JPH0423502B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a winding method for a rotating electric machine coil, and particularly in compressors for refrigerators, etc., which have recently been required to be smaller and lighter. An object of the present invention is to provide a rotating electric machine that can solve the problem of reducing the size of the compressor by improving the method of winding a coil wound around the stator of a polar single-phase induction motor.

Conventionally, as shown in FIG. 4, the method of winding a rotary electric machine coil in this type of compressor is as follows: The main windings 9'b and 9c on the a and two-pole side B are respectively 5
The main winding 9'b on the bipolar side B,
9'c, the upper coil ends of the first and second main windings 9'c, which are close to the 1st pole side, are tilted toward the 1st pole side A. Then, the first and second main windings 9' of the main windings 9'b and 9'c on the two-pole side B
Compression elements such as cylinders and pistons were arranged at the upper coil end of the two-pole side B, which became a lower stage by tilting the upper coil end of C, and a compact compressor was constructed. However, in the above-described winding method for a rotating electric machine, the first and second main windings 9'c of the main windings 9'b and 9'c on the two-pole side B are connected to one pole. In order to tilt it to side A,
The coil circumference of the continuous and second main windings 9'c must be increased, and the copper loss increases by this length, and the main windings 9'b, 9' on the two-pole side B Due to the increase in leakage reactance at c, the effective magnetic flux passing through the stator 5 decreased, and the stall torque decreased.

In addition, as another winding method, one pole side of the main winding,
It is also conceivable to form 4 series on each of the 2 pole sides and tilt the series of main windings on either the 1 pole side or the 2 pole side towards the other pole side, but in this case, the 5th series Since there is no main winding, the third
Harmonics and fifth harmonics are likely to occur, resulting in a decrease in stall torque, resulting in a rotating electrical machine with poor performance.

The present invention has been made in view of these points,
One pole side of the main winding wound around the stator is formed into five series, and the other pole side is formed into four series, and among these four series of main windings, the series closest to the one pole side is formed. By forming the coil end so that it is tilted toward one pole, the above-mentioned drawbacks are solved.

Hereinafter, the present invention will be explained based on embodiments shown in the drawings.

Reference numeral 1 denotes a hermetic electric compressor which is formed by housing a compression element 3 in the upper part of a substantially spherical hermetic container 2 and a rotating electric machine 4 in the lower part thereof. The rotating electrical machine 4 consists of a stator 5 and a rotor 6, and drives the compression element 3 via a rotating shaft 8 that is fitted into the rotor 6 and supported by a bearing 7a of a frame 7. There is. Then,
The stator 5 is provided with 24 slots.
It has a main winding 9 and an auxiliary winding (not shown) wound in the slots of the stator, and the main winding 9a on one pole side A of the main winding 9 is arranged in five series. , 2-pole side B
The main windings 9b, 9c are formed into four series, and the series closest to the one pole side A among the four series main windings 9b, 9c, that is, the first series main winding 9c. The upper coil end is tilted toward one pole side A.

The method of winding a rotating electric machine coil according to the present invention, which achieves such a configuration, consists of five main windings 9a on one pole side A of the main winding 9 wound around the stator 5, and a two-pole winding method. The main windings 9'b, 9'c on side B are formed into four series, and among these four main windings 9'b, 9'c, the series closest to the one pole side A is Since the upper coil end of the main winding 9c is molded so as to be tilted toward the single pole side A,
Since there is no need to increase the coil circumference of the main winding 9c as in the conventional case, an increase in copper loss can be prevented. The third harmonic minimizes the leakage reactance, prevents a decrease in the effective magnetic flux passing through the stator 5, and prevents the appearance of the third and fifth harmonics.
It is an object of the present invention to provide a rotating electric machine that can maintain the stall torque as shown in the figure and can cope with downsizing of a compressor without any performance problems.

As described above, the method for winding a rotating electric machine coil of the present invention has a stator and a rotor, and is wound around the stator to form electromagnetic poles facing each other in the diametrical direction of the rotor. In a rotating electric machine having a main winding and an auxiliary winding arranged in
The main windings are formed in series, and the coil end of the series closest to the one pole side of the four series main windings is tilted toward the one pole side. Without increasing the circumference of the tilted main winding, the stator main winding can be shaped into a stepped shape that is compatible with the downsizing of compressors, increasing the copper loss of the main winding.
The present invention provides a rotating electrical machine with good performance by preventing leakage reactance and maintaining effective magnetic flux passing through the stator.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of a compressor equipped with a rotating electric machine formed by the winding method of the present invention, and
B is an explanatory diagram of a winding method showing an embodiment of the present invention;
Fig. 3 is a characteristic diagram showing the torque-rotation speed of a rotating electrical machine formed by the winding method of the present invention, A and B in Fig. 4 are explanatory diagrams of the winding method showing a conventional example, and Fig. 5 is a conventional FIG. 3 is a characteristic diagram showing the torque-rotation speed of a rotating electric machine formed by the winding method of FIG. 4... Rotating electric machine, 5... Stator, 6... Rotor, 9... Main winding.

Claims (1)

[Claims] 1. A rotating electric machine having a stator and a rotor, and having a main winding and an auxiliary winding wound around the stator and arranged to form electromagnetic poles facing each other in the diametrical direction of the rotor. The main windings wound around the stator are formed into 5 series on one pole side and 4 series on the other pole side, and among the 4 series of main windings, the above-mentioned 1
A method of winding a rotating electric machine coil, characterized in that the coil end of the series closest to the pole side is formed by tilting toward one pole side.