单相高频链逆变器的解结耦单极性移相调制及其死区优化

doi:10.19595/j.cnki.1000-6753.tces.161796

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Abstract The topology of single-phase high-frequency link inverter (SPHFLI) is composed of high-frequency transformer, primary-side high-frequency inverter of the high-frequency transformer, output matrix converter/cycloconverter in the secondary side, and output filter. The high-frequency link inverter has the advantages of isolated power conversion and bidirectional flow of energy, as well as the difficulty of bidirectional switch commutation control. A De-Re-coupling uni-polarity phase-shifted modulation strategy for the topology of the SPHFLI was proposed in this paper. Without any auxiliary circuits and switch commutation overlap of the cycloconverter, this strategy can achieve natural commutation for all power switches in the cycloconverter with zero voltage switching (ZVS) as well as free-wheeling in the inductance of filter with no high voltage press impact. Then, a method of optimizing dead zone setting is also studied in this paper. Accordingly, the neighborhood distortion of zero crossing point of output voltage can be effectively improved under the control of the uni-polarity phase-shifted modulation strategy. The compensation for low utilization of the input voltage and the large harmonic content of the output voltage caused by the dead time effect can also be gained. The feasibility and effectiveness of the proposed strategy and the optimized dead-time setting method are verified through theoretical analysis, simulations and experiments.

Key words： High-frequency link inverter de-re-coupling uni-polarity phase-shifted modulation dead-time effect zero voltage switching (ZVS)

Received: 15 November 2016 Published: 28 March 2018

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TM464

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	Yan Zhaoyang
	Zhang Zhe
	Li Jianxia
	Xu Shuchao
	Yang Lijun

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Yan Zhaoyang,Zhang Zhe,Li Jianxia等. The Uni-Polarity Phase-Shifted Modulation Strategy for Single-Phase High-Frequency Link Inverter Based on De-Re-Coupling Idea and Dead Time Optimization[J]. Transactions of China Electrotechnical Society, 2018, 33(6): 1338-1346.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.161796 OR https://dgjsxb.ces-transaction.com/EN/Y2018/V33/I6/1338

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