微波应用器用高压直流LCC谐振变换器的设计

Design of High Voltage DC LCC Resonant Converter Used for Microwave Applicator

针对传统微波应用器工频高压寄生参数的问题,提出了一种采用全桥移相LCC串并联谐振网络的主电路拓扑,直接利用高频升压变压器漏感和分布电容作为LCC谐振变换器谐振元件,将寄生参数影响有效利用。设计了一个2 k W/4.6 k V全桥LCC高频谐振软开关变换器,应用PSIM软件对电路进行仿真分析。仿真结果验证了设计思想的正确性。

To solve the parasitic paremerters in traditional microware applicator,this paper proposed LCC series-parallel resonant circuit topology based on a phase-shifted full-bridge circuit,which can achieve soft switching by using the leakage inductance and distributed capacitance of transformer as the resonant component. Finally,the paper designed a high frequency 2 k W /4. 6 k V full-bridge LCC resonant converter,and this converter was simulated by using PSIM software. The simulation results prove the correctness of the design concept.