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Four-port converter with symmetrical bipolar output and control method

A bipolar, four-port technology, applied in the direction of output power conversion device, control/regulation system, DC power input conversion to DC power output, etc., can solve the problem of no isolation between input port and output port, low reliability, voltage Gain is limited and other problems, to achieve the effect of flexible voltage relationship, high reliability, and wide application range

Inactive Publication Date: 2021-05-14
SOUTHWEST JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, the existing multi-port converters often have only one load terminal, which can only provide a DC bus of one voltage level, which cannot meet the requirements of multiple loads of different voltage levels connected to the system at the same time, and there is still a gap between the input port and the output port. There is no isolation between them, the voltage gain is limited, and the reliability is low.

Method used

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  • Four-port converter with symmetrical bipolar output and control method
  • Four-port converter with symmetrical bipolar output and control method
  • Four-port converter with symmetrical bipolar output and control method

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Embodiment Construction

[0025] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0026] A four-port converter with symmetrical bipolar output, the converter can simultaneously access the first power source V in1 , the second power source V in2 And load, and can output symmetrical and common ground bipolar voltage, less circuit components, high power density, wide application range, simple power management and control.

[0027] Such as figure 1 As shown, the circuit schematic diagram of the first four-port converter with symmetrical bipolar output, including the first power source V in1 , the second power source V in2 , positive polarity output port V o1 , negative polarity output port V o2 , the first input filter capacitor C in1 , the second input filter capacitor C in2 , the first output filter capacitor C o1 , the second output filter capacitor C o2 , the first inductance L 1 , the second inductance L 2 , t...

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Abstract

The invention discloses a four-port converter with symmetrical bipolar output and a control method. When the power of a first input source is greater than that of a load, the converter works in a single-input three-output mode, namely the first input source charges a second input source and supplies power to the load at the same time; and when the first input source power is lower than the load power, the first input source and the second input source simultaneously supply power to the load. The converter can output symmetrical and common-ground bipolar voltages at the same time, two power sources and a plurality of loads can be connected into a system at the same time through one converter, and energy management between the sources and the loads can be achieved through corresponding control.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a four-port converter with symmetrical bipolar output and a control method. Background technique [0002] With the rapid development of today's society, the demand for energy is increasing day by day. As non-renewable energy, fossil energy is gradually facing exhaustion, and in the process of releasing energy, fossil energy will produce a large amount of carbon dioxide, sulfur dioxide and other gases, which aggravates the global greenhouse effect and environmental protection. pollute. For the sustainable development of human society, countries around the world have reached a consensus on developing renewable energy and gradually replacing fossil energy with limited resources and pollution to the environment. Compared with conventional energy sources such as coal, oil, and natural gas, the output power of new energy power generation equipment has the characteristics of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335H02M3/158
CPCH02M3/1582H02M3/33592
Inventor 周国华徐能谋田庆新
Owner SOUTHWEST JIAOTONG UNIV
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