JPH04207942A - Capacitor start-run motor - Google Patents

Abstract

PURPOSE:To lower the coil end of a coil low for making a motor thin by forming a primary or auxiliary coil on each of the twelve teeth of a stator core by direct winding. CONSTITUTION:A coil is formed on each tooth 2 of a stator core 1 by direct winding. At that time, the coils formed on the teeth 2, 2 which are next to each other are first primary coils 20 and the coils formed on the teeth 2, 2 which are opposite to the first primary coils 20 are second primary coils 21 have the same polarity as the first primary coils 20 and the coils formed on the tooth 2 which is two teeth removed from the first primary coil 20 is a third primary coil 22 which has opposite polarity to the first and second primary coils 20, 21 and the coils formed on the tooth 2 which is opposite to the third primary coil 22 is a fourth primary coil 23 which has the same polarity as the third primary coil 22. The coils which are formed on the rest of the teeth 2 are first, second, third and fourth auxiliary coils 24-27. These auxiliary coils 24-27 are formed in like manner as the primary coils 20-23. Consequently, an coil end of each coil is low and therefore the length of a motor in the rotation direction can be shortened and eventually the motor can be made thin.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a capacitor induction motor having a main winding and an auxiliary winding used in air conditioners, etc., and more specifically relates to a capacitor that can be made thinner. It relates to induction motors.

"Conventional Example" Generally, the stator core of a capacitor induction motor is provided with a main winding and an auxiliary winding, and an inserter method (concentric winding method) is used as a method for forming the main winding and auxiliary winding. For example, in the case of a stator core 1 with 16 slots as shown in FIG. forming a wire 4, and similarly two main windings 5,
form 6. After that, the tooth 2 on which the main winding is not formed, that is, the tooth 2 on both sides of the tooth 2 between the two main windings 3 and 4.
. In this case, the main windings 3 and 5 and the main windings 4 and 6 that face each other have the same polarity, and the main windings 3 and 5 and the main windings 4 and 6 have different polarities, and are opposite to each other. The auxiliary windings 7 and 9 and the auxiliary winding 8
, 10 are each of the same polarity, and the auxiliary l! 7.9
and the auxiliary windings 8 and 10 have different polarities. In addition, main windings 3 and 5
and the auxiliary windings 7 and 9 have the same polarity, and the main windings 4 and 6 and the auxiliary winding 8
．． 10 is the same polarity.

In the case of the above inserter method (concentric winding method), the main winding [
3, 4, 5, 6 and the auxiliary 1g 7, 8, 9, 10 are wound. For example, the main winding @ 3, 4, 5, 6 is inserted into the slot 2a of the stator core 1 with an inserter, and the predetermined tooth 2 is inserted. After that, auxiliary windings 7, 8, 9 are formed in sequence.
．． 10 into the groove (slot) of stator core 1 with the inserter
2a and sequentially form the predetermined teeth 2. And each main winding 3, 4, 5, 6 and auxiliary winding 7, 8, 9.10
Shape and connect the lead wires so that they form a series. After that.

The connected portions will be insulated and bound, and then varnished.

As shown in FIG. 5, the stator core 1 on which the main winding and the auxiliary winding are formed is housed in a bracket 11, and a circular opening 12 in the center of the stator core 1 has a rotating shaft 13.
A rotor 14 having a
One side is supported by the end bracket 15 and the bearing part 16, and the other side is supported by the bearing part 17.

[Problem to be solved by the invention] However, in the above capacitor induction motor,
When forming the main winding l1A5 and the auxiliary winding 6 using the inserter method, the main winding and the auxiliary winding are wound in advance, and the main winding and the auxiliary winding are inserted into predetermined teeth of the stator core. , the coil ends of the main winding and auxiliary winding are inevitably high, and the axial dimension (hi in Fig. 5) becomes long, making it difficult to reduce the thickness of the winding.For example, it is used in air conditioners, etc. In this case, there was a problem that the space inside the air conditioner could not be used effectively.

