Overvoltage and under-voltage detection circuit applied to solar energy storage power supply

A technology for overvoltage and undervoltage detection circuits, which is applied in power supply testing, circuit devices, emergency protection circuit devices, etc., can solve the problems of many circuit components, complex structure, reliability and service life, etc., to ensure power supply safe effect

Inactive Publication Date: 2017-10-24
HEFEI SHANGSHUO NEW ENERGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the commonly used voltage detection circuits are mostly analog circuits, which consist o...

Method used

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  • Overvoltage and under-voltage detection circuit applied to solar energy storage power supply

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Embodiment Construction

[0016] refer to figure 1 , an overvoltage and undervoltage detection circuit applied to solar energy storage power supplies proposed by the present invention, including: power supply input terminal Vin, power supply output terminal Vout, first comparator OP1, second comparator OP2, logic AND gate LA1 , N-type transistor Q1, P-channel transistor Q2 and light emitting diode D1.

[0017] The first input terminal of the first comparator OP1 is connected to the overvoltage reference value RF1, and its second input terminal is connected to the power input terminal Vin; when the voltage value of the second input terminal is less than the voltage value of the first input terminal, the first comparator OP1 Output high level, otherwise, output low level. In this embodiment, the first comparator OP1 takes the overvoltage reference value RF1 as the judgment standard. When the power supply voltage is too large, the first comparator OP1 outputs a low level 0; if the power supply voltage is...

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Abstract

The invention discloses an overvoltage and undervoltage detection circuit applied to a solar energy storage power supply. The first comparator performs overvoltage detection on the power supply voltage, and the second comparator performs undervoltage detection on the power supply voltage. The output end of the logic AND gate is connected to the base of the triode, so that the triode can be turned on only when the logic AND gate outputs a high level. And the logic AND gate can output high level only when the voltage is normal, that is, both the first comparator and the second comparator output high level 1. Thus, in the present invention, through the first comparator, the second comparator and the logical AND gate, the triode is turned on when the power supply voltage is normal; and the triode is turned off when the power supply voltage is overvoltage or undervoltage. However, through the on-off of the triode, the power supply output of the power input terminal can be controlled, and the work of the light-emitting diode can be controlled.

Description

technical field [0001] The invention relates to the technical field of voltage detection, in particular to an overvoltage and undervoltage detection circuit applied to a solar energy storage power supply. Background technique [0002] In the solar power supply circuit, since the solar energy changes in real time, it is difficult to ensure the voltage stability of the storage power source charged by the solar energy. If the power supply voltage is overvoltage, it is easy to damage the circuit components and loads, which is very dangerous; if the power supply voltage is undervoltage, it is difficult to ensure the normal operation of the circuit. Therefore, detecting the power supply voltage is an indispensable unit in the power supply circuit. [0003] At present, most commonly used voltage detection circuits are analog circuits, which consist of many circuit components and complex structures, and the reliability and service life are difficult to guarantee. Contents of the ...

Claims

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Application Information

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IPC IPC(8): H02H3/24H02H3/08H02H3/04G01R31/40
CPCH02H3/24G01R31/40H02H3/04H02H3/08
Inventor 杨益金汪庆运
Owner HEFEI SHANGSHUO NEW ENERGY
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