Switched reluctance motor with good positioning performance

Abstract

The invention discloses a switched reluctance motor with good positioning performance. The switched reluctance motor is characterized in that the phase number of the motor is more than 2, and each phase of magnetic circuits is independent and at low mutual coupling; due to the special structure of a rotor salient pole, the reset torque of a motor rotor has the regular torque-angle characteristicsof sine wave when constant current passes through a phase winding; split phase control of the phase winding can be realized when a stator winding is driven; the rotor salient pole has a bigger pole-arc angle which is approximately one half of the polar moment of the rotor salient pole; and meanwhile, an air gap between the rotor salient pole and a stator salient pole is enlarged and the magnetic density in the air gap is reduced as the rotor salient pole and the stator salient pole deviate from the central line, and the two sides of the air gap are symmetrical to each other. The special structures of the stator and the rotor of the switched reluctance motor ensure the independence of each phase of magnetic circuits, low mutual coupling, small harmonic component, strong load capacity and direct split phase control.

Description

technical field [0001] The invention relates to a switched reluctance motor, which has excellent positioning and moment angle characteristics, so the positioning performance is good. Specifically, it relates to a switched reluctance motor with good positioning performance through the special design of the salient pole structure of the rotor. Background technique [0002] In a general N-phase switched reluctance motor, corresponding to the logarithm K of the salient poles of each phase of the stator, the number of salient poles of the stator / rotor is 2KN / [2K(N-1)], and they are evenly distributed on the circumference. The phase arc angle of the salient poles of the stator is about The pole arc angle ratio of rotor salient poles slightly larger, the pole pitch of the salient poles of the rotor is In addition, the inner diameter of the salient poles of the stator and the outer diameter of the salient poles of the rotor are two concentric circles, that is, as figure 1 It ...

AI Technical Summary

Problems solved by technology

As for the 4-phase switched reluctance motor, at present, the four phase windings are connected together at one point, and two half-bridge power inverter circuits and current sensors are used, so the phase separation control cannot be directly performed.

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