JPS62281744A - Single-phase induction motor - Google Patents

Abstract

PURPOSE:To simplify a coil winding process by constituting a stator through combining particularly formed first and second stator portions. CONSTITUTION:A stator is constituted by combination of a first stator portion, in which an annular yoke 5 and bases 6a, 7a of bipolar magnetic poles 6, 7 are formed into an integral body, with a second stator portion, in which mutual magnetic poles 6, 7 are formed into an integral body. Tips pf the bases 6a, 7a of the first stator portion are provided with fitting projections 6b, 7b for combining with the second stator portion. The second stator portion is provided with fitting recesses corresponding to the fitting projections 6b, 7b and fitting recesses for mounting shading coils 10.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention [Technical Field] The present invention relates to a single-phase induction motor with an improved stator structure.

[Background Art] The applicant of the present application has been researching a shaded coil type single-phase induction motor having a rotor of either an external rotor type or an internal rotor type. In this type of electric motor, the winding and installation of shaded coils is an impediment to improving performance and productivity, but the applicant has made improvements thereto. For example, as shown in FIGS. 8 and 9, a shaded coil A is formed by winding a conductor around a coil base C having a fitted portion B, and a stator E is formed at the tip of a magnetic pole F. Shaded coils A are installed at both ends in the circumferential direction.
It is formed asymmetrically with respect to the center line passing through the center of the electric motor so as to have fitting portions, and the shaded coil A is fitted between adjacent fitting portions. G is a rotor and H is a winding.

In this case, the amount of magnetic air gap between the rotor G and the stator E is stable, and the manufacturing process is also simple. - However, the process of winding the winding H around the pole piece F was extremely complicated and difficult due to the shape of the stator E.

[Object of the Invention] The present invention has been made in view of the above-mentioned reasons, and its object is to provide a single-phase induction motor in which the process of winding the windings is simple and easy.

[Disclosure of the Invention] The single-phase induction motor of the present invention includes a stator, a circular yoke, and two
A first stator part in which the bases of the magnetic poles of the poles are integrally formed and a second stator part in which mutual magnetic poles are integrally formed are separately formed, and the two stator parts are combined. This feature simplifies the winding (winding, mounting) process of the winding.

(Example) Hereinafter, an example of the present invention will be described based on FIGS. 1 to 6.

Reference numeral 1 denotes a rotor, which has a plurality of stamped iron cores stacked on top of each other, has a squirrel cage winding (not shown) applied thereto, has a cylindrical shape as a whole, and has a rotor that rotates at the center of the rotor base 2. It has a child shaft 3.

A stator 4 is disposed around the outer periphery of the rotor 1, and is formed by laminating a plurality of punched iron cores. The stator 4 has two magnetic pole pieces 6 and 7 arranged at equal intervals in the circumferential direction protruding inward from an outer annular yoke 5, and the tips of both magnetic pole pieces 6 and 7 are arranged in the circumferential direction. The ends thereof are magnetically coupled to each other, and the magnetic pole pieces 6 and 7 face the outer peripheral surface of the rotor 1.

To explain the structure of this stator 4 in more detail, as shown in FIG.
A first stator part 8 integrally formed with a mutual magnetic pole piece 6,
7 is formed separately from the second stator portion 9 which is integrally formed.

Fitting protrusions 6b and 7b for coupling to the second stator part 9 are provided on the tip surfaces of the base parts 6a and 7a of the first stator part 8. On the other hand, the second stator portion 9 is provided with fitting recesses 9b, 9b corresponding to the fitting protrusions 6b, 7b, and fitting recesses 9c, 9c for mounting the shaded coil 10. Note that the magnetic pole piece 6.
7 can be considered to be magnetically coupled, that is, the base 6a,
It is desirable that the magnetic path cross-sectional area of a portion 90 degrees away from the center line of 7a in the circumferential direction be slightly smaller than that of other portions.

In order to generate a rotating magnetic field in the stator 4, the shaded coil 10 is formed into a short-circuited ring in the shape of an opening, as shown in FIG. , the fitting recesses 9c, 9c (second stator part 9).

