JP2001169517A - Capacitor motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a capacitor motor by which a winding specification and a capacitance, so as to obtain both best torque characteristics and best electromagnetic vibration characteristics in forward/reverse rotation. SOLUTION: A capacitor motor has a 2n-pole asymmetrical axis stator which is obtained by winding 4n coils on a stator with 6n slots, whose intervals are uniform. Both main coils 1 and auxiliary coils 2 are short-pitch coils. The main coils 1 and the auxiliary coils 2 are wound and arranged, so as to have respective winding directions equal to each other, with electrical angles of 60 deg.C. One sides of both main coils and the auxiliary coils are commonly contained in the same slots 3, and the other sides of both coils are individually contained in different slots 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a condenser motor capable of reversible operation.

[0002]

2. Description of the Related Art In a capacitor-advanced single-phase induction motor generally called a capacitor motor, a short-section main winding and an auxiliary winding are arranged at a stator iron core at an electrical angle of 90 degrees and wound symmetrically. As described in JP-B-41-11497, a short-pole main / auxiliary winding is arranged at a 120-degree electrical angle on a 12-slot stator core using a four-pole motor, and the torque is increased. There are asymmetric windings with improved characteristics.

[0003] A short-segment winding main winding and an auxiliary winding are mounted on a stator
As an example in which the windings are arranged at 0 degrees and wound symmetrically, there is a winding arrangement diagram of an electric motor shown in FIG. 5 and a wiring diagram shown in FIG. 6A. The motor shown in FIG. 5 has a stator core having 16 stator teeth and 16 slots at uniform intervals, and forming a four-pole symmetric shaft stator wound with eight windings. The windings are arranged so that the electrical angle is 90 degrees.

That is, as shown in the wiring diagram of FIG.
When the power supply is switched to the solid line side with respect to the polarity of the capacitor, the stator teeth (1) to (3) around which the auxiliary winding 2 is wound
Magnetic poles are generated at the stator teeth (1) to (5) where the main winding 1 is wound, and the stator teeth (1) to (16) are sequentially generated.
The rotating magnetic field moves from the right side to the left side of the wiring diagram. As a result, the rotor of the electric motor in FIG. 5 rotates clockwise.

When this motor is actually operated as a reversible type motor, each of the stator teeth (1) to (8)
FIG. 6B shows a change with time of the magnetomotive force (field magnetic flux) generated in ((9) to (16) is equal to (1) to (8)). As can be understood from this, the magnitude of the magnetomotive force (field magnetic flux) sufficient to obtain good torque characteristics can be secured, but the phase of the magnetomotive force between the stator teeth varies considerably.

As an example of a four-pole motor having an asymmetrical winding in which a short-section winding main / auxiliary winding is arranged at a 120-degree electrical angle on a 12-slot stator core and wound around a stator core to improve torque characteristics, FIG. 3 shows a winding arrangement diagram of FIG.
There are the following. The motor shown in FIG. 3 shows a four-pole asymmetric shaft stator in which eight windings are wound around a stator having twelve slots with a uniform slot interval. The main and auxiliary windings 1 and 2 have an electrical angle of 120 degrees, and the main winding 1 and the auxiliary winding 2 are wound and arranged so that the winding directions are opposite to each other. One winding side of each of the complementary windings is accommodated in the same common slot 3, and each of the other winding sides is individually accommodated in a separate slot 4.

[0007] The stator core of this example is a rounded stator core, and within 12 slots of the 4-pole stator core, a direction of 45 degrees to the width direction of the opposed linear portion, in other words, four corners of the core. The cross-sectional area occupied by the four slots 3 located at the rounded portions of the first and second windings is increased, and one of the winding sides of the main and auxiliary windings 1 and 2 is accommodated in this slot 3 as described above. The other eight winding slots 4 are individually accommodated in the eight slots 4 having a small cross-sectional area.

