Single bootstrap level square-type high-gain converter

Abstract

The present invention discloses a single bootstrap level square-type high-gain converter which comprises an input power supply Vin. A positive electrode of the input power supply Vin is connected to one end of an inductor L1, and the other end of the inductor L1 being connected to an anode of a freewheeling diode D1 and an anode of a freewheeling diode D2. A cathode of the freewheeling diode D1 isconnected to one end of an inductor L2, one end of a capacitor C1 and an anode of a freewheeling diode D3. The other end of the inductor L2 is connected to one end of a capacitor C2, a cathode of thefreewheeling diode D2 and a drain electrode of the switch tube S. The other end of the capacitor C2 is connected to a cathode of a freewheeling diode D3 and an anode of an output rectifier diode Do.A cathode of the output rectifier diode Do is connected to one end of the output capacitor Co and one end of a load resistor R. The other end of the output capacitor Co, the other end of the load resistor R, a source electrode of the switch tube S and the other end of the capacitor C1 are connected to a negative electrode of the input power supply Vin. The efficiency and a gain ratio can be improved by the converter of the present invention.

Description

technical field [0001] The invention relates to a boost converter, in particular to a single bootstrap level square type high-gain converter. Background technique [0002] With the depletion of traditional fossil energy and the deteriorating environment of human beings, the development of clean renewable energy is imminent. All countries in the world are committed to the research and development of new energy applications, of which solar energy and wind energy have been obtained a wider range of applications. However, for these systems, how to operate grid-connected and meet the high voltage requirements in the grid is still the most important issue. At present, a large number of boost converters have been developed to meet these applications. Among different converters, the traditional BOOST converter can theoretically increase the voltage gain by increasing the duty cycle. However, in practical applications, due to the limitation of parasitic parameters, very high voltag...

AI Technical Summary

Problems solved by technology

However, in practical applications, due to the limitation of parasitic parameters, very high voltage gain cannot be achieved

If a cascaded topology is used, the problem of low efficiency caused by the increase in the number of devices will be highlighted again.

Images