JPH1014153A - Stator for electric motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a number of part items and attain improvement of workability, by treating a coil end wire of a stator coil and a lead wire for the outside use, by a substrate provided on a coil end of the stator coil. SOLUTION: In a coil end 2 of a stator coil wound to a stator core 1, a substrate 3, internally wrapping a pattern formed by soft copper integrally resin molded with a supporter 6, is mounted, in this substrate, a terminal 4 is provided, to be connected to a coil end wire, while a power source lead wire, safety protection device 5 and a speed detection element 8 are connected to a connector 10 provided in the substrate 3, to be connected to the coil end wire through the pattern.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stator for an electric motor having a resin-molded substrate for easily connecting a stator coil, a power supply lead wire, a safety protection device and a speed detecting element. Things.

[0002]

2. Description of the Related Art A conventional configuration will be specifically described with reference to FIGS. FIG. 4 shows a stator structure of the electric motor, and FIG. 5 is a front view including a partial cross section of the stator of the electric motor. Reference numeral 1 denotes a stator core, 2 denotes a coil end of a stator coil wound around the stator core, and 13 denotes an insulating property capable of winding a coil terminal wire of the coil end to form a pin terminal 14 that is electrically conductive. An electric insulator 15 made of a resin molded product is a printed circuit board made of an arc-shaped insulator supported so as to cover a part of an end face of the electric insulator, and a conductive conductive layer 16 provided on the printed circuit board. Then, the coil terminal wire from the stator coil and the power supply lead wire 17 are connected by soldering. Reference numeral 18 denotes a binding thread that binds the electric insulator 13 to a coil end. Reference numeral 5 denotes a safety device such as a temperature fuse, which is fitted and fixed in a support 6 having both a function of supporting the printed circuit board 15 and a function of inserting and holding a power supply lead wire. Connect by soldering on the printed circuit board.

[0003] As a processing procedure, a stator coil is wound around a stator core 1 and the above-mentioned electrical insulator 13 with pin terminals is attached to the coil end 2. Furthermore, the safety protection device 5
A plurality of holes are provided on the printed circuit board 15 on which the lead wires 17 for power supply and the support 6 are mounted, and a plurality of holes are provided on the plurality of pin terminals 14 provided on the electrical insulator. The terminal wire of the coil is wound, and the pin terminal is fitted into a hole of the printed circuit board and soldered and fixed to each other.
The support is provided with support legs 11 and inserted into slots (not shown) of the stator core 1.

FIG. 6 is a sectional view of a main part of a rotating electric machine in which an electric insulator is mounted on a stator, 1 is a stator, 2 is a coil end, 13 is an electric insulator, and 19 is a coil terminal from the coil end. Line 14 is a pin terminal. The electric insulator is formed in an annular shape facing the coil end of the stator coil, and can be secured to the stator coil serving as a charging unit by being attached to the upper surface and the inner diameter of the coil end. After the coil wound around the iron core is subjected to a process such as molding, it is necessary to mechanically fix the circumference of the coil end with a tying string by lacing so that the coil does not vary. Simplification can be achieved by using an insulator. An electric insulator leg 21 is provided at one end of the electric insulator so that the electric insulator can be inserted into a slot 20 (stator coil not shown) of the stator core and held and fixed.

A hole is provided in the electric insulator 13 at a position where the coil terminal wire 19 is easily connected, so that a plurality of pin terminals 14 can be erected, and the pin terminals are held and fixed. A terminal wire is wound, inserted into the hole of the printed circuit board, and connected by soldering or the like.

FIG. 7 is a plan view in which a power lead 17, a safety protection device 5, and a support 6 are connected to a printed circuit board 15. This printed circuit board is provided with a hole 22 for inserting a pin terminal mounted on an electric insulator around which a coil terminal wire is wound, and a conductive layer 16 around the hole. The support is integrated with the printed circuit board and provided with support legs (not shown) similarly to the electric insulator, and is held and fixed to the stator core.

In this manner, the terminal wire of the stator coil can be wound around the pin terminal provided on the electric insulator, inserted into the printed circuit board, and connected by soldering or the like. If the connection of the power supply lead wire of the external lead wire and the connection of the safety protection device are made via the conductive layer of the printed circuit board, the connection with the stator coil can be made easily and reliably.

[0008]

As described above, in the prior art, a printed circuit board is often used as a method for connecting the electric power of the motor stator. A particularly large insulation distance between them was required, and a separate support was needed to support the printed circuit board for coupling with the stator core. And
In order to ensure safety, it is necessary to separately provide a protective device storage section for storing a safety device such as a temperature fuse on the support. Also, an electrical insulator with pin terminals for connecting the coil terminal wire from the stator coil is required, and a binding thread for securing the electrical insulator is required, and it is also necessary to secure the printed circuit board. was there. SUMMARY OF THE INVENTION The present invention has been made to solve such a conventional problem, and can easily connect a terminal wire of a coil, a lead wire for a power supply, a safety protection device and a speed detecting element, and a connection between a substrate and a support portion. It is an object of the present invention to obtain an electric motor stator that can achieve both a reduction in the number of parts and a reduction in the number of assembly steps by forming an integral resin molded product.

