新型交错并联反激变换器的稳定性研究

新型交错并联反激变换器具有电路结构简单,开关管电压尖峰小且无漏感能量损耗等优点,且其输入、输出电流脉动为开关频率的两倍,大大减小了输入与输出滤波器的体积。本文介绍了采用连续建模的状态空间平均法,建立了新型交错并联反激式DC-DC变换器在连续导电模式下的稳态及小信号数学模型,并利用控制理论,对单电压环反馈控制方式下的新型交错并联反激变换器系统进行了稳定性分析及校正设计,并通过MATLAB软件仿真及实验验证了以上理论分析的正确性。

Stability Analysis of the Novel Interleaved Flyback Convener

The novel interleaved flyback converter provides the benefit of simple structure, reducing voltage stress of the switch, recy-cling transformer leakage inductance energy, and the frequency of input and output current ripple is twice of the frequency of the switch, which significantly reduces input and output filters size. With the average state space method, the author constructs a stability and small signal mathematic model of the novel interleaved flyback DC-DC converter. The compensation and stability analysis is dis-cussed using the control theory for single-circle of voltage-mode feedback control circuit. The simulation and experimental results verified the theory analysis.