JPS58195457A - Manufacture of armature for slotless flat rotary electric machine - Google Patents

Abstract

PURPOSE:To enhance the bonding strength of an armature core to an armature coil by interposing a porous insulating sheet between the core and the coil and impregnating the sheet with a thermosetting resin. CONSTITUTION:The axial end face of an armature core 1, the inner and outer peripheral surfaces of the core are covered with porous insulating sheets 2 which can be preferably impregnated with a resin, and an armature coil 3' is contacted on the surface of the sheet 2. Subsequently, the coil 3' is retained by a retainer, impregnated with a thermosetting resin, and thermally set. In this manner, since the thermosetting resin is impregnated between the core 1 and the coil 3', the bonding strength of the core to the coil can be increased and the isulating strengths of both can be increased.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a method for manufacturing an armature of a slotless flat rotating electric machine such as a flat brushless motor.

[Technical background of the invention]

BACKGROUND ART Conventionally, a thermomotor used in a manipulator, for example, is generally required to be small, lightweight, and able to obtain large torque during acceleration/deceleration (instantaneous drive movable). In particular, there is a demand for motors with very small axial dimensions for use in manibulake arms, etc., and there has been a demand for the practical use of flat brushless motors.

By the way, most conventional brushless motors generate relatively small torque and have a small amount of armature windings (coils).

When attaching the armature winding to the armature core, its rounding, mechanical attachment strength, and electrical insulation strength were not considered to be so problematic.

[Problems with background technology]

Naturally, there has been a strong demand for such flat brushless motors with large diameters as described above. In order to manufacture a brushless motor for this purpose, it is possible to increase the amount of armature windings to generate a large torque, but the rounding to achieve this poses the following problems. .

(ai) When the volume of the winding is increased, it is difficult to round the winding to the iron core, and there is a problem in terms of mechanical attachment strength. □' (b) If the amount of windings is increased, the electrical withstand voltage (insulation strength) between the core and the windings must be increased accordingly, and as a result: an insulation distance corresponding to the amount of insulation is required, and the shaft The directional dimension becomes long and the above requirements cannot be met.

[Purpose of the invention]

The present invention was made in view of the above circumstances, and its purpose is to provide a slot that can obtain large torque while ensuring sufficient electrical insulation strength and mechanical strength between the winding and the iron core. An object of the present invention is to provide a method for manufacturing an armature of a flat type rotary electric machine.

[Summary of the invention]

In order to achieve the above object, in the present invention, when an armature winding is attached to a slotted or traced armature core to form an armature, a porous insulating sheet such as a non-woven fabric with good resin impregnation properties is used for the scissor core. The winding wire is placed on the wire, the winding wire is placed on the wire, the wire is pressed down with a pressing member, and the entire surface is impregnated with a thermosetting ζ-based resin, which is then heated and cured.

:Po [Embodiments of the invention: An embodiment of the present invention shown in the drawings will be described below.

FIG. 1 is a plan view showing an example of the configuration of a flat brushless motor as a cross-section flat rotating electric machine according to the present invention.

In the figure, a slotless armature (stator) core (e.g., a wound core) having a circular ring shape is made up of fan-shaped unit windings 3 arranged so as to overlap each other as shown in the figure, with a porous insulating sheet 2 interposed therebetween. The armature windings are attached to form an armature. Also, a rotor 5 attached to a shaft 4 is rotatably provided inside the armature core 1.

Next, a method for manufacturing the armature described above will be explained in detail using FIG. 2. FIG. 2 shows a longitudinal cross-sectional configuration of the motor in the axial direction in FIG. 1, and is similar to that in FIG. 1, and the same parts as in FIG.

Now, when hiring armature core IK armature winding S,
First, cover the axial end face, inner circumferential surface, and outer circumferential surface of the armature core 1 with an insulating sheet IOp.
The armature winding 3 to be attached is placed on the surface, and the surface is pressed with a pressing member (not shown). In such a state, the bale worker 4
The entire body is impregnated with a thermosetting resin such as resin, and then heated and cured to be molded. As the insulating sheet 2, a porous insulating sheet having good impregnation with resin or resin, such as a non-woven fabric, is used. Note that the surface of the presser member is previously subjected to a peeling treatment to facilitate removal of the legs after heat curing.

The armature manufacturing method as described above provides the following effects.

(a) The armature has a large amount of windings IwS, and can generate a large torque when operated as a motor, making it possible to apply it to the manipulators described in 9 above.

(b) Since the windings 115 are deposited on the armature core 1 through the nonwoven fabric 2, which is a porous insulating sheet with good resin impregnation properties, and are completely impregnated with the resin, The resin is also impregnated between the iron core 1 and the winding 1lA3,
Since the core and armature are bonded together, the adhesive strength is increased (through insulating paper) and the mechanical attachment strength is improved, making it possible to firmly attach a large amount of windings 3 to the iron core 1. be.

(C) Electrical insulation between the armature core 1 and the winding 1 can be ensured by the non-woven fabric 2 which is an insulating sheet, so even if the amount of the winding 3 increases, the dielectric strength can be increased. Since there is no need to increase the insulation distance, the axial dimension can be shortened, and the application to the armrest of the manipulator described above is extremely effective. Another feature of this method is that it has reduced workability. In the above embodiments, a nonwoven fabric was used as the insulating sheet, but other porous insulating sheets with good resin impregnation properties may be used.

In addition, although epoxy resin was used as the resin, other thermosetting resins may be used.Note that the pores of the insulating paper are impregnated with the resin, which exhibits extremely high insulation properties as a film insulation. - In addition, the present invention can be implemented with various modifications without changing the gist thereof. - [Effects of the Invention] As explained above, according to the present invention, sufficient electricity can be generated between the winding and the iron core. It is possible to provide an armature manufacturing method for an extremely reliable slotless flat rotating electric machine that can obtain large torque while ensuring absolute mechanical strength.

[Brief explanation of the drawing]

1 and 2 are a plan view and a vertical sectional view showing an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1...Armature core, 2...Nonwoven fabric, 3...Electric plate winding, 4...Shaft, 5...Rotor.

Claims (2)

[Claims] (1) Slotless flat type 7-axis air gap rotating electrical machine equipped with an armature in which armature windings consisting of fan-shaped unit windings arranged in a superimposed manner are attached to a slotless armature core. When attaching the armature winding to the armature core, first cover the axial end face of the armature core and its inner and outer circumferential surfaces with a porous insulation sheet with good resin impregnation, Next, apply the armature winding to the surface of the porous insulation sheet 1), then press the scissor armature winding with a pressing member, completely impregnate it with a thermosetting resin, heat harden it, and heat cure the armature winding. Wires, armature core, and armature manufacturing method for slotless flat rotating electric machines. (2) A method for manufacturing an armature of a slotless flat-type enclosed electric rotating machine according to claim (1), wherein a nonwoven fabric is used as a porous insulating sheet.