JPH089603A - Induction capacitor motor - Google Patents

Abstract

PURPOSE:The make the magnetic flux distribution closely a sine wave so as to reduce unnecessary vibrations, noise, and temperature rises by alternately providing paired deep grooves having large areas and paired shallow grooves and installing outside windings and inside windings to prescribed positions so that each three outside and inside windings can constitute one pole. CONSTITUTION:Along the inner periphery of the stator core 1 of a two-pole induction capacitor motor, 16 groove sections are formed of deep grooves having large areas 2b, 2c, 2f, 2g, 2j, 2k, 2n, 2o and shallow grooves having small areas 2a, 2d, 2e, 2h, 2i, 2l, 2m, and 2p. Then outside windings are wound between the grooves 2c and 2f, 2k and 2n, 2b and 2g, 2j and 2o, 2a and 2h, and 2j and 2p. Similarly, inside windings are wound between the grooves 2g and 2f, 2o and 2b, 2f and 2k, 2n and 2c, 2e and 21, and 2m and 2d so that each three outside windings and three inside windings can constitute one pole.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a capacitor induction motor, and more particularly to a stator core structure and a stator winding method.

[0002]

2. Description of the Related Art Conventionally, a stator core of a capacitor induction motor has a uniform groove area. Figure 5
The top view of the said stator core which has 16 groove parts is shown.
For example, as shown in FIG. 5, a stator core of a 16-slot two-pole capacitor induction motor has a groove 2 formed along the inner circumference of a stator core 1 and a groove adjacent to the outside of two adjacent grooves. The first outer winding is wound between the two outer windings, the second outer winding is wound between the outer groove portions, and the third outer winding is wound between the outer groove portions. Similarly, by shifting 4 grooves,
The first inner winding is wound between the groove portions adjacent to the outside of the two adjacent groove portions, the second inner winding is wound between the outer groove portions, and the outer groove portion A third inner winding is wound between the three inner windings, and each of the three outer windings and the inner winding constitutes one pole to form a stator. In this case, since the groove area is uniform, the sum of the conductor cross-sectional areas of the first outer winding and the second outer winding cannot be larger than the conductor cross-sectional area of the third outer winding, and the same applies to the inner winding. Therefore, the ampere-turn (hereinafter referred to as AT), that is, the magnetic flux distribution cannot be approximated to a sine wave. Therefore, unnecessary vibration,
There is a problem that performance is adversely affected, such as noise and temperature rise, which lowers the efficiency of the capacitor induction motor.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and makes the magnetic flux distribution of a capacitor induction motor close to a sine wave to prevent unnecessary vibration, noise and temperature rise. It is an object of the present invention to provide a capacitor induction motor having improved performance.

[0004]

In order to achieve the above object, in a two-pole capacitor induction motor having 16 grooves formed along the inner circumference of a stator core, the grooves are formed every two grooves. A large-area deep groove and a small-area shallow groove are arranged in pairs, and the first outer winding is wound between the large-area deep grooves that are adjacent to the outer sides of the two small-area shallow grooves. The second outer winding is wound between the large-area deep grooves, and the third outer winding is wound between the outer small-area shallow grooves. The first inner winding is wound between the large-area deep grooves adjacent to the outside of the small-area shallow groove, and the second inner winding is wound between the large-area deep grooves on the outside of the large-area deep groove. A third inner winding is wound between the outer shallow grooves having a small area, and each of the three outer windings and the inner winding constitutes one pole. Further, the sum of the numbers of turns of the first outer winding and the second outer winding is greater than the number of turns of the third outer winding, and the first inner winding and the second inner winding have the same number of turns. The number of turns is greater than the number of turns of the third inner winding. Furthermore, the ratio of the number of turns of the first outer winding, the number of turns of the second outer winding, and the number of turns of the third outer winding is such that the number of turns of the first inner winding and the number of second inner winding are The ratio of the number of turns to the number of turns of the third inner winding is approximately equal, and the ratio is approximately sin78.7.
The ratio is 5 °, sin 56.25 °, and sin 33.75 °. The ratio of the effective groove areas of the small area shallow groove and the large area deep groove is approximately sin 78.75 °.
And (sin 56.25 ° + sin 33.75 °). On the other hand, in a two-pole capacitor induction motor in which 16 grooves are formed along the inner circumference of the stator core, a pair of large groove deep grooves and small groove shallow grooves are arranged for every two groove portions. The first outer winding is wound between the small-area shallow grooves further outside of the two large-area deep grooves adjacent to the outside of the large-area deep groove, and between the large-area deep grooves on the outside. A second outer winding is wound on the first outer surface of the two large-area deep grooves adjacent to the outer side of the two large-area deep grooves. The inner winding is wound, and the second inner winding is wound between the large-area deep grooves on the outer side, and each of the two outer windings and the inner winding constitutes one pole. Characterize. The number of turns of the second outer winding is greater than the number of turns of the first outer winding, and the number of turns of the second inner winding is greater than the number of turns of the first inner winding. It is characterized by Further, the ratio of the number of turns of the second outer winding and the number of turns of the first outer winding is substantially equal to the ratio of the number of turns of the second inner winding and the number of turns of the first inner winding, and The ratio is approximately sin 78.75 ° and sin 56.2.
It is characterized by a ratio of 5 °. The effective groove area ratio of the large area deep groove and the small area shallow groove is approximately sin.
The ratio is 78.75 ° and sin 56.25 °. Further, the stator outer diameter of the large area deep groove is larger than the stator outer diameter of the small area shallow groove.

