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在移相PWM DC/DC变换器中,通常采用PID调节器来提高变换器的目标值跟踪特性和干扰抑制特性。.由于这种方式为单自由度控制,所以它不能同时获得良好的目标值跟踪特性和干扰抑制特性。提出利用二自由度PID控制器实现对移相PWM DC/DC变换器的闭环控制,通过分别设汁目标值跟踪特性调节器和干扰抑制特性调节器,获得较好的目标值跟踪特性和干扰抑制特性。仿真和实验结果表明变换器的目标值跟踪特性和干扰抑制特性均获得了较好的结果。
In the phase-shifted PWM DC / DC converter, PID regulator is usually used to improve the converter’s target tracking and disturbance rejection characteristics. Since this method is a single degree of freedom control, it can not achieve both good target tracking and interference rejection. A two-degree-of-freedom PID controller is proposed to realize the closed-loop control of the phase-shifted PWM DC / DC converter. By setting the target tracking characteristic regulator and the disturbance rejection characteristic regulator respectively, better target tracking characteristics and interference suppression characteristic. Simulation and experimental results show that the target tracking characteristics and interference suppression characteristics of the converter have obtained good results.