Flux-Weakening Control of Synchronous Reluctance Motors

In this paper, we will firstly introduce the generic flux-weakening control scheme and overview several commonly used flux-weakening strategies for the synchronous reluctance machine. Pros and cons for each method will be addressed. To assure torque control quality during flux weakening operation, a complex vector based current regulation technique is proposed and its command tracking and disturbance rejection performance are evaluated. Finally, overmodulation methods are summarized to maximize the bus voltage utilization for flux weakening.