Robustness analysis of the estimation of rotor position in SRM drive

The sensorless scheme for switched reluctance motor (SRM) drives must have robustness and reliability because the noise and error are sensitive. These elements make electrically noisy environments due to the proximity of high current power circuits with small signal electronic circuits when used with SRM drives. In addition, due to the leakage inductance and finite coupling capacitance, these can cause the noise on current at any low voltage and voltage measurement circuits. The position estimate error occurs because the current and voltage including the noise are used as the inputs of a sensorless algorithm. In this paper, the high robustness and resistance of input noise are described. The fuzzy logic based rotor estimation algorithm and the observer model are used to reduce the tolerance of input data.