A New Position Sensorless Control Technology for Switched Reluctance Motor

A new rotor position sensorless method for switched reluctance motor drive system (SRD) is described in this paper. Rotor position can be considered as a function of phase current and the variation rate of it. Using the phase current obtained by sensors and the current variation the rotor position can be estimated accurately and quickly. A control strategy of SRD without position sensor is researched in detail here. The principle is introduced and a controller based on DSP is designed. Experimental results on the sample 12/8 SRD without sensor are presented to verify the proposed method.