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Optocoupler-based closed-loop hysteresis control for buck converter: experimental results

International Journal of Power Electronics and Drive Systems · Vol. 17 No. 3 (2026) · hlm. 1842–1851

DOI
10.11591/ijpeds.v17.i3.pp1842-1851
ISSN
2722-256X, 2088-8694
Terbit
2026-09-01
Penerbit
Institute of Advanced Engineering and Science
Bahasa
eng
Lisensi
creativecommons.org/licenses/by-sa/4.0

Abstrak

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.

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  • Universidad Nacional de Colombia
  • Universidad Católica de Manizales
  • Universidad de Manizales
  • Tecnológico de Antioquia
  • Politécnico de la Costa Atlántica
  • Universidad del Magdalena
  • Institución Universitaria Pascual Bravo
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Rekan penulisOrganisasiArtikel bersama
John Edwin Candelo-BecerraUniversidad Nacional de Colombia10
Nicolás Toro GarcíaUniversidad Nacional de Colombia4
Alejandro RincónUniversidad Católica de Manizales3
Yeison Alberto Garcés-GómezUniversidad Católica de Manizales3
Gloria Yaneth Flórez YépesUniversidad Católica de Manizales3
Eder Alexander Molina ViloriaPolitécnico de la Costa Atlántica2
John Alexander TabordaUniversidad del Magdalena1
Fabiola AnguloAfiliasi tidak diketahui1
Odair Augusto Trujillo OrozcoUniversidad Nacional de Colombia1
Héctor A. Tabares-OspinaInstitución Universitaria Pascual Bravo1
Mauricio García VargasUniversidad Nacional de Colombia1
Carlos Ildefonso Hoyos VelascoNational Research Council1
Luis Gabriel Lafaurie PonceUniversidad Nacional de Colombia1
Sergio Andrés Pizarro PérezAfiliasi tidak diketahui1
Aquiles J. MoreloUniversidad Nacional de Colombia1
Simeón Casanova TrujilloUniversidad Nacional de Colombia1
Susana V. AwadUniversidad Nacional de Colombia1
Joaquin F OrozcoUniversidad Nacional de Colombia1
Gonzalo M AriasTecnológico de Antioquia1
Pablo PeláezTecnológico de Antioquia1
Vladimir Henao-CéspedesUniversidad Católica de Manizales1
Juan Carlos Granobles ToresUniversidad de Manizales1
Ángela María Alzate ÁlvarezUniversidad Católica de Manizales1
Paola Alejandra Vásquez CardonaUniversidad de Manizales1
Luis Alberto Vargas MarínUniversidad de Manizales1
Erika Juliana Aldana ArcilaUniversidad Católica de Manizales1
Esteban Flórez UrregoUniversidad Nacional de Colombia1
Carlos Ulises CassianiUniversidad Nacional de Colombia1

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Sumber metadata: OAI-PMH (metadata jurnal) http://ijpeds.iaescore.com/index.php/IJPEDS/oai, pertama di-harvest 8 Nov 2026, terakhir terlihat 8 Nov 2026.
Metadata asli (oai_dc) 
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	<dc:title xml:lang="en-US">Optocoupler-based closed-loop hysteresis control for buck converter: experimental results</dc:title>
	<dc:creator>Grisales, David Estrada</dc:creator>
	<dc:creator>Gutiérrez, José Ángel Buitrago</dc:creator>
	<dc:creator>Hoyos, Fredy E.</dc:creator>
	<dc:subject xml:lang="en-US">buck converter; hysteresis control; low complexity control; on-off control; optocoupler gate drive</dc:subject>
	<dc:description xml:lang="en-US">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.</dc:description>
	<dc:publisher xml:lang="en-US">Institute of Advanced Engineering and Science</dc:publisher>
	<dc:contributor xml:lang="en-US"></dc:contributor>
	<dc:date>2026-09-01</dc:date>
	<dc:type>info:eu-repo/semantics/article</dc:type>
	<dc:type>info:eu-repo/semantics/publishedVersion</dc:type>
	<dc:type xml:lang="en-US"></dc:type>
	<dc:format>application/pdf</dc:format>
	<dc:identifier>https://ijpeds.iaescore.com/index.php/IJPEDS/article/view/24608</dc:identifier>
	<dc:identifier>10.11591/ijpeds.v17.i3.pp1842-1851</dc:identifier>
	<dc:source xml:lang="en-US">International Journal of Power Electronics and Drive Systems (IJPEDS); Vol 17, No 3: September 2026; 1842-1851</dc:source>
	<dc:source>2722-256X</dc:source>
	<dc:source>2088-8694</dc:source>
	<dc:source>10.11591/ijpeds.v17.i3</dc:source>
	<dc:language>eng</dc:language>
	<dc:relation>https://ijpeds.iaescore.com/index.php/IJPEDS/article/view/24608/15316</dc:relation>
	<dc:rights xml:lang="en-US">Copyright (c) 2026 David Estrada Grisales, José Ángel Buitrago Gutiérrez, Fredy E. Hoyos</dc:rights>
	<dc:rights xml:lang="en-US">http://creativecommons.org/licenses/by-sa/4.0</dc:rights>
</oai_dc:dc>