltage is induced in the coil wound around the stator core. In addition, in the case of an electric motor, there are a rotor having a squirrel-cage conductor or a permanent magnet, etc., and an alternating current is passed through a coil wound around the stator core to A rotating magnetic field is generated in the 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. For a large rotating electrical machine to which a high voltage is applied, the method as shown in FIG. 8 is suitable. 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 necessary conductor cross-sectional area cannot be ensured in the printed wiring board. For this reason, an insulating tube is inserted into the lead wire connecting electric wire 21 and the neutral point connecting electric wire 22 drawn from the coil, and the upper end of the coil end 23 is routed to connect the end portions directly. A thicker insulating tube is inserted into the connection portion 24 to ensure insulation between different phases. Finally, the terminal wirings are arranged on the coil end 23 and 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 ring-shaped wiring member 26 in which a conductor having a large cross-sectional area (a punched part or electric wire by pressing) is resin-molded and a circuit is formed therein is attached to the end of the stator core. You can also see how to place them. Inside the wiring member, an electric circuit is formed by the embedded conductor, and a plurality of coil connecting portions 27 and input wire connecting portions 28 connected to the conductor are projected to the outside of the wiring member. For the connection between the coil terminal and the connecting portion, fusing or caulking using a terminal is used. First, Embodiment 1 of the present invention will be described with reference to FIGS. As shown in FIG. 1, an arc-shaped block 1 is formed of a resin (for example, LCP or PPS) molded product, and a plurality of these blocks 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 is provided on the end face in the axial direction of the block 1 and a hook-shaped protrusion 4 is formed in the groove, the conductor 5 is fixed only by inserting the groove into the groove. be able to. The conductor 5 is formed by integrally forming the connection portion by press molding or by welding a terminal of another part to the electric wire, and the connection portion 6 is brought out of the groove, and these and a coil end (not shown) Are connected to form an electric circuit. Alternatively, as shown in FIG. 2, a plurality of portal protrusions 7 for fixing the conductor are provided on the axial end surface of the block 1, and a conductor 8 with a cover is inserted and fixed thereto, or a conductor without a cover is inserted, After fixing, the whole can be subjected to insulation coating (for example, insulation by powder coating). In any structure, parts can be easily conveyed and assembled by dividing the wiring processing member into small blocks. In addition, when there are a large number of models, it is possible to easily perform mold replacement by changing models, and it is possible to quickly perform design changes and new designs at a low price. The depression 29 provided at the end of the block 1 has a shape that engages with a protrusion (not shown) provided at the opposite end of the block 1 and is used for alignment of the blocks.
[0016]
Next, Embodiment 2 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 constituting an electric circuit is inserted into the groove. Further, a pair of fitting portions 9 and 10 in which a partition wall formed by a groove is divided in parallel with the wall surface are provided at both ends in the circumferential direction of each block. By combining the fitting portions 9 and 10 of the adjacent blocks, the blocks are coupled in the circumferential direction to form the ring-shaped wiring processing member 2. The conductor 5 is formed by integrally forming a connecting portion by pressing or by welding a terminal of a separate part to an electric wire, and is fixed to the block 1 with a hook-shaped protrusion 4 provided in the groove. And the connection part 6 which protruded to the outer side of the groove | channel of the wiring process member 2 and the terminal (not shown) of a coil are connected. Here, although each block is connected by a pair of fitting parts 9 and 10, it can move a little in the circumferential direction. Thereby, when the conductor 5 inserted in the inside generates heat, the displacement of the deformation amount due to the difference in 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 stress. Further, the structure of the male and female mating portions of the present embodiment has a creeping distance between adjacent different-phase conductors (along the surface of the insulator) as compared with the case where the wiring processing member 2 is simply divided. The distance between the conductors) can be increased, and insulation performance can be ensured. Thereby, a conductor without coating can be used, material costs can be reduced, and coating removal work becomes unnecessary when connecting to the coil terminal.
[0017]
Next, Embodiment 3 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, and the wiring processing member is assembled in a ring shape. Are assembled to the end face of the stator core 15 from the axial direction. The bobbin 12 is fixed to the 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 processing member. After the insertion, the wiring processing member is fixed in the axial direction of the stator core 15 by the bobbin 12 by completely fitting the fitting portion between the blocks in the circumferential direction. Alternatively, the fitting portion is not provided on the wiring processing member side, and a hook-like protrusion 14 is provided on the outer peripheral surface of the bobbin 12 of the stator coil as shown in FIG. 5 and assembled in a ring shape from the axial direction of the stator core 15. The wiring processing member 2 may be assembled and both may be fixed by hooking the hook-shaped protrusions 14 on the end surface of the wiring processing member 2 by elastic deformation.
[0018]
The block 1 is provided with a female fitting portion 30 in the axial direction, the bobbin 12 is provided with a male fitting portion 31, and the fitting portion 30 and the fitting portion 31 are engaged with each other so that 2 is fixed to the stator core 15 and the bobbin 12. It can fix to the circumferential direction via.
[0019]
Next, Embodiment 4 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 is brought into contact with the outer peripheral surface of the coil end of the bobbin 12 and the end surface of the stator core 15. As a result, the heat generated in the stator coil 17 is transmitted through the path of coil end → coil end bobbin 12 → L-shaped member 16 → stator core 15 and heat can be released to the outside from the stator core of the rotating electrical machine. .
[0020]
【The invention's effect】
By dividing the wiring processing member into a plurality of blocks and assembling the conductor from the axial direction of the stator with respect to the rotating electric machine, the size of the parts can be avoided, and transportation and assembly are facilitated. In addition, the mold becomes smaller, making it easy to change the mold and change the design by switching 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 shows a modification 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 shows a modification 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 shows a rotating electric machine of Comparative Example 1 using a printed wiring board for terminal wiring processing.
FIG. 8 shows a rotating electrical 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 shows a rotating electrical 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 ring shape, 3 ... Insertion groove of conductor, 4 ... Hook-like projection, 5 ... Conductor, 6 ... Connection part, 7 ... Portal projection, 8 ... Cover Attached conductor, 9 ... mating portion on the right end surface of the block circumferential direction, 10 ... mating portion on the left end surface of the block circumferential direction, 11 ... female fitting portion provided on the inner peripheral surface of the block, 12 ... coil bobbin, 13 ... outer periphery of the bobbin at the coil end Male fitting part provided on the surface, 14 ... hook-like protrusion provided on the outer peripheral surface of the bobbin, 15 ... stator core, 16 ... high thermal conductivity member, 17 ... stator coil, 18 ... terminal wire of the coil, 19 ... Printed wiring, 20 ... Printed wiring board, 21 ... Lead wire connecting wire, 22 ... Neutral point connecting wire, 23 ... Coil end, 24 ... Connection part, 25 ... Racing yarn, 26 ... Integrated ring wiring processing Member, 27 ... coil terminal connection part, 2 ... input line connection.

