這是首次由此論文提出一基於使用Dickson切換式電容單元之新型切換式電容多階層逆變器，此方法能有效提升輸出電壓，並且具有適當之輸出電壓階層數，以減低開關應力，且具有低輸出總諧波失真。此新提出之解決方法有幾個主要優勢，包含：1) 在各種切換式電容多階層逆變器的優劣勢中取得權衡，於相同電容數量的使用下，相較於串-並式架構，本方法擁有較佳的升壓能力以及較高的輸出電壓階層數；相較於Fibonacci和Exponential架構，本方法所需的功率開關耐壓較低，2) 藉切換式電容單元裡電容每兩階段充電，可確保較小的電容電壓漣波及容值，3) 非脈動輸入電流，適用於太陽能電池應用，以及4) 藉輸出全橋開關操作在零電壓或零電流切換，即零切換損耗。不僅如此，此提出之電路架構具有電容電壓自我平衡能力，因此無需外加電壓平衡電路，且無需使用磁性元件，故具有小體積、高功率密度及高效率等優勢。在本論文裡，針對切換式電容容值、開關元件耐壓、調變方法、功率損耗及效率等進行深入的分析與計算，最終在模擬和實驗中驗證其可行性。在實作中，即是以太陽能板操作在最大功率點電壓為24 V的情況下，成功實現輸出電壓有效值110 Vrms、輸出頻率60 Hz，以及在輸出額定功率為100 W的情況下，此逆變器的效率為96.15 %以及輸出總諧波失真為6.77 %。

It is the first time this research proposes a switched-capacitor multilevel inverter (SCMLI) based on a Dickson switched-capacitor (SC) cell. By this proposed solution, the output voltage will be boosted and a moderate large number of voltage level can be achieved, thus reducing the switch voltage stress and the total harmonic distortion (THD). The advantages of this proposed solution include: 1) a trade-off between the advantages and disadvantages of the available series-parallel, Fibonacci and Exponential solutions, i.e. a moderate large number of levels and a relatively high boost factor with the same number of capacitors compared with series-parallel solution; a relatively low voltage stress compared with Fibonacci and Exponential solutions, 2) charge of capacitors in the SC cell every two stages, assuring in such a way a small capacitor voltage ripple and thus smaller capacitors, 3) non-pulsating input current as required for applications powered by solar cell, 4) switching of the large output H-bridge switches under zero-voltage switching (ZVS) or zero-current switching (ZCS), implying zero-switching losses for those MOSFETs. This proposed inverter also has advantages of small size, high power density, and high efficiency with voltage self-balancing ability and re-quiring no any magnetic devices, such as inductors or transformers. The calculations for capacitance, voltage stress, and power loss, as well as the modulation, are included. Analysis, simulation, and experimental verifica-tion for this proposed inverter are presented to illustrate proof of con-cept. Finally, a hardware prototype of this proposed inverter supplied by a 24 V – the MPPT voltage from a PV panel, providing a 110 Vrms and 60 Hz sinusoidal voltage is realized. The inverter has an efficiency of 96.15 % and a THD of 6.77 % at load of 100 W.

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