Real-Time Flux-weakening Control for an IPMSM Drive System Using a Predictive Controller

摘要

This paper proposes extended-range high-speed control for an IPMSM drive system. A simple real-time tuning flux-weakening control algorithm is proposed and implemented to control an IPMSM drive system in a wide variable speed range, from 3 r/min up to 2700 r/min. This flux-weakening control algorithm does not require any motor parameters and only needs simple mathematical computations. The proposed drive system adjusts the angle between the d-axis and q-axis current to reach flux-weakening control. In addition, a multiple sampling predictive controller is implemented to enhance the dynamic responses of the proposed drive system, which yields improved overall transient responses, superior load responses, and good tracking responses. A detailed analysis of the proposed drive system’s stability is discussed as well. A 32-bit digital signal processor, TMS-320F-28335, is used to execute the predictive controller and the flux-weakening control algorithm for the IPMSM drive system. Experimental results can validate the theoretical analysis.