Using low-cost microcontrollers to implement variable hysteresis-width comparators for switching power converters

Josep M. Bosque-Moncusi, Hugo Valderrama-Blavi, Freddy Flores-Bahamonde, Enric Vidal-Idiarte, Luis Martínez-Salamero

Resultado de la investigación: Contribución a una revistaArtículorevisión exhaustiva

4 Citas (Scopus)

Resumen

Hysteretic comparators are often used to implement sliding-mode controllers or other type of discontinuous regulators for power switching converters. Their design is usually performed analogically yielding robust and fast controllers that can even allow converter operation with high values of duty cycle. A new analogue implementation based on a low-cost microcontroller is described in this study showing the mentioned advantages plus the flexibility of a programmable digital system. The proposed comparator employs some microcontroller peripherals without consuming execution time of the control algorithm and without requiring interruption management. It provides variable hysteresis width to obtain constant switching frequency in sliding-mode strategies and can be used in any type of hard switching converter. The dynamic performance of the method is verified experimentally in a boost converter-based rectifier with power factor correction and output voltage regulation in one single stage. The boost converter operates in sliding mode with constant switching frequency and results in a total harmonic distortion of the input current < 1%.

Idioma originalInglés
Páginas (desde-hasta)787-795
Número de páginas9
PublicaciónIET Power Electronics
Volumen11
N.º5
DOI
EstadoPublicada - 1 may 2018
Publicado de forma externa

Áreas temáticas de ASJC Scopus

  • Ingeniería eléctrica y electrónica

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