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Over-current protection system for satellite load input terminal

An overcurrent protection and overcurrent protection circuit technology, applied in the field of satellite load input overcurrent protection systems, can solve the problems of low reliability and uncontrollable overcurrent peak current, and achieve the effect of ensuring the safety of the whole satellite

Inactive Publication Date: 2018-04-24
SHANGHAI INST OF SPACE POWER SOURCES
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to provide a satellite load input terminal overcurrent protection system, which can solve the problems of uncontrollable overcurrent peak current and low reliability when fuses are used as overcurrent protection

Method used

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  • Over-current protection system for satellite load input terminal
  • Over-current protection system for satellite load input terminal
  • Over-current protection system for satellite load input terminal

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Embodiment Construction

[0044] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0045] Such as figure 1 As shown, the present invention provides a satellite load input overcurrent protection system, including:

[0046] The satellite load input terminal overcurrent protection circuit is used to detect that the input current of the load terminal exceeds the limit value when a short circuit or overcurrent fault occurs at the satellite load terminal, cut off the current output, and then restore the current output with a delay. After repeated preset times, If the input current at the load end still exceeds the limit value, the current output will be permanently cut off (recovery can be commanded).

[0047] The satellite load input terminal overcurrent protection circuit according to an embodiment of the present i...

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Abstract

The invention provides an over-current protection system for satellite load input terminal. The system includes an over-current protection circuit connected with the satellite load input terminal andused for cutting off current output and then performing delayed restoration of current output if detecting the input current of the load terminal surpasses a predetermined value when the satellite load terminal meets faults including short circuit, over-current or the like, and cutting off current output permanently if the input current of the load terminal still surpasses the predetermined valueif the above process is repeated for a preset number of times. According to the invention, the current does not surpasses the predetermined value when short circuit occurs at the load terminal and interference to a bus is avoided and the integral satellite safety is not affected; bus stability can be ensured when a load meets short circuit, over-current or the like and no interference is generatedto other electricity using loads and the integral satellite safety is ensured. The system provided by the invention has a function of soft starting. Besides, current input can be restored through commands. According to the invention, soft starting and over-current protection are integrated together, power devices are not increased and only a part of control circuits is added.

Description

technical field [0001] The invention relates to a satellite load input terminal overcurrent protection system. Background technique [0002] When the satellite is in orbit, there are multiple electrical loads, which are in parallel with each other. When a short circuit or overcurrent fault occurs, the bus voltage will be too low, which will affect the stability of other electrical loads and cause other loads to fail. cause the entire star to fail. [0003] Traditional satellite load input overcurrent protection generally uses fuses, and there are two disadvantages of using fuses as overcurrent protection: [0004] 1) The overcurrent peak current is uncontrollable, and the fuse blown is affected by I 2 t control, if the load is short-circuited, the peak current is mainly limited by the cable impedance. If the cable impedance is small, the peak current can reach hundreds of amperes, which will greatly disturb the busbar and cause other electrical loads to be under-voltage ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H3/08H02H3/07
CPCH02H3/08H02H3/07
Inventor 杨华韦云程新薛鸿翔张宸刘赫名俞伟罗霄
Owner SHANGHAI INST OF SPACE POWER SOURCES
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