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Short-circuit protection system and short-circuit protection method for isolated power converter

A technology for power converters and short-circuit protection, which is used in protection against overcurrent, emergency protection circuit devices, electrical components, etc. The effect of maintenance costs

Active Publication Date: 2012-07-25
HUAWEI DIGITAL POWER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The inventor found in the process of realizing the present invention that when the load circuit on the output side of the isolated power converter is short-circuited, the electronic switch at the input end of the isolated power converter is easily broken down by the instantaneous large current flowing through and damaged

Method used

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  • Short-circuit protection system and short-circuit protection method for isolated power converter
  • Short-circuit protection system and short-circuit protection method for isolated power converter
  • Short-circuit protection system and short-circuit protection method for isolated power converter

Examples

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Embodiment 1

[0021] An embodiment of the present invention provides a short-circuit protection system for an isolated power converter, such as figure 1 As shown, the isolated power converter includes: an input source 100, an electronic switch 101, and a transformer 102 connected to the input source 100 through the electronic switch 101, and the short circuit protection system of the isolated power converter includes:

[0022] The short-circuit detection module 200 is configured to send a short-circuit signal to the control module 201 when it is detected that the load circuit 103 of the isolated power converter is short-circuited;

[0023] The control module 201 controls the electronic switch 101 to disconnect the transformer 102 from the input source 100 when receiving the short circuit signal from the short circuit detection module 200 .

[0024] The isolated power converter realizes the current isolation between the input side and the output side of the isolated power converter through t...

Embodiment 2

[0033] An embodiment of the present invention provides a short-circuit protection system for an isolated power converter, such as figure 1 As shown, the isolated power converter includes: an input source 100, an electronic switch 101, and a transformer 102 connected to the input source 100 through the electronic switch 101, and the short circuit protection system of the isolated power converter includes:

[0034] The short-circuit detection module 200 is configured to send a short-circuit signal to the control module 201 when it is detected that the load circuit 103 of the isolated power converter is short-circuited;

[0035] The control module 201 controls the electronic switch 101 to disconnect the transformer 102 from the input source 100 when receiving the short circuit signal from the short circuit detection module 200 .

[0036] The isolated power converter realizes the current isolation between the input side and the output side of the isolated power converter through t...

Embodiment 3

[0066] An embodiment of the present invention provides a short-circuit protection method for an isolated power converter, the isolated power converter comprising: an input source 100, an electronic switch 101, and a transformer 102 connected to the input source through the electronic switch 101, Such as Figure 5 As shown, the method includes:

[0067] Step S101, when the short-circuit detection module 200 detects that the load circuit 103 of the isolated power converter is short-circuited, send a short-circuit signal to the control module 201;

[0068] Step S102 , when the control module 201 receives the short-circuit signal from the short-circuit detection module 200 , control the electronic switch 101 to disconnect the transformer 102 from the input source 100 .

[0069] Such as figure 1 As shown, the isolated power converter realizes the current isolation between the input side and the output side of the isolated power converter through the transformer 102, and transfers...

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PUM

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Abstract

The embodiment of the invention discloses a short-circuit protection system and a short-circuit protection method for an isolated power converter, which relate to the field of electronic circuits and can quickly protect the isolated power converter when a load on the isolated power converter is in short circuit, and greatly improve the reliability of the isolated power converter. According to the short-circuit protection system of the isolated power converter, the isolated power converter comprises an input source, an electronic switch, and a transformer connected with the input source through the electronic switch. The short-circuit protection system for the isolated power converter comprises a short circuit detection module for transmitting a short circuit signal to a control module when detecting that the load of the isolated power converter is in short circuit, and the control module for protecting the isolated power converter according to the short circuit signal when receiving the short circuit signal from the short circuit detection module.

Description

technical field [0001] The invention relates to the field of electronic circuits, in particular to a short-circuit protection system and method for an isolated power converter. Background technique [0002] An isolated power converter is characterized by providing galvanic isolation between its input and output circuits, that is, there is no current path that allows current to flow from the input side to the output side of the isolated power converter. Typically, an isolated power converter includes an energy transfer element, such as a transformer, to galvanically isolate the input side of the isolated power converter from the output side. [0003] In the process of implementing the present invention, the inventors found that when the load circuit on the output side of the isolated power converter is short-circuited, the electronic switch at the input end of the isolated power converter is easily broken down by the instantaneous large current and damaged. Contents of the ...

Claims

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Application Information

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IPC IPC(8): H02H7/10H02H3/08
Inventor 徐金柱
Owner HUAWEI DIGITAL POWER TECH CO LTD