具有大范围升-降压功能的新型单级逆变电路

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Abstract This paper presents a high voltage ratio single-stage inverter (HVRSSI). Utilizing a unique LC structure instead of the traditional voltage source inverter DC link capacitor C yields a single-stage inverter with high step-up capability. The specific operating mode and buck-boost function implementation mechanism are studied. The shoot-through state is used to achieve substantial boost function of DC link peak voltage, and meanwhile improves the reliability of inverter. Unlike existing traditional single-stage inverter(ZSI), boost factor B of the proposed inverter and the shoot-through duty cycle D_sh are inversely proportional. A greater boost factor can be obtained with a small shoot-through duty cycle D_sh, hence the direct interactive relationship between shoot-through duty cycle D_sh and modulation index M is fundamentally overcame. Consistent with the traditional voltage source inverter, the output AC voltage of proposed high step-up inverter increases with the increasing of the M, which is different from the other single-stage inverters, and the consistency makes more rapid adjustment. Experimental results of the 1kW proposed inverter prototype are given for hardware verification. The theoretical analysis and simulation agrees well with experimental results.

Key words： Z-source inverter(ZSI) quasi-Z-source inverter single-stage inverter high voltage ratio

Received: 25 October 2013 Published: 05 November 2014

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TM46

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	Ding Xinping
	Zhang Chenghui
	Xue Bicui
	Zhang Min

Cite this article:

Ding Xinping,Zhang Chenghui,Xue Bicui等. A Novel High Voltage Ratio Single-Stage Inverter with Buck-Boost Ability[J]. Transactions of China Electrotechnical Society, 2014, 29(10): 73-80.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2014/V29/I10/73

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