Abstract
This paper proposes a current trajectory control strategy considering cross coupling and magnetic saturation effect under voltage and current constraint. It introduces geometric positions of torque and voltage increment in dq axis framework to determine the differentials between target values and results of the previous iteration, and then converts the torque and current differentials into current modification vector toward the optimal destination. It validated the proposed control strategy is insensitive to parameters variation and has well dynamic performance, it also can realize the seamless switch between constant torque control to flux-weakening control smoothly.
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