研究了一种双极性增益Boost变换器,它不仅具有传统Boost变换器的升压特性,而且具有双极性增益特性,即对于正、负输入电压,均能得到正极性的直流输出电压。因此,该双极性增益Boost变换器可直接用于功率因数校正变换器。本文分析了该双极性增益Boost变换器工作于电感电流连续模式(ContinuousCurrentMode,CCM)时的工作模态,分析了正、负输入电压情况下,该双极性增益Boost变换器的直流稳态特性,分析结果表明该双极性增益Boost变换器具有与传统Boost变换器相同的升压特性。最后,通过实验验证了理论分析的正确性。
A bipolar gain Boost converter is studied in this paper. The working principle of this bipolar gain Boost converter is similar to the traditional Boost converter. It is found that the voltage transfer ratio of this converter is similar to that of conventional Boost converter. It can get stable dc output voltage no matter the input voltage is pos itive or negative. The bipolar gain Boost converter can be applied directly to the PFC converter without the front end diode bridge rectifier. The working principle of this bipolar gain Boost converter in continuous current mode is analyzed, and the steady state characteristic of the converter is studied. Finally, experimental verification of the a nalysis results is performed.