本文旨在研究六相永磁式同步電動機驅動系統之故障後控制策略，針對六相永磁式同步電動機兩組三相繞組中任一相繞組發生斷線故障後，藉由電動機繞組之中性點接一組開關，使電動機之各相線圈與中性點構成迴路，以兩相繞組來繼續運轉，以增加運轉可靠度。並修正未故障之兩相電流使其相位角相差 度，減少轉矩抖動。六相永磁式同步電動機之故障後控制策略與轉速及電流閉迴路控制系統以軟體Matlab/simulink模擬。本文系統以數位信號處理器TMS320F2808為控制核心，其六相永磁同步電動機之轉速電流閉迴路控制，以及故障後之控制策略皆由軟體程式完成。本文已完成250W六相永磁同步電動機之正常及故障後運轉的實體製作，並藉由實測結果驗證控制策略之可行性。

This thesis focuses on the post-fault control strategy for six-phase permanent-magnet synchronous motor (PMSM) drives. When any phase winding of the six-phase PMSM breaks down, connecting the neutral-point of the faulted three-phase winding to the controlling switch makes each of the other two unbroken windings form a current loop to retain continuous running and increase the reliability of the system. The normal two winding currents can be corrected to result in a 60-degree phase-current difference, thereby reducing torque pulsation. In this thesis, Matlab/Simulink is used to simulate the proposed six-phase PMSM system including current closed-loop control, speed closed-loop control and post-fault control strategy. The digital signal processor TMS320F2808 is adopted as the control core. Fault tolerance control strategy, closed-loop controls of speed and current are accomplished by software. A prototype of 250W six-phase inverter for PMSM drive under the normal and post-fault operation of the system is built. Reliability and performance of the system are verified experimentally.

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