Dual CL/LLC DC/DC Resonant Circuit Modules For Step-up Power Interface in Microwave Magnetron Application

A double output DC/DC resonant converter topology that utilizes a dual CL/LLC resonant networks for microwave magnetron application is proposed in this paper. The proposed dual CL/LLC resonant converter is able to achieve soft-switching operation for all the semiconductor devices. The CL resonant network is used to provide the required high voltage gain for the magnetron, whereas the LLC resonant circuit network is used to provide the low voltage for the auxiliary supply for the magnetron (i.e. supply voltage for the filament). The descriptions and theoretical analysis of the proposed resonant converter will be discussed in this paper. Simulation results on a full-scale 300V/4kV design and hardware results on a laboratory-scale 50V/900V, 108kHz proof-of-concept prototype will be given to highlight the features of the proposed circuit.