Direct current-direct current switching converter

A technology of DC switch and converter, applied in the field of converter, can solve the problem of large current of DC-DC switch converter, etc.

Active Publication Date: 2015-07-29
SHANGHAI ZHONGKE SHENJIANG ELECTRIC VEHICLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] An embodiment of the present invention provides a DC-DC switching converter to overcome the problem of excessive current passing through the DC-DC switching converter caused by the interference of the signal detected by the single-chip microcomputer in the prior art

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Embodiment Construction

[0038] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. 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.

[0039] figure 1 Shown is a schematic structural diagram of a DC-DC switching converter provided by an embodiment of the present invention, as figure 1 As shown, the DC-DC switching converter includes:

[0040] The primary side circuit 101 is configured to output the first voltage corresponding to the power battery to the conversion circuit ...

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Abstract

The invention provides a direct current-direct current switching converter. When the first voltage drops, a converter control adjusting circuit can reduce the second current corresponding to a secondary side circuit according to changes of the duty ratio so that the output power of the secondary side circuit can be reduced. When the first voltage drops, the maximum current of a converter output load can be reset by the converter control adjusting circuit according to the changes of the duty ratio so as to reduce the load current, and therefore the output power of the converter is reduced, the input current of a primary side circuit is forced to be not increased under the condition that the input voltage drops, a switching tube of the primary side circuit is protected and cannot be burnt out due to the high current, and the service life of the direct current-direct current switching converter is effectively prolonged.

Description

technical field [0001] The invention relates to converter technology, in particular to a DC-DC switching converter. Background technique [0002] Since the DC-DC (Direct Current-Direct Current, referred to as: DC-DC) switching converter works normally, the bus input voltage will have normal voltage and undervoltage. When the bus input voltage is normal voltage, the DC -The DC switching converter works normally and outputs the maximum power. When the input voltage of the bus voltage is undervoltage, it will be protected by the undervoltage protection circuit, that is, when the voltage is low to a certain value, the bus is disconnected, so as to achieve Protect the role of the DC-DC switching converter. When the DC-DC switching converter works between the normal voltage and the undervoltage of the bus input voltage, it is necessary to limit the output power, because if the output of the DC-DC switching converter is not limited Power, the DC-DC switching converter still needs ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335
Inventor 杨士保肖欣李祖喜
Owner SHANGHAI ZHONGKE SHENJIANG ELECTRIC VEHICLE
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