[0009]

Means for Solving the Problems In order to solve this problem, a stator for an electric motor according to the present invention connects a coil end wire on a board mounted on a coil end,
A power supply lead wire, a safety protection device, and a speed detection element are also connected to the board.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, a pattern is formed by using a soft copper molded integrally with a support on a coil end in which a stator coil is inserted into a stator core in advance.
Attach a ring-shaped substrate that contains Power supply lead wire,
The connection with the safety protection device and the speed detecting element is made via a connector provided on the board. The coil terminal wire is connected on the board. The support provided integrally with the substrate is inserted into the stator core and held and fixed.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention; FIG.
This will be specifically described with reference to FIG. FIG. 1 is a front view including a half section of the stator of the electric motor. 1 is the stator core,
Reference numeral 2 denotes a coil end of a stator coil wound around the stator core, and reference numeral 3 denotes a substrate made of an insulating resin molded product including a pattern formed of a conductive metal. Is connected to a coil terminal wire from the stator coil via a terminal 4 provided on the conductive layer of the conductive material.
Reference numeral 5 denotes a safety protection device such as a temperature fuse, which is fixedly fitted in a safety protection device housing section 7 provided on a support 6 which is formed integrally with the substrate and formed of resin and serves to support the substrate. Reference numeral 8 denotes a speed detecting element such as a Hall IC, which is held and fixed in a speed detecting element housing portion 9 provided on the substrate.

As a processing procedure, a stator coil is wound around a stator core 1 and a substrate made of a resin molded product integrated with a support body including a pattern formed of soft copper is mounted on a coil end 2 of the stator. I do. Further, a plurality of terminals 4 are provided on the circumference of the substrate 3 on which the safety protection device 5, the speed detection element 8 and the support 6 are mounted, and a coil terminal wire is soldered to these terminals and fixed. External leads and the like are connected via a connector 10 provided on the board. The support is provided with a support leg 11 and inserted into the stator core 1.

FIGS. 2 and 3 are a plan view and a bottom view, respectively, showing a state in which the safety protection device 5 and the speed detecting element 8 are held and fixed to the housings 7 and 9 respectively on the substrate 3. This substrate is made of a resin molded product including a pattern formed of soft copper, and connection terminals 4 are provided at predetermined positions on the surface of the substrate. The support is integrated with the substrate and held and fixed to the stator core. In this way, the terminal of the stator coil can be connected to the terminal provided on the substrate by soldering or the like. The connection of the power supply lead wire of the external lead wire, the safety protection device, and the speed detecting element is performed by the connector 10 provided on the substrate.
, The connection with the stator coil can be made easily and reliably. On the end face of the substrate, there is provided a copper plate 1 connected to a pattern made of annealed copper if necessary.
2 are provided. Further, the substrate is not limited to an annular body, and the pattern forming the circuit is not limited to annealed copper, but may be a conductive metal. It is.

[0014]

As is apparent from the above description, the motor of the present invention has the following effects. (1) The coil terminal wire of the stator coil is connected to the conductive terminal standing on the board, and the connection of the power supply lead wire, the safety protection device and the speed detecting element are both provided on the board. Since the connection can be made by the connector, an electric insulator for connecting the coil terminal wire is not required as in the related art, and the number of assembly steps can be reduced. (2) Since the circuit formed of soft copper on the annular substrate is encapsulated in the resin, the pattern which could only be formed on a flat surface until now was used.
The problem between the patterns can be eliminated three-dimensionally because the insulating resin is interposed between the patterns, and the insulation distance can be easily secured. In addition, since it is not necessary to increase the insulation distance as in the related art, the size of the substrate can be reduced. (3) Since the substrate and the support are integrated resin molded products, they do not need to be connected to each other as in the related art, and the respective storage portions of the safety protection device and the speed detecting element are also integrally formed as a resin molded product. A leg is provided at one end of the support of the substrate so that the leg can be inserted and held in the stator core. As described above, there is no need to connect the board and the support because it is an integrated resin molded product, so the number of assembly steps is reduced, the insulation distance can be easily secured, and the number of parts is reduced. It has a much better effect than that.

[Brief description of the drawings]

FIG. 1 is a front view of a stator of an electric motor according to the present invention.

FIG. 2 is a plan view of a substrate according to one embodiment of the present invention.

FIG. 3 is a bottom view of a substrate according to one embodiment of the present invention.

FIG. 4 is a plan view of a conventional motor stator.

FIG. 5 is a front view of a conventional motor stator.

FIG. 6 is a sectional view of a conventional motor stator.

FIG. 7 is a plan view of a conventional printed circuit board.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Stator iron core 2 Coil end 3 Substrate 4 Terminal 5 Safety protection device 6 Support body 7 Security protection device storage part 8 Speed detection element 9 Speed detection element storage part 10 Connector 11 Support leg part 12 Copper plate 13 Electrical insulator 14 pin Terminal 15 Printed circuit board 16 Conductive layer 17 Lead wire for power supply 18 Bundling thread 19 Coil terminal wire 20 Slot 21 Leg for electric insulator 22 Hole

Claims (5)

[Claims] 1. A circuit formed of a conductive metal at a coil end of a stator coil, a substrate integrally formed of resin is mounted, and a coil terminal line of the stator coil is connected to a terminal provided on the substrate. And a connector provided on the board to connect an external lead wire. 2. The electric motor stator according to claim 1, wherein the conductive metal is made of soft copper. 3. The stator for an electric motor according to claim 1, wherein the supporting portion is formed integrally with the substrate made of a resin molded product. 4. The stator for an electric motor according to claim 1, wherein the protection device housing portion is formed integrally with the support portion. 5. The stator for an electric motor according to claim 1, wherein the speed detecting element housing portion is formed integrally with the substrate.