Improved maximum torque per ampere control for HS PMSM
                                                                    YUAN Qing qing, LI Long yin, YANG Na
           (School of Optical Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China)

Abstract: Aiming at the problem that the rotational inertia of the high speed permanent magnet synchronous motor is small, the stator inductance is small and it is easy to be disturbed by operating environment, the maximum torque current ratio control considering the influence of the motor inductance and other parameters was studied. An improved method of injecting a high frequency small signal into a current vector angle based on a sliding discrete Fourier extraction maximum torque to current operating point was proposed. Firstly, the output electromagnetic torque of the input high frequency small signal angle was extended by Taylor formula.Then signal processing was carried out based on the sliding Fourier method, and combined with conventional PI regulation, the current vector angle was obtained when improving the maximum torque current ratio control. Finally, the simulation results were verified by Matlab simulation software. The results indicate that the improved perturbation and maximum torque in the motor parameters, which has good anti disturbance performance, so as to improve the control performance and the efficiency of the system.

Key words: high speed permanent magnet synchronous motors (HSPMSM); maximum torque per ampere (MTPA); high frequency small signal; sliding discrete fourier transform (sDFT)