A detecting method of position angle at standstill and lower speedregion for salient-pole brushless DC motors

摘要

This paper presents a rotor position detecting method for asalient-pole brushless DC motor at a standstill and lower speedconditions respectively. The position angle estimation is based on themodel reference adaptive system in a rotational coordinate reference. Atstandstill and lower speed regions, the position detecting technique isbased on the function of the rotor position. By using the detectingtechniques, the motor can be controlled in a lower speed region withoutusing a position sensor. To confirm these proposed algorithms, theexperimental and simulated results are shown