Output short circuit protection device for direct-current power supply

A DC power supply and protection device technology, applied in circuit devices, emergency protection circuit devices, automatic disconnection emergency protection devices, etc., can solve problems such as causing accidents, damage to power supplies and electrical appliances, etc. , the effect of fast cutting speed

Active Publication Date: 2014-01-01
来宾市计量测试研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] When people use an external DC power supply, they are often short-circuited, causing damage to the power supply and electrical appliances, and even causing accidents.

Method used

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  • Output short circuit protection device for direct-current power supply
  • Output short circuit protection device for direct-current power supply
  • Output short circuit protection device for direct-current power supply

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] DC power output short-circuit protection device, characterized in that, such as figure 1 , figure 2 , image 3 Shown: It consists of a relay circuit, a start and hold circuit, and an insurance resistor. According to the voltage and power requirements, select the relay J1, JK1 is the normally open contact switch of the relay J1, Q1 is the NPN transistor, C1-2 is the electrolytic capacitor, the light-emitting diode TD1 is used as the indicator light, VD1 is the regulator tube, and AN1 is the start button , AN2 is the close button, R1-3 is the resistor, the resistor R1 is selected according to the power requirement, and the value is 0.1-4Ω, which will not affect the working performance of the electrical appliance. image 3 for figure 2 Simplify the circuit diagram, the circuit is more concise.

[0013] After the DC power supply is powered on, turn on the device, press the start button AN1, the DC power supply passes through the resistor R1, the diode D1, the start bu...

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PUM

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Abstract

An output short circuit protection device for a direct-current power supply is composed of a relay circuit, a startup retaining circuit and an insurance resistor. The output short circuit protection device is arranged behind the direct-current power supply to prevent output short circuit of the direct-current power supply or protect the direct-current power supply when an electrical appliance is in short circuit. Thus, accidents caused by short circuit are avoided, the cut-off speed is high, and the effects of rear end short circuit on a preceding stage power supply are effectively prevented. After short circuit is removed, output is started and switched on again. Furthermore, when the output is access to the direct-current power supply and a positive electrode and a negative electrode are reversely connected, the output cannot be started and switched on. The output short circuit protection device is simple in circuit, safe, reliable, convenient and practical.

Description

Technical field: [0001] The invention relates to the field of electronic control, and relates to a protection circuit for short circuit when a DC power supply is output. Background technique: [0002] When people use an external DC power supply, they are often short-circuited, causing damage to the power supply and electrical appliances, and even causing accidents. Invention content: [0003] The object of the present invention is to aim at that when people use an external DC power supply appliance, the DC power supply is often damaged due to a short circuit. Therefore, a short circuit protection device for the output of a DC power supply with a simple and reliable circuit is provided, which is placed at the output end of the DC power supply to prevent the DC power supply from When the output is short-circuited or the electrical appliance is short-circuited, it plays the role of protecting the DC power supply. [0004] The utility model relates to a DC power supply output...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H3/087H02H11/00
Inventor 兰如根
Owner 来宾市计量测试研究所
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