零电压开关多谐振变换器的仿真与优化设计

Computer simulation and design optimization for zero-voltage--switching multi--resonant converters

研究了降压型和正激型两种类型的半坡零电压开关（ＺＶＳ）多谐振变换器（ＭＲＣ）。基于直流分析数字仿真程序，将非线性优化方法应用于 ＺＶＳ－ＭＲＣ的谐振开关设计，寻求谐振参数的最佳位，使谐振开关总功耗（正激电路中还包括变压器铁损）最小，并满足若干非线性约束及离散取值约束。应用连续与离散非线性规划算法计算。最优设计结果用数字仿真及试验电路检验．

Two types (buck and forward) of the half wave zero- voltage-switching (ZVS) multi-resonant converters (MRCs) are investigated. Based on the computer simulation software for the D. C. analyses of both buck and forward MRCs the nonlinear design optimization methods for the resonant tanks of the ZVS-MRCs are used to find the optimal resonant parameters in the sense of minimizing the total loss of the resonant switches(including the transformer loss of the forward converter)subject to several nonlinear and discrete constraints. Both continuous and discrete nonlinear programming algorithm are adopted. The optimal design results were verified by computer simulation and trial circuit experiments.