Furthermore, when forming the main winding and auxiliary windings on the stator core with the 16 slots mentioned above using the inserter method, the main winding must first be formed, then the auxiliary winding must be formed inside it, and then it must be shaped. However, there were problems in that the number of steps involved increased and the processing cost increased.

This invention was made in view of the above problems.

The purpose is to shorten the axial dimension of the induction motor and make it thinner.
It is an object of the present invention to provide a capacitor induction motor that is highly efficient, reduces the number of processes and man-hours, and enables cost reduction.

[Means for Solving the Problems] In order to achieve the above object, in a capacitor induction motor having a 12-slot stator core according to the present invention, a winding is formed on each tooth, and a winding is formed on two adjacent teeth. The direct winding is made the first main winding, and the direct winding formed in two teeth opposite to the first main winding is made the first main winding with the same polarity as the first main winding. 2 main winding, and the above 1st winding.
The first winding is formed on the teeth two teeth apart from the main winding.
A third main winding with a different polarity from the main winding, and a winding formed on one tooth facing the third main winding with the same polarity as the third main winding. The fourth main winding is the same polarity as the first main winding, and the two-tooth winding between the first main winding and the third main winding is At the same time, the winding formed on the two opposite teeth of the first auxiliary winding is used as the second auxiliary winding with the same polarity as the first auxiliary winding. , a direct winding formed on a tooth that is one tooth apart from the first auxiliary winding is used as a third auxiliary winding having a different polarity from the first and second auxiliary windings, and the third auxiliary winding is The gist is that the winding formed on the teeth opposite to the auxiliary winding is used as the fourth auxiliary winding having the same polarity as the third auxiliary winding.

[Function] With the above configuration, when forming the main winding and the auxiliary winding on the 12-slot stator core, each winding has 12 slots.
However, if the performance of the stator core is approximately the same as that of the inserter method, the coil ends of the main winding and auxiliary winding will be small, and the rotation axis direction of the conductive motor will be short. Become. Furthermore, since it is only necessary to form a winding on each tooth of the stator core, the stator core can be manufactured with fewer steps and man-hours.

[Embodiments] Hereinafter, embodiments of the present invention will be described based on FIGS. 1 to 3. In the figure, the same parts and corresponding parts as in FIGS. 4 and 5 are denoted by the same reference numerals, and redundant explanation will be omitted.

FIG. 1 shows a partial diagram of a capacitor induction motor using a two-slot stator core 1. FIG.

In FIG. 1, a stator core 1 has a substantially circular shape, and a circular opening 12 for rotor insertion is formed in the center of the stator core 1. Teeth 2 extend toward the center of the circular opening 12. Twelve teeth are provided at equal intervals, and grooves (slots) 2a are formed between these teeth 2. Although not shown, insulating members (for example, insulators) having the same shape as the surface of the stator core 1 are attached to both sides of the stator core 1 for the purpose of insulation. Further, a winding is wound around each tooth 2 of the stator core 1 from above the insulating member.

In this case, the windings formed on the two adjacent teeth 2, 2 are made into the first main winding 20, and the windings formed on the two opposite teeth @2.2 are made into the first main winding 20. is made into the second main winding g21 having the same polarity as the first main winding 20, and the first main winding 2
The winding formed on the teeth 2 with two teeth 0 and 2 is made into a third main winding having a different polarity from the first and second main windings 1 m20.21,
The winding formed on the tooth 2 facing the third main winding 22 is a fourth main winding 4123 having the same polarity as the third main winding 22.