[0005]

According to the above construction, in a two-pole capacitor induction motor having 16 grooves formed along the inner circumference of the stator core, every two grooves are formed into a deep groove having a large area. A small area shallow groove is arranged, and a first outer winding is wound between the large area deep grooves adjacent to the outside of the two small area shallow grooves, and between the outside large area deep grooves. The second outer winding is wound, and the third outer winding is wound between the outer shallow grooves of the small area. The first inner winding is wound between the large-area deep grooves adjacent to the, and the second inner winding is wound between the large-area deep grooves on the outside of the large-area deep groove. A third inner winding is wound between the grooves, and each of the three outer windings and the inner winding forms one pole, and the first outer winding and the second outer winding are formed. The number of turns is the first And the sum of the numbers of turns of the first inner winding and the second inner winding is greater than the number of turns of the third inner winding. The ratio of the number of turns of the outer winding, the number of turns of the second outer winding, and the number of turns of the third outer winding is such that the number of turns of the first inner winding, the number of second inner winding, and the third inner It is almost equal to the ratio of the number of turns of the winding, and the ratio is approximately sin 78.75 ° and sin 56.25.
° and sin 33.75 °, and the ratio of the effective groove area of the shallow groove of the small area to the deep groove of the large area is approximately sin78.
75 ° and (sin 56.25 ° + sin 33.75 °)
On the other hand, in a two-pole capacitor induction motor in which 16 grooves are formed along the inner circumference of the stator iron core, a pair of large-area deep grooves and small-area shallow grooves are formed every two grooves. Grooves are arranged, and the first outer winding is wound between the small-area shallow grooves further outside of the small-area shallow grooves adjacent to the outside of the two large-area deep grooves. The second outer winding is wound between the deep grooves of the above, and the four small grooves are similarly displaced, and similarly between the small shallow grooves adjacent to the outside of the two large deep grooves, and between the small shallow grooves further outside. The first inner winding is wound around the first inner winding, and the second inner winding is wound between the large-sized deep grooves on the outer side of the first inner winding. , The number of turns of the second outer winding is greater than the number of turns of the first outer winding, and the number of turns of the second inner winding is greater than the number of turns of the first inner winding, And the ratio of the number of turns of the second outer winding and the number of turns of the first outer winding is substantially equal to the ratio of the number of turns of the second inner winding and the number of turns of the first inner winding, and The ratio is approximately sin78.75 ° and sin56.25 °, and the effective groove area ratio of the large-area deep groove and the small-area shallow groove is approximately sin78.75 ° and sin56.25 °.
And the stator outer diameter of the large area deep groove is made larger than the stator outer diameter of the small area shallow groove, so that the magnetic flux distribution of the capacitor induction motor is not close to a sine wave. You can kick.

[0006]

Embodiments of the present invention will be described in detail with reference to the accompanying drawings. The same parts as those in the conventional example have the same reference numerals. An embodiment of the present invention will be described in detail with reference to the accompanying drawings with respect to a 16-slot 2-pole capacitor induction motor.
FIG. 1 is a plan view of a stator core of the present invention. Sixteen groove portions are formed along the inner circumference of the stator core 1. Here, a pair of large-area deep grooves and small-area shallow grooves are arranged every two grooves, and the 16 grooves 2a, 2b, 2 are provided.
c, 2d, 2e, 2f, 2g, 2h, 2i, 2j, 2
Form a stator core having k, 2l, 2m, 2n, 2o, 2p. It should be noted that the large-area deep grooves are 2b, 2c, 2
f, 2g, 2j, 2k, 2n, 2o, and the small-area shallow grooves are 2a, 2d, 2e, 2h, 2i, 2l, 2m, 2
p.

