很多电子设备都有个额定电流,不允许超过额定电流,不然会烧坏设备。所以有些设备就做了电流保护模块。当电流超过设定电流时候,设备自动断电,以保护设备。如主板usb一般有usb过流保护,保护主板不被烧坏。
IGBT的驱动和过流保护电路的研究 -文本浏览模式- 文档 - 枢研网 关键词: IGBT; 驱动电路; 过流保护 [gap=393]Key words: IGBT; Driving Circuit; Over-current protection
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... 过/欠频保护 (OF/UF protection) 过流保护 (OC protection) 过载保护 (OL protection) ...
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过流保护测试 Over current protection test ; OLP test
过流保护回路 Over-current protective circuit
过流保护电路 current foldback circuit ; over-current protection circuit
输入过流保护 Input over-current protection
异常过流保护 AOCP
方向过流保护 Directional over-current protection
一种过流保护电路 CURRENT LIMITING
过压、过流保护 Over Voltage, over current protectionAuto-recovery
And current detecting is the key of over-current protection.
而电流检测又是过流保护的重中之重。
参考来源 - BUCK型DCInverse-time overcurrent protection is used in power supply installation to fit the heat characteristic of the device’s fault current.
将反时限过流保护的概念引入智能电源系统,参考国际通用反时限控制曲线,通过构造器件的热库模型采用微处理器程控能够方便实现各种反时限控制特性。
参考来源 - 交直流开关电源数控系统设计及关键问题研究Inverse-time overcurrent relays are often used abroad. With faults near the power sources, the operation time for backup protection may be much shorter than that of 3-zone current protection.
国外目前很多采用反时限过流保护,其优点就是在靠近电源侧输电线路故障时,就后备保护而言,动作时间较三段过流保护明显缩短。
参考来源 - 输电系统反时限过流保护动作特性的协调优化Over-current protection circuit of IGBT was designed based on the principles of slow decrease of the gate voltage and soft switching over-current protection. When over current occurs, the gate voltage is decreased slowly immediately.
基于软降栅压及软关断过流保护原理设计了IGBT过流保护电路,该电路在出现过流时,立即缓降栅压,利用IGBT承受短路电流时间延长这个阶段,判别真假故障电流,决定是否进行信号封锁。
参考来源 - 波控逆变CO·2,447,543篇论文数据,部分数据来源于NoteExpress
压缩机过流保护,流量报警,超温报警。
Overcurrent protection for compressor, flow alarm, over temperature alarm.
过充保护,过放保护,过流保护,短路保护。
Overcharge protection, over-discharge protection, over current, short circuit protection.
一个简单的电路断路器提供精密过压和过流保护。
A simple circuit breaker delivers precision overvoltage protection and overcurrent protection.
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