Further, the winding formed on the two teeth 2, 2 between the first main winding 20 and the third main winding 22 is made into a first auxiliary winding 24, and this first auxiliary winding 24 Two teeth facing each other 2,2
The winding formed in the second auxiliary winding 24 has the same polarity as the first auxiliary winding
The winding formed on the teeth 2 between the second main winding 21 and the third main winding 22 is the second auxiliary winding 25 of the second main winding 25.
The third auxiliary winding 26 has a different polarity from the third auxiliary winding 25, and the winding formed on the tooth 2 facing the third auxiliary winding 26 is the third auxiliary winding 26.
The fourth auxiliary winding 27 has the same polarity as the auxiliary winding 26 of the fourth auxiliary winding 27 . As a result, the spatial phase angle between the main winding and the auxiliary winding is 9
It becomes 8.9 degrees or 81.1 degrees.

In manufacturing the stator core of the above-mentioned four-pole capacitor induction motor, the stator core l shown in Fig. 2 is first formed by punching out a magnetic steel plate with a press machine, etc., and in reality, a plurality of punched core sheets are formed. Obtained by laminating. After insulating the stator core 1 with grooves using an insulator etc., the main windings 20, 21, 22, 23
and auxiliary NiA24°25.26.27.

Subsequently, the leads of each winding are connected. In this case, as mentioned above, for example, the N pole of the main winding is
It is formed by two pairs of teeth around which the main winding 20 and the second main winding 21 are wound, and its S pole is formed by the third main winding 22 and the fourth main winding 23 around it. It is formed by a pair of teeth. Further, similarly for the auxiliary winding, the N pole of the auxiliary winding is formed by two pairs of teeth.

Its south pole is formed by a pair of teeth.

Next, after insulating the connection part, binding processing is performed,
By performing the resin molding process, the coil winding process of the stator core 1 of the capacitor induction motor is completed. As shown in FIG.
A rotor 14 having a rotating shaft 13 is disposed in the circular opening 12 , one of which is supported by a bearing 16 on the bracket 15 side, and the other by a bearing 17 .

In this case, since the main windings 20, 21, 22, and 23 and the auxiliary windings 24, 25, 26, and 27 are only windings in the capacitor induction motor using the winding method described above, the conventional inserter method Since the coil end is lower than that of the coil end, the axial dimension (h2) can be made 10% to 30% shorter than the conventional dimension (shown in FIG. 5).

In addition, in the inserter method process, it is necessary to wind the main winding and auxiliary winding in advance, and after inserting the wound main winding and auxiliary winding with the inserter, Although it is necessary to shape the winding wire, the number of steps and man-hours required by the wire winding method of the present invention can be reduced, and manufacturing costs can be reduced.

Furthermore, stator core 1 using the conventional inserter method
If the number of grooves (slots) 2a is reduced, the spatial harmonic magnetic flux will increase, and if, for example, a steel plate bracket is used, vibration noise will increase, but in this invention, by molding the stator core 1 with 12 slots with resin, The vibration noise is reduced.

Note that the first to fourth main windings 20°21 of the above embodiment
, 22.23 and the first to fourth auxiliary windings 24, 25, 2
The same effect can be obtained even if 6.27 is formed in reverse.

Here, the performance of the winding capacitor induction motor produced by the above manufacturing process will be described. The dimensions of the 12-slot stator core 1 are, for example, an outer diameter of 84wn, an inner diameter (about the circular opening 12) of 42mm, and a width a of the teeth 2 of 4.7mm.

And, if the apparent number of turns wound around each tooth 2 is N, then
The effective number of turns Ne for each pole is 0.65N from the following equation (1).

Ne= N X ((25in30°X con30°
+5in30°・con30°)/2)・・・・・・・・・
(1) Also, if the thickness (laminated thickness) 1 of the stator core 1 is 20 swn, the circumference of each pole is 74. It becomes IN.

N X (4,7+ 1)X 2 X 3/2...
・・・・・・・・・(2) When the circumferential length of each effective number of turns is calculated using the above equations (1) and (2), 74. IN 10
．． 65N = 114, whereas in the case of the conventional inserter method, the stator core l with approximately the same external dimensions
If you use , the number of effective turns will be about 130. In other words, the director ratio of each effective number of turns is (114/130)
X100 valve becomes 88%, and the length of the copper wire per effective number of turns, that is, the weight, decreases.

