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Method and system for commutation control of a bidirectional dc/dc converter

A technology of control system and control method, applied in control/regulation system, conversion of DC power input to DC power output, instruments, etc., can solve problems such as inaccurate current judgment, voltage overshoot, and reduced system operation stability.

Active Publication Date: 2021-03-30
广东省洛仑兹技术股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the isolated bidirectional DC / DC converter performs bidirectional switching control operation, it is necessary to judge the operating direction of the circuit according to the operating point of the circuit to select the control circuit for forward or reverse operation, and switch back and forth between the forward control circuit and the reverse control circuit. When the load is light, the judgment of the change of the current will be inaccurate, and the problem of voltage overshoot will occur when the working mode is switched, resulting in a decrease in the stability of the system operation

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  • Method and system for commutation control of a bidirectional dc/dc converter
  • Method and system for commutation control of a bidirectional dc/dc converter
  • Method and system for commutation control of a bidirectional dc/dc converter

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Embodiment Construction

[0042] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention.

[0043] The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations. Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present invention.

[0044] Hereinafter, the terms "comprising",...

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Abstract

The embodiment of the invention discloses a bidirectional DC / DC converter commutation control method and system. Applied to a bidirectional DC / DC converter, the bidirectional DC / DC converter includes a first terminal and a second terminal, the first terminal is used to connect the power supply, and the second terminal is used to connect the load, wherein the current flows from the first terminal to the second terminal The two terminals are preset as the forward working mode, and the current flowing from the second terminal to the first terminal is preset as the reverse working mode. The commutation control method includes obtaining the first voltage of the second terminal. If the first voltage reaches the forward preset Threshold, after processing, switch to the reverse working mode, and obtain the second voltage; if the second voltage reaches the reverse preset threshold, switch to the forward working mode after processing. The voltage overshoot and current overshoot are reduced, and the stability of the system operation is also improved.

Description

technical field [0001] The invention relates to the technical field of power electronics applications, in particular to a commutation control method and system for a bidirectional DC / DC converter. Background technique [0002] The bidirectional DC / DC converter is a DC-to-DC converter that can adjust the bidirectional transmission of energy according to the needs of energy. It can be widely used in electric vehicles, distributed power generation systems, intelligent charging and discharging machines, etc., and has broad application prospects. When the isolated bidirectional DC / DC converter performs bidirectional switching control operation, it is necessary to judge the operating direction of the circuit according to the operating point of the circuit to select the control circuit for forward or reverse operation, and switch back and forth between the forward control circuit and the reverse control circuit. When the load is light, the judgment of the change of the current will...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/335H02M1/32
CPCH02M1/32H02M3/3353H02M1/0003
Inventor 陈真童如德
Owner 广东省洛仑兹技术股份有限公司
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