Isolated bidirectional resonance soft switching DC-DC converter

A DC-DC and converter technology, applied in the field of bidirectional DC-DC converters, can solve the problems of converter reliability and power density adverse effects, poor consistency of voltage gain curve, poor reverse gain characteristics, etc., to improve bidirectional Voltage gain adjustment capability, beneficial to power density, effective adjustment effect

Active Publication Date: 2020-06-05
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional LLC-type converter is limited in bidirectional power transfer applications due to the poor consistency of voltage gain curves in forward and reverse modes.
Although some scholars have proposed some solutions to the problem of poor LLC inverse gain characteristics fr

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  • Isolated bidirectional resonance soft switching DC-DC converter
  • Isolated bidirectional resonance soft switching DC-DC converter
  • Isolated bidirectional resonance soft switching DC-DC converter

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Embodiment Construction

[0028] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0029] The details of the isolated bidirectional resonant soft-switching DC-DC converter provided in this embodiment are as follows:

[0030] 1. About its topology:

[0031] Such as figure 1 As shown, the left port of the converter in this embodiment is connected to the high-voltage side DC voltage, and the right port is connected to the low-voltage side DC voltage. In order to achieve resonance in the middle transmission process of power to reduce losses, this topology adopts a dual active bridge structure to realize DC-AC-DC conversion, and both the active bridge on the high voltage side and the active bridge on the low voltage side can adopt a full bridge structure or a half brid...

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Abstract

The invention discloses an isolated bidirectional resonance soft switching DC-DC converter. A topological structure of the isolated bidirectional resonance soft switching DC-DC converter comprises twoactive bridges and a resonant cavity, the converter is simple in topological structure and is convenient to realize magnetic integration, thereby having the potential of realizing the high power density. Meanwhile, the converter can realize the wide-range flexible adjustment of the bidirectional voltage gain by means of a simple frequency conversion control mode, so that the reliability is enhanced. In addition, the converter can realize the zero-voltage switching-on (ZVS) of an inverter switching tube and the zero-current switching-off (ZCS) of a rectifier switching tube in a very wide range, so that the switching loss is greatly reduced. The converter can be applied to various occasions needing bidirectional power flow, such as an energy storage system, a storage battery charging and discharging controller in an electric automobile, a switching power supply, etc.

Description

technical field [0001] The invention relates to the technical field of bidirectional DC-DC converters, in particular to an isolated bidirectional resonant soft-switching DC-DC converter. Background technique [0002] With the rapid consumption of traditional fossil energy (such as oil, coal, natural gas, etc.) and the aggravation of environmental pollution, the rational and effective use of energy has attracted people's attention. Renewable energy has attracted extensive attention due to its advantages of sustainable use and cleanliness. For renewable energy, systems such as solar photovoltaic power generation, wind power generation and fuel cell power have received more and more attention. Although some fruitful results have been achieved, due to the inherent intermittent and violent nature of renewable energy The volatility of the global economy means that many challenges still need to be solved. In order to suppress voltage fluctuations and improve the utilization rate ...

Claims

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Application Information

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IPC IPC(8): H02M3/335
CPCH02M3/33584H02M3/33592H02M1/0058Y02B70/10
Inventor 王萍马晓晨
Owner TIANJIN UNIV
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