A METHOD FOR BOOST WITH LOW LOSS AND ITS DEVICE

摘要

The invention is related a method and device for boost with low loss which applies to converting equipments of power supply or similar power system. The method of the invention is the duty cycle of the power switch is controlled by controlling the on and off of the power switch The boost and regulating of the output voltage are accomplished by the storage of the inductor The reverse recovery current of the free-wheeling diode is reduced by the auxiliary inductor It is characterised in that the secondary winding of the inductor is connected to the storage capacitor to supply the energy for it, and to supply a path for the auxiliary inductor transferring the energy to the storage capacitor. There is high and enhanced efficiency in the invention. It applies to switch power supplies which are inputted commercial power such as communication power supplies and uninterrupted power supplies.