新型试验电源直流降压斩波系统的PID控制仿真研究

摘要

To solve the problems with output voltage instability, IGBT switching loss is big, nonlinear interference system is strong in the DC buck chopper circuit of the new test power with small locomotive, in the part of chopping circuit adopts PID control strategy to output PWM pulse for control IGBT switch action and DC buck chopper. In this paper, the principle of PID control DC buck chopper were expounded, and the simulink of MATLAB is used for circuit simulation and analysis of the simulation results, it shows that under the PID control of DC buck chopper is able to achieve the desired goal, and it is easier to control and operation of the whole system.%为解决小机车新型试验电源直流降压斩波电路中存在的输出电压不稳定、IGBT开关损耗大、系统非线性干扰强等问题,斩波电路部分采用PID控制策略进行PWM脉波输出控制IGBT开关动作和直流降压斩波。本文就PID控制直流降压斩波原理进行了阐述,并采用MATLAB中的simulink进行了电路部分的仿真,分析仿真结果表明,PID控制下的直流降压斩波能够达到预期的目标,更易于整个系统的控制和运行。