Control method of DC-DC bidirectional converter

A bidirectional converter and control method technology, applied in the field of electronics, can solve the problems of unfavorable system digital sampling, low control loop bandwidth, system instability and oscillation, etc., achieve simple control scheme, improve loop response capability, and reduce heat dissipation requirements Effect

Active Publication Date: 2018-04-24
KEHUA DATA CO LTD +1
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Problems solved by technology

[0004] The traditional BOOST or BUCK control can only achieve one-way flow of energy in the same working mode, so it can only work in the discontinuous current mode (DCM) in the light load mode. At this time, due to the discontinuity of the inductor current, at this time Current sampling is easy to cause inaccuracy, which is not conducive to the digital sampling of the system, resulting in low bandwidth of the control loop, easy to cause unstable oscillation of the system, and reduce the reliability of the system

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  • Control method of DC-DC bidirectional converter
  • Control method of DC-DC bidirectional converter
  • Control method of DC-DC bidirectional converter

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[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0040] The core of the present invention is to provide a control method for a DC-DC bidirectional converter, which is used to realize the conversion of direct current, and has various conversion modes, and can realize high-voltage bidirectional conversion while making the inductor current continuous.

[0041] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be furt...

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Abstract

The invention discloses a control method of a DC-DC bidirectional converter. The method is applied to the DC-DC bi-directional converter. According to the charging and discharging requirements of a first power supply and the relation between the voltage of the first power supply and the voltage of a second power supply, the DC-DC converter is controlled in different time sequences. Therefore, thebidirectional conversion is realized. Meanwhile, the current of a whole-process inductor is continuous. As a result, the bidirectional dual-conversion of a high voltage capable of falling as well as rising can be realized.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a control method for a DCDC bidirectional converter. Background technique [0002] DC-DC converter, referred to as DC-DC converter or DCDC converter, is a DC conversion device that converts DC basic power supply into other voltage types, and is widely used in solar power generation, uninterruptible power supply and other fields. Its working principle is to convert DC power into another DC voltage (boost or buck). [0003] At present, the application of DCDC converter is more and more extensive. Different DCDC converters can be equivalent to step-up Boost converters or step-down Buck converters after simplified conversion. Taking the step-down Buck converter as an example, usually at full output load, the DCDC converter works in CCM, that is, continuous current mode. The average current of the inductor is the output load current. When the load current decreases, the averag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/157H02M3/158
CPCH02M3/157H02M3/1582
Inventor 黄詹江勇吴庆彬连海权
Owner KEHUA DATA CO LTD
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