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High Gain Three-Port DC-DC Converter Based on Switched Capacitor

A DC-DC, switched capacitor technology, applied in the conversion device for adjusting electrical variables, output power, converting DC power input to DC power output, etc. Discharge, boost voltage gain, reduce quantity effects

Active Publication Date: 2022-05-27
NANJING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the article "Three Port High Gain Non-isolated DC-DC Converter for Photovoltaic Applications" by VR Teja, the coupled inductor technology is used to increase the voltage gain, and a higher voltage output can be achieved by adjusting the turn ratio, but the existence of leakage inductance will make the switching tube Larger voltage stress on the upper surface and problems such as switching loss and EMI

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  • High Gain Three-Port DC-DC Converter Based on Switched Capacitor

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Embodiment Construction

[0015] The following combined with the accompanying drawings and specific embodiments, further illustrate the present invention scheme.

[0016] combine Figure 1 , the present invention proposes a high gain three-port DC-DC converter based on switched capacitor, comprising a first input source V in1 , the second input source V in2 , inductor L, first diode VD 1 , second diode VD 2 , third diode VD 3 , fourth diode VD 4 , fifth diode VD 5 , sixth diode VD 6 , the first power switch S 1 , the second power switch tube S 2 , the third power switch tube S 3 , the fourth power switch tube S 4 , the first capacitor C 1 , the second capacitor C 2 , the third capacitor C 3 , the fourth capacitor C 4 , load R; where the first input source V in1 The positive electrode is connected to the first diode VD 1 The anode, the first input source V in1 The negative electrode of the second input source V in2 The negative electrode, the first diode VD 1 The cathode is connected to the third power switch ...

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Abstract

The invention discloses a high-gain three-port DC-DC converter based on switched capacitors, which belongs to the field of power electronic converters. Based on the boost converter, the converter combines a switched capacitor unit composed of a switch tube, a capacitor and a diode, and a charge-discharge unit composed of a switch tube and a diode. By controlling the on and off of the four switch tubes, the circuit can be changed. The connection mode of the inductance and capacitance, and the on-off situation of the diode, so as to achieve the effect of increasing the voltage gain and charging and discharging. The invention has high voltage gain, reduces the number of devices used, and lowers the cost, and is suitable for new energy hybrid power generation systems such as fuel cells and photovoltaic cells.

Description

Technical field [0001] The present invention belongs to the field of power electronic converters, specifically relates to a high gain three-port DC-DC converter based on switched capacitors. Background [0002] With the progress and development of society, human beings pay more and more attention to energy scarcity, environmental pollution and other issues. New energy represented by solar energy, wind energy, and hydrogen energy has been developed as never before, but new energy sources such as solar energy and wind energy are intermittent and cannot be controlled according to demand, and auxiliary energy storage devices are needed to effectively utilize new energy sources such as solar energy and wind energy. For hybrid power systems with auxiliary energy storage, separate energy paths need to be established between the different input sources and outputs. The traditional hybrid power supply system uses discrete power conversion units to achieve energy transfer between various p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/158
CPCH02M3/158Y02E10/56
Inventor 赵曹辉叶伟琴戚志东唐钧涛陈豹张扬周礼锋
Owner NANJING UNIV OF SCI & TECH
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