Phase-shifted full-bridge converter based on parallel coupled inductors and phase-shift between modules and modulation method thereof

By using parallel coupled inductors and phase-shifting between modules, a phase-shifting full-bridge converter achieves full-range zero-voltage switching, solving the problems of light-load ZVS loss and heavy-load duty cycle loss in traditional phase-shifting full-bridge converters, thus broadening the load regulation range while maintaining high efficiency.

CN122419218APending Publication Date: 2026-07-17CENT SOUTH UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CENT SOUTH UNIV
Filing Date
2026-04-29
Publication Date
2026-07-17

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Abstract

本发明公开了基于并联耦合电感和模块间移相的移相全桥变换器及其调制方法，该移相全桥变换器可利用PCI提供的能量，实现全范围零电压开关，从而能够将变压器漏感最小化，显著降低占空比丢失并拓宽负载调节范围。同时，重载条件下与PCI相关的损耗极低，使得变换器在全负载范围内均能保持高效率运行。该调制方法可实现PCI等效电感可调，即在轻载下利用较小的并联等效电感获得较大的并联电流，以实现极轻载ZVS；在重载下可获得较大的并联等效电感，进而减小并联电流，降低与PCI相关的损耗。
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