Vector Sliding Mode Control of Sinusoidal-Field Synchronous Servo Drive

Abstract

Permanent magnet synchronous servo drive with sinusoidal field is examined. The proposed control method is the sliding mode control, implementing the speed control, the current vector control, limitations and field weakening. The necessary sliding errors are derived. Different evaluation criteria are investigated by simulation and a new one is proposed. The combined vector sliding mode control, where the intervention depends on the magnitude of the sliding errors, is better than the traditional vector bang-bang control. The robustness of the bang-bang control is retained, the switching number and the steady state chattering are decreased.