无位置传感器内置式永磁同步电机起动控制策略研究

he rotor initial position detection for position sensorless interior permanent magnet synchronous motor (IPMSM) control strategy at standstill based on the hybrid signal injection was presented. The high-frequency (HF) mathematical model of IPMSM was built, and the HF fluctuating voltage signal injection method was adopted to estimate the rotor magnetic pole position. Namely that a pulsating carrier-voltage vector was injected on the direct-axis in the estimated rotating reference frame, then, the excited HF current vector in the measurement axis which lags 45 degrees behind the estimated rotating reference frame was used to extract the magnetic pole position information. On the basis of saturation and saliency principle, the pulse voltage vector injection method was adopted to identify the magnet polarity. Two pulse voltage vectors in the estimated magnetic pole position direction and the opposite direction were applied in the stator windings, and the magnet polarity could be identified by comparing the amplitude of the two excited currents.