The Study Of Automatic Motor Testing System Based On The Virtual Instrument

This paper presents an automatic test system of induction motor based on virtual instrument. The system uses the graphical programming language, Lab VIEW, as the software platform, and is based on general hardware of virtual instrument. The host computer and the PLC control motor's speed, and are mainly responsible for achieving the relay control and logic operations for the testing process; through the data acquisition card, the data collection obtains data signals from a variety of measuring instruments, and PC executes the processing and handling of the collected data.The AC dynamometer system is composed of the inverter and squirrel-cage induction motor. The applications of the AC dynamometer and the software platform of virtual instrument, high functional, flexible, relatively simple motor test system can be developed efficiently, and implement the motor of the automatic measurement. The test system contains most functions and pilot projects of type tests, providing user with a variety of options for self-custom test. The system's human-machine interface is intuitive and easy to operate, and its software is flexible, easy for the secondary development. It is applicable to automatic tests for the ordinary three-phase asynchronous motor, and the variable-frequency motor can also be tested in this system.This article introduces the background of the research, compares common methods designed for the system structure, and determines the composition. For the components of the system's hardware and the working principle of the various parts of the device, there is a detailed description and analysis. With the state standards, the typical projects are described. According to modular programming ideas, the realization and software design of test pilots has been done a detailed analysis. Some of the special methods for the variable-frequency motor test are briefly introduced and analyzed, and the design of the system has a further improved. At last, the paper concludes problems and suggests possible improvements in methods.