电机综合保护器设计

bnormal operation of the motor will affect the continuity of the production process, resulting in huge losses. Therefore, to ensure the normal operation of the motor is very important. When the motor fails, integrated protection devices achieve the purposes that protect motor in a timely, reliable action.In this paper, intelligent protection technologies were studied. In theory the motor protection theory, which three-phase asynchronous motor against overload, phase failure, overvoltage, undervoltage, and other characteristics of failure and so on, through an integrated approach to achieve protection of MCU by analog, digital and combines. Protection principle of three-phase asynchronous motor is designed to at89s52 MCU core .It relays hardware and software systems to achieve real-time monitoring of the motor failure and effective protection.