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All Journal International Journal of Electrical and Computer Engineering International Journal of Power Electronics and Drive Systems (IJPEDS)
Fredy E. Hoyos
Universidad Nacional de Colombia
Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering

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PID controller using rapid control prototyping techniques Odair A. Trujillo; Nicolás Toro-García; Fredy E. Hoyos
International Journal of Electrical and Computer Engineering (IJECE) Vol 9, No 3: June 2019
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (340.85 KB) | DOI: 10.11591/ijece.v9i3.pp1645-1655

Abstract

To analyze the performance of the PID controller in a buck type converter implemented in real time. We begin by designing a continuous controller using the analytical method for calculating PIDs. Pulse width modulation is then used and bifurcation diagrams analyzed to reveal some problems of switching and sampling time. The model converter is then implemented with a PID controller in dSPACE. The experimental results provide detailed requirements of sampling frequency and switching speed, and show the performance of the PID controller. Converters are used in power generation solar systems and conmuted power sources for feed telecommunication devices, smart grids, and other applications.
Optocoupler-based closed-loop hysteresis control for buck converter: experimental results David Estrada Grisales; José Ángel Buitrago Gutiérrez; Fredy E. Hoyos
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 17, No 3: September 2026
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijpeds.v17.i3.pp1842-1851

Abstract

This work experimentally evaluates a simplified closed-loop on-off (hysteresis) controller for a single-phase buck converter using an LM324 comparator and an optocoupler-based gate drive to the IRF830 MOSFET. The controller compares the output voltage against a reference and drives the switch in a binary manner, yielding variable-frequency regulation with low component count. Performance is assessed for DC-DC regulation and dynamic reference tracking under sinusoidal, triangular, and rectangular waveforms at 1 Hz and 60 Hz, as well as under input-voltage droop, load perturbations, and real-time changes in reference waveform. Results show envelope-accurate tracking with fast transients and bounded ripple across all tested conditions, including representative grid-frequency operation. The controller maintains stability and preserves waveform fidelity despite supply and load disturbances; edge transients observed for rectangular references at 60 Hz are consistent with expected output-capacitor dynamics and remain bounded. The findings support the suitability of analogue on-off hysteresis with optocoupler isolation as a low-complexity approach for applications requiring efficient DC-DC conversion and dynamic signal tracking, especially where cost, simplicity, and rapid response are prioritized.
Co-Authors David Estrada Grisales José Ángel Buitrago Gutiérrez Nicolás Toro-García Odair A. Trujillo