KR20040042036A - Rotor for switched reluctance motor - Google Patents

Abstract

PURPOSE: A rotor for switched reluctance motor is provided to reduce noises when rotating and reduce vibration due to the unbalance of rotation. CONSTITUTION: A rotor for switched reluctance motor comprises a rotating axis(21), a core body(11), and a resin filling molding unit(31). The core body is formed by stacking a plurality of steel sheets having an axis hole and a plurality of salients. The resin filling molding unit is molded by filling synthetic resin between the salients of the core body.

Description

ROTOR FOR SWITCHED RELUCTANCE MOTOR

The present invention relates to a rotor of a switched reluctance motor, and more particularly, to a rotor of a switched reluctance motor capable of suppressing noise generation during rotation.

A switched reluctance motor (SRM) is driven in such a way as to instantaneously apply and extinguish a direct current voltage as a square wave pulse to a stator field structure.

These switched reluctance motors are easy to manufacture due to their simple structure, high efficiency over a wide range of speeds and torques, and easy to control speed and torque, reverse operation and regenerative braking. However, the torque pulsation is large due to the change of the instantaneous electromagnetic force due to the stator structure, the position sensor is required, and the vibration and noise are severe.

The switched reluctance motor includes a stator having a salient pole protruding toward an inner center and forming a stator field, and a rotor having only a salient pole projecting outward.

1 is a perspective view of a rotor of a conventional switched reluctance motor, and FIG. 2 is a plan view of the steel plate of FIG. 1. As shown in these figures, the rotor of the switched reluctance motor includes a rotating shaft 121 disposed at the center and a core body 111 formed by insulating lamination of the steel plate 112. The core body 111, the shaft hole 114 is formed in the center so that the rotary shaft 121 is inserted into the center, a plurality of protrusions 116 having a plurality of protrusions protruding outward in the radial direction on the outer peripheral surface Steel sheets 112 are formed by insulation lamination.

However, in the rotor of the conventional switched reluctance motor, when the rotor is rotated at a high speed, the noise caused by the salient pole 116 is increased substantially in proportion to the speed, causing a very loud noise.

In addition, there is a problem that excessive vibration and noise due to rotational unbalance during high speed rotation are generated.

It is therefore an object of the present invention to provide a rotor of a switched reluctance motor that can suppress the generation of noise during rotation.

1 is a perspective view of a rotor of a conventional switched reluctance motor,

2 is a plan view of the steel plate of FIG.

3 is a perspective view of a rotor of a switched reluctance motor according to an embodiment of the present invention;

4 is a half sectional view of FIG. 3;

5 is a cross-sectional view of FIG. 3,

6 is a plan view of the steel plate of FIG. 3.

Explanation of symbols on the main parts of the drawings

11 core body 12 steel sheet

14 axial ball 16: stone pole

18: departure preventing protrusion 21: the rotating shaft

31: resin filling molding 41: end ring

The object is, according to the present invention, a rotating shaft; A core body formed by stacking a plurality of core steel plates having a axial hole penetrated so that the rotating shaft can be inserted in the center thereof, and a plurality of core poles protruding in the radial direction and spaced apart from each other in the circumferential direction; It is achieved by a rotor of a switched reluctance motor, characterized in that it consists of a resin filling molding which is formed by filling a synthetic resin between the protrusions of the core body.

Here, it is preferable that the side of the protrusion is formed with a departure preventing projection protruding horizontally in the protruding direction of the protrusion to prevent the separation of the resin filled molding.

It is effective to further include an end ring disposed on both sides of the core body along the rotation axis direction of the core body to correct the rotation imbalance during rotation.

The end ring is preferably formed of a synthetic resin integrally with the resin filling portion.

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the present invention.

