Sensorless Synchronous Reluctance Motor Drives: A Full-Speed Scheme using Finite-Control-Set MPC in a Projection Vector Framework

The paper presents a general framework valid for high frequency excitation based position observer for low speed sensorless control of synchronous reluctance machines. A finite control set model predictive control technique is proposed accordingly, exploiting the switching current ripple for position estimation. Position error due to cross-saturation is inherently accounted for. The proposed scheme is integrated with Adaptive Projection vector for Position error estimation (APP) for high speeds region through a simple fusion structure for smooth transition. Performance of proposed technique is validated on a 1.1 kW synchronous reluctance motor test bench.