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高降压比LLC谐振型直流变压器

, PP. 193-200

Keywords: LLC谐振变换器,直流变压器

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Abstract:

LLC谐振变换器是一种实用的软开关直流变换器,可在全负载范围内实现软开关。本文针对高压输入低压输出的高降压比场合,研究分析了变压器副边漏感对LLC谐振变换器增益的影响规律,提出了提高LLC谐振变压器外特性和效率的方法。针对高降压比变换需求,提出采用共用开关网络的多变压器PSSP拓扑结构有助于减小谐振漏感提高变压器外特性,分析了变压器参数差异对于均流的影响。论文给出了LLC谐振型软开关直流变压器的设计方法和调试方法,研制了一台250W原理样机。

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