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Dynamic analysis of the fixed-frequency PWM LCC-type parallel resonant converter using discrete time domain modeling

Dynamic analysis of the fixed-frequency pulse width modulated LCC-type parallel (or series-parallel) resonant power converter is presented using discrete time domain modeling. First, the large-signal state-space model is derived and used to study the large signal behavior of the power converter in the event of large, nonlinear transient conditions. The results are verified using SPICE. The steady-state solution is obtained. Finally, the large signal equations are linearized about the steady-state equilibrium point to derive a linear small-signal model, which is used to study the small signal dynamic behavior of the power converter.