The Rtunit rapid prototyping development system is used to quickly develop and control the induction motor current source excitation system. The modeling and simulation of the three-phase programmable current source system is completed in MATLAB/Simulink. The supporting components is used and converted into engineering code which can be downloaded to the hardware controller. The three-phase full-bridge inverter is controlled through the integrated development environment online detection and modification of corresponding parameters. The development of the three-phase current source excitation system is completed. The system can stably output three-phase current source excitation with real-time frequency modulation and amplitude modulation. The test results show that this method has the advantages of simple programming, short development cycle, low cost and high efficiency under the condition of meeting the requirements.