Dynamic performance analysis of high frequency signal injection based sensorless methods for IPM synchronous motors

This paper focuses on three commonly used high frequency signal injection methods including pulsating square wave injection, rotating sinusoidal injection and pulsating sinusoidal injection which are used in IPMSM sensorless drive. To assess the dynamic performance of the HF injection methods, it seems that further analysis is needed. Some effective motor parameters such as pole number, saliency ratio and saturation effect on sensorless performance are evaluated. Moreover, some drive circuit parameters including current measurement noise and time delay effect due to demodulation process and load disturbance effect are also evaluated. In this work, MTPA strategy has been used to achieve the maximum torque per ampere. Finally, effect of these parameters on sensorless performance of IPMSM drive is evaluated by MATLAB software.