| 引用本文: | 蒋玮,胡仁杰,黄慧春.单级隔离升压半桥DC／DC变换器软开关条件研究[J].电力自动化设备,2011,31(2): |
| JIANG Wei,HU Renjie,HUANG Huichun.ZVS condition of single-stage isolated Boost half-bridge DC／DC converter[J].Electric Power Automation Equipment,2011,31(2): |
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| 摘要: |
| 为了获得单级隔离型升压半桥DC ／ DC变换器的软开关工作条件，对其工作原理和换流过程进行分析。通过稳态参数计算、开关管关闭工作模态的等效电路解析以及微分方程运算，指出了其软开关过程本质上是变压器漏感和开关管并联电容准谐振过程，并获得了实现软开关应满足的特征阻抗与变换器稳态参数之间的不等式关系，该不等式可以作为设计该变换器的依据。使用Matlab ／ Simulink进行了电路仿真，仿真结果表明，使用推导出的条件进行变换器软开关参数设计方便、准确，实用性较强。 |
| 关键词: 半桥DC／DC变换器 升压变换器 软开关 零电压开关 准谐振 |
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| ZVS condition of single-stage isolated Boost half-bridge DC／DC converter |
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JIANG Wei, HU Renjie, HUANG Huichun
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Southeast University，Nanjing 210096，China
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| Abstract: |
| The working principle and current flow of single-stage isolated Boost half-bridge DC ／ DC converter are analyzed to achieve its ZVS（Zero-Voltage Switching） conditions. By calculating the steady state parameters，analyzing the working mode when switches are off and solving the differential equations，it is revealed that，the ZVS is essentially the quasi resonance procedure between the leak inductance of transformer and the parallel capacitor of switch. The inequality between the equivalent impedance and the steady state parameters of converter is built，which could be used to design the converter. Circuit simulation is carried out with Matlab／Simulink. Simulative results show that，the converter design with the conditions deduced is convenient，precise and practicable. |
| Key words: half-bridge DC／DC converter Boost converter soft switching zero-voltage switching quasi resonance |
