Rotor position measurement for high-speed permanent magnet synchronous motors based on fuzzy PI MRAS

On account of the features of the high speed permanent magnet synchronous motor which has a high speed and a wide speed range, this paper proposes a kind of rotor position observer which is model reference adaptive system (MRAS) based on fuzzy PI self-adaptive regulator. This method uses the fuzzy controller regulate the proportion and the integration ratio of the PI regulator, so that the PI regulator has a perfect performance in a wide speed range of the HSPMSM. This method improves the precision of the rotor's position which is observed by MRAS. In the end, simulations and experiments for a 4 kW HSPMSM with an air blower are carried out for this method. It realizes the position estimation. The error is analyzed and a compensation method is proposed. The results demonstrate that the Fuzzy PI MRAS Observer can effectively estimate the rotor position of the HSPMSM in a wide speed range. © 2014 Chin. Soc. for Elec. Eng.