METHOD FOR CONTROLLING SWITCHED RELUCTANCE GENERATOR WITHOUT POSITION SENSOR

摘要

A method for controlling a switched reluctance generator without position sensor, for use in a switched reluctance generator employing a dual-switches-per-phase power converter. In an excitation stage, both an upper transistor (S1) and a lower transistor (S2) of a main switch of a phase of the power converter are turned on, and the current (i) of the phase is measured; when the current of the phase increases to a predetermined threshold, either the upper transistor or the lower transistor of the main switch is shut off, the phase enters a zero-voltage natural freewheeling state, and the current of the phase starts to decrease; when the current of the phase decreases to a valley value, the position of a rotor is the maximum phase inductance finishing-end position (b) of the phase and serves as a shutoff position (?2) of the main switch of the phase, and the upper transistor and the lower transistor of the main switch are shut off. The method obviates the need for additional hardware to be attached externally, obviates the need for storing motor flux linkage data, has great real-time properties, great dynamic response performance, and great stability, and provides improved practicability and versatility.