Title :
Simulation and modeling of a DC-DC converter controlled by an 8-bit microcontroller
Author :
Boudreaux, R.R. ; Nelms, R.M. ; Hung, John Y.
Author_Institution :
Dept. of Electr. Eng., Auburn Univ., AL, USA
Abstract :
Traditionally, analog control technologies have been employed to regulate the output voltage of DC-DC converters. The utilization of digital control techniques for this regulation function is currently under consideration. Critical issues in a digital control implementation include analog-to-digital conversion range, resolution and delay, calculation time, and numerical precision. Results from an investigation into the modeling and simulation of DC-DC converters controlled by an 8-bit microcontroller are described in this paper. Many of these critical issues have been modeled using MatlabTM and Simulink TM from The Mathworks Inc. Simulation results from this model are compared to experimental waveforms obtained from a buck converter controlled by a Microchip PIC16C74 8-bit microcontroller. Experimental results agree well with the simulation model. The buck converter is represented by its state-space averaged model in the simulation
Keywords :
DC-DC power convertors; digital control; microcontrollers; state-space methods; voltage control; 8-bit microcontroller; DC-DC converter control; Matlab; Microchip PIC16C74 8-bit microcontroller; Simulink; analog-to-digital conversion; buck converter; digital control; modeling; output voltage regulation; simulation; state-space averaged model; Circuit testing; DC-DC power converters; Difference equations; Frequency conversion; Integral equations; Microcontrollers; Pulse width modulation; Three-term control; Transfer functions; Voltage;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 1997. APEC '97 Conference Proceedings 1997., Twelfth Annual
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-3704-2
DOI :
10.1109/APEC.1997.575764
