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一种新型正激零电压零电流转换PWM DC/DC变换器

A Novel Forward DC/DC Converter with ZCZVT
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摘要 提出一种新型的零电压零电流转换(ZCZVT)的正激拓扑。拓扑工作频率为300kHz,能实现主开关管的零电压开通(ZVS)和零电流关断(ZCS),同时辅助开关管也能实现零电流关断(ZCS),且变压器的磁通复位不需要辅助绕组。文章进行了拓扑的稳态分析,并且讨论了谐振电路的参数设计。最后,在研制一台48V输入、12V/100W输出样机的基础上,实验验证这种新型正激ZCZVT PWM DC-DC变换器的软开关特性。 A novel zero current-zero-voltage transition (ZCZVT) forward converter is presented in this paper. The proposed converter is operating at 300 kHz and processes the features of both zero- voltage transition (ZVT) at turn on and zero-current transition (ZCT) at turn off for the main switch. The auxiliary switch also achieves zero- current switc hing (ZCS). The flux of transformer can be reset without tertiary winding. The steady- state analysis and design considerations are investigated in detail in this work. For 48 V input and 12 V 100 W output, a prototype of the proposed converter for 300 kHz switching is built to verify the theoretical analysis of soft switching.
出处 《通信电源技术》 2007年第6期51-54,共4页 Telecom Power Technology
关键词 正激变换器 软开关 零电压零电流转换(ZCZVT) forward converter soft switching zero- current and zero-voltage transition (ZCZVT)
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参考文献3

  • 1[2]Stein C M de O,Hey H L.A true ZCZVT commutation cell for PWM converter[J].IEEE Trans.Power Electron.2000,15(1):185-193.
  • 2[3]Bodur,H Bakan.A F A new ZVT-ZCT-PWM DC-DC converter[J].IEEE Trans.Power Electron.2004,19,(3):676-684.
  • 3[4]王志强译.开关电源设计[M].北京:电子工业出版社,2005.

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