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A non-transformer isolated dc-dc converter with large step-down ratio

A DC-DC, isolated technology, applied in the direction of output power conversion device, conversion equipment without intermediate conversion to AC, conversion of DC power input to DC power output, etc., can solve the problem that is not suitable for large ratio step-down applications etc. to achieve the effects of light weight, reduced loss, and good dynamic response

Active Publication Date: 2021-09-03
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the shortcomings are also obvious. The topology determines the voltage ratio. As the voltage ratio increases, the number of switched capacitors and active switch tubes increases. Therefore, the simple switched capacitor topology is not suitable for large variable ratio drops. Pressure application field

Method used

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  • A non-transformer isolated dc-dc converter with large step-down ratio
  • A non-transformer isolated dc-dc converter with large step-down ratio
  • A non-transformer isolated dc-dc converter with large step-down ratio

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Embodiment Construction

[0052] The present invention is described in further detail below in conjunction with accompanying drawing:

[0053] refer to figure 1 , the non-transformer isolated large step-down ratio DC-DC converter of the present invention includes an input power supply V in , the first capacitance C 1 , the first switch tube S 1 , the second switch tube S 2 , the third capacitor C 3 , the first inductance L 1 , the fourth switch tube S 4 , the second inductance L 2 , the second capacitance C 2 , the third switch tube S 3 and the fifth switch tube S 5 ;Input power V in The positive pole of the first capacitor C 1 The anode and the first switching tube S 1 connected to one end of the first switching tube S 1 The other end of the second switch tube S 2 One end of the capacitor and the third capacitor C 3 The positive terminal is connected, the third capacitor C 3 The negative pole of the first inductor L 1 One end of and the fourth switch tube S 4 One end is connected, th...

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Abstract

The invention discloses a non-transformer isolated DC-DC converter with a large step-down ratio. The positive pole of the input power supply is connected to the positive pole of the first capacitor and one end of the first switch tube, and the other end of the first switch tube is connected to the first switch tube. One end of the second switch tube is connected to the positive pole of the third capacitor, the negative pole of the third capacitor is connected to one end of the first inductor and one end of the fourth switch tube, the other end of the first inductor is connected to one end of the load resistor and the second inductor One end of the first capacitor is connected, the negative pole of the first capacitor is connected with the positive pole of the second capacitor, the other end of the second switch tube, the other end of the second inductor and one end of the fifth switch tube, the negative pole of the second capacitor, the input power supply Both the negative pole and one end of the third switching tube are grounded, and the other end of the third switching tube is connected to the other end of the fifth switching tube, the other end of the fourth switching tube and the other end of the load resistor, and the converter has low loss. At the same time, it has the characteristics of high efficiency, small size, light weight, and large voltage change ratio.

Description

technical field [0001] The invention relates to a DC-DC converter, in particular to a non-transformer isolated DC-DC converter with a large step-down ratio. Background technique [0002] Power electronics technology is an important supporting technology in the field of national economy and national security, and an important technical means to achieve energy conservation and environmental protection and improve people's quality of life. High-efficiency and high-quality power conversion is the ultimate goal of the development of power electronics technology. Non-isolated large ratio DC-DC converters are now widely used in DC distributed systems, portable electronic devices, communication systems, and voltage regulation modules. It is especially widely used in data centers. Since the load of data centers is increasing every year, it is expected that by the end of 2020, it will account for 10% of the total power consumption. The existing 12V DC bus voltage in the data center ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/07
CPCH02M3/07H02M3/072
Inventor 王来利于龙洋李超杰杨成子伍敏
Owner XI AN JIAOTONG UNIV
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