A novel parameter identification of IM based on inverter by reducing dead-time effect

In order to improve the parameter precision of induction motor in identification at standstill, a novel method by adaptive compensation of dead-time effect in inverter control is proposed. Proportional resonant controller, phase locked loop and the feature of dead-time effect are implemented to adaptively compensate the dead-time effect of current and to relieve the voltage wave distortion. The nonlinear influence of dead-time effect in direct current measurement is also relieved. The experimental results show the proposed method can reduce the harmonics of current and voltage 8.92% and 7.65% separately. The amplitude and phase of voltage are also compensated. The fluctuation of voltage amplitude is less than uncompensated one. It is validated that the proposed method can improve the measurement precision of resistance and inductance.