As shown in the wiring diagram of FIG. 4A, when the power supply is switched to the solid line side with respect to the polarity of the capacitor, the direction of the current flowing through the main winding 1 and the auxiliary winding 2 is changed. Are opposite to each other. Then, magnetic poles are generated on the stator teeth (1) and (2) around which the main winding 1 is wound, and then the auxiliary winding 2 wound in the opposite direction to the main winding 1 is wound. Stator (2),
A magnetic pole is generated in (3), and the rotating magnetic field sequentially moves from the right side to the left side of the wiring diagram to the stator teeth (1) to (12). As a result, the rotor (not shown) of the electric motor shown in FIG. 3 rotates clockwise.

When this motor is actually operated as a reversible type motor, each of the stator teeth (1) to (6)
FIG. 4B shows the change of the magnetomotive force (field magnetic flux) generated with time ((7) to (12) is equal to (1) to (6)), as shown in FIG. However, the magnitude of the magnetomotive force (field magnetic flux) can be secured, but the phase of the magnetomotive force between the stator teeth varies considerably.

[0010]

Most of these conventional capacitor motors assume only a unidirectional rotation load as an operating condition. Therefore, a reversible type motor for both forward and reverse rotations has a main winding. Wire diameter of wire and auxiliary winding,
It is necessary to make the specifications such as the number of turns the same, and it is difficult to design both the torque characteristics and the electromagnetic vibration characteristics at the best. In many cases, the torque characteristics are prioritized. Was larger than the electric motor. Accordingly, the present invention provides a robust, long-life, inexpensive reversible motor used for equipment that requires a forward / reverse rotation load, and has a winding specification and a capacitor value at which both torque characteristics and electromagnetic vibration characteristics are best. An object of the present invention is to provide a condenser motor that can be set.

[0011]

In a capacitor motor according to a first aspect of the present invention, when winding a winding having 4n coils on a stator core having 6n slots, a main / complementary winding is used. In each case, one winding side is stored in a common slot, and the other winding side is stored in a separate slot by itself.
2n by arranging the electrical angle of the main and auxiliary windings to be 60 degrees
A polar asymmetric shaft stator was formed and configured.

[0012] Thereby, it is possible to set the winding specification and the capacitor value so that the torque characteristics and the electromagnetic vibration characteristics at the time of forward / reverse rotation are both the best, and to reduce the noise of the equipment which requires the load of forward / reverse rotation. In addition, a robust, long-life and inexpensive capacitor motor that can prevent influence on other parts can be realized.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described based on embodiments with reference to the drawings. FIG. 1 is a winding arrangement diagram of the capacitor motor of the present invention, and FIG. 2A is a wiring diagram. The capacitor motor of the present invention is generally a 2n-pole motor having a rounded stator core, where n is a natural number, in which a 4n-coil winding is wound around a 6n-stator core. However, an embodiment will be described below with reference to a quadrupole electric motor having a rounded stator core with n = 2 as in the case of FIG.

The winding arrangement of the motor shown in FIG. 1 is a four-pole asymmetric shaft stator in which eight windings are wound on a stator having twelve slots having a uniform slot interval. Main winding 1 and auxiliary winding 2
In this example, both windings are short-section windings, the main and auxiliary windings 1 and 2 have an electrical angle of 60 degrees, and the main winding 1 and the auxiliary winding 2 have the same winding direction. And wound around. main·
One of the winding sides of the complementary windings 1 and 2 is housed in the same common slot 3, and the other winding sides are housed in separate slots 4 singly.

As in the case of FIG. 3, the rounded stator core has a 45-degree direction with respect to the width direction of the opposed linear portion in 12 slots in the 4-pole stator core, in other words, the core 4
The occupied cross-sectional area of the four slots 3 located at the rounded corners is formed large, and one of the winding sides of the main and auxiliary windings 1 and 2 is accommodated in the slot 3 as described above. The other slots of the main and auxiliary windings 1 and 2 are individually accommodated in the eight slots 4 having a small occupied cross-sectional area of the other portion.

