摘  要：该文为提高推挽变换器的电流稳定性和系统可靠性，通过分析了DC/DC推挽变换器的工作原理，在此基础上建立了小信号数学模型。并施以电流型双环控制策略，有效的提高系统的动态响应和保护能力。给出了推挽变换器的控制系统的设计过程，并进行了仿真和实验研究，结果表明针对推挽变换器，双环控制策略具有良好动态和静态控制性能。
关键词：推挽电路；平均电流模式；数学建模

Abstract: In order to improve the current stability and reliability of the push-pull converter, this paper analyzed the push-pull DC/DC converter operational principle, and on this basis, built its small signal mathematical model. With imposing the current-mode dual-loop control strategy into its control system, improved the system dynamic response and protection ability. It has given the design process of the control system of push-pull converter, simulation and experimental research also has been done in the paper. The simulation and experimental results showed that, in view of the push-pull converter, the dual-loop control strategy has got a good dynamic and static control performance.
Key words: push-pull；average current model；mathematical model