3 is a perspective view of a rotor of a switched reluctance motor according to an embodiment of the present invention, FIG. 4 is a half sectional view of FIG. 3, FIG. 5 is a cross sectional view of FIG. 3, and FIG. 6 is a plan view of the steel plate of FIG. 3. to be. As shown in these figures, the rotor of the switched reluctance motor is rotatably coupled integrally to the core main body 11 having a plurality of salient poles 16 formed on an outer circumferential surface thereof, and to an axis of the core main body 11. And a resin filling molding portion 31 formed by filling a synthetic resin member between the rotating shaft 21 and the protrusion 16 of the core body 11.

The core body 11 is formed by insulation laminating a plurality of steel sheets 12, the shaft hole 14 is formed through the center of each steel plate 12 so that the rotation shaft 21 can be inserted.

On the outer circumferential surface of each steel plate 12 is formed a plurality of protrusions 16 are arranged along the circumferential direction so as to protrude along the radial direction and form an equiangular interval therebetween, between each of the protrusions 16 The resin filling part 31 is formed of a synthetic resin member so as to fill the space formed therebetween. The resin filling molded part 31 is formed so that the center part may have a concave downward curved shape.

On both sides of each of the salient poles 16, the anti-separation protrusions 18 protruding horizontally in the projecting direction of the salient poles 16 are respectively provided so that the resin filled molding part 31 is not separated from the core body 11 by centrifugal force. Protrudingly formed, each of the separation prevention projections 18 is formed to be inclined rearward with respect to the protruding direction of each of the protrusions (16).

On the other hand, both side ends of the core body 11 along the axial direction of the rotary shaft 21 so as to resolve the rotational imbalance of the core body 11 and the resin filling molding 31 that rotates around the rotary shaft 21. Disc shaped end rings 41 are each formed, and each end ring 41 is formed of a synthetic resin member integrally with the resin filling molding part 31.

By this configuration, the steel sheets 12 are insulated and stacked along the rotation axis direction, and the resin filling molding part 31 is formed between the protrusions 16 with the synthetic resin member, and the core body 11 is formed. End rings 41 are formed at both side ends of each.

When the rotor is rotated about the rotating shaft 21, the resin filling molding 31 formed to fill the gap between the adjacent poles 16, guides the flow of air before and after the rotating poles 16, the noise It is to suppress the occurrence, the end ring 41 is to compensate for the rotational imbalance to reduce the vibration and noise caused by it.

In the above-described and illustrated embodiments, the case in which the escape preventing protrusions protruding horizontally in the protruding direction of the protrusions are formed on both sides of each protrusion, for example, but may be configured in plural, so as to form an uneven surface. It can also consist of many.

As described above, according to the present invention, it is formed by insulating laminating a rotating shaft, a steel plate having a plurality of protrusions radially protruded in the radial direction and spaced apart from each other in the center hole and the outer peripheral surface so as to be inserted into the rotating shaft A rotor of a switched reluctance motor capable of suppressing the generation of noise during rotation is provided by providing a resin-filled molding part filled and molded with a synthetic resin member in a space between the core body and each salient pole.

In addition, according to the present invention, by further comprising an end ring disposed on both sides of the core body along the rotation axis direction to correct the rotation imbalance, the switched reluctance that can reduce the vibration and noise caused by the rotation imbalance The rotor of the motor is provided.

Claims (4)

A rotating shaft; A core body formed by stacking a plurality of core steel plates having a axial hole penetrated so that the rotating shaft can be inserted in the center thereof, and a plurality of core poles protruding in the radial direction and spaced apart from each other in the circumferential direction; The rotor of the switched reluctance motor, characterized in that it is composed of a resin filling molding which is formed by filling a synthetic resin between the protrusions of the core body. The method of claim 1, The rotor of the switched reluctance motor, characterized in that the side of the protrusion is projected in the projection direction of the protrusion pole transversely to prevent the separation of the resin filled molding formed. The method according to claim 1 or 2, The rotor of the switched reluctance motor, characterized in that it further comprises an end ring disposed on both sides of the core body along the rotation axis direction of the core body to correct the rotation imbalance during rotation. The method of claim 3, The end ring is a rotor of the switched reluctance motor, characterized in that formed with a synthetic resin integrally with the resin filling molding.