車載充電器在電動車發展過程扮演重要的角色，本論文利用三相雙向維也納轉換器作為其交流-直流電能轉換的主要架構。當車載充電器由電網對電池充電時，利用平均電流控制法實現功率因數校正並穩定匯流排電壓;當車載電池輸出電能至電網時，利用時域控制法實現換流器電網追隨控制策略，以調節饋入電網之電能。本文首先分析與探討三相雙向維也納轉換器工作原理、穩態特性與雙向控制方法，並使用寬能間隙元件－碳化矽開關以提高系統效率及功率密度。最後，實作電網電壓220 V、匯流排電壓 800 V、額定輸出功率 10 kW、切換頻率40 kHz 之雙向維也納轉換器。實驗結果顯示於交流-直流模式，最高效率在輸出功率8 kW時達98.4%，電網電流總諧波失真率最低可達3.94%，功率因數最高可達0.998；在直流-交流模式，其最高效率在輸出功率8 kW時達98.3%，電網電流總諧波失真率最低可達4.84%。

On-board chargers play a crucial role in the development of electric vehicles (EVs). In this thesis, a 3-φ bidirectional Vienna converter (BVC) for AC-DC power transfer is discussed. When grid provides power to EV, the average current control is used to achieve power factor correction and bus voltage regulation; When EV provides energy to grid, time domain sinusoidal PWM is adopted to regulate the energy fed into the grid. The operating principles, the steady-state characteristics, and bidirectional control methods of the 3-φ BVC are discussed firstly. In addition, silicon carbide power devices are implemented to enhance the efficiency and power density of the system. Finally, a 3-φ BVC is implemented with grid voltage of 220 V, bus voltage of 800 V, rated power of 10 kW, and switching frequency of 40 kHz. The experimental results show that in AC-DC mode, BVC can achieve the highest efficiency of 98.4% at Pbus=8 kW. The highest power factor is 0.998 with total harmonic distortion ratio of AC current (THDi) of 3.94%. In DC-AC mode, BVC reaches the highest efficiency of 98.3% at Pac=8 kW and achieves the lowest THDi of 4.84% under Pac=10 kW.

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