Abstract
In this paper, we address the torque control problem of a permanent magnet synchronous motor (PMSM) under input voltage limitation. First, a plant model of a PMSM is derived as a linear parameter varying system in which the rotor speed is included as the varying parameter. Second, we show that setpoint tracking control is achievable under the time variation of the rotor speed. Then we show a method of constructing a control law that achieves convergence of the motor torque to a step reference signal under input voltage limitation and time variation of the rotor speed. The proposed control law consists of a gain‐scheduled control law and a servo compensator. In the proposed control method, the scheduling parameter and the controller state are optimally updated so that the transient response is improved. The effectiveness of the method is shown by a numerical example. © 2017 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.
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