Analyzing of PI controlled DC/DC converter output voltage using labview

Abstract

In this study, feedback control is carried out for DC/DC buck converter by using PI controller. The output voltage signal of the converter is shown on the screen of the computer by using. LabVIEW program. There are RS22 connector, microcontroller (PIC16F877) and two buck converter on the board. The needed switching signals to run the system are produced by means of microcontroller. The output voltage signals of the converter are transferred to the screen of the computer over DAQ used with LabVIEW. This data is recorded can also be recorded as Excel file. The graphics can be drawn as regard to wanted parameters. The output voltage can be tuned according to increase or decrease at the output voltage of the converter by changing the rate of on-off time of the switching signal. PI controller is used to not be effected from the load changing of the output voltage of the converter. The fourier analysis of the output voltage of the converter can be tracked by LabVIEW program as on-line or off-line.