Switched reluctance motor (SRM) has double saliency structure and operates under the saturated condition to achieve high energy conversion ratio. Therefore, the magnetic characteristics of switched reluctance motor is highly non-linear that the actual...
Switched reluctance motor (SRM) has double saliency structure and operates under the saturated condition to achieve high energy conversion ratio. Therefore, the magnetic characteristics of switched reluctance motor is highly non-linear that the actual inductance profile can not be simply obtained by the inductance measurement instrument. As the control performance of SRM drive is highly dependent on a priori knowledge of magnetic characteristics, the accurate measurement is important. This paper presents the incremental inductance measurement method through closed loop current control. The rate of change of the phase current is captured by additional sampling instant. The effects of phase resistance variation, core loss, and power device voltage drop are considered to minimize the measurement error. The measurement results are verified with LCR meter and torque transducer measurement.