基于三型补偿网络的开关电源电压控制研究

Research on Voltage Control in Switched-mode Power Supply Based on Type Ⅲ Compensation Network

对三型补偿网络进行理论分析,并将其应用于开关电源电压控制上。设计了正激式开关电源,阐述了补偿网络的零、极点配置方案,并对系统的稳定性、抗输入扰动能力及抗负载扰动能力进行了详细的仿真与分析。着重分析了与系统开环增益成正比的比例因数K对系统稳定性、抗输入扰动能力及抗扰动能力的影响。仿真波形和数据验证了补偿网络在提高系统稳定性、抗输入扰动能力及抗负载扰动能力的正确性和有效性。

Type Ⅲ compensation network was analyzed theoretically and applied in the control strategy of voltage regulation in the switched-mode power supply. A forward switched-mode power supply was designed,a zero and pole configuration scheme for the compensation network was explained,and the stability of the system as well as its resistance to input disturbance and load disturbance was simulated and analyzed in detail. The impact of proportional coefficient K（directly proportional to the open-loop gain of the system） upon the stability of the system as well as its resistance to input disturbance and load disturbance was analyzed emphatically. Simulation waveforms and datum verified that the compensation network was correct and effective in improving system stability as well as its resistance to input disturbance and load disturbance.