Modeling and Implementation of Active-Harmonic-Elimination Switched-Capacitor Boost DC-AC Inverter

2019 IEEE International Conference on Industrial Technology (ICIT) Pub Date : 2019-02-01 DOI:10.1109/ICIT.2019.8755101

Yuen-Haw Chang, Shin-Cheng Chen

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Abstract

The modeling and implementation of a 9-level switched-capacitor (SC) boost DC-AC inverter is presented by combining an active-harmonic-elimination (AHE) controller for realizing a staircase inversion and closed-loop regulation. In this 9-level SC inverter, there are three pumping capacitors and bidirectional switches used between supply VS and output Vout in order to obtain the maximum gain of 4 as well as the inverted gain of 4 at most. For achieving a staircase AC output, these bidirectional switches are driven by the clock generator so as to boost/invert Vout into 1x, 2x, 3x, or 4x voltage of VS. Here, the AHE technique is employed not only to manipulate the time durations of the output levels of 1x, 2x, 3x, 4x for the elimination of the 3rd, 5th, 7th harmonics, but also to enhance the regulation capability for the different desired output. Further, the relevant modeling and some theoretical analysis are included. The performance of this inverter is simulated and verified experimentally on the implemented prototype circuit to show the efficacy of this scheme.

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有源消谐波开关电容升压直流-交流逆变器的建模与实现

结合有源消谐波(AHE)控制器实现阶梯逆变和闭环调节，提出了一种9电平开关电容(SC)升压DC-AC逆变器的建模和实现方法。在这个9电平SC逆变器中，在电源VS和输出Vout之间使用了3个泵浦电容和双向开关，以获得最大增益4，最多反向增益4。为了实现阶梯式交流输出，这些双向开关由时钟发生器驱动，从而将Vout升压/逆变为vs的1x、2x、3x或4x电压，在这里，AHE技术不仅用于操纵1x、2x、3x、4x输出电平的时间持续时间，以消除第3、5、7次谐波，而且还增强了对不同期望输出的调节能力。在此基础上，进行了相关的建模和理论分析。在实现的原型电路上对该逆变器的性能进行了仿真和实验验证，证明了该方案的有效性。

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2019 IEEE International Conference on Industrial Technology (ICIT)

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