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Bidirectional DC-DC converter

A DC-DC, bidirectional DC technology, applied in the field of converters, can solve problems such as reducing the output side current

Pending Publication Date: 2021-05-28
安徽拓高电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the conventional bidirectional DC-DC converter 10 with input and output common ground is limited in realizing it as a high-efficiency power converter because it takes The time of the switching reduces the current on the output side due to the high time ratio of the

Method used

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Examples

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Embodiment Construction

[0026] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0027] Such as figure 2 As shown, the bidirectional DC-DC converter 100 of the present invention includes a charging and discharging unit 110 , a switching unit 120 and an output unit 130 .

[0028] The bidirectional direct current DC-DC converter 100 operates in a step-up mode from the input side to the output side, that is, from the input power source 1 to the output unit 130, and operates in a step-down mode in the direction from the output side to the input side .

[0029] Since the input power source 1 and the output unit 130 have the same reference potential, the bidirectional DC-DC converter 100 of the present invention can realize a common ground, and thus is suitable for vehicles with dual power supply systems.

[0030] The charging and discharging unit 110 receives power from the input power source 1 and charges with the power, or discharges the charged ...

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Abstract

The invention discloses a bidirectional DC-DC converter. The bidirectional DC-DC converter comprises a charging and discharging unit, a switching unit and an output unit in a boost mode. The charging and discharging unit charges and discharges input power. The switching unit is disposed between the input power supply and the charging and discharging unit, and charges the charging and discharging unit by using the input power or returns the power stored in the charging and discharging unit to the output side. The output unit is connected to an output side of the charging and discharging unit, and receives input power and power stored in the charging and discharging unit, and provides output power. The output unit and the input power are commonly grounded at the same potential. The bidirectional DC-DC converter provided by the invention has the advantage that the soft switching is applied to the dual power supply system of the vehicle because the input and the output are grounded together. And power conversion can be realized by using a low-capacity inductor.

Description

technical field [0001] The invention belongs to the field of converters, and relates to a bidirectional DC-DC converter. Background technique [0002] Recently, due to increased demand for high fuel efficiency due to concerns about global warming, research on stop-start system technology in which the operation of the engine is stopped during the no-load operation of the engine has been actively conducted. Cars in automotive systems to reduce energy consumption. [0003] Since the fuel consumed by the idling operation of the vehicle accounts for about 5-8% of the total fuel consumed, the stop-start system is also applied to the hybrid vehicle. Typically, stop-start systems must employ engine starter motors operating at high voltages to maximize efficiency, and configure 48-V voltage systems to operate the engine starter motors. Therefore, in the case of hybrid vehicles, a dual power supply system has been introduced where the existing 12V voltage system is employed for low ...

Claims

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Application Information

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IPC IPC(8): H02M3/156H02M1/32
CPCH02M1/32H02M3/156
Inventor 高亚力
Owner 安徽拓高电子科技有限公司
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