Claims (9)

A stator core made of a magnetic material;
A coil made of a conductor and wound around the stator core or bobbin;
A ring-shaped wiring member constituted by 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 disposed;
Comprising the stator core and a rotor rotatably supported through a gap;
Each of the wiring blocks is movable in the circumferential direction ,
A rotating electrical machine in which a fitting portion for connecting each wiring block is arranged at an end of each wiring block . A stator core made of a magnetic material;
A coil made of a conductor and wound around the stator core or bobbin;
A ring-shaped wiring member constituted by 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 disposed;
Comprising the stator core and a rotor rotatably supported through a gap;
Each of the wiring blocks is movable in the circumferential direction,
The supporting part for supporting the conductor is a rotating electrical machine having a hook-shaped part . 3. The rotating electrical machine according to claim 1, wherein the support portion that supports the conductor has a groove shape. 3. The rotating electrical machine according to claim 1, wherein the support portion disposed in the wiring block has a gate shape. In any one of Claim 1 or 2 , the said coil is wound around the said 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 characterized in that a convex portion or a concave portion provided on the bobbin and a convex portion or a concave portion provided on the wiring member are fitted together. In any one of Claim 1 or 2 , the said coil is wound around a bobbin,
A protrusion is provided on the outer peripheral surface of the bobbin,
The rotating electrical machine, wherein the wiring member is supported by a protrusion provided on the bobbin. In any one of Claim 1 or 2 , the said coil is wound around a bobbin,
A rotating electrical machine, wherein a member having a higher thermal conductivity than the wiring member is disposed between the bobbin and the wiring member. In any one of Claim 1 or 2 , the said coil is wound around a bobbin,
A rotating electrical machine, wherein a member having a higher thermal conductivity than the wiring member is disposed between the bobbin and the stator core. In claims 7 to 8, the rotary electric machine member having a high thermal conductivity than the wiring member which comprises aluminum.

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