JPS58198153A - Winding method for 2-pole single-phase induction motor coil - Google Patents

Abstract

PURPOSE:To reduce the size of a compressor by forming the 1-pole side of a main coil which is wound on a stator in 5 series and the other pole side in 4 series, and tilting the end of the 4-series main coil to the 1-pole side. CONSTITUTION:The main coil 9a of a 1-pole side A of a main coil 9 which is mounted in the slots of a stator 5 is formed in 5 series, and the main coils 9b, 9c of the 2-pole side B are formed in 4 series. The series which is nearest to the 1-pole side A of the coils 9b, 9c, i.e., the upper coil end of the coil 9c which is wound in the 13rd and 24th slots is tilted to the 1-pole side. Further, the effective number of coils of the coils 9b, 9c is lessened within a range of 10% at the ratio of the effective number of coils as compared with that of the coil 9a. According to the above winding method, the coil end of the remaining 4-series main coil can be simply reduced and molded in the number of stages without losing the characteristics of a motor, thereby reducing the size of a compressor.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in the winding method of a two-pole single-phase induction motor coil. To provide a two-pole single-phase induction motor that meets the problem of miniaturizing the compressor by improving the winding method of a coil wound around the stator of the two-pole single-phase induction motor housed in the compressor. The purpose is to

Conventionally, the method of winding a two-pole single-phase induction motor coil in this type of compressor is to wind the coil using 24 slots provided in the iron core of the stator (5), as shown in (a) and (b) of Fig. 1. The main winding (91) with a wire diameter of 0.90 is formed in 5 series so that the effective number of turns is equal to each other, and The main winding (9'b) on the pole side (2)
) (9'c), the 1st and 2nd main windings (9c) closer to the 1st pole side, i.e. the 13th, 24th, 1
The upper coil ends of the main windings wound in the 4th and 23rd slots were tilted toward the single pole side. Then, one of the main windings (9b) (9C) on the two-pole side (6)
By tilting the upper coil ends of the continuous and second main windings (9'c), a cylinder is attached to the upper coil ends of the remaining main windings (9b) on the two-pole side (6), which has become a low stage. ,
Compression elements such as pistons were arranged to create a compact compressor.

In the winding method as described above, the main winding (9) is divided into a single-pole side main winding (9'a) and a two-pole @(6) main winding (9'a) in order to improve the motor characteristics. 'b) (9'c) are formed in five series so that each effective number of turns is equal, but the main winding (9b) (
Since the main windings (9C) of the first and second stations in 9c) are tilted toward the single pole side, the coil director of the first and second main windings (9c) as a result becomes longer, the copper loss increases for this length, and the effective magnetic flux passing through the stator (5) decreases due to the increase in leakage reactance in the remaining main winding (9b) of the two-pole 9411 (2). Because of the problem of not being able to obtain the target stalling and torque, the main winding wound around the stator is formed into 5 windings on one pole side and 4 windings on the other pole side, and the main winding of these 4 windings is Among the windings, the above 1
The coil end of the series closest to the pole side is tilted toward the single pole side, and the effective number of turns of the 4 series main winding is 10% of the effective number of turns of the 5 series main winding. The above-mentioned drawbacks can be solved by forming a small amount within the range of .

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

(1) is a hermetic electric compressor formed by housing a compression element (3) in the upper part and an electric motor (4) in the lower part of a substantially spherical hermetic container (2). The electric motor (4) consists of a stator (5) and a rotor (6), and has a rotating shaft () fitted into the rotor (6) and supported by a bearing (7a) of a frame (7). 8
) is used to drive the compression element (3).

On the other hand, the stator (5) of the electric motor (4) is provided with 24 slots, in which the wire diameter is g.
A main winding (9) of 0.85 mm and an auxiliary winding (not shown) are wound. The main winding (9) is the main winding # (
9a) into five series, and the main winding (2) on the two-pole side (2).
9b) (9c) are molded into 4 series, and this 2-pole side (2
) of the main windings (9b) (9c) of the series closest to the one pole side (4), that is, the upper part of the main winding (9c) of the series wound in the 13th and 24th slots. 1 coil end
It is made up of people who lean toward the extreme side. Here, the prisoner main windings (9a) formed into five series are the 1st and 12th, the 2nd and 11th, the 3rd and 1C, the 4th and 9th, and the 5th and 12th.
The main winding (9
The number of turns (hereinafter abbreviated as T) of a) is sequentially 50T, 54T, 3
7T133T.

