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一种移相控制的三相双向DC-DC变换器

, PP. 39-46

Keywords: 直流微网,高电压增益,星形-三角形变压器,双向变换器

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Abstract:

提出一种适用于直流微网场合的高电压增益双向DC-DC变换器。该变换器采用一种星形-三角形三相高频直流变压器结构,使得变换器工作在移相工作模式下,提高了变换器电压增益,且易于磁集成;同时该变换器在低压侧采用三倍整流电路,增加了低压侧电流脉动频率,减少了纹波,延长了蓄电池使用寿命。设计了一台低压侧直流输入电压为12V、高压侧直流输出电压为380V的500W原理样机,并验证了理论的正确性。当变换器工作在移相控制策略下,可实现变压器的伏秒平衡与变换器的高电压增益,同时兼顾了高效率。

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