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Commutation control method and system for bidirectional DC/DC converter

A control method and control system technology, applied in the field of bidirectional DC/DC converter commutation control method and system, capable of solving problems such as inaccurate current judgment, reduced system operation stability, and voltage overshoot

Active Publication Date: 2019-08-23
广东省洛仑兹技术股份有限公司
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  • Summary
  • 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

Method used

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  • Commutation control method and system for bidirectional DC/DC converter
  • Commutation control method and system for bidirectional DC/DC converter
  • Commutation control method and system for 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 commutation control method and system for a bidirectional DC / DC converter. The method and system are used for the bidirectional DC / DC converter, and the bidirectional DC / DC converter comprises a first end and a second end. The first end is connected with a power supply, and the second end is connected with a load, wherein a mode that the current flows from the first end to the second end is set as a forward working mode, and a mode that the current flows from the second end to the first end is set as a reverse working mode. The commutation control method comprises the steps: acquiring a first voltage of the second end; if the first voltage reaches a forward preset threshold value, switching the mode to the reverse working mode after processing, and acquiring a second voltage; if the second voltage reaches a reverse preset threshold value, switching the mode to the forward working mode after processing. Voltage overshoot and current overshootare reduced, and the operation stability of the system 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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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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