JPH0213247A - Manufacture of stator for electric rotary machine - Google Patents

Abstract

PURPOSE:To improve the positional accuracy of winding by forming an axial groove for inserting a stator winding and an annular groove in the outer circumference of a tubular body made of insulating resin and securing the winding wound in the axial groove through taping at the annular groove section. CONSTITUTION:A plurality of axial grooves 1a for inserting a winding are made with same interval in the outer circumference of a tubular body 1 made of insulating resin and an annular groove 1b is further made in the outer circumference. A winding 2 wound in the axial groove 1a is secured by means of an insulating tape 3 at the annular groove section 1b, then the winding 2 is subjected to insulating varnish treatment this state. The tubular body 1 is secured through adhesive to the inner circumference of a tubular core 4 thus forming a stator 5. By such a method, the winding 2 can be wound without making a winding insertion groove in the stator core 4.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention provides a manufacturing method for forming a stator by winding a winding without providing a winding insertion groove in a stator core of a rotating electric machine. The present invention relates to a manufacturing method in which positional accuracy in the circumferential direction and radial direction of the winding wire can be ensured and insulation treatment can be easily performed.

[Conventional technology]

In a stator of a rotating electric machine, which is formed by winding a winding without providing a slot for winding insertion on the stator core (hereinafter referred to as a slotless stator), the stator is generally formed according to the circumferential pitch of the winding. A winding was formed in advance using a winding frame, and this winding was placed around the outer periphery, and a cylindrical body made of an insulated magnetic material was fixed to the inner periphery of the cylindrical core with adhesive. .

The windings are arranged equally on the outer circumference of the cylindrical body according to the number of phases of the rotating electric machine, the polarity, and the pitch in the circumferential direction of the windings, and then the thickness in the radial direction is made uniform with a shaping jig. The resin insulator is injected with a resin injection jig attached to the insulator, and the insulation is treated and fixed.

[Problem to be solved by the invention]

In the above method, when the resin insulation is injected, the windings are displaced in the circumferential direction and the radial direction on the outer periphery of the cylindrical body, resulting in uneven circumferential pitch of the windings and uneven thickness of the resin insulation. Moreover, since there are many manufacturing steps, the number of man-hours increases and it becomes expensive.

In order to eliminate the above-mentioned drawbacks, this invention makes it possible to wind the windings of a slotless stator while ensuring positional accuracy in the circumferential and radial directions, and to easily perform insulation treatment. The purpose of the present invention is to provide a method for manufacturing a stator for a rotating electric machine.

[Means to solve the problem]

In order to achieve the above-mentioned object, this invention has a shaft having an appropriate width on the outer periphery of a cylindrical body 1 made of a resin insulator, depending on the number of phases and poles of a rotating electric machine and the pitch in the circumferential direction of the stator windings 2. A plurality of directional grooves 1a are provided and an annular groove 1b is formed, and the winding 2 wound around the axial groove 1a of the cylindrical body 1 is inserted into the annular groove 1.
The part b is taped and fixed with insulating tape 3, and after insulating the winding 2 with insulating varnish, the cylindrical body 1 is fixed to the inner circumference of the cylindrical core 4 with adhesive to form the stator 5. This is the manufacturing method.

[Effect]

The cylindrical body 1 serves as a winding frame for the winding 2 and an insulator, and the winding 2 wound in the axial groove 1a is fixed by taping at the annular groove lb, so that the circle of the winding vA2 is Positional accuracy in the circumferential and radial directions can be ensured, and the circumferential pitch of the winding 2 and the thickness of the insulator can be made uniform, and the insulation treatment of the winding 2 can also be simplified, so that the stator 5 becomes cheaper.

〔Example〕

1 to 3 show an embodiment of a stator 5 manufactured by the manufacturing method of the present invention. These diagrams are 4-pole DC
A slotless stator 5 of a motor is shown, and a cylindrical body 1 made of a resin insulator with a stator winding 2 wound around its outer periphery is inserted into the inner periphery of a cylindrical iron core 4 and fixed with adhesive. A stator 5 is formed. As shown in FIGS. 4 and 5, the cylindrical body 1 has the number of phases of the rotating electric machine (1 in the figure), the number of poles (4 in the figure) and the circumferential pitch of the winding 2 on the outer periphery. A plurality (four in the case of the figure) of axial grooves 1a for @ wire insertion with an appropriate width are provided equally on the circumference, and an annular groove 11b is further formed on the outer circumference.

This cylindrical body 1 also serves as a winding frame for the winding wire 2, and the winding wire 2 is wound directly onto the axially long projection 1c between the adjacent axial grooves 1a using a winding machine or the like. The winding 2 wound around the axial groove 1a is fixed by taping with an insulating tape 3 at the annular groove lb, and in this state is insulated with an insulating varnish. The stator 5 is fitted and supported on the inner periphery of a cylindrical frame 6, and a rotor 7 with a permanent magnet is installed inside the stator 5.
is rotatably supported.

According to the embodiment, the winding 2 can be wound without providing a winding insertion groove in the stator core 4. Furthermore, by fixing the protrusion 1c and the annular groove lb of the cylindrical body 1 with taping, it is possible to reliably prevent the position of the winding 2 from shifting, thereby easily achieving positional accuracy in the circumferential direction and the radial direction.
In addition to keeping the circumferential pitch and the thickness of the insulator uniform, the winding 2 can be arranged concentrically with the iron core 4.

Furthermore, the manufacturing process is reduced compared to the method described in the prior art, and the mechanization of the winding work and the insulation treatment of the winding 2 are facilitated, so that the stator 5 can be made inexpensive.

In the above embodiment, the case of a four-rod DC motor has been described, but the present invention is not limited to this.

〔Effect of the invention〕

According to this invention, in a method for manufacturing a slotless stator for a rotating electric machine, an axial groove and an annular groove for inserting a stator winding are formed on the outer periphery of a cylindrical body made of a resin insulator, and a winding is wound around the axial groove. The wire is taped and fixed in the annular groove, and after the winding is insulated with insulating varnish, the cylindrical body is fixed to the inner periphery of the cylindrical core to form the stator, so that the circumference of the winding It ensures positional accuracy in the direction and radial direction, keeps the circumferential pinch of the winding and the thickness of the insulation uniform, and further reduces the manufacturing process and facilitates the mechanization of the winding work and the insulation treatment of the winding. Many advantages can be obtained, including the ability to reduce the cost of the stator.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view of an embodiment of a stator manufactured by the manufacturing method of the present invention, FIG. 2 is a vertical cross-sectional view of the main part of FIG. 1, and FIG.
FIG. 4 is a front view of the cylindrical body shown in FIGS. 1 and 3, and FIG. 5 is a longitudinal sectional view taken along line V-V in FIG. 4. DESCRIPTION OF SYMBOLS 1... Cylindrical body, 1a... Axial groove, b... Annular groove, 2... Winding wire, 3... Insulating tape, 4... Iron core, 5... Stator. Figure 5

Claims (1)

[Claims] 1) A plurality of axial grooves with an appropriate width are provided on the outer periphery of a cylindrical body made of a resin insulator according to the number of phases and poles of the rotating electric machine and the circumferential pitch of the stator winding, and an annular groove is formed.
The stator winding wound around the axial groove of this cylindrical body is fixed by taping with insulating tape in the annular groove, and after insulating the winding with insulating varnish, the cylindrical body is placed inside the cylindrical core. A method for manufacturing a stator for a rotating electric machine, characterized in that a stator is formed by fixing the stator around the periphery with an adhesive.