Research On Asynchronous Motor Automatic Testing System

With the continuous development of national economy and technology,motor has been used more and more widely, which has been put into use from industrial and agricultural production areas to daily life. After the repairing work of motor, it should be tested, and the results of testing are significant in judging motor quality, improving motor working reliability and extending motor service life. This presents higher requirement for motor testing technology.This thesis introduces a king of asynchronous motor automatic test system designed for asynchronous motor. The system adopts ordinary computer as upper computer (equipped with Step7, Starter and WinCC software), which can monitor the whole testing process. Lower computer adopts Siemens S7-300 series PLC, which can realize the control of actuator elements, the test process completed automatically. The system adopts Siemens Sinamics S120 variable frequency drive device and asynchronous motor constituting of AC asynchronous electric dynamometer, and S120 frequency converter can precisely control the output torque of load motor, which provides load for measured motor.In this thesis, firstly it introduces the knowledge of motor test technology, according to this technology the main content of this thesis would be brought up. Secondly, it introduces the hardware and software composition, and the function of every part, through the hardware equipment to finish the test process control and data measurement and through the test software to realize the testing process control algorithm and test data processing. Thirdly, according to the motor testing standards it introduces several typical motor test testing methods and data processing model. Finally, it gives some advice about further improvements of the system, and makes prospect on the development of motor automatic test system.