CN1738125A - Electronic overcurrent protection device controlled by microcontroller - Google Patents
Electronic overcurrent protection device controlled by microcontroller Download PDFInfo
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- CN1738125A CN1738125A CN 200410076777 CN200410076777A CN1738125A CN 1738125 A CN1738125 A CN 1738125A CN 200410076777 CN200410076777 CN 200410076777 CN 200410076777 A CN200410076777 A CN 200410076777A CN 1738125 A CN1738125 A CN 1738125A
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Abstract
本发明提供了一种采用具有编程控制功能的微控制器MCU控制的智能型电子过流保护装置，是由电流传感器、微控制器及电子开关组件组成的闭环控制回路，其反应灵敏、动作时间快，有利于对电子控制器件及负载的快速保护。本发明可根据不同的阻抗负载特性、功率及电流特性在MCU软件编程中设定启动电流过流保护动作时间和延时恢复时间，避免了启动瞬间电流冲击和开机误保护，同时使系统在过流消失后自动恢复正常工作状态；本发明电路结构简单，并能适应各种不同负载的要求，可广泛应用于各种电气设备的保护和控制。
The invention provides an intelligent electronic overcurrent protection device controlled by a microcontroller MCU with a programming control function. It is a closed-loop control loop composed of a current sensor, a microcontroller and an electronic switch assembly. Fast, conducive to the rapid protection of electronic control devices and loads. The invention can set the starting current overcurrent protection action time and delay recovery time in the MCU software programming according to different impedance load characteristics, power and current characteristics, avoiding the instantaneous current impact at startup and false protection at startup, and at the same time making the system After the current disappears, it automatically returns to the normal working state; the circuit structure of the invention is simple, and can adapt to the requirements of various loads, and can be widely used in the protection and control of various electrical equipment.
Description
Technical field
The present invention relates to electric automatization control field, relate in particular to a kind of intelligent electronic overcurrent protective device that adopts microprocessor controls, be mainly used in the overcurrent protection of electronic control device, transmission line and load.
Background technology
The electronic overcurrent protection device of extensive use at present mainly is that the employing circuit breaker is realized the protection to electronic control device and load, and its responsiveness is comparatively slow, is unfavorable for the protection fast and effectively to electronic device and load; And the parameter of existing electronic overcurrent protection device is the circuit devcie parameter setting, is only applicable to specific Circuits System.
Summary of the invention
The purpose of this invention is to provide and a kind ofly adopt microprocessor controls, and can adjust short, the reliable and secure electronic overcurrent protection device of Control Parameter, operate time.
Purpose of the present invention can realize by following measure:
A kind of electronic overcurrent protection device, the close loop control circuit of forming by current sensor, comparator, microcontroller and electronic switching device with programing function; The output level of described current sensor compares by comparator and normal voltage, and microcontroller rings the signal of comparator output and also controls electronic switching device realization overcurrent protection.
Set starting current overcurrent protection operate time in the software programming of described microcontroller.
Set the delay recovery time in the software programming of described microcontroller.
Described electronic switching device is the electronic AC switch device.
The output of described current sensor is connected with comparator by rectifier bridge.
Operation principle of the present invention: the close loop control circuit that the present invention is made up of current sensor, microcontroller and electronic power switch assembly; the output level of current sensor compares by comparator and reference voltage; when signal of sensor during greater than reference voltage; output forced interruption source level is given microcontroller MCU; MCU makes an immediate response; positive closing control loop switch cuts off control loop output, protection control switch and load fast.MCU passes through the executing state of current sensor feedback monitoring control loop switch simultaneously, and picks up counting simultaneously, and the protection startup begins exploratory connection control loop switch after reaching setting-up time; if overcurrent disappears; system restoration work if overcurrent still exists, is then proceeded protection.
The present invention compared with prior art has the following advantages:
1, the present invention adopts the closed control circuit of microcontroller (MCU) control, is quick on the draw, operate time is fast, helps the quick protection to electronic control device and load.
2, the present invention can set starting current overcurrent protection operate time according to different impedance load characteristics, power and current characteristics in the MCU software programming, has avoided the startup immediate current to impact and the protection of start mistake.
3, the present invention can set the delay recovery time according to load characteristic in the MCU software programming, makes system recover normal operating conditions automatically after overcurrent disappears.
4, the present invention adopts MCU can judge different conditions such as various load startups, short circuit and work, and protects respectively.
5, circuit structure of the present invention is simple, and can adapt to various unequally loaded requirements, can be widely used in the protection and the control of various electric equipments.