Reference numeral 11 denotes a winding to be wound around the magnetic pole pieces 6 and 7. As shown in FIG. The winding frame 12 is attached to the base parts 6a, 7a (first stator part 8). Note that the winding frame 12 can be prevented from falling off by providing small protrusions 6d and 7d on both sides of the tip surfaces of the bases 6a and 7a that protrude in the direction of extension of the tip surfaces.

Thus, the stator 4 is constructed by attaching and coupling the second stator section 9 equipped with the shaded coil 10 to the first stator section 8 equipped with the winding frame 12.

FIG. 6 shows the overall structure of the electric motor, in which the rotor shaft 3 is
is rotatably supported via a bearing 14, and the stator 4 is fixed to the outer cylindrical portion 13b.

As is clear from the above explanation, the winding 11 is preliminarily attached to the winding frame 1.
2 and then attached to the magnetic pole pieces 6, 7 (first stator section 8), the process of winding the winding 11 is simple and easy. Also, a small protrusion 6d.

7d to prevent the winding frame 12 from falling off makes the above-mentioned mounting work easier. Furthermore, the shaded coil 10 is also formed in a mouth shape in advance, and then the fitting recesses 9c, 9c are formed.
(second stator part 9), the process of forming and installing the shaded coil 10 is simple and easy.
During the process of forming and installing the rotor 1, there is little risk that a large external force will be applied to the stator 4 and cause it to deform, thus making it easier to maintain an appropriate gap between the rotor 1 and the stator 4.

FIG. 7 shows a different embodiment of the present invention, in which a stator is disposed on the inner periphery of the rotor. The stator of this embodiment is substantially the same as that of the previous embodiment, with the annular yoke located on the inside and the magnetic pole pieces located on the outside.

Therefore, substantially the same parts are given the same reference numerals.

Note that the relationship between the projections and depressions between the fitting protrusions 6b and 7b and the fitting recesses 9b and 9b may be reversed, and the shape for fitting may be changed as appropriate.

[Effects of the Invention] The single-phase induction motor of the present invention includes a stator having a first stator portion in which a rotary yoke iron and a base portion of a second magnetic pole piece are integrally formed;
Since the mutual magnetic pole pieces are formed separately from the integrally formed second stator part, and the two solid electronic parts are combined,
This has the effect of simplifying the winding (winding, mounting) process of the winding wire.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway plan view showing an embodiment of the present invention, and FIG. 2 is an exploded plan view of the stator, in which (a) is the first stator section, (b is the first stator section), and FIG. 21M electronics section, Figure 3 is (a>(b) is a perspective view of the shaded coil, Figure 4
The figure is a perspective view showing the installation process, FIG. 5 is a perspective view showing the winding installation process, FIG. 6 is an overall sectional view, and FIG. 7 is a different embodiment of the present invention. FIG. 8 is a partially cutaway plan view, FIG. 8 is a plan view of the previously proposed device, and FIG. 9 is a perspective view of the shaded coil. 1-Rotor, 4-Stator, 5-Annular yoke, 6.7
---Magnetic pole element, 6a, 7a-base of magnetic pole element, 8-first stator part, 9-second stator part, 10-shading coil, 11-
Winding wire, 12--winding frame, 13--motor base, 14--bearing. Patent applicant Matsushita Electric Works Co., Ltd. Patent attorney Toshikuro Takemitsu (and 2 others): 3.

Claims (1)

[Claims] (1) A rotor having a cylindrical shape, and a rotor disposed on the inner or outer circumference of the rotor, having two magnetic pole pieces protruding from an annular yoke, and having two magnetic pole pieces protruding from the annular yoke. a stator whose tips extend in the circumferential direction and whose ends form magnetic pole pieces that are magnetically coupled to each other, and where the magnetic pole pieces face the circumferential surface of the rotor;
In a single-phase induction motor comprising a shaded coil attached to the stator to generate a rotating magnetic field in the stator, and windings wound around both magnetic poles, the stator has an annular yoke. and a first stator part in which the bases of the two magnetic poles are integrally formed, and a second stator part in which the mutual magnetic poles are integrally formed, and the two stator parts are combined. A single-phase induction motor.