Voltage limiter calculation method for fast torque response of IPMSM in overmodulation range

In this paper, a voltage limiter calculation method for the fast torque response of an interior permanent magnet synchronous motor (IPMSM) when an inverter operates in the overmodulation range is considered. The relation between torque response of an IPMSM and voltage phase angle in the overmodulation range is analyzed, and based on this relation, the optimal voltage limiter calculation method that can be realized by real time calculation is proposed. By using the proposed method, torque response of an IPMSM can be improved as fast as twice the conventional methods. The effectiveness of the proposed method is confirmed by simulation and experimental results.