Technology for Precise Position Control Strategy of PMSM

Permanent magnet synchronous motor has replaced the dc motor in many occasions and become the mainstream in the servo system. But the dynamic model of the permanent magnet synchronous motor is a strongly coupled variable system. Permanent magnet flux in the machine under different operating conditions are considered constant, accuracy of the model was decreased. In this paper, current deviation of decoupling and current feedback decoupling were compared for the current loop current coupling problem, a more accurate model was established. On the basis of the current inner loop optimization, position feed-forward controller was adopted to optimize the system of position loop.