Synchronous SVM-Based Model Predictive Flux Control of Induction Motor Drives With Fast Phase Synchronization

Synchronous space vector modulation (SSVM) has been widely applied in motor drives operated with a low switching frequency. For SSVM based closed-loop control, the phase angle of voltage command updated at each control step should equal to the predefined sampling positions. The prior arts usually adopt proportional integral controller with a sampling period compensation to achieve current regulation and phase synchronization, which show slow dynamic responses. This article proposes an SSVM-based model predictive flux control (MPFC) for induction motor drives under low switching frequency. Unlike the prior methods, which implement phase synchronization and current regulation as two cascaded control loops, the proposed MPFC achieves torque tracking control and phase synchronization simultaneously. As a result, much smaller phase error and faster synchronization speed are obtained during transient processes when compared with the prior method. Simulation and experimental tests, along with a video demonstration, justify the effectiveness of the proposed method.