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Single bootstrap cascade DCDC converter

A converter, cascade technology, applied in the direction of converting DC power input to DC power output, instruments, adjusting electrical variables, etc., can solve the problems of unrealizable, high voltage gain, low efficiency, etc., to increase switching loss, increase voltage gain, effect of superior boost performance

Inactive Publication Date: 2018-05-29
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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  • Single bootstrap cascade DCDC converter
  • Single bootstrap cascade DCDC converter
  • Single bootstrap cascade DCDC converter

Examples

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Embodiment Construction

[0021] The technical solution of the present invention will be further introduced below in combination with specific embodiments.

[0022] This specific embodiment discloses a single bootstrap cascaded DCDC converter, such as figure 1 shown, including the input supply V in , input supply V in The positive poles of the inductors are respectively connected to L 1 One end of the freewheeling diode D 3 the anode, the inductor L 1 Connect the other end of the capacitor C 2 One end of the freewheeling diode D 2 the anode of the capacitor C 2 The other ends are connected to the freewheeling diode D 3 cathode and freewheeling diode D 1 anode of the freewheeling diode D 1 The cathodes are respectively connected to the inductor L 2 One end and the capacitor C 1 at one end, the inductance L 2 The other ends are connected to the freewheeling diode D 2 The cathode, the drain of the switching tube S and the output rectifier diode D o anode of the output rectifier diode D o Th...

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Abstract

The invention discloses a single bootstrap cascaded DCDC converter including an input power supply Vin. A positive electrode of the input power supply Vin is connected to one end of an inductor L1 andan anode of a freewheeling diode D3, and the other end of the inductor L1 is connected to one end of a capacitor C2 and an anode of a freewheeling diode D2. The other end of the capacitor C2 is connected to a cathode of the freewheeling diode D3 and an anode of a freewheeling diode D1. A cathode of the freewheeling diode D1 is connected to one end of an inductor L2 and one end of a capacitor C1.The other end of the inductor L2 is connected to the cathode of the freewheeling diode D2, a drain electrode of a switch tube S, and an anode of an output rectifier diode Do. A cathode of the output rectifier diode Do is connected to one end of an 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 electrodeof the switch tube and the other end of the capacitor C1 are connected 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 cascaded DC-DC 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 voltage gain cannot...

Claims

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Application Information

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IPC IPC(8): H02M3/156
CPCH02M3/156H02M1/007
Inventor 林明耀刘同民艾建
Owner SOUTHEAST UNIV
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