Space-vector based, constant frequency, dead beat stator flux control of AC machines

Abstract

This paper presents a simple inverter switching strategy that achieves dead-beat control of stator flux. In the proposed predictive control scheme, the switching information is obtained directly from the error in flux. This approach is simpler than the methods of flux control in which a reference voltage vector is generated to obtain the inverter duty cycle. The distinct advantages of this scheme lie in achieving a constant switching frequency operation and excellent performance at low operating frequencies. Detailed theoretical concepts are developed in this paper and simulation and experimental results are provided.