An Improvement on Position Estimation and Start up Operation for Switched Reluctance Motor Drives

In this paper a simple method to estimate the rotor position of the switched reluctance motor at the stand still condition is proposed. The proposed method can be implemented by the simple microcontroller based system, and it is not affected by the operating voltage and a sampling time of the system. With the more accurate value of the estimated rotor position, the motor can start up from the stand still condition although under the heavy and dynamic load such as the electric vehicle drive system. The proposed method is implemented with the 6 stator pole and 4 rotor pole, 1.5 kW switched reluctance motor which has the suitable torque speed characteristic for the electric vehicle application but have the considerable problem of the torque dip and start up.