摘要
双闭环控制在开关电源中的应用非常普遍,是因为它使系统具有较好的动态性和稳定性。文章就是在双闭环控制的反激电路中,分析了反激变换器的功率级电路的平均模型和控制电路中TL431和光耦器件的非理想模型;运用控制理论写出整个变换器系统闭环的环增益,并且用网络分析仪测出系统环增益,结果表明系统具有良好的稳定性和动态性。
Application of the double closed loop control has already been popular in SMPS , because such a system has a fast dynamic response and good stability. In this paper, the small signal of single-ended flyback converter with double closed loop control is analyzed first, then the not ideal small signal of TI.,431 and optocoupler in the control loop is presented too; based on the control theory the mathematic expression of the loop gain is educed ,at last the experimental results shows good stability and fast responsibility with the help of network analyzer.
出处
《通信电源技术》
2008年第3期30-32,共3页
Telecom Power Technology
