Weighting-Factorless PTC Strategy Based on Voltage Vector Angle

The predictive torque control strategy is a very commonly used model predictive control strategy. At present, the research prospects of PTC in motor control are broad, but there are still certain limitations in the industrial application of PTC. In traditional prediction torque control, due to the inconsistent units of electromagnetic torque and stator magnetic flux, weight factors need to be introduced to balance the control effects of the two. However, due to the cumbersome and time-consuming process of determining weight factors, it is not conducive to industrial promotion. In order to solve the problem of weight factors, this paper studies a new torque prediction control strategy based on stator flux vector angle that can avoid weight factors on the basis of traditional torque prediction control. The overall process of the new strategy is to first derive the relationship between the angle between the stator voltage vector and the stator magnetic flux vector and the electromagnetic torque and stator magnetic flux based on the mathematical model of the permanent magnet synchronous motor, establish a corresponding prediction model, and then determine the cost function through the new prediction model to eliminate weight coefficients. Finally, the effectiveness of the proposed weighting-factorless PTC strategy is verified through actual experiments.