有源箝位正激式高频脉冲直流环节逆变器大信号特性

Large Signal Properties of Active Clamp Forward Mode Inverter with High Frequency Pulse DC Link

有源箝位正激式高频脉冲直流环节逆变器具有优良的综合性能。然而 ,当输入电源电压或负载大信号瞬变时 ,有源箝位电路的动态特性严重影响了变压器最大磁化电流和功率开关承受的最大峰值电压。本文采用平均状态轨迹法深入分析了闭环反馈控制、输入电压前馈控制有源箝位正激式高频脉冲直流环节逆变器瞬态大信号特性 ,获得了瞬态大信号特性与系统控制带宽、箝位支路谐振频率参数间的关系。

The active clamp forward mode inverter with high frequency pulse DC link has excellent comprehensive performance However, during the line and load transients, the maximum magnetizing current of the transformer and the peak voltage of the power switch are strongly affected by the active clamp circuit dynamics In this paper, the large signal properties of the active clamp forward mode inverter with high frequency pulse dc link for both close-loop feedback control and input voltage feedforward control are deeply investigated by using an average state trajectory approach The relationship between the transient large signal properties and the parameters such as the control bandwidth f c , the resonant frequency f r is gained