2 results about "Switched reluctance motor" patented technology

The invention provides a switched reluctance motor torque control method and a modular power converter, the input of a rotating speed ring is a set reference rotating speed and a measured actual rotating speed, a rotating speed error is obtained, the rotating speed error is used as the input, and a total reference torque is obtained through PI control; the input of the torque ring is the total reference torque, the actual torque of each phase, the turn-on angle and the turn-off angle, and distributing the total reference torque to each phase by using a torque distribution function to obtain a phase reference torque; according to the numerical value relation between the phase reference torque and the actual torque of each phase, a pulse width modulation control signal is obtained through torque hysteresis, and the pulse width modulation control signal is applied to a corresponding switch tube in the modular power converter to complete control. On-line self-adjustment is carried out on an overlapping angle in a torque distribution function at each sampling moment, torque hysteresis is based on a pulse width modulation algorithm, pulse width modulation signals with different duty ratios and polarities are generated within a hysteresis limit, and free response is avoided.

The invention discloses a three-phase 18/16-pole bearingless switched reluctance motor. According to the invention, torque windings on torque teeth are used for generating output torque, and suspension windings on the suspension teeth are used for generating radial suspension force; due to the fact that the pole arc angle of the suspension teeth is equal to a rotor periodic angle, the inductance of the suspension windings is constant, and the motion electromotive force of the suspension windings is zero, so the suspension winding does not generate torque, and then natural decoupling of the torque and the suspension force can be achieved structurally; a traditional switched reluctance motor driving mode is adopted for rotation control, and suspension control is similar to a traditional electromagnetic bearing control mode, so control is simple, and good suspension performance is obtained; only one coil is wound on each tooth, so a structure is simple, machining and assembling are convenient, and a multi-rotor-tooth-number structure facilitates reduction of torque pulsation and increase of output power; moreover, torque and suspension magnetic circuits are both of a short magnetic circuit structure, so iron core loss can be reduced; and the magnetic flux direction of a stator yoke part does not change when the motor operates, so the stator iron core loss can be further reduced.