Electric excitation permanent magnet switch, electric excitation permanent magnet switched reluctance motor and electric excitation method

摘要

Two magnetic poles of a permanent magnet of a permanent magnet switch and the two ends of an iron core wound with an excitation coil are connected to each other with the soft magnet having a salient pole. A motor uses the switch as the basic component of the stator and rotor, with two magnetic salient poles of each component being arranged axially, wherein the salient pole of the stator component and that of the rotor component are arranged in an opposite manner with an air gap, the excitation coil of the stator component and the rotor component at the symmetric axis position is taken as a phase line to access an excitation control power supply after serial connection or parallel connection. Electric excitation is carried out on the combined motor formed by shaft connection and rotation dislocation among single motors and the stator component in a bi-phase way simultaneously.

主权项

1. An electric excitation method for an electric excitation permanent magnet switched reluctance motor having a rotor, position sensors, an excitation control power source and a stator having even number of stator switch components, the method comprising:
supplying power by the excitation control power source to M phase lines on the stator in sequence and cyclically; stopping power supplying by the excitation control power source to phase (M−1) in a time period TMstator during which the excitation control power source supplies power to phase M of the stator switching component, wherein moment t1stator on and moment t (M−1)stator off are both in the time period TMstator, where t (M−1)stator off is a moment of the excitation control power source stopping the power supplying to phase (M−1) of the stator, t1stator on is a moment of the excitation control power source starting the power supplying to phase 1 of the stator, and Δtstator=t (M−1)stator off−t1stator on is a time difference between t1stator on and t (M−1)stator off; only when Δtstator is not zero, simultaneously supplying power by the excitation control power source to three phases of stator switch components that are adjacent to phase M; only when Δtstator is zero, simultaneously supplying power by the excitation control power source of two phases of the stator switch component that are adjacent to phase M; sending position signals of stator and the rotor by the position sensors to the excitation control power source; controlling, by the excitation control power source, start and end moment of supply power to each phase line of the stator; and controlling running status of the motor.