A precise modeling and resonant calculation method are proposed for variable mode LLC resonant converter. With normal operation of the converter, the redundancy of components is reduced. By establishing equivalent circuit model considering device char...
A precise modeling and resonant calculation method are proposed for variable mode LLC resonant converter. With normal operation of the converter, the redundancy of components is reduced. By establishing equivalent circuit model considering device characteristics, DC gain function is deduced. The resonant parameters are solved by simulated annealing algorithm. The DC gain obtained by the general algorithm and the proposed algorithm are compared. The stable operation of the converter is realized by using the control strategy of digital voltage controlled oscillator and intermittent modulation strategy. The feasibility of this research is verified by simulation and experiment.