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一种带耦合电感的有源钳位高增益Boost变换器

DOI: 10.13334/j.0258-8013.pcsee.2014.27.004, PP. 4576-4583

Keywords: Boost变换器,耦合电感,高增益,有源钳位

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Abstract:

该文提出一种带耦合电感的有源钳位高增益Boost变换器。通过引入耦合电感提高电压增益;采用有源钳位电路实现漏感能量的回收、抑制开关管关断电压尖峰,并为开关管实现零电压开通创造条件;通过合理设计漏感大小,有效解决二极管的反向恢复问题。该文所提变换器的主要不足是二极管的寄生电容和漏感会发生谐振,需要采用电阻电容二极管(resistor-capacitor-diode,RCD)吸收电路来抑制电压峰值。该文在分析变换器工作原理的基础上,对其性能进行了详细分析,最后搭建了一台48V输入、380V输出、额定功率为250W的试验样机,实测最高效率为94.5%,实验结果验证了理论分析的正确性。

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