Direct MTPA Tracking Control of Sensorless IPMSM in Low-Speed Region

초록

This article proposes a position-sensorless maximum torque-per-ampere (MTPA) tracking control method for the low-speed region. Unlike the conventional MTPA tracking algorithms which count on the stator flux observation, the proposed algorithm performs the MTPA operation solely through the high frequency voltage injection. To achieve sensorless MTPA operation, the MTPA criterion is interpreted through dynamic inductance terms, which are estimated online through tilted high-frequency voltage vector injection. Since the proposed algorithm does not rely on fundamental output voltage information, it can be applied to very low-speed regions, including standstill. The practicality of the proposed method is verified through experimental tests conducted on a 150 kW-rated interior permanent-magnet synchronous motor (IPMSM).

키워드