摘要
在Buck-Boost隔离直流转换器宽范围输入电压的条件下,分析了典型的全桥boost转换器拓扑结构,由于存在的谐振电感包括漏电感,全桥Boost转换器只能采用双边沿调制[1],该转换器采用UC3895作为控制器,对全桥单元采用移相转换控制的方式,为了提高全桥boost转换器系统的可靠性和效率,采用三模式两频率控制方式[2],在输入宽范围电压的情况下,最高输入500V,输出360V,采用Matlab软件进行仿真,实验结果表明输入电压平均效率范围是96.2%,最高效率能达到97.5%。
The topology structure of a typical fuii-bridge Boost converters is analyzed under the condition of wide range input voltage of isolated Buck–Boost DC/DC converter.The FB Boost can only adopt two-edge-modulation（TEM） due to the resonant induction including the leakage induction.The converter takes UC3895 avaliable in market as the controller to control the FB-cell with phase-shifted conversion mode.In order to improve the reliability and efficiency of the FB-boost converter,a three-mode dual-frequency control mode is used.The maximum input voltage is 500 V,and the output 360 V in the case of the wide range input voltage.The Matlab software is adopted for simulation.The results show that average efficiency range of the input-voltage range is 96.2%,and the highest efficiency can reach to 97.5%.
出处
《电气传动自动化》
2013年第4期32-35,共4页
Electric Drive Automation
