Switched-capacitor inverter with high power density and enhanced regulation capability

被引：98

作者：

Mak, OC ^{[1
]}

Ioinovici, A

机构：

[1] Hong Kong Polytech Univ, Dept Elect Engn, Hung Hom, Hong Kong

[2] Inst Educ Technol, IL-58102 Holon, Israel

来源：

IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-FUNDAMENTAL THEORY AND APPLICATIONS | 1998年 / 45卷 / 04期

关键词：

DC-AC switching-mode inverter; duty-cycle regulation; switched-capacitor circuit;

D O I：

10.1109/81.669056

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A dc-ac inverter containing no inductors or transformers is presented. The role of the magnetic devices is played by a switched-capacitor (SC) circuit, formed by two subcircuits. Each SC-subcircuit contains 15 basic cells, each one formed by one capacitor, two MOSFET's and two diodes. The sinusoidal output waveform is realized in a staircase, formed by 64 steps, To achieve each step, the inverter operates like a step-up de-de converter: by using a certain number of SC-cells, the input voltage is boosted to the voltage required by the step in consideration. Each step is implemented in a large number of switching cycles. In each cycle, the inverter goes through four phases; according to a designed switching sequence, some of the capacitors of the SC-cells involved in the respective step are in a charging process from line, while the others are in a discharging process to the load. The phases 2 and 4 have a regulation role only. A duty-cycle control is used. A Fourier analysis evidences the clean ac output waveform. The inverter exhibits low weight, high power density, and enhanced regulation for large changes in line and load.

引用

页码：336 / 347

页数：12

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