A New ZVT Snubber Cell for PWM-PFC Boost Converter
A New ZVT Snubber Cell for PWM-PFC Boost Converter
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DOI：
10.1109/tie.2016.2608319
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发表时间：
2017
影响因子：
7.7
通讯作者：
H. Bodur;Suat Yildirmaz
中科院分区：
文献类型：
--
作者：
H. Bodur;Suat Yildirmaz
本文提出了一种新的零电压转换缓冲单元，用于工作在连续导通模式下的脉冲宽度调制（PWM）和功率因数校正（PFC）升压变换器。提出了一种新的家庭的PFC升压转换器实现这种新的ZVT缓冲单元。在这种新型的PFC升压变换器中，主开关管在零电压转换（ZVT）下完全导通，在零电压开关（ZVS）下关断。此外，辅助开关管在零电流开关下导通，在零电压开关下关断。主二极管和所有辅助二极管都在软开关下工作。在ZVT操作期间，缓冲电感上的开关能量通过Transformer转移到输出，因此电感和辅助开关的电流应力显著减小。此外，该Transformer确保使用足够的电容器用于ZVS关断主开关和辅助开关。主开关和主二极管不会受到任何额外的电压和电流应力。在这项研究中，详细的稳态分析提出了新的ZVT-PWM-PFC升压转换器，并验证了100 kHz和2千瓦的原型，这一理论分析。
In this paper, a new zero-voltage transition (ZVT) snubber cell is developed for pulse width modulated (PWM) and power factor corrected (PFC) boost converters operating in continuous conduction mode. A new family of PFC boost converter implemented with this new ZVT snubber cell is proposed. In this new PFC boost converter, the main switch is turned-on perfectly with ZVT and turned-off under zero-voltage switching (ZVS). Besides, the auxiliary switch is turned-on under zero current switching and turned-off under ZVS. The main and all auxiliary diodes are operating under soft switching. During ZVT operation, the switching energies on the snubber inductance are transferred to the output by a transformer, and so the current stresses of the inductance and the auxiliary switch are significantly decreased. Also, this transformer ensures the usage of sufficient capacitors for ZVS turning off of the main and auxiliary switches. The main switch and main diode are not subjected to any additional voltage and current stresses. In this study, a detailed steady-state analysis of the proposed new ZVT-PWM-PFC boost converter is presented and this theoretical analysis is verified by a prototype with 100 kHz and 2 kW.