Research on a Variable-Leakage-Flux Permanent Magnet Motor Control System Based on an Adaptive Tracking Estimator

Due to the characteristics of inductance parameter mismatch and back electromotive force harmonics caused by novel leakage flux branches other non-ideal factors for variable-leakage-flux permanent magnet (VLF-PM) motor, its control system suffers from a deteriorated performance rotor position estimation. To overcome problems mentioned above, an adaptive tracking estimator is proposed in this paper VLF-PM motor system. First, method simplifies mathematical model reduces effect variations according active concept. Then, robust gradient descent algorithms are utilized maintain robustness eliminate specific order owing branches. Meanwhile, accuracy stability enhanced. Furthermore, compensation based on current strategy compensate error factors. Finally, feasibility estimated verified.