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A current mode dc/dc isolation converter

A technology for isolating converters and transformers, which is applied in the direction of adjusting electrical variables, converting DC power input into DC power output, and converting AC power input into DC power output, etc. Complex, small influence of load shedding, simple effect of constant current control

Active Publication Date: 2022-07-12
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a current-mode DC / DC isolation converter to realize constant current output and solve the problem of complex output current control

Method used

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  • A current mode dc/dc isolation converter
  • A current mode dc/dc isolation converter
  • A current mode dc/dc isolation converter

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Embodiment 1

[0033] This embodiment is used to provide a soft-switching three-phase current-mode DC / DC isolation converter that can combine the advantages of current-mode converters and resonant conversion soft-switching, and can achieve high power output, low loss, direct constant current control, and wide output. The voltage range is suitable for the needs of electric vehicle battery charging system. It can solve the high power level requirements of electric vehicle battery charging. The low power level of the DC / DC isolation converter cannot meet the needs, the switching device loss is large, the converter efficiency is low, and the output current Control complex issues. like figure 1 As shown, the isolation converter includes a control module 1 , a current input module 2 , an inverter module 3 , a resonance module 4 , an isolation module 5 and a conversion module 6 .

[0034] The current input module 2 is used to provide a direct current with a current source property.

[0035] The c...

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Abstract

The invention relates to a current-type DC / DC isolation converter, comprising a control module, a current input module, an inverter module, a resonance module, an isolation module and a conversion module. The current input module is used to provide DC current, and the control module is used to apply a drive signal of any frequency to the inverter module. The inverter module converts the DC current into a three-phase AC current when triggered by the drive signal. The resonant module is used for frequency conversion control, and finally the three-phase AC current is converted into a constant DC by the conversion module, and the load is charged by the constant DC. The current value of the constant DC is determined by the frequency of the driving signal. Furthermore, through the isolation converter provided by the present invention, the output current can be directly controlled by changing the frequency, the constant current control is simple, and it perfectly matches the charging characteristics of the battery. , the impact of load shedding is small, and the problem of complex output current control is solved.

Description

technical field [0001] The invention relates to the technical field of power electronic energy conversion circuits, in particular to a soft-switching three-phase current type DC / DC isolation converter suitable for charging electric vehicles. Background technique [0002] With the shortage of petroleum energy and serious environmental pollution, the popularization and promotion of new energy electric vehicles has become the general trend. As the main energy storage equipment of electric vehicles, the battery has a large voltage conversion range. The charging power supply and charging method directly affect the service life and cost of the battery pack. Therefore, the DC / DC isolation converter used in the charging of electric vehicles must have a wide voltage gain. , high efficiency, simple and reliable charging process control and so on. At present, the voltage-type half-bridge LLC resonant converter, which combines the advantages of the relatively high power of the half-bri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/335H02M7/5387
CPCH02M3/33569H02M7/5387Y02T90/14
Inventor 王立乔李建霞单明杰张迪王鹏磊
Owner YANSHAN UNIV