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针对煤矿井下高压鼠笼式交流异步电机串电抗器降压起动时,由继电器控制的电抗器线路复杂、操作麻烦、不利于维护和更新的缺点,提出一种基于PIC16F887单片机的智能防爆电磁式起动电抗器的设计。该电抗器具有电流型、时间型、时间和电流型3种起动模式,起动电流和起动时间可以整定,起动过程中具有温升检测保护功能,起动完成后旁路电气闭锁功能,并对电压、电流、温度等信号进行实时监控,一旦有超限信号,可以自动切断主电源,实现了智能化。设计的电抗器已通过试验,并在某煤矿井下额定电压10 kV、额定功率1 600 kW的风机试运行,起动过程控制电流平稳,起动性能可靠,操作方便,智能化程度高。
Aiming at the shortcomings of low voltage squirrel-cage AC induction motor string reactors in underground coal mines, the reactor controlled by the relay is complicated and the operation is troublesome, which is not conducive to the maintenance and updating. Based on the PIC16F887 microcontroller intelligent explosion-proof electromagnetic starter Reactor design. The reactor has three kinds of starting modes: current type, time type, time and current type. The starting current and starting time can be set and the temperature rise detection and protection function can be set during starting. After the starting, the bypass electrical blocking function is completed and the voltage, Current, temperature and other signals for real-time monitoring, once there is overrun signal, you can automatically cut off the main power supply to achieve the intelligence. The designed reactor has passed the test and has been put into trial operation in a coal mine fan rated voltage of 10 kV and rated power of 1 600 kW. The starter current has steady control current, reliable starting performance, convenient operation and high intelligence.