In this way, the 12-slot stator core 1 of the present invention
In a capacitor induction motor using
, 25, 26, and 27, the length in the rotational axis direction can be made shorter than that of a capacitor induction motor in which the main winding and auxiliary winding are formed in the stator core 1 with 16 slots using an inserter method. In other words, since the thickness of the induction motor can be made thinner, there is an effect that, when used in an air conditioner, for example, a compact air conditioner can be realized.

[Effects of the Invention] As explained above, according to the present invention, in a capacitor induction motor having a stator core in which 12 teeth and slots are formed toward the center of a central circular opening, the windings are directly connected to each other. It is formed on each tooth and the adjacent 2
The windings with one tooth and two teeth opposite these teeth are the first and second main windings of the same polarity, and the teeth two teeth apart from the first main winding and the windings with two teeth opposite these teeth are used as the first and second main windings of the same polarity. The direct windings of the teeth are used as third and fourth main windings having different polarities from the first and second main windings, and the remaining tooth windings are used as auxiliary windings, and Since the first to fourth auxiliary windings are formed in the same manner as the fourth main winding, the coil ends of the main winding and auxiliary winding are lower than in the inserter method. , it is possible to shorten the length of the induction motor in the direction of its rotational axis, which in turn allows the induction motor to be made thinner, and the manufacturing costs are reduced because the processes and man-hours required for the main and auxiliary windings are reduced. It is possible to reduce the Furthermore, since it is possible to make the length of each effective number of turns of the main winding and auxiliary winding smaller than that of the inserter method, there is an effect that the number of nets used per effective number of turns can be reduced.

[Brief explanation of the drawing]

Fig. 1 is a schematic partial front view of a capacitor induction motor showing an embodiment of the present invention, Fig. 2 is a front view of a stator core used in the capacitor induction motor, and Fig. 3 is a schematic partial front view of a stator core used in the capacitor induction motor. FIG. 4 is a schematic front view of a stator core using a conventional inserter method, and FIG. 5 is a schematic side sectional view of a capacitor induction motor using the stator core of FIG. 4. In the figure, 1 is a stator core, 2 is a tooth, 2a is a groove (slot), 12 is a circular opening, 20 is a first main winding, and 21 is a second main winding.
, 22 is the third main winding, 23 is the fourth main winding,
24 is a first auxiliary winding, 25 is a second auxiliary winding, 26 is a third auxiliary winding, 27 is a fourth auxiliary winding, and 28 is a resin mold. Patent Applicant Fujitsu General Co., Ltd. Representative Patent Attorney Taku Ohara Figure 1 a Figure 3 Figure 5

Claims (2)

[Claims] (1) A stator core has a circular opening in the center for inserting the rotor, and 12 teeth and slots are formed at equal intervals toward the center of the circular opening, and a winding is formed on each tooth. In this case, the direct winding formed on the two adjacent teeth becomes the first main winding, and the direct winding formed on the two teeth opposite to the first main winding becomes the first main winding.
A second main winding of the same polarity as the main winding, and a third main winding of a different polarity from the first main winding. The main winding is made into a main winding, and a direct winding formed on one tooth facing the third main winding is made into a fourth main winding having the same polarity as the third main winding. , a two-tooth winding formed between the first main winding and the third main winding is used as a first auxiliary winding having the same polarity as the first main winding; A direct winding formed on two teeth facing the first auxiliary winding is a second auxiliary winding having the same polarity as the first auxiliary winding, and the first auxiliary winding and one The winding formed on the teeth separated from each other becomes a third auxiliary winding having a different polarity from the first and second auxiliary windings, and the winding is formed on the tooth opposite to the third auxiliary winding. A capacitor induction motor characterized in that a fourth auxiliary winding has the same polarity as the third auxiliary winding. (2) When configuring an induction motor by arranging a rotor in the circular opening, the stator core on which the main winding and the auxiliary winding are formed is resin-molded.
) described capacitor induction motor.