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Direct-current bus bar short-circuit protection device and method

A short-circuit protection and DC bus technology, applied in the direction of DC network circuit devices, emergency protection circuit devices, circuit devices, etc., can solve the problems that the power supply bus bar cannot actively restore the power supply, and the circuit cannot be actively restored.

Pending Publication Date: 2021-01-19
CHINA HELICOPTER RES & DEV INST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of this design are as follows: the circuit cannot be actively restored, resulting in a power failure of the power supply bus and cannot actively restore the power supply

Method used

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  • Direct-current bus bar short-circuit protection device and method

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Embodiment Construction

[0027] The technical scheme of the present invention judges whether the bus bar is short-circuited by detecting the current and voltage of the bus bar. If there is a short circuit, it outputs a discrete control to disconnect the power supply contactor, thereby disconnecting the bus bar from the power supply and achieving the purpose of protecting the power supply.

[0028] The specific control process includes the following processes:

[0029] The controller obtains the voltage signal and current signal of the power supply bus bar in real time;

[0030] When the voltage signal and current signal meet the preset short-circuit condition, output a disconnection control signal to the control signal input terminal of the contactor; the disconnection control signal is used to disconnect the contactor, so that the DC power supply is isolated from the power supply bus bar;

[0031] When the voltage signal and the current signal meet the preset recovery conditions, output a turn-on con...

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Abstract

The invention belongs to the technical field of aviation electrical control, and discloses a direct-current bus bar short-circuit protection device and method; the device comprises a direct-current power supply, a contactor, a current detection element, and a controller. The controller is provided with a voltage detection input end, a current detection input end and a control signal output end; the direct-current power supply, the contactor and the current detection element are electrically connected in sequence; the voltage detection input end of the controller is connected with the voltage output end of the power supply bus bar, the current detection input end of the controller is connected with the current detection end of the current detection element, and the control signal output endof the controller is connected with the control signal input end of the contactor. The current detection end of the current detection element is connected with the current output end of the power supply bus bar; the electrical detection element is used for detecting the working current and the working voltage of the bus bar, and the working current and the working voltage are judged and then subjected to automatic short-circuit protection control through the computer; once the circuit returns to normal, the bus bar power supply circuit can be switched on again.

Description

technical field [0001] The invention belongs to the technical field of aviation electrical control, and in particular relates to a DC bus bar short-circuit protection device and method. Background technique [0002] For the short-circuit protection of the conventional helicopter DC bus bar, a short-circuit protection device such as a fuse or a fuse is usually designed for protection. When the bus bar is short-circuited, the short-circuit protection device disconnects the circuit. The disadvantages of this design are as follows: the circuit cannot be actively restored, so that the power supply bus bar cannot be actively restored after power failure. Contents of the invention [0003] In view of the above problems, the present invention provides a DC bus bar short-circuit protection device and method, which uses electrical detection components to detect the bus bar operating current and operating voltage, judges it and then performs automatic short-circuit protection control...

Claims

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Application Information

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IPC IPC(8): H02H7/22H02J1/00
CPCH02H7/22H02J1/00
Inventor 王国法朱晨胡圣波孙明辉赖耀祖
Owner CHINA HELICOPTER RES & DEV INST
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