JPS59209048A - Single-phase pole number changeable type induction motor - Google Patents

Abstract

PURPOSE:To reduce the cost and to improve the various characteristics of an induction motor by replacing the idle winding of each winding contained in a stator slot by part of an insulator. CONSTITUTION:2-pole windings are alternately inserted with 4-pole windings so that 2-pole main winding 1, 4-pole auxiliary winding 4, 2-pole auxiliary winding 2 and 4-pole main winding 3 are aligned sequentially from the outer peripheral side in the slot 7 of a stator core 5, thereby forming a stator of a single-phase pole number conversion type induction motor. In this motor, the 4-pole windings 3, 4 become idle at the 2-pole time, and 2-pole windings 1, 2 become idle at 4- pole time. Accordingly, part of the 4-pole windings operates as an insulator at the 2-pole operation time, and part of 2-pole windings operates as an insulator at the 4-pole operation time. In this manner, the number of the insulators can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a single-phase pole-converting induction motor that uses separate windings for a small number of poles and for a multi-pole state, and particularly to its stator winding.

Figure 1 shows the state of insertion of windings and insulating paper into the stator premises in the case of a multi-winding system, assuming that the number of stator grooves is 24 with single-phase 2-pole/4-pole conversion. FIG. 2 is a cross-sectional view of a stator of a single-phase pole-number conversion type induction motor. In the figure, 1 is a 2-pole main winding, 2 is a 2-pole auxiliary winding, 3 is a 4-pole main winding, 4 is a 4-pole auxiliary winding, 5 is a barbed constant core, and 6 is an insulating material. show.

Further, 7 is a stator groove provided on the inner circumference of the stator core 1;
The windings 1 to 4 and the insulating material 6 are housed in the stator grooves 7.

Further, FIG. 2 is a developed view showing the connection state of FIG. 1, and the numbers 1 to 24 in the figure correspond to the numbers of the stator grooves 7 in FIG. 1.

A conventional single-phase pole conversion type induction motor that has separate windings for small poles and multiple poles is configured as described above, and to explain its operation, when there are two poles, - is the main winding for two poles. 1 and 2-pole auxiliary winding 2 are used, and become a 4-pole main winding 3 and a 4-pole auxiliary winding 4n idle winding. Moreover, in the case of 4 poles, the 4 pole main winding 3 and the 4 pole auxiliary winding 4 are used, and the 2 pole main winding 1 and the 2 pole auxiliary winding 2 become idle windings.

In the conventional device as described above, the minimum number of insulating materials 6 required for insulating the windings in the stator groove 7 is limited to The pieces B stored adjacently in the sub groove 7 [i.e., the stator groove 7 (cabin 3 .4,5,8,9,10,
15, 16°, 17.20, 21.22), a total of 12 locations,
and a stator groove 7 (m2) in which the 4-pole main winding 3 and the 4-pole auxiliary winding 4, which are energized during 4-pole operation, are adjacent to each other.

5.8, 11, 14, 17, 20. ．． 23) autopsy 8 pieces D
In this way, in the conventional device, the minimum number of insulating materials 6 required becomes extremely large, and the cost of the motor becomes high. The relative reduction in the amount of wires that can be stored has led to a deterioration in motor characteristics.

The present invention has been made in order to eliminate the above-mentioned conventional drawbacks. Focusing on the importance of not using pole windings or using fewer pole windings during multi-pole operation, by considering the order of each winding to be stored in the stator groove 7, it is possible to reduce insulation material with idle windings. The purpose is to reduce the required number of insulating materials 6 by replacing a portion of the insulating materials 6, thereby reducing costs and improving the motor characteristics.

Embodiments of the present invention will be described below with reference to the drawings.

In this embodiment, as shown in FIG.
．． 4-pole auxiliary winding 4. 2-pole auxiliary winding 2 and 4-pole main winding 3, with 2-pole winding and 4-pole winding inserted alternately. : It has become.

In the single-phase pole-converting induction motor with the above configuration, the main winding 1 for two poles and the auxiliary winding 2 for two poles are used for two poles, and the main windings 3 and 4 for four poles are used, as in the conventional example. The auxiliary winding for poles is a 4-key play winding. Furthermore, during 4-pole operation, the 4-pole main winding 3 and auxiliary windings 13!4 are used up, and the 2-pole main winding 1 and auxiliary winding 2 become idle windings. Therefore,
During 2-pole operation, a part of the 4-pole m winding is N! It operates as a two-pole wire, and during four-pole operation, a part of the two-pole winding operates as an insulator. Therefore, in the case of FIG. 3, the number of insulating materials 6 is reduced to four.

FIG. 4 shows another embodiment of the present invention, in which the windings are inserted into the stator groove 7 in order from the outer circumferential side to the two-pole main winding 1.4.
The main winding for poles is 3, the auxiliary winding for 2 poles is 2, and the auxiliary winding for 4 poles is 4. The present invention has the same effect as the embodiment described above, and the number of insulating materials 6 is reduced to 12.

As described above, in the present invention, the order in which the stator windings are stored in the stator grooves is alternately arranged such that the windings for few poles and the windings for many poles are stored in the stator grooves.
During operation on the low-pole side, a part of the multi-pole winding acts as an insulator, and conversely, when operating on the multi-pole side, V (- indicates that a part of the low-pole winding operates as an insulator).

Therefore, it is possible to reduce the number of required insulating materials, thereby reducing costs, and by increasing the effective stator area, the winding width can be increased, and one motor damage can be avoided. can be improved.

[Brief explanation of the drawing]

Figure 1 is a sectional view of the stator of a conventional single-phase pole-converting induction motor, and Figure 2 shows the stator winding connections of a conventional single-phase pole-converting induction motor. The figure is a sectional view of a stator in one embodiment of the single-phase pole-number-converting induction motor '4' according to the present invention, and FIG. 4 is another embodiment of the single-phase pole-number-converting induction motor according to the present invention. FIG. 1...2-pole main winding, 2...2-pole auxiliary winding, 3.
...4-pole main winding, 4--4-pole auxiliary winding, 5--stator core, 6--insulating material, 7--stator groove. Note that the same reference numerals in the figures indicate the same or corresponding parts. Agent Masuo Oiwa Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Scope of claims] A single-phase pole number conversion type induction motive characterized by alternating the windings for a small number of poles with the main winding for a small number of poles, and the auxiliary winding for a small number of poles from the outer periphery. A single-phase pole conversion type induction motor according to claim 1, characterized in that the auxiliary winding for poles and the main winding for multi-pole are used. A single-phase pole-number conversion type induction motor according to claim 1, characterized by a main winding, a multi-pole main winding, a small-pole auxiliary winding, and a multi-pole auxiliary winding.