Current Time Optimal Controller for PMSM based on Current Trajectory Planning

Lixiang Sun; Haifeng Wei; Hanpei Wei; Jia Cui

doi:10.6919/ICJE.202507_11(7).0018

Authors

Lixiang Sun
Haifeng Wei
Hanpei Wei
Jia Cui

DOI:

https://doi.org/10.6919/ICJE.202507_11(7).0018

Keywords:

Current Time Optimal Control Method; Current Transient Transition Trajectory; Voltage Saturation Region; PI.

Abstract

The current time optimal control method is used to plan the voltage command to achieve the shortest current tracking time. By analyzing the time optimal current trajectory, an improved current time optimal control method is proposed. The current transient transition trajectory is optimized by replanning the current command in voltage saturation region. The improved control method not only simplifies the calculation of the algorithm, but also realizes the fast transient-current characteristics in voltage saturation region without affecting the current steady state performance. The experimental results verify the feasibility of the proposed method. Compared with the conventional proportional-integral (PI) current controller, the new current control method maintains the system stability of the motor at high speed and achieves about 27% improvement in current transient response performance.

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