28T and the number of slots is 24, the value of the effective number of turns A expressed by the following formula (%) is 159.6T, and the main winding on the two-pole side (6) formed in four rows. The wires (9b) and (9c) are the main windings (9b) \B= which are wound in the 13th and 24th slots, the 14th and 23rd slots, the 15th and 22nd slots, and the 16th and 21st slots. 0.991α, +0.924 false+〇, 793α.

+0.609α.

(However, α, = 50. α, = 54. α, = 37
The value of the effective number of turns B expressed as ゜false=33) is set to 148.97,
The effective number of turns B (148, 9T) of the main windings (9b) (9c) formed into four series is set to the main windings formed into five series &
The effective number of turns A (159,6T) in (9a) is reduced within the range of 10% (6,7%), and the 50T main winding wound in the 13th and 24th slots ( 9c
) is constructed by tilting the upper coil end towards the single pole side. Due to this tilted main winding (9c), the compression element (3) 4
- It is arranged.

According to the motor coil winding method of the present invention, which has such a configuration, one of the main windings (9) wound in the slots of the stator (5) is # (9a) is formed in 5 series, and the main windings (9b) (9c) on the two-pole side (2) are formed in 4 series, and among these 4 series main windings (cab) (9c), 1-pole m1ll (The upper coil end of the main winding (9C) wound in the series closest to Al, that is, the 13th and 24th slots, is tilted toward the 1-pole side, so It is no longer necessary to increase the coil circumference of the tilted main winding as in the past, and an increase in copper loss can be prevented. ) to minimize leakage reactance in the stator (5)
In addition, the effective number of turns B of the four main windings (9b') (9c) is reduced to five main windings. Line (9a
) is set so that the ratio of both effective turns is less than the effective number of turns A within the range of 10%.
) and Figure 6 (/, ;10%) show that the torque-rotation speed test results show that the main winding (9 )
In addition to reducing the wire diameter of the main winding (9a) and the
A limit value is obtained that allows changing the effective number of turns A, B of each of the main windings (9b) (9c) of the series, and as described above, the effective number of turns A, B of the main windings (9b) (9c) of the series of 4 series can be changed. The number of turns B can be made smaller than the effective number of turns A of the five main windings (9a),
In addition, the coil end volume (coil cross-sectional area x number of turns) of the main winding (9c) of the main winding (9c) closest to the one pole side among the four main windings (9b) (9c) can also be made smaller. , said 4
It is easy to tilt the upper coil end of the main winding (9C) of the main winding (9C) of the main winding (9C) of the series closest to the first pole side (2) to the one pole side of the main winding (9b) (9c) of the series, and the electric motor Without impairing the characteristics of (4), the upper coil end of the remaining four main windings (9b) is made into a lower stage without unreasonable shaping, making it compatible with the miniaturization of compressors. A phase induction motor is obtained.

As described above, the present invention forms five main windings on one pole side and four main windings on the other pole side to be wound in the slots of the stator core, and among the four main windings, 2, which is formed by tilting the coil end of the series closest to the one pole side to the one pole side.
In a different phase induction motor, the effective number of turns B of the four main windings is determined by the effective number of turns A of the five main windings, and the ratio of the effective number of turns is 4.
is reduced within 10%, so it is easy to tilt the upper coil end of the main winding of the chain closest to the 1st pole side of the 4 sets of main windings to the 1st pole side. Then,
In addition, the upper coil ends of the remaining four main windings can be easily formed into a lower stage without impairing the characteristics of the motor, making it possible to provide a two-phase induction motor that is compatible with the miniaturization of compressors. be.

[Brief explanation of the drawing]

The mark (b) in Fig. 1 is an explanatory diagram showing the conventional winding method and a front view of the electric motor, Fig. 2 is a vertical cross-sectional view of a hermetically sealed electric compressor showing an embodiment of the present invention, and Fig. 3 1 is an explanatory diagram of a winding method showing an embodiment of the present invention, and FIGS. 4 and 5 are torque-rotational speed characteristic diagrams of an electric motor showing experimental data according to the present invention. (4)...Electric motor (5)...Stator (9)...
・Main winding 14111 rotational recovery (rP town

Claims (1)

[Claims] (1) One pole side of the main winding wound in the slot of the stator core is formed into five windings, and the other pole side is formed into four windings, and these four
In a two-pole single-phase induction motor formed by tilting the coil end of the series of main windings closest to the one-pole side toward the one-pole side, the main windings of the four series A method for winding a two-pole single-phase induction motor coil, characterized in that the effective number of turns B is less than the effective number of turns A of five main windings within a range of 10% of the ratio λ of the effective turns φ.