Design of analog three-phase AC signal source based on Proteus

LV Shudong
(Department of Experiment Teaching, Yancheng Institute of Technology, Yancheng 224051, China)

Abstract: To synthesize threephase lowfrequency sinewave signal with high performance and reduce the research costs,a design method of powerfrequency threephase AC signal source based on operational amplifiers and resistors and capacitors was proposed. Composed of the circuit of sinewave generator, voltage amplitude regulating, phaseshifting, output and voltagecurrent converting, the symmetrical threephase voltage and threephase current could be synchroregulated exactly in the range of 0~1 V and 0~5 mA. The simulation results of threephase AC voltage source and current source with symmetrical resistor load starconnected in Proteus show that the performance indicators of the circuit meet the design requirements, the circuit has the advantages of low cost, high accuracy, stable performance, without distortion of the output wave, and can be applied to automatic control system and instrument test system.
Key words: powerfrequency; threephase AC power; symmetrical; Proteus