| As VVVF(Variable Voltage and Variable Frequency)technology is extensively used in kinds of velocity modulation transmission devices, DC speeder will certainly be replaced by frequency conversion speeder. The demanding for inverter is becoming more and more such that many famous companies (such as ABB, Siemens, Schneider) are working on producing the high-quality inverter. As a key part of the inverter production, the inverter test system has a good application potential. Therefore, the research on inverter test system has great application value. The traditional inverter test system has many weaknesses, for example, huge bulk, complicated structure, lower efficiency et al. Although a lot of attention has been paid to the research and development of inverter test system using some new technology, the successful instance is rare. According to the requirements of customer, this project is to design inverter test system using virtual instrument.Our inverter test system is composed of two parts: hardware and software system. We first introduce the hardware structure design, including the design of source power, IPC (Industrial Personal Computer), instrument and meter library, loaded part. We emphasize on the design and application of the virtual instrument software. Moreover, we give detailed description of important tests, and present the corresponding implementation flow chart. According to the requirements of customer, we present four layer logic architecture of virtual instrument in the software design, which greatly strengthens the universal use of the software. It also greatly reduces software's dependence on hardware environment and application objects. For the difficult problems encountered in the developing, we give detailed feasible solutions. The project passed the customer test in January 2008, and has already been used in application. The result of the application shows that the system has higher efficiency, better stability and more reliable security. |
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