Optimización de Recursos en un Microcontrolador en Aplicaciones de Balastros No-Resonantes (Microcontroller Resource Optimization in Non-Resonant Ballast Applications)

René Osorio (reneosorios@yahoo.com)3, Rubén Balderas (ruben.balderas@construlita.com.mx)1, Nimrod Vázquez (n.vazquez@ieee.org)2, Mario Martínez (mariom@valles.udg.mx)3, Sergio Pinto (serpico67@hotmail.com)4

2Instituto Tecnólogico de Celaya
3Universidad de Guadalajara
4Universidad Latina de Panamá

This paper appears in: Revista IEEE América Latina

Publication Date: March 2016
Volume: 14,   Issue: 3 
ISSN: 1548-0992

This paper presents a way to optimize the program of a sliding mode control implemented in a microcontroller, which incorporates an analog comparator as an internal peripheral. The main idea is "to save” microcontroller processing capability by avoiding the use of the analog to digital converter. This saved capability can be used for other tasks that depend in the application. In our case, the saved processing capability was used to generate the necessary signals to control an integrated ballast. The ballast selected as an example is a non-resonant ballast that integrates in a single stage a full-bridge inverter and a Buck converter. This ballast is responsible for feeding an HID lamp with alternating current, and it is also responsible for stabilizing its current. Therefore, the control signals necessary to achieve both tasks are more complicated than those signals which are used to control an ordinary full-bridge inverter. The proposed algorithm for the sliding mode control is a good alternative for applications where power converters are used. Experimental results are shown.

Index Terms:
Sliding mode control, microcontroller, voltage analog comparator, Non-resonant ballast, HID Lamp.   

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