串並聯切換式電容合併耦合電感之升壓型直流-交流逆轉換器的設計與實作

Design and Implementation of Serial-Parallel-Switched-Capacitor Coupled-Inductor Boost DC-AC Inverter

李政彬(ZHENG-BIN LI)

指導教授 ： 張原豪

朝陽科技大學/資訊學院/資訊工程系/碩士(2017年)

摘要

本文提出以串並聯切換式電容合併耦合電感(SPSCCI)之升壓型直流-交流逆轉換器的設計與實作，並結合相位產生器與正弦脈衝寬度調變(sinusoidal pulse-width-modulation, SPWM)控制器，以進行高功率升壓轉換及調節，電力電路由二部份所組成(i)串並聯切換式電容合併耦合電感升壓器部分藉由四個電容與五個開關所組成，並由相位產生器控制開關，該電路穩態時電壓增益可以獲得[4(n+1)+(1+nD)/(1-D)] (ii)半橋式直流轉換器藉由二個開關及二個電容所組成，並由正弦脈衝寬度調變控制器控制開關實現正弦波輸出，所以該電路穩態時電壓範圍:+0.5[4(n+1)+(1+nD)/(1-D)]VS~ -0.5[4(n+1)+(1+nD)/(1-D)]VS 的直流-交流轉換器，其中D是耦合電感充電的工作周期，n是耦合電感的匝數比。當D=0.5、n=4時，最大輸出電壓可以到達電壓源V_S的26倍壓。此外，SPWM使用於閉迴路之中，進而增加該電路調節能力，以進行不同輸出電壓/負載(輸出電壓之峰值或頻率/負載之大小變化)之實現能力。最後，本文所提出的SPSCCI之升壓型逆轉換器是使用SPICE來模擬該電路之工作，所有的靜態與動態之模擬與數據量測結果來顯示逆轉換器的輸出，最後亦實作出電路，以證實本文所提出轉換器之可行性。

關鍵字

串並聯切換式電容耦合電感 ； 升壓式直流-交流逆轉換器 ； 正弦脈頻調變

並列摘要

A closed-loop scheme of serial-parallel-switched-capacitor coupled-inductor boost DC-AC inverter is proposed by combining a phase generator and sinusoidal pulse-width-modulation (SPWM) controller for the step-up inversion and regulation. The power part is composed of two cascaded sub-circuits, including (i) a SPSCCI booster with 4 pumping capacitors, and 5 switches controlled by phase generator, it raises the the voltage up to [4(n+1)+(1+nD)/(1-D)] and (ii) a Half-bridge DC-link inverter with 2 capacitors, and 2 switches controlled by SPWM, so as to obtain a steady-state voltage range of sinusoidal output: +0.5[4(n+1)+(1+nD)/(1-D)]VS~ -0.5[4(n+1)+(1+nD)/(1-D)]VS for a DC-AC conversion, where D is the duty cycle of charging the inductor, and n is the turn ratio of coupled-inductor. The maximum output voltage can reach 26 times voltage of source VS while D=0.5, n=4. Here, the SPWM is employed to enhance regulation capability for the different output amplitude and frequency, as well as robustness to source/loading variation. Finally, the SPSCCI inverter is designed and simulated by SPICE for some cases: steady-state and dynamic responses. All results are illustrated to show the efficacy of the proposed scheme.

並列關鍵字

serial-parallel-switched-capacitor coupled-inductor (SPSCCI) ； boost DC-AC inverter ； sinusoidal pulse-width-modulation (SPWM)

參考文獻

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