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Solid state power controller with current-limiting protection and inverse time-lag protection function

An inverse time protection, solid-state power technology, used in emergency protection circuit devices for limiting overcurrent/overvoltage, emergency protection circuit devices, automatic disconnection emergency protection devices, etc., can solve the problem of poor anti-electromagnetic interference performance, Low precision, poor flexibility and other problems, to achieve the effect of accurate protection, prevention of failure, and reduction of impact

Active Publication Date: 2017-11-03
CHINA AEROSPACE TIMES ELECTRONICS CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are problems of low precision, poor flexibility, and poor anti-electromagnetic interference performance

Method used

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  • Solid state power controller with current-limiting protection and inverse time-lag protection function
  • Solid state power controller with current-limiting protection and inverse time-lag protection function
  • Solid state power controller with current-limiting protection and inverse time-lag protection function

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Experimental program
Comparison scheme
Effect test

Embodiment

[0060] The relevant parameter information is shown in Table 1.

[0061] Table 1 Instance parameter list

[0062]

[0063]

[0064] When the load current is overcurrent, such as I load is 20A, when I 2 T inverse time curve tripping time is

[0065]

[0066] When the load current is overcurrent, such as I load is 30A, at this time I 2 T inverse time curve tripping time is

[0067]

[0068] When the load current is overcurrent, such as I load When it is 40A, it reaches the current limiting protection threshold, and the tripping time of the current limiting curve is

[0069]

[0070] It can be seen that when current limiting protection is performed, the trip protection time is much shorter than I 2 Time required for T protection. This not only reduces the impact of high current on the subsequent load, but also avoids the reduction of the output voltage caused by the excessive output current of the power supply.

[0071] During the actual use of the solid-st...

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Abstract

A solid state power controller with a current-limiting protection and inverse time-lag protection function comprises an oscillation starting circuit, a rectifying circuit, a signal isolation circuit, a drive circuit, a protection control circuit, a protection execution circuit, a switch circuit and a transformer. According to the solid state power controller disclosed by the invention, the continuous increase of abnormality can be suppressed while the over-current protection is carried out, the impact of abnormal current on the post load of a power distribution system can be effectively reduced, and meanwhile, the risk of damages to the power supply and the post load caused by the uncontrolled current rise in a short-circuit protection process can also be reduced.

Description

technical field [0001] The invention relates to a solid-state power controller with functions of current limiting protection and inverse time-limit protection, belonging to the design field of solid-state power controllers. Background technique [0002] The solid-state power controller is a switch controller that uses solid-state switches—MOSFET on-off to realize the functions of relays and overload protectors in traditional power distribution units. Based on the "thermal memory" theory of the bus cable, the solid-state power controller collects current data from the circuit load, calculates the temperature of the load bus cable, and performs corresponding delay shutdown on the load according to the detected current value in the case of bus overcurrent. break, to avoid load damage due to over-current, to achieve load protection. [0003] At present, the load protection method of solid-state power controllers mostly adopts inverse time protection. The existing technology is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H9/02H02H3/087H02H3/02
CPCH02H3/025H02H3/087H02H9/025
Inventor 杨帆南非云建军张靖娴徐璐唐侃
Owner CHINA AEROSPACE TIMES ELECTRONICS CORP
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