本論文旨在研製具正弦波寬調變與空間向量波寬調變之三相變流器系統，特點在於利用數位信號處理器為控制核心，建構具獨立供電模式和市電併聯模式之三相變流器系統，且獨立供電和市電併聯供電模式下會選用適當之調變訊號來提升整體特性。所提變流器系統工作於獨立供電模式時，基於轉換效率和電壓利用率之考量，選用空間向量調變方式為系統調變訊號，並利用電壓回授控制機制達到輸出不受負載變動和輸入電壓變動影響；而市電併聯供電模式時，基於動態響應和相位可控性，選用正弦波寬調變方式做為系統調變訊號並利用電流控制以及零點偵測同步電路達成與市電同步。此外也加入了保護機制，用以避免前端輸入電能超過系統所能操作之範圍導致電路燒毀。最後，以數位控制方式來實現三相變流器系統並完成輸出獨立供電1500瓦及市電併聯供電1000瓦來驗證。

In this thesis, the three-phase inverter system with SVPWM and SPWM is proposed. Features of propose is designed and implemented with stand along mode and grid-connected mode by digital signal processor (TMS320LF2407A) and auxiliary circuits. In order to enhance voltage utilization ratio and efficiency which the space vector pulsewidth modulation (SVPWM) is utilized to drive the three-phase inverter system in stand alone mode. According to dynamic response and controllability of phase, sinusoidal pulsewidth modulation (SPWM) is chosen as the driver signal of the inverter in grid-connected mode. The control techniques of inverter are constant voltage control and constant current control with stand alone mode and grid-connected mode, respectively. Finally, the inverter system with digital control is realized and experimental results show that the system supplies 1500 W in stand alone mode and 1000 W in grid-connected mode.

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