Thus, as shown in the wiring diagram of FIG. 2A, when the power supply is switched to the solid line side with respect to the polarity of the capacitor, the direction of the current flowing through the main winding 1 and the auxiliary winding 2 Are in the same direction. Then, magnetic poles are generated on the stator teeth (1) and (2) around which the auxiliary winding 2 is wound, and then the stator teeth (2) and (3) around which the main winding 1 is wound. Magnetic poles are generated in the
The rotating magnetic field moves from the right side to the left side of the wiring diagram to the stator teeth (1) to (12). As a result, the rotor of the electric motor in FIG. 1 rotates clockwise.

When driving in the counterclockwise direction, it can be achieved by switching the power supply to the dotted line side with respect to the polarity of the capacitor. When this motor is actually operated as a reversible type motor, the magnetomotive force generated in each of the stator teeth (1) to (6) ((7) to (12) is equal to (1) to (6)) FIG. 2 (B) shows the change with respect to time. Compared to the magnetomotive force distribution of the stator teeth of the conventional electric motor shown in FIGS. 4 (B) and 6 (B), the present invention The variation in the magnitude of the magnetomotive force (field magnetic flux) of the capacitor motor was small, good torque characteristics could be obtained, and the phase of the magnetomotive force between the stator teeth was substantially uniform, and the variation was small.

In this way, by arranging the main winding and the auxiliary winding of the condenser motor, which is a reversible type motor having an asymmetric winding, at an electrical angle of 60 degrees, the stator teeth due to the current flowing through the main winding and the auxiliary winding are formed. The winding and the capacitor values can be set so that the magnetomotive force (field magnetic flux) becomes an almost ideal rotating magnetic field when the load is normal (slip is about 0 to 0.2). At this time, the winding specifications (main winding,
There is a capacitor value that minimizes the electromagnetic vibration for the same specifications as the auxiliary winding). By using this value, the winding specifications can be adjusted so that the torque characteristics and vibration characteristics can easily become the best points. Can be designed.

[0019]

As described above, according to the present invention, it is possible to set the winding specification and the capacitor value that make both the torque characteristics and the electromagnetic vibration characteristics at the time of the forward / reverse rotation the best, and to reduce the load of the forward / reverse rotation. It is possible to realize a robust, long-life and inexpensive capacitor motor capable of reducing noise during a normal rotation operation or a reverse rotation operation of required equipment and preventing an influence on other components.

[Brief description of the drawings]

FIG. 1 is a winding arrangement diagram of a capacitor motor of the present invention.

FIG. 2A is a wiring diagram of the capacitor motor of the present invention. (B) Magnetomotive force distribution of stator teeth of the capacitor motor of the present invention.

FIG. 3 is a winding layout diagram of a conventional capacitor motor.

FIG. 4A is a wiring diagram of a conventional capacitor motor. (B) Magnetomotive force distribution of stator teeth of a conventional capacitor motor.

FIG. 5 is a winding arrangement diagram of another conventional capacitor motor.

FIG. 6A is a wiring diagram of another conventional capacitor motor. (B) Magnetomotive force distribution of stator teeth of another conventional capacitor motor.

[Explanation of symbols]

 Reference Signs List 1 main winding 2 auxiliary winding 3 slot with large occupied cross section 4 slot with small occupied cross section

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Akira Matsumoto 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. F term (reference) 5H013 DD03 LL00 5H603 AA00 BB01 BB06 BB08 BB12 CA01 CA05 CB01 CC05 CC17 CD01 CD02

Claims (1)

[Claims] When a winding having 4n coils is wound around a stator core having 6n slots, each of the main and complementary windings has one winding side shared by a common slot. A capacitor motor wherein the other winding sides are individually housed in separate slots and arranged so that the electrical angle of the main and auxiliary windings is 60 degrees to form a 2n pole asymmetric shaft stator.