PMSM制御性能改善のための繰返し制御を用いた高調波電流抑制

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Generally, PMSM is driven by the vector control based on the current control. However, in spite of using the vector control, there are harmonic components in the current control loop of vector control system due to several causes. Authors have proposed the suppression control method of harmonic current in the vector control system for PMSM using the repetitive control with Fourier Transform. The proposed control method, however, was carried out individually for each harmonic current component with Fourier Transform and phase adjustment of compensational signals to stabilize the system, so that the process of learning compensation signal was complicated and required much calculation time on the DSP. In this paper, we propose a new control method suppressing all harmonic current components simultaneously without Fourier Transform and phase adjustment of compensational signal. Although, in theoretical, the repetitive control is useful on the steady state, our proposed method is applied to a motor drive system which has a transient state frequently. Therefore, considering the stability on the transient state of the motor and faster harmonics convergence after motor speed changed, it is desirable that the stability margin of the control system keeps larger and relearning speed of compensational signal is faster. In this paper, we additionally propose a method improving the stability margin of the control system and the convergence speed of harmonics. By the stability analysis of experimental results, we confirm the new proposed control method.
社団法人電気学会の論文
2004-12-01

PMSM制御性能改善のための繰返し制御を用いた高調波電流抑制

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