Vector Control of High Speed PMSM Based on Single-Pole Magnetic Encoder

Common position sensors cannot achieve detection of the rotor position with high precision at high speed,which badly hinders the development of servo control for high-speed motors.In this paper a novel single-pole magnetic encoder has been proposed for precision feedback of rotor position of high speed motors,and a compensation algorithm for feedback lag has been put forward to ensure the control precision.Control experiment has been carried out with a permanent-magnet synchronous motor(PMSM)with 600 W,4 pairs of poles and the rated rotation speed of 20 000 r/min,and confirms the validity of vector control of high speed motor by using the position sensor proposed.