FIG. 2 is a winding layout of the stator core of FIG. First, the first outer winding 3 is provided between the large-area deep grooves 2c and 2f adjacent to the outer sides of the two small-area shallow grooves 2d and 2e.
a is wound, the second outer winding 3b is wound between the large-area deep grooves 2b and 2g on the outer side, and the third outer side is wound between the small-area shallow grooves 2a and 2h on the outer side. Winding winding 3c, 4
Similarly, the first inner winding 4a is wound between the large-area deep grooves 2g and 2j adjacent to the outer sides of the two small-area shallow grooves 2h and 2i, and the large-area deep groove on the outer side is wound. The second inner winding 4b is wound between 2f and 2k, and the third inner winding 4c is further wound between the shallow grooves 2e and 2l having a small area outside thereof. Similarly, the first outer winding 3 is provided between the large-area deep grooves 2k and 2n adjacent to the outer sides of the two small-area shallow grooves 2l and 2m.
a is wound, the second outer winding 3b is wound between the large-area deep grooves 2j, 2o on the outer side, and the third outer side is wound between the small-area shallow grooves 2i, 2p on the outer side. Winding winding 3c, 4
Similarly, the first inner winding 4a is wound between the large-area deep grooves 2o and 2b adjacent to the outer sides of the two small-area shallow grooves 2p and 2a, and the large-area deep groove on the outer side is wound. The second inner winding 4b is wound between 2n and 2c, and the third inner winding 4c is further wound between the shallow grooves 2m and 2d on the outside of the second inner winding 4b. Here, each of the three outer windings and the inner winding constitutes one pole.

Further, the sum of the numbers of turns of the first outer winding and the second outer winding is greater than the number of turns of the third outer winding, and the first inner winding and the second inner winding. The total number of turns of the winding is larger than that of the third inner winding. Furthermore, the ratio of the number of turns of the first outer winding, the number of turns of the second outer winding, and the number of turns of the third outer winding is such that the number of turns of the first inner winding and the number of second inner winding are The ratio of the number of turns to the number of turns of the third inner turn is approximately equal, and the ratio is approximately sin 78.75 ° and sin 56.25.
The ratio of ° and sin 33.75 °. The ratio of this number of turns is
It is a value in which AT, that is, the magnetic flux distribution is almost proportional to the short-pitch winding coefficient that most approximates the sine wave. The ratio of the effective groove areas of the small area shallow groove and the large area deep groove is approximately sin 78.75.
And (sin 56.25 ° + sin 33.75 °).

On the other hand, FIG. 3 is a plan view showing another embodiment of the stator core of the present invention. 4 is a winding layout diagram of the stator core of FIG. Here, the 16 groove portions 2
a, 2b, 2c, 2d, 2e, 2f, 2g, 2h, 2
Form a stator core having i, 2j, 2k, 2l, 2m, 2n, 2o, 2p. In this embodiment, unlike the case of FIG. 1, the large-area deep grooves 2a, 2d, 2e, 2h, 2
i, 2l, 2m, 2p, and the small area shallow groove is 2b,
2c, 2f, 2g, 2j, 2k, 2n, 2o. First, a small area groove 2 further outside the two small area shallow grooves 2c and 2f adjacent to the outside of the two large area deep grooves 2d and 2e.
The first outer winding is wound between b and 2g, and the second outer winding is wound between the large-area deep grooves 2a and 2h on the outer side.
Similarly, the first inner winding is provided between the small-area shallow grooves 2g and 2j adjacent to the outer sides of the two large-area deep grooves 2h and 2i and further outside of the small-area shallow grooves 2f and 2k. The wire was wound, and the second inner winding was wound between the large-area deep grooves 2e and 2l on the outer side. Similarly, two large-area deep grooves 2l,
The first outer winding is wound between the small-area shallow grooves 2k and 2n adjacent to the outside of 2m and the small-area grooves 2j and 2o further outside thereof, and the large-area deep grooves 2i and 2p outside thereof are wound. A second outer winding is wound between the two, and the four small grooves are similarly displaced to similarly adjoin the two large-area deep grooves 2p, 2a having a small-area shallow groove 2o,
The first inner winding is wound between the shallow grooves 2n and 2c of the small area further outside of 2b, and the deep groove 2m of the large area outside thereof is formed.
A second inner winding was wound between 2d. Where each 2
The outer winding and the inner winding form one pole. Further, the number of turns of the second outer winding is greater than that of the first outer winding, and the number of turns of the second inner winding is greater than that of the first inner winding. Further, the ratio of the number of turns of the second outer winding and the number of turns of the first outer winding is substantially equal to the ratio of the number of turns of the second inner winding and the number of turns of the first inner winding, and The ratio is approximately sin 78.75 ° and sin 56.
The ratio was 25 °. The ratio of the number of turns is a value obtained by making AT, that is, the magnetic flux distribution, proportional to the short-pitch winding coefficient that most approximates the sine wave. The ratio of the effective groove areas of the large-area deep groove and the small-area shallow groove is approximately sin 78.75 ° and sin 56.25.
And the stator outer diameter of the large area deep groove,
It was made larger than the outer diameter of the stator of the shallow groove of the small area. By winding the stator winding closely to the stator core 1 as described above, the magnetic flux distribution of the capacitor induction motor can be approximated to a sine wave.

