基于双DSP低电压大电流变换器的模糊PID控制

Fuzzy-PID Control for the Buck+Half-Bridge(d=50%)Converter based on DSP

讨论了带同步整流Buck+半桥(d=50%)低电压大电流DC/DC变换器的拓扑结构、工作原理及其优缺点。由于该变换器结构复杂、数学模型阶次高,给控制电路带来一定的困难,为此采用模糊PID控制策略进行控制,仿真与实验结果表明该控制方案可行且性能优越。

The topology,the principle and the characters of the Buck+HalfBridge(d=50%) low voltage large current converter are discussed.Because of the complexity and the high grades of the mathematic model of the converter,which makes the control difficult,here the FuzzyPID control strategy is used.Simulation and experiment results indicated that the controller presented above is feasible.