| Summary: | 碩士 === 國立成功大學 === 工程科學系碩博士班 === 95 === This thesis presents a new adaptive fuzzy sliding-mode speed controller to control the permanent magnet synchronous motor (PMSM) based on the direct torque control (DTC) scheme. The DTC scheme allows a very quick and precise control of the flux and torque. However, the traditional DTC scheme can’t estimate flux linkage correctly at low speed. To improve the drawback of the conventional DTC scheme, this thesis proposed the space vector voltage PWM scheme, controlled by the torque controller and the flux controller, to eliminate the errors of torque and flux. By dint of it, the flux linkage can be estimated correctly. Besides, the traditional PI speed controller can’t provide perfect tracking performance of the torque in the external loop and the stability of the control system can’t be guaranteed. Thus, this thesis presents a new adaptive fuzzy sliding-mode controller to improve the tracking control. The proposed control scheme was implemented by a high-precision and reliability TMS320F2812 digital signal processor (DSP) for a PMSM speed control system.
The simulation and experiment results, compared the adaptive fuzzy sliding-mode control scheme with traditional PI control scheme, show that the performances of the proposed control scheme are better than those of the traditional PI control.
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