| 改进型具有电压钳位的全桥ZVZCS PWM DC/DC变换器 |
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| 引用本文： | 孙铁成,郭建辉,王宏佳,梁联,朱雪秦.改进型具有电压钳位的全桥ZVZCS PWM DC/DC变换器[J].电工技术学报,2007,22(7):47-51. |
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| 作者姓名： | 孙铁成 郭建辉 王宏佳 梁联 朱雪秦 |
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| 作者单位： | 哈尔滨工业大学电气工程系,哈尔滨,150001 |
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| 摘 要： | 提出了一种改进型的具有有源钳位的全桥零电压零电流开关PWM DC/DC变换器.该变换器可以较好地实现超前桥臂开关管的零电压开关,以及滞后桥臂开关管的零电流开关.相对于传统的全桥零电压零电流DC/DC变换器,这种具有有源电压钳位的变换器可以减小由于谐振电路引起的变压器二次侧的振荡问题.它具有辅助电路简单、开关损耗低、导通损耗低和实现能量缓冲吸收等优点.详细分析了变换器的工作原理和特点,并通过一台1kW,100kHz的样机进行了验证.
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| 关 键 词： | 全桥变换器 零电压零电流开关 有源钳位 |
| 修稿时间： | 2007年2月28日 |
Improved Full-Bridge ZVZCS PWM DC/DC Converter Using Voltage Clamping |
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| Sun Tiecheng,Guo Jianhui,Wang Hongjia,Liang Lian,Zhu Xueqin.Improved Full-Bridge ZVZCS PWM DC/DC Converter Using Voltage Clamping[J].Transactions of China Electrotechnical Society,2007,22(7):47-51. |
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| Authors: | Sun Tiecheng Guo Jianhui Wang Hongjia Liang Lian Zhu Xueqin |
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| Affiliation: | Harbin Institute of Technology Harbin 150001 China |
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| Abstract: | An improved full-bridge (FB) zero-voltage and zero-current-switching (ZVZCS) PWM DC/DC converter using active voltage clamping circuit is proposed. The proposed DC/DC converter can achieve effective zero-voltage switching (ZVS) for the leading arm and zero-current switching (ZCS) for the lagging arm. The converter can alleviate voltage ringing and overshoot in secondary rectifier side due to resonance for conventional full-bridge ZVZCS DC/DC converter. It has many remarkable advantages such as simple auxiliary circuit, lower switching losses, reduced conduction losses and energy absorption. The operating principle and characteristics of the converter are analyzed. To validate the feasibility of the proposed converter, a 100kHz, 1kW prototype is implemented and tested. |
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| Keywords: | Full-bridge converter ZVZCS active voltage clamping |
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