Wide-range Soft-switching High-efficiency High-frequency-link DC-AC Converter Based on Dual Auxiliary Network

被引：0
|
作者：
Guo S. [1 ]
Su J. [1 ]
Chen X. [2 ]
Zhong S. [3 ]
Yu X. [1 ]
机构：
[1] School of Electrical Engineering and Automation, Hefei University of Technology, Hefei, 230009, Anhui Province
[2] Queensland Micro-and Nanotechnology Centre, Griffith University, Brisbane, 4111, QLD
[3] School of Electrical Engineering, Southwest Jiaotong University, Chengdu, 610031, Sichuan Province
来源：
| 1600年 / Chinese Society for Electrical Engineering卷 / 37期
基金：
中国国家自然科学基金;
关键词：
Cycloconverer-type high frequency link DC-AC inverter; Dual auxiliary network; Soft-switching; Uni-polarity phase shifted modulation strategy; Zero voltage switching(ZVC);
D O I：
10.13334/j.0258-8013.pcsee.161790
中图分类号：
学科分类号：
摘要：
A wide-range soft-switching cycloconverter-type high-efficiency high-frequency-link inverter (CHFLI) based on dual auxiliary network (DAN) was proposed. The primary-side passive auxiliary network in DAN-CHFLI provides enough reactive current and extends soft-switching range, achieving zero voltage switching (ZVS) for primary-side full-bridge switches under different operating conditions from light load to full load. The secondary-side active auxiliary network (AAN) with power switches and clamping capacitor is utilized to assist commutation and eliminate the voltage spikes caused by the leakage inductor of high-frequency transformer. A novel phase shifted clamping strategy for the AAN was proposed. All switches of AAN are driven with nearly 50% fixed duty cycle square signals, thus making gate driving circuits for power switches easy to realize. Compared with primary-side full-bridge switches, the switches of AAN conduct with delay time but turn off synchronously. The delay time maintains ZVS turn-on of AAN switches. The modulation strategy, detail operation principles and soft switching characteristics of DAN-CHFLI were analyzed and derived. Finally, experimental results were presented to verify the analysis results. © 2017 Chin. Soc. for Elec. Eng.
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页码：5377 / 5388
页数：11
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