Intelligent Monitoring and Overheating Protection System for Motor

To reduce the damage number and equipment the failure rate of motor, improve the reliability of motor operation, an intelligent motors monitoring protection system has been developed. C8051F020 single chip used to collect reliable electric current and temperature parameters, current of motor overload, overrun, leakage, unbalanced, and none of the electrical and environmental temperature for three-phase were measured and calculated, intelligent determine a variety of work the possibility of failure and timely rule out, implementation of lack phase, over-current, under current, under voltage protection for the motor. Software is utilizing differential filtering to improve full wave Fourier algorithm and effectively restraining decaying DC component. Thermal model of low voltage motor is also established and it has solved the overheating protection problem of low voltage motor on principle, and thus simplified the hardware design. Practical operation demonstrated that the system is stable and reliable work, easy to operate and function to meet the requirements of the scene.