| Summary: | 碩士 === 國立中央大學 === 電機工程學系 === 104 === A novel maximum torque per ampere (MTPA) method based on power perturbation for a field-oriented control (FOC) interior permanent magnet synchronous motor (IPMSM) drive system is proposed in this study. Moreover, to enhance the robustness of the control system, a real-time design scheme for the integral-proportional (IP) controller using recursive least square (RLS) estimator with disturbance torque feedforward control is developed, and the disturbance torque is obtained from an improved disturbance torque observer with online parameters updated. The proposed MTPA method, which is parameter independent and can improve the motor operation at low-speed or approaching to zero speed, is designed based on the power perturbation resulted from the signal injection in the current angle. Furthermore, the influence of current and voltage harmonics to the MTPA control also can be eliminated effectively. On the other hand, utilizing the improved Elman neural network (ENN) for the purpose of good performance of control strategy under a cyclic fluctuating load is proposed in this study. Finally, some experimental results using a prototype IPMSM drive system based on a low price digital signal processor (DSP) are presented. From the experimental results, the proposed control approach can guarantee the speed loop control performance even under a cyclic fluctuating load.
|
|---|
