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| Zero-Voltage and Zero-Current Resonant CLCL DC-AC Converter |
| Wang Yifeng1, Xu Dianguo2, Wang Yijie2, Wang Binze2, Zhang Xiangjun2 |
| 1. Tian Jin University Tian Jin 300110 China 2. Harbin Institute of Technology Harbin 150001 China |
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Abstract A CLCL resonant DC-AC converter was investigated in this paper, which is used for high-power high-pressure-sodium lamps(HPS lamps). Zero-voltage and zero-current switching(ZVZCS) and sine-waveform were achieved by working on the resonant point. The working principle for the new circuit was presented, based on the soft switching conditions for the converter switching. An optimization design method was investigated in this paper, which ensures the minimum voltage stress of the resonant components in ZVZCS condition. The theoretical analysis and the simulation were presented based on the newly designed circuit. The analysis and simulation results show that all the switching were working on ZVZCS condition. At the same time, the output current had a sine waveform, which efficiently reduced the crest factor of the current and prolonged the life of the lamp. A DC-AC resonant converter was designed with 400V input, 100V/10A output, and 260kHz switching frequency. The experimental results verified the design method of the quality factor is rational, and the full load efficiency of the converter can achieve 99.1%.
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Received: 08 March 2012
Published: 25 March 2014
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2013, Vol. 28 
