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Motor, a fundamental factor of industry, is very important to make the operation of factories normal. At every stage of maintenance, motor must be tested from various aspects in order to get the physical parameters. There are lots of defects of the motor testing system based on the traditional development platform, such as a long development cycle, a low degree of automation, compatibility and scalability, and a high cost. So, it is very necessary to build the motor testing system which is convenient, effective, compatible and friendly.LabVIEW, a virtual instrument software, which is powerful, low-cost and flexible, is developed by National Instruments Co. Ltd. for complex automated test and control. LabVIEW has unique advantages in the field of motor testing.In this paper, first, the current situation and the trends of the motor testing system and the concept and the applications of virtual instrument technology were introduced briefly. Second, a new method, combining the virtual instrument technology and the network technology, was proposed to build a new motor testing system. Third, the hardware architecture and the device selection of the system were introduced, meanwhile, the single-line diagrams of PLC of the system were drew, and the input and output of PLC were set. Forth, the software on main server based on LabVIEW was developed, whose main functions were database management for this system, including reading and writing various work data and records of fault and alarm, searching and network managing. Fifth, the software on communication server based on LabVIEW was developed, whose main functions were receiving, translating and issuing the commands from work stations, monitoring the status of PLC, receiving, analyzing, processing and transporting the data from electrical devices. Finally, the software on work stations based on LabVIEW was developed, whose main functions were remotely controlling the various devices, data acquisition and faults alarm. Until now, the system has been operating stably almost one year and an half at the motor testing and repairing center of BAOSteel GROUP. Practical application demonstrates that the system make the productivity increased, interface friendly, the test environment of workers there better.
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