本文提出一新型單相多階層換流器之電路架構，以兩個二極體與六個功率開關之組合來實現五階層輸出之架構，本電路架構使用較少的功率開關及二極體之元件數目來達到多階層輸出之目的，進而獲得低諧波失真之輸出與降低成本之開銷並擁有高功率密度之特點及縮小電路整體體積之大小，於章節中將深入探討與剖析控制法則及模式分析，而本文採用數位訊號處理器（TMS320LF2407A）為控制之核心並提出其延伸電路之架構，最後，實際完成一組1 kW數位控制之新型單相多階層換流器雛型，以實測之結果證明本文所提理論之正確性及電路實作之可行性。

In this thesis, a novel single-phase multi-level inverter topology is proposed. By using four additional power components, the proposed topology which is composed of six power switches and two diodes can achieve multi-level output. The new topology produces a significant reduction in the number of power switching devices and diode components to implement a multi-level output. In this way, the low harmonic distortion is achieved and the total cost of the circuit can be reduced. With less components, higher power density and small volume of circuit can be realized. The detail of mode analysis and the control method are introduced. The control scheme is presented by DSP（Digital Signal Processor）and the extended topology is proposed. Finally, a 1 kW novel single-phase multi-level inverter is implemented to verify the theoretical analysis and the performance.

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