Design of three phase high current generator based on virtual instrument technology

In order to meet the current requirement of low voltage apparatus protection function test, a design of three phase high current generator based on virtual instrument technology is proposed. The coarse-fine tuning voltage regulator with the compensation transformer structure is used in the main circuit of the current generator, which not only could extend the range of current regulation, improve current regulation accuracy. The control program developed by LabVIEW virtual instrument technology is used to achieve the automatic adjustment, acquisition and calculation of the output current. Finally, the practical application shows that the three phase high current generator could output high-precision current signal, and has the advantages of strong anti-interference ability and high automation degree.