本文探討週期性電流控制器應用在具有容錯功能的永磁同步電動機驅動系統性能改善的研究。文中探討永磁同步電動機驅動系統，當變頻器有一個功率元件開路或短路，或者轉軸角度編碼器信號異常時的容錯功能，包括故障偵測、故障診斷、故障隔離及故障控制，以提升永磁同步電動機驅動系統的可靠度，使得驅動系統在故障時能進行容錯功能，並持續的運轉。
為了改善驅動系統的電流諧波量，文中使用週期性電流控制器，包括傳統週期性及選擇諧波週期性兩種，來降低電流的諧波量，以改善驅動系統的性能，與比例-積分控制器比較，本文所提方法可降低驅動系統的總諧波電流。
文中使用德州儀器公司所生產的數位信號處理器TMS320F2808作為控制核心，以實現變頻器和轉軸角度編碼器故障的容錯功能，並執行週期性電流控制。實驗結果與理論分析頗為吻合，說明本文所提方法的正確性及可行性。

This thesis investigates periodic current controller design for a fault-tolerant permanent magnet synchronous motor drive system to improve its performance. When a power switch in the inverter is open- or short-circuited, or an encoder malfunction, the fault-tolerant function, including fault detection, fault diagnosis, fault isolation and fault control, is proposed to improve the reliability of the permanent magnet synchronous motor drive system. As a result, the system instantaneously executes fault-tolerant function to maintain its normal operation.
To improve the current harmonics, two periodic current controllers including a classic periodic current controller and a select harmonics periodic current controller, are proposed. The proposed two controllers can reduce the total current harmonics of the drive system when compared to a PI controller.
A digital signal processor, TMS320F2808, made by Texas Instruments, is used as a control center to execute the inverter fault, encoder fault, and periodic current control algorithms. Experimental results match the theoretical analysis to validate the correctness and feasibility of the proposed method.

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