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一种新型的共用滞后桥臂的零电压开关混合型变换器

, PP. 113-119

Keywords: 全范围,软开关,共用滞后桥臂,恒频

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Abstract:

本文提出了一种新颖的实现滞后桥臂软开关的全桥混合型变换器。半桥LLC与全桥共用一个滞后桥臂,保证该桥臂开关管实现全范围的ZVS,LLC输出回馈到直流母线侧,变换器工作在恒定频率,总的输出由全桥通过移相来控制。同时使开关频率大于谐振频率,LLC输出功率在满足软开关情况下尽可能小,可有效降低损耗。最后研制了一台3kW样机,验证了该方案的可行性,实验结果表明滞后桥臂能够实现全范围的软开关。

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