Maximum Torque Per Ampere Control Based on Feedforward Search Method for IPMSM
Aiming at the problem of slow search speed in traditional search method Maximum Torque per Ampere(MTPA),an improved search method MTPA control strategy based on feedforward compensation was proposed.In order to improve the dynamic performance of the system,this strategy replaced the distribu-tion formula of the direct axis current with a piecewise function,and obtained a universal formula for calcu-lating the feedforward of the direct axis current.On the basis of feedforward,perform extreme value search method to obtain the optimal direct axis current,and find the optimal direct axis current command.Then,used historical working data to correct the segmented function to improve feedforward accuracy.Finally,the search process of the feedforward search method was analyzed,and a search threshold was set to avoid peri-odic oscillations of the search method in steady state.Simulation and experimental results verified the effec-tiveness of this strategy.
万方数据
维普
