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Electronic overcurrent protection device using microcontroller for control

An overcurrent protection, microcontroller technology, applied in the direction of protection that reacts to overcurrent, can solve problems such as fast and effective protection of unfavorable electronic devices and loads, slow action speed, etc., to achieve fast action time, avoid current Impact, the effect of simple circuit structure

Inactive Publication Date: 2006-02-22
兰州大成科技股份有限公司 +1
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Problems solved by technology

[0002] Electronic overcurrent protection devices widely used at present mainly use circuit breakers to realize the protection of electronic control devices and loads. The parameters of the overcurrent protection device are set by the circuit device parameters and are only applicable to specific circuit systems

Method used

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  • Electronic overcurrent protection device using microcontroller for control

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Embodiment Construction

[0018] An electronic overcurrent protection device is a closed-loop control loop composed of a current sensor 1, a microcontroller 3 with a programming function, a comparator 2 and an AC electronic switch assembly 4; the output terminal of the above-mentioned current sensor 1 is connected to the Comparator 2 is connected; the input of comparator 2 is set to the standard voltage. Microcontroller 3 responds to the signal output by comparator 2 and controls electronic switching device 4 to realize the overcurrent protection to switch 4 and load 5 (refer to figure 1 ). When the output signal of the sensor 1 is greater than the reference voltage, the forced interrupt source level is output to the microcontroller 3, and the microcontroller 3 responds immediately, quickly and forcibly closes the control loop switch, cuts off the control loop output, and protects the control switch and the load. The start current overcurrent protection action time and delay recovery time are set in t...

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Abstract

The invention provides a intelligent over-current protective device which is controlled by microcontroller MCU with the function of programming and controlling, comprising a current sensor, a microcontroller and a closed-loop controlling circuit formed by electron switch components. The invention has sensitive reaction and short operating time, which are favorable to the fast protection for electron controlling device and load. The invention can set over-current protection time of staring current in the MCU program according to different resistance, load, power and current, to avoid mistake protection and the attack of current when starting while making the system automatically recover to normal operation condition when the over current disappear; said invention has simple structure of circuit and it can meet the demands of variable loads to apply the protection and controlling of any electrical apparatus.

Description

technical field [0001] The invention relates to the field of electrical automation control, in particular to an intelligent electronic overcurrent protection device controlled by a microcontroller, which is mainly used for overcurrent protection of electronic control devices, transmission lines and loads. Background technique [0002] Electronic overcurrent protection devices widely used at present mainly use circuit breakers to realize the protection of electronic control devices and loads. The parameters of the overcurrent protection device are set by the circuit device parameters and are only applicable to specific circuit systems. Contents of the invention [0003] The object of the present invention is to provide a reliable and safe electronic overcurrent protection device controlled by a micro-controller, capable of adjusting control parameters, short in action time. [0004] The object of the present invention can be achieved by the following measures: [0005] An...

Claims

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Application Information

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IPC IPC(8): H02H3/08
Inventor 范多旺魏宗寿方亚非旷文珍何涛陈光武魏文军王增力牛宏侠
Owner 兰州大成科技股份有限公司
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