Signal processing of zero sequence voltage technique

This paper deals with the implementation of the zero sequence voltage (ZSV) technique [4,7], which was exploited to determine the rotor position of the surface permanent magnet synchronous motor (SMPMSM). The method is based on the zero sequence voltage measurement, performed between the neutral point of AC machines and the mid-point of the inverter DC bus. The air gap flux position and consequently the rotor position were obtained by adopting a position estimator with suitable filtering algorithm.