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首页> 外文期刊>Power Electronics, IET >High step-up boost converter with passive lossless clamp circuit for non-isolated high step-up applications
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High step-up boost converter with passive lossless clamp circuit for non-isolated high step-up applications

机译：具有无源无损钳位电路的高升压升压转换器，用于非隔离式高升压应用

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摘要

Non-isolated high step-up DC-DC converters are required widely in the industrial applications. Many of these conventional DC??DC converters have the disadvantages of operating at high duty-cycle, high switch voltage stress and high diode peak current. The proposed converter can provide very high voltage gain without operating at high duty-cycle by employing a coupled inductor, a switched capacitor and an additional diode. At the same time, the switch voltage stress is reduced greatly, which is helpful to reduce the conduction losses by using a low on-resistance switch. The presented converter employs a passive lossless clamp circuit instead of an active clamp circuit to recycle the leakage energy, which is simpler and easier to design. Zero-current switching turn on performance is achieved due to the leakage inductance, and the switch voltage is clamped to the voltage on the clamp capacitor, which is helpful to reduce the switch voltage stress. Moreover, the reverse-recovery energy of the output diode and the leakage inductance energy are recycled. Finally, a 500 W prototype has been built to verify the analysis. The maximum efficiency of the prototype is 96.9% and the efficiency is higher than 96% over a wide load range.
机译：在工业应用中广泛需要非隔离式高升压DC-DC转换器。这些传统的DC-DC转换器中的许多具有在高占空比，高开关电压应力和高二极管峰值电流下工作的缺点。通过采用耦合电感器，开关电容器和附加二极管，提出的转换器可以提供非常高的电压增益，而无需在高占空比下工作。同时，开关电压应力大大降低，这有助于通过使用低导通电阻开关来降低传导损耗。提出的转换器采用无源无损钳位电路而不是有源钳位电路来回收泄漏能量，这更容易设计。归因于漏感，实现了零电流开关导通性能，并且开关电压被钳位到钳位电容器上的电压，这有助于降低开关电压应力。而且，输出二极管的反向恢复能量和漏电感能量被回收。最后，已建立了一个500 W的原型来验证分析。原型的最大效率为96.9％，并且在较宽的负载范围内效率均高于96％。

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  • 来源
    《Power Electronics, IET》 |2011年第8期|p.851-859|共9页
  • 作者

    Zhao Y.; Li W.; Deng Y.; He X.;

  • 作者单位

    National Laboratory of Power Electronics, College of Electrical Engineering, Zhejiang University, Hangzhou 310027, People's Republic of China;

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