[0010]

As described above, according to the present invention, in a two-pole capacitor induction motor in which 16 grooves are formed along the inner circumference of the stator core, the groove parts are formed in pairs every two grooves. The deep groove of the area and the shallow groove of the small area are arranged, and the first outer winding is wound between the large grooves of the large area adjacent to the outer side of the two shallow grooves of the small area. The second outer winding is wound between the deep grooves, and the third outer winding is wound between the shallow grooves on the outside of the deep groove. The first inner winding is wound between the large-area deep grooves adjacent to the outer side of the shallow groove, and the second inner winding is wound between the large-area deep groove on the outside of the shallow groove. A third inner winding is wound between the small-area shallow grooves, and each of the three outer windings and the inner winding constitutes one pole, and the first outer winding and the second winding are formed. Outside volume The number of turns of the third outer winding is greater than the number of turns of the third inner winding, and the number of turns of the first inner winding and the second inner winding is greater than the number of third inner windings. And the ratio of the number of turns of the first outer winding, the number of turns of the second outer winding, and the number of turns of the third outer winding is such that the number of turns of the first inner winding and the second inner winding Is approximately equal to the ratio of the number of turns of the third inner winding, and the ratio is approximately sin 78.75 °, sin 56.25 ° and sin 33.75 °, and the small area shallow groove and large area The effective groove area ratio of the deep groove is about sin 78.75 ° and (sin 56.25 ° + si
n33.75 °) and a two-pole capacitor induction motor in which 16 grooves are formed along the inner circumference of the stator core. And a small-area shallow groove are arranged, and the first outer winding is wound between the small-area shallow grooves further outside of the small-area shallow grooves adjacent to the outside of the two large-area deep grooves, A second outer winding is wound between the large groove of the large area on the outer side, and the small area further outside of the shallow groove of the small area adjacent to the outer side of the two deep grooves of the large size is also displaced by 4 grooves. The first inner winding is wound between the shallow grooves, and the second inner winding is wound between the large-area deep grooves on the outer side of each of the two outer windings and the inner winding. One pole is formed, the number of turns of the second outer winding is greater than the number of turns of the first outer winding, and the number of turns of the second inner winding is that of the first inner winding. And the ratio of the number of turns of the second outer winding to the number of turns of the first outer winding is equal to the ratio of the number of turns of the second inner winding to the number of turns of the first inner winding. They are almost equal and the ratio is about sin 78.75 ° and sin 5
The ratio of the effective groove area of the deep groove of the large area and the shallow groove of the small area is approximately sin 78.75 ° and s.
Since the stator outer diameter of the large-area deep groove is larger than the stator outer diameter of the small-area shallow groove, the magnetic flux distribution of the capacitor induction motor is sinusoidal. You can approach the waves. As a result, it is possible to provide a capacitor induction motor with improved performance by preventing unnecessary vibration, noise, and temperature rise.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of a stator core of a capacitor induction motor of the present invention.

FIG. 2 is a winding layout diagram of an embodiment showing a winding state of a stator winding of the capacitor induction motor of the present invention.

