Research On Performance Monitoring Technology And Accelerated Degradation Test Method Of Intelligent Motor Protector

The performance of the intelligent motor protector will be degraded in the working process,which will affect the reliability of the protection of motor,and contains a large number of reliable,accurate and useful key information related to the health status of the product.Therefore,the intelligent motor protector for performance monitoring and accelerated degradation test,to explore the law of the change of degradation sensitive parameters,and inform of the health status of intelligent motor protector,as a result,to provide help for product design,performance improvement and timely replacement.Firstly,the design of performance monitoring system of the intelligent motor protector was completed.In this paper,a typical intelligent motor protector was used as the research object,and selected the output voltage of power module,the power current of micro-controller chip module,the contact resistance of execution module,the voltage of transformer module and the voltage of signal processing module of intelligent motor protector as degradation of sensitive parameters.The hardware system of the performance monitoring device was designed with the MCU as the core,and the software system is completed by using C language,which realized the real-time monitoring of the performance of the intelligent motor protector.Secondly,according to the environmental test standard of electrical and electronic products and the accelerated degradation test method,the thermal cycling accelerated degradation test scheme of the intelligent motor protector was developed.At the same time,the acceleration stress level,the exposure time,the rate of temperature rise and fall,and the number of test cycles were set.At last,the accelerated degradation test platform of intelligent motor protector was built,and then carried out the degradation test of intelligent motor protector,obtained the performance degradation data,and analyzed the test results,obtained the degradation trajectory,which provide basis to the performance analysis of intelligent motor protector.