摘要
在研制一台功率为5 kW,开关频率为30 kHz的FB-ZVZCS变换器时,为了提高系统的控制精度和动态响应速度,利用状态空间平均法建立了该变换器的小信号模型,推导出了系统的开环传递函数。针对该系统,设计了极点-零点补偿器,并且给出了补偿器设计原则。通过仿真,给出了补偿前后的系统幅频特性图,仿真结果表明补偿后系统的快速性得到提高,稳态误差减小到零。通过实验,给出了系统输出电压的动态特性图。实验结果表明,系统的控制精度以及动态响应速度均达到指标要求。
In designing a 60 V/83 A, 30 kHz converter using FB-ZVZCS technique, the small-signal model of the converter and open loop transfer function of the system are derived with state-space average method to improve the control accuracy and dynamic response rate of the converter. Based on the converter, pole-zero compensator is designed, and the principle of compensator design is proposed, The amplitude-frequency characteristics with compensating and without compensating are given by simulation. And the simulation results show that the dynamic response rate of the system is improved and the stable error is reduced to zero with compensating. Dynamic characteristics of the output voltage are obtained by experiment, and the experiment result shows that the control accuracy and dynamic response rate of the system reach the required qualification.
出处
《控制工程》
CSCD
2008年第3期302-305,309,共5页
Control Engineering of China
