A Parallel-Output CLTCL Multi-Resonant Soft-Switching DC-DC Converter

F. Han, Zhun Meng
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引用次数: 2

Abstract

In this paper, a novel CLTCL multi-resonant soft-switching DC-DC converter is proposed. It employs the dual transformers architecture, whose secondary sides are connected in parallel. The resonant tank contains multiple resonant components of capacitors and inductors. Through the appropriate parameter design, the converter can transmit the 1st and the 3rd harmonic active power simultaneously. Consequently, the utilization rate of the resonant current and high efficient conversion are both guaranteed. Widely adjustable DC voltage gain range is also achieved within a narrow frequency range. Besides, all the power switches obtain the turn-on zero-voltage-switching (ZVS), while the diodes attain the turn-on and turn-off zero-current-switching (ZCS) or quasi ZCS (Q-ZCS). To verify the feasibility of the converter, a 500W prototype is built and tested. The proposed converter is able to maintain relatively high efficiency (around 95%) among a wide load range. The highest efficiency reaches 95.4% at 300W.
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一种并联输出CLTCL多谐振软开关DC-DC变换器
本文提出了一种新型的CLTCL多谐振软开关DC-DC变换器。它采用双变压器结构,二次侧并联。谐振槽包含电容器和电感的多个谐振元件。通过适当的参数设计,变换器可以同时传输一、三次谐波有功功率。从而保证了谐振电流的利用率和高效率的转换。在较窄的频率范围内也可实现广泛可调的直流电压增益范围。此外,所有的电源开关都实现了零电压开关(ZVS)的导通,而二极管实现了零电流开关(ZCS)或准零电流开关(Q-ZCS)。为了验证该变换器的可行性,建立了一个500W的样机并进行了测试。所提出的变换器能够在较宽的负载范围内保持相对较高的效率(约95%)。300W时效率最高,达到95.4%。
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