FIG. 3 is a plan view showing another embodiment of the stator core of the capacitor induction motor according to the present invention.

FIG. 4 is a winding layout diagram of another embodiment showing a winding state of a stator winding of the capacitor induction motor of the present invention.

FIG. 5 is a plan view showing a stator core of a conventional capacitor induction motor.

[Explanation of symbols]

 1 Stator core 2a Groove a 2b Groove b 2c Groove c 2d Groove d 2e Groove e 2f Groove f 2g Groove g 2h Groove h 2i Groove i 2j Groove j 2k Groove k 2l Groove 1 2m Groove m 2n Groove n 2o Groove o Groove p 3a First outer winding 3b Second outer winding 3c Third outer winding 4a First inner winding 4b Second inner winding 4c Third inner winding

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yuji Kawai 1116 Suenaga, Takatsu-ku, Kawasaki City, Fujitsu General Ltd. (72) Inventor Koji Mori 1116 Suenaga, Takatsu-ku, Kawasaki City, Fujitsu General (72) Inventor Yuji Soma 1116 Suenaga, Takatsu-ku, Kawasaki-shi In Fujitsu General Limited

Claims (9)

[Claims] 1. A two-pole capacitor induction motor having 16 groove portions formed along the inner circumference of a stator core, wherein every two groove portions are deep groove of large area and shallow groove of small area. The first outer winding is wound between the large-area deep grooves adjacent to the outside of the two small-area shallow grooves, and the second outer winding is wound between the outer large-area deep grooves. Wrap the wire, and then wind the third outer winding between the small grooves on the outer side of the wire.
Similarly, the first inner winding is wound between the large-area deep grooves adjacent to the outer sides of the two small-area shallow grooves, and the second inner side is provided between the outer large-area deep grooves. Winding the winding, and further winding the third inner winding between the small shallow grooves on the outside,
A capacitor induction motor, wherein each of the three outer windings and the inner winding constitutes one pole. 2. The sum of the numbers of turns of the first outer winding and the second outer winding is greater than the number of turns of the third outer winding, and the first inner winding and the second inner winding. The capacitor induction motor according to claim 1, wherein the sum of the number of turns of the winding is greater than the number of turns of the third inner winding. 3. The ratio of the number of turns of the first outer winding, the number of turns of the second outer winding, and the number of turns of the third outer winding is such that the number of turns of the first inner winding and the second inner The ratio of the number of turns of the winding wire to the number of turns of the third inner winding is substantially equal, and the ratio is approximately sin7.
8.75 ° and sin 56.25 ° and sin 33.75 °
2. The capacitor induction motor according to claim 1, wherein 4. The ratio of effective groove areas of the small-area shallow groove and the large-area deep groove is approximately sin 78.75 ° (sin 56.2).
5. The capacitor induction motor according to claim 1, wherein the ratio is 5 ° + sin 33.75 °. 5. A two-pole capacitor induction motor having 16 groove portions formed along the inner circumference of a stator core, wherein every two groove portions are provided with a deep groove having a large area and a shallow groove having a small area. , And the first outer winding is wound between the small-area shallow grooves further outside of the two small-area shallow grooves adjacent to the outside of the two large-area deep grooves. A second outer winding is wound between the deep grooves, and the grooves are shifted by 4 grooves, and similarly, between the small shallow grooves adjacent to the outer sides of the two large deep grooves and between the small shallow grooves further outside. The first inner winding is wound, the second inner winding is wound between the large-area deep grooves on the outer side, and each of the two outer windings and the inner winding forms one pole. Capacitor induction motor characterized by 6. The number of turns of the second outer winding is greater than that of the first outer winding, and the number of turns of the second inner winding is greater than that of the first inner winding. The capacitor induction motor according to claim 5, wherein 7. The ratio of the number of turns of the second outer winding and the number of turns of the first outer winding is approximately equal to the ratio of the number of turns of the second inner winding and the number of first inner windings. And the ratio is about si
6. The capacitor induction motor according to claim 5, wherein the ratio is n78.75 ° and sin56.25 °. 8. The effective groove area ratio of the large area deep groove and the small area shallow groove is approximately sin 78.75 ° and sin 56.25.
6. The capacitor induction motor according to claim 5, wherein the ratio is a ratio of °. 9. The capacitor induction according to claim 1, wherein the outer diameter of the stator of the large area deep groove is larger than the outer diameter of the stator of the small area shallow groove. Electric motor.