基于全桥LLC谐振变换器的光伏逆变器升压DC/DC变换器设计

摘要

In order to improve the efficiency of DC/DC step-up converter in PV inverter and to reduce the volume of the inverter, a full-bridge resonant DC/DC converter is proposed in this paper. Design method of main circuit and L6599 based control circuit is introduced. The experiment show that this test inverter realize ZVS during every load conditions, and achieve the design requirement.%为了提高光伏并网逆变器中DC/DC升压变换器的效率，并减小变换器的体积，提出了一种基于全桥LLC谐振变换器拓扑的DC/DC升压变换器设计方案，并完成了基于L6599谐振控制器的变换器的主电路和控制电路的设计。实验结果表明，该变换器实现了在全负载范围内主开关管的零电压开通，具有较高的效率，达到了设计要求。