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A power supply protection device

A power supply protection and circuit technology, applied in the direction of emergency protection circuit devices, circuit devices, emergency protection devices with automatic disconnection, etc., can solve accidents, lack of compensation and protection means, protection component parameters and performance users cannot be informed in time, etc. Problems, to avoid secondary failures, high security effect

Active Publication Date: 2020-04-14
重庆国翰能源发展有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the promotion and use of power supply equipment, related accidents emerge in endlessly. The power supply equipment has overload protection and short circuit protection circuits. Although the circuit structure is various, it is usually simple in structure. When the value is high, it is protected, and it is only protected for the protected object, lacking compensation and protection means; when the parameter performance of the protection component itself changes due to the influence of the use environment and use time, the user cannot know in time. problems, it may cause accidents; in order to solve the above problems, it is necessary to conduct in-depth research

Method used

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  • A power supply protection device

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Embodiment Construction

[0014] The technical solutions in the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0015] A power supply protection device connected in series with the power supply; such as figure 1 As shown, it includes a first electric control switch J1S, a second electric control switch Q2, an electric control switch monitoring circuit, an overload current monitoring circuit, a trigger circuit, a logic conversion circuit and an alarm circuit; wherein, the overload current monitoring circuit includes a sampling resistor R1, The first differential amplifier circuit, the first comparison circuit (comprising comparator U4), the second comparison circuit (comprising comparator U2), the first voltage reference circuit; the first differential amplifier circuit comprises operational amplifier U1, resistor R2, resistor R3, resistor R4, and resistor R8; the resistor R2 is connected in series with the resistor R3 to the reference g...

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Abstract

The invention provides a power supply protection device, which is connected in series with a power supply source; the switch action ends of a first electric control switch and a second electric control switch are sequentially connected in series with a sampling resistor and are connected to the power supply source / a power supply end; the serially connected switch action ends of the first electriccontrol switch and the second electric control switch are integrally connected with the input end of an electric control switch monitoring circuit; the two ends of the sampling resistor is connected with the differential input end of a first differential amplification circuit; the output end of the first differential amplification circuit is respectively connected with the first input end of a first comparison circuit and the first input end of a second comparison circuit; the output ends of the first comparison circuit, the second comparison circuit and the electric control switch monitoringcircuit are connected with the triggering end or input end of a logic conversion circuit; the output end of the logic conversion circuit is connected with the triggering end of a triggering circuit and / or a warning circuit. Compared with the prior art, the power supply protection device has the advantages that the safety is higher; after the work switch fails, the secondary fault due to short circuit can be timely avoided.

Description

technical field [0001] The invention relates to the technical field of power supply, in particular to a power supply protection device. Background technique [0002] With the promotion and use of power supply equipment, related accidents emerge in endlessly. The power supply equipment has overload protection and short circuit protection circuits. Although the circuit structure is various, it is usually simple in structure. When the value is high, it is protected, and it is only protected for the protected object, lacking compensation and protection means; when the parameter performance of the protection component itself changes due to the influence of the use environment and use time, the user cannot know in time. If there are problems, it may cause accidents; in order to solve the above problems, it is necessary to conduct in-depth research. Contents of the invention [0003] Aiming at the deficiencies in the prior art, the invention provides a power supply protection de...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H3/08H02H3/04H02H3/05
CPCH02H3/044H02H3/05H02H3/08
Inventor 刘崇汉李杰
Owner 重庆国翰能源发展有限公司
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