Steady-State Modeling for LCC Resonant Converter with Phase Shift Modulation Based on Simplified State Trajectory

Abstract

The behavior of phase shift modulation (PSM) of LCC series-parallel resonant converter (LCC-SPRC) applied to high voltage (HV) DC pulsed power supply is analyzed in this paper, and three simplified state trajectory mathematical models for LCC SPRC with PSM is established. A method for solving the approximate numerical solution of each mode duration is proposed, by which the accurate mode switching points can be obtained. The accuracy of the modeling method and the approximate numerical solution method are verified by simulations and experiments with a 1.5kW prototype.