Switched reluctance motor and winding arrangement method therefor

Abstract

The invention provides a switched reluctance motor and a winding arrangement method therefor. The switched reluctance motor comprises an outer rotor, an inner rotor, a stator and windings, wherein the inner rotor is arranged in the outer rotor and coaxially rotates together with the outer rotor; the stator is located between the outer rotor and the inner rotor; the inner surface of the stator is provided with a plurality of stator inner teeth which protrude along the radial direction; the outer surface of the stator is provided with a plurality of stator outer teeth which protrude along the radial direction; a first groove is formed between two adjacent stator outer teeth (22); a second groove is formed between two adjacent stator inner teeth (21); the windings are wound on a stator yoke (24) of the stator; a first coil side of each winding is arranged in one first groove; and a second coil side is arranged in one second groove adjacent to the second groove in the same radial direction as the first coil side. The switched reluctance motor can effectively avoid the conjugate phenomenon of internal and external magnetic circuits of a double-rotor switched reluctance motor and improves the performance of the switched reluctance motor.

Description

technical field [0001] The invention relates to a switched reluctance motor and a winding arrangement method thereof. Background technique [0002] In an existing double-rotor switched reluctance motor, the stator has two salient poles in opposite directions in the radial direction, and concentrated windings are wound on the salient poles. The windings with opposite poles on the inner and outer surfaces are in the same phase, and the inner rotor and the The outer rotors are placed inside and outside the stator respectively. [0003] Another double-rotor switched reluctance motor, which includes an inner rotor, a stator and an outer rotor, separated from each other by an air gap, and the stator has two salient poles in opposite directions in the radial direction, and is wound on the salient poles There are concentrated windings, the stator yoke has a magnetic isolation ring in the circumferential direction, and the inner and outer windings are independent of each other. [...

AI Technical Summary

Problems solved by technology

[0004] For the above two double rotor switched reluctance motors, the slots formed by the adjacent salient poles are very wide, and the conductors in the slots are easy to slip out, which is extremely unsafe; The space of the winding mechanism leads to low slot fullness and low motor performance; under this magnetic circuit structure, the magnetic circuit is long, and the closed path of the magnetic circuit passes through the entire stator yoke and rotor yoke, resulting in a decrease in the magnetic potential occupied by the air gap, and It leads to an increase in iron loss; the existence of the spacer magnetic ring in the stator makes the inner and outer salient poles of the stator completely separated, and then assembled into a whole, the process is complicated and the assembly is difficult

[0005] In addition, in the above-mentioned dual-rotor switched reluctance motor, due to the conjugation phenomenon of the internal and external magnetic circuits, the magnetic force lines of the yoke are superimposed, resulting in a high magnetic density. In order to ensure the saturation caused by this conjugation phenomenon, the thickness of the yoke must be increased. ; When the inner diameter and outer diameter of the motor stator are determined, the slot area of ​​the stator will be reduced, the wire will be thinner, the winding resistance will increase, and the loss will increase

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