JPS61180540A - Manufacture of motor stator - Google Patents

Abstract

PURPOSE:To reduce a slot ripple by stacking steel plates in which conductors are buried through insulators in a plurality of holes and connecting plates in which leads are disposed to be connected as prescribed, thereby eliminating slot openings. CONSTITUTION:Holes 2 are punched radially at the prescribed interval on a steel plate 1, and tapered in the prescribed direction. Then, conductors 3 and insulators 4 are molded. Subsequently, two plates 1 are so superposed as to oppose at the larger hole opening side of the plates 1 in such a manner that one set includes two plates to assemble a core. Wirings by conductors are formed so that the winding connections at both sides of the core becomes the prescribed winding connection to an insulating connecting plate 7. Thus, since slot openings necessary at the time of winding a winding can be eliminated, a torque ripple generated to the slot opening can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a method of manufacturing a motor stator suitable for a special C2 small motor.

Technical Background of the Invention Problems] When winding two windings on the core C of a small motor, the slot portion of the core becomes small, making it difficult to directly wind the two windings on the core C.
Machine winding is even more difficult. Therefore, there is a limit to miniaturization of the motor.

Additionally, slot openings are provided in the core for inserting the windings, which causes slot ripple.

[Purpose of the invention]

The present invention improves the method of winding windings around the motor core, which had previously been limiting the miniaturization of motors, and enables the miniaturization of motors.In addition, the lack of slot openings in the core reduces slot ripple. The purpose of the present invention is to provide a method for manufacturing an electric motor stator that can reduce ``.

[Summary of the invention]

The method of the present invention involves punching out a number of holes in a steel plate of an iron core for arranging a conductive material, placing the conductive material in the holes, filling the gap between the hole and the conductive material with an insulating material, and fixing the material integrally to the steel plate. At the end of the iron core, connect the conductor in a predetermined manner using a connecting plate arranged so that the above-mentioned steel plate and connecting plate are stacked,
It is possible to reduce the size of the motor by eliminating the need to wind windings directly around the iron core.

[Embodiments of the invention]

An embodiment of the present invention will be described below.

FIG. 1 shows a steel plate of a stator to which the conductive material of the present invention is integrally fixed. Holes 2 are punched radially (2) at regular intervals in the steel plate 1, and the holes 2 are further provided with a taber (C) in a constant direction as shown in FIG. 2. Next, as shown in FIG. The insulator 4 is molded.At this time, the conductor 3 and the insulator 4 are also molded so that they are tapered in the same direction as the hole 2.The conductor 3 is also axially slightly thicker than the two steel plates. Do it like this.

Next, the steel plates 1 described above are stacked to assemble the iron core, but the problems that arise at this time are that the contact resistance between the conductive materials is low, the conductive material 3 and the insulator 4 in the holes 2 fall off, and the steel plates 1
This is the position.

First, to prevent the conductive material 3 and the insulating material 4 from falling off, two steel plates 1 are stacked as a set by stacking them one on top of the other so that the wider holes of the steel plates 1 face each other, as shown in FIG. In this way, no matter which direction the force is applied in the axial direction, the hole is tapered, so the conductive material 3 and the insulating material 4 will not fall out.

Next: Consider the contact resistance between two conductive objects.

Contact resistance includes concentrated resistance and boundary resistance (film resistance).To reduce concentrated resistance, contact force should be increased. Therefore,
As shown in FIG. 4: 1: Between the steel plates 1: A thin insulating film 5 with a hole of the same size as the hole is sandwiched between the steel plates 1 and the film 5, and then a force is applied in the axial direction. Therefore, C2 can be tightened through the peripheral edge of the steel plate 1 (Nivolt).Also, in order to further reduce the concentrated resistance, the conductor 3 should have the same thickness as the steel plate 1 and have a small hardness.
A conductive material with a low resistivity is deposited on the surface of the conductive material 3, and a force is applied by sandwiching the film 5 as described above. This is to reduce the elastic limit. When we think of an object as copper, we can think of silver.

Boundary resistance is then caused by a thin film on the metal surface, which may be an oxide, oil, dust, water 9 or the like.

By cleaning the conductor surface, the boundary resistance will be smaller than mini. Positioning of the steel plate can be done by providing several protrusions on the steel plate.

The steel plates are laminated in the manner described above. Both ends of the iron core (
For the winding connection, as shown in FIG. 5, the wiring 6 made of a conductor is formed on the insulating connection plate 7 so as to form a predetermined winding connection. The surface of the connection board 7 other than the wiring 6 is covered with an insulator.

Said steel plate 1. The insulating film 5 and the connecting plate 7 are laminated, and bolts are passed through four locations around the periphery to tighten them. As described above, the state is similar to that of winding the winding, and the difficult work of winding the winding directly around the iron core is not necessary and can be done easily.

It should be noted that the present invention is not limited to the embodiments shown above; for example, as shown in FIG. It can be implemented with various modifications without changing.

〔Effect of the invention〕

As explained above, according to the method of the present invention (: winding the winding directly on the iron core: 2. It is possible to form the winding on the iron core simply by stacking steel plates with conductive materials integrally fixed to the iron core. Because it can be done, the motor can be made smaller, and since it is only a matter of stacking steel plates, it can be easily produced by machine (C), increasing production efficiency.

Further, since slot openings required when winding the wire are not required, torque ripples caused by the slot openings can be reduced.

[Brief explanation of drawings]

FIG. 1 is a plan view of a steel plate used in an embodiment of the method for manufacturing a motor stator of the present invention, and FIGS. 2, 3, and 4 show different manufacturing processes for the steel plate shown in FIG. 1. 5 is a partial plan view of the connecting plate, FIG. 6 is a perspective view showing the lamination process of the steel plate and the connecting plate, and FIG. 7 is a plan view of the steel plate used in another embodiment of the present invention. be. 1... Steel plate 2... Hole 3... Conductor 4... Insulator 5... Insulating film 6... Wiring 7... Connection plate 8
... Lead line agent Patent attorney Noriyuki Chika (and 1 other person) Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] A plurality of steel plates with conductive materials embedded in a plurality of through holes via insulators are laminated with the conductors sandwiched between connecting plates arranged in a predetermined shape, and then tightened to form a stator with the conductive materials and the conductors. A method of manufacturing a motor stator, the method comprising forming a winding.