Description of drawings
Fig. 1 is a control circuit structure chart of the present invention
Embodiment
A kind of electronic overcurrent protection device, the close loop control circuit of forming by current sensor 1, microcontroller 3, comparator 2 and electronic AC switch assembly 4 with programing function; The output of above-mentioned current sensor 1 is connected with comparator 2 by rectifier bridge 6; The input of comparator 2 is provided with normal voltage.The signal of microcontroller 3 response comparators 2 outputs is also controlled the overcurrent protection (with reference to Fig. 1) that electronic switching device 4 is realized switch 4 and load 5.When the output signal of transducer 1 during greater than reference voltage, output forced interruption source level is given microcontroller 3, and microcontroller 3 makes an immediate response, and positive closing control loop switch cuts off control loop output, protection control switch and load fast.Starting current overcurrent protection operate time and delay recovery time have been set in the software programming of microcontroller 3; Microcontroller 3 passes through the executing state of current sensor 1 feedback monitoring control loop switch simultaneously, and picks up counting simultaneously, and the protection startup begins exploratory connection control loop switch after reaching setting-up time; if overcurrent disappears; system restoration work if overcurrent still exists, is then proceeded protection.
Claims (5)
1, a kind of electronic overcurrent protection device, the close loop control circuit of forming by current sensor (1), comparator (2), microcontroller (3) and electronic switching device (4) with programing function; The output level of described current sensor (1) compares by comparator (2) and normal voltage, and the signal of microcontroller (3) response comparator (2) output is also controlled electronic switching device (4) and realized overcurrent protection.
2, electronic overcurrent protection device as claimed in claim 1 or 2 is characterized in that: set starting current overcurrent protection operate time in the software programming of described microcontroller (3).
3, electronic overcurrent protection device as claimed in claim 1 or 2 is characterized in that: set the delay recovery time in the software programming of described microcontroller (3).
4, electronic overcurrent protection device as claimed in claim 1 is characterized in that: described electronic switching device (4) is the electronic AC switch device.
5, electronic overcurrent protection device as claimed in claim 1 or 2 is characterized in that: the output of described current sensor (1) is connected with comparator (2) by rectifier bridge (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410076777 CN1738125A (en) | 2004-09-01 | 2004-09-01 | Electronic overcurrent protection device controlled by microcontroller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410076777 CN1738125A (en) | 2004-09-01 | 2004-09-01 | Electronic overcurrent protection device controlled by microcontroller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1738125A true CN1738125A (en) | 2006-02-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410076777 Pending CN1738125A (en) | 2004-09-01 | 2004-09-01 | Electronic overcurrent protection device controlled by microcontroller |
Country Status (1)
| Country | Link |
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| CN (1) | CN1738125A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009101463A1 (en) * | 2008-02-15 | 2009-08-20 | Abb Technology Ag | A standalone self-supplied numeric controlled relay |
| CN101231412B (en) * | 2007-01-26 | 2011-12-07 | 群康科技(深圳)有限公司 | Backlight tube open circuit and short-circuit protection circuit |
| CN103515922A (en) * | 2012-06-25 | 2014-01-15 | 中国人民解放军理工大学 | Self-recovery and overcurrent protection circuit for power amplifier integrated circuit |
| CN104218554A (en) * | 2013-05-31 | 2014-12-17 | 空中客车运营简化股份公司 | Electrical protection using a semiconductor switch |
| CN107257193A (en) * | 2017-07-19 | 2017-10-17 | 深圳市华星光电半导体显示技术有限公司 | A kind of current foldback circuit and liquid crystal display |
| CN107360074A (en) * | 2017-09-01 | 2017-11-17 | 上海观谷科技有限公司 | Multichannel ejection control device and multichannel ejection control system |
-
2004
- 2004-09-01 CN CN 200410076777 patent/CN1738125A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101231412B (en) * | 2007-01-26 | 2011-12-07 | 群康科技(深圳)有限公司 | Backlight tube open circuit and short-circuit protection circuit |
| WO2009101463A1 (en) * | 2008-02-15 | 2009-08-20 | Abb Technology Ag | A standalone self-supplied numeric controlled relay |
| CN102124620A (en) * | 2008-02-15 | 2011-07-13 | Abb技术有限公司 | Independent self-powered digital control relay |
| US8502688B2 (en) | 2008-02-15 | 2013-08-06 | Abb Technology Ltd | Standalone self-supplied numeric controlled relay |
| CN102124620B (en) * | 2008-02-15 | 2014-05-07 | Abb技术有限公司 | How to configure an independent self-powered digital control relay |
| CN103515922A (en) * | 2012-06-25 | 2014-01-15 | 中国人民解放军理工大学 | Self-recovery and overcurrent protection circuit for power amplifier integrated circuit |
| CN104218554A (en) * | 2013-05-31 | 2014-12-17 | 空中客车运营简化股份公司 | Electrical protection using a semiconductor switch |
| CN104218554B (en) * | 2013-05-31 | 2018-08-28 | 空中客车运营简化股份公司 | Use the electic protection of semiconductor switch |
| CN107257193A (en) * | 2017-07-19 | 2017-10-17 | 深圳市华星光电半导体显示技术有限公司 | A kind of current foldback circuit and liquid crystal display |
| CN107257193B (en) * | 2017-07-19 | 2019-05-03 | 深圳市华星光电半导体显示技术有限公司 | A kind of current foldback circuit and liquid crystal display |
| CN107360074A (en) * | 2017-09-01 | 2017-11-17 | 上海观谷科技有限公司 | Multichannel ejection control device and multichannel ejection control system |
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