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Field Weakening Operation Control Strategies of PMSM Based on Feedback Linearization

Engineering Research Center of Automotive Electronics Drive Control and System Integration, Ministry of Education. Harbin University of Science and Technology, Harbin 150080, China
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Energies 2019, 12(23), 4526; https://doi.org/10.3390/en12234526
Received: 22 October 2019 / Revised: 26 November 2019 / Accepted: 26 November 2019 / Published: 28 November 2019
Based on current research into the mathematical model of the permanent magnet synchronous motor (PMSM) and the feedback linearization theory, a control strategy established upon feedback linearization is proposed. The Lie differential operation is performed on the output variable to obtain the state feedback of the nonlinear system, and the dynamic characteristics of the original system are transformed into linear dynamic characteristics. A current controller based on the input–output feedback linearization algorithm is designed to realize the input–output linearization control of the PMSM. The current controller decouples the d–q axis current from the flux linkage information of the motor and outputs a control voltage. When the motor speed reaches above the base speed, the field-forward and straight-axis current components are newly distributed to achieve field weakening control, which can realize the smooth transition between the constant torque region and weak magnetic region. Simulation and experimental results show the feasibility and viability of the strategy. View Full-Text
Keywords: permanent magnet synchronous motor; field weakening control; feedback linearization; current lead angle permanent magnet synchronous motor; field weakening control; feedback linearization; current lead angle
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Zhou, K.; Ai, M.; Sun, D.; Jin, N.; Wu, X. Field Weakening Operation Control Strategies of PMSM Based on Feedback Linearization. Energies 2019, 12, 4526.

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