Digitally Controlled Integrated Electronic Ballast with Dimming and Power Factor Correction Features

 

C. Aguilar–Castillo*¹, C.D. García–Beltrán¹, C. Morcillo–Herrera²

 

¹ Centro Nacional de Investigación y Desarrollo Tecnológico Interior Internado Palmira SN Cuernavaca, Morelos, México. *E–mail: aguilar@cenidet.edu.mx

² Universidad Tecnológica Metropolitana Calle 115 No. 404, Colonia Santa Rosa Mérida, Yucatán, México.

 

ABSTRACT

This paper presents a digitally controlled integrated electronic ballast with dimming and power factor correction features. The control circuit is based on a low–cost PIC16C71 microcontroller where the different strategies for energy saving have been implemented. The ballast is operating in closed loop achieving tight lamp current regulation through a digital Proportional–Integral algorithm. The integrated power stage is based on a frequency–controlled single–switch boost rectifier plus a half–bridge series resonant parallel loaded inverter sharing one power switch. The single–switch boost rectifier works in discontinuous inductor current mode with automatic power factor correction. Detailed analysis of the power stages and experimental results using 42–watt electronic ballast are presented.

Keywords: Electronic ballast, lighting control, active power factor correction, and digital control.

 

RESUMEN

Este artículo presenta un balastro electrónico integrado controlado digitalmente con características de control de intensidad luminosa y corrección del factor de potencia. El circuito de control está implementado en un micro–controlador de bajo costo (PIC16C71), en donde se han implementado distintas estrategias de ahorro de energía. El balastro opera en lazo cerrado con control preciso de la corriente de la lámpara usando para ello un algoritmo de control proporcional–integral. La etapa de potencia está basada en rectificador Boost integrado a un convertidor resonante serie en medio puente, compartiendo un interruptor de potencia. El rectificador Boost opera con corriente discontinua y por tanto obtiene corrección del factor de potencia de manera automática. El artículo presenta el análisis detallado de un balastro electrónico para una lámpara de 42 watts, incluyendo resultados experimentales.

 

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References

[I] Meyer, C., Nienhuis, H., Discharge Lamps, Philips Technical Library, 1988        [ Links ]

[2] Vázquez, R., Analysis of resonant structures with a single transistor like electronic ballast with high power factor, Master thesis, National Center of Investigation and Technological Development, (CENIDET), Cuernavaca, Mor. Mexico, 1999.         [ Links ]

[3] Ruiz, A., Integrated Electronic Ballast with active power factor correction, Master thesis, National Center of Investigation and Technological Development, (CENIDET), Cuernavaca, Mor. Mexico, 1999.         [ Links ]

[4] Hammer, E., McGowan, T., Characteristics of Various F40 Fluorescent Systems AT 60Hz and High Frequency, IEEE, Transactions on Industrial Applications, Vol. 21, Not 1, pp 11–16, 1985        [ Links ]

[5] Spangler, J., Behera, A., Power Factor correction for Used Fluorescent Lamp Ballast, IEEE, PESC'90, pp 1836–1841, 1990.         [ Links ]

[6] Trostl, A., Self configuring dimming interface for fluorescent lamp ballasts, Conference Record of the 2001 IEEE Industry Applications Conference, 2001.Thirty–Sixth IAS Annual Meeting., vol.2, no., pp.906–911 vol.2, 30 Sep–4 Oct 2001.         [ Links ]

[7] Blanco, C., Alonso, M., Lopez, E., Calleja, A., Rico, M., A Single stage Fluorescent Lamp Ballast with high to power Factor, IEEE, APEC'96, 1996.         [ Links ]

[8] Wu, T. F., Chiang, M. C., Chang, B., Analysis and Design of to High Power Factor, Single stage Electronic Ballast with Dimming Feature, IEEE APEC'97, 1997        [ Links ]

[9] Srinvasan, R., Oruganti, R., A unit Power Converter Factor using Half–Bridge Boost Topology, IEEE, Transactions on Power Electronics, vol. 13, no. 13, 1999.         [ Links ]

[10] Freitas–Vieira, J., Có, M., Zoral, L., High Power Factor Electronic Ballast Based on a Single Power Processing Stage, IEEE, PESC'95, pp 687–693, 1995        [ Links ]

[II] Alonso, J.M., Calleja, A.J., Ferrero, F.J., Lopez, E., Ribas, J., Rico–Secades, M., Single–Stage Constant Wattage High Power Factor Electronic Ballast with Dimming Capability, IEEE, PESC'98, vol 2. 1998.         [ Links ]

[12] do Prado, R.N., Bonalso, S.A., Greff, D.S., To High Power Factor Flyback–Half Bridge for Converter Fluorescent Lighting, IEEE, IECON'98, 1998.         [ Links ]

[13] Deng, e., Cuk, S., Single Stage, High Power Factor, Lamp Ballast, IEEE, APEC'94, 1994.         [ Links ]

[14] Brioschi, R.O., Lamego, M.M., Vieira, L.F., A Low Cost High Power Factor Electronic Ballast, Proceedings of the IEEE Industry Applications Society Annual Meeting, 1997, pp. 2360–2365.         [ Links ]

[15] Alonso, J.M., Calleja, A.J., Ribas, J., Lopez, E., Rico–Secades, M., A Novel Low–Cost High–Power–Factor Integrated Ballast for Fluorescent Lamps, Proceedings of the IEEE Industrial Electronics Conference IECON'97, pp.941–946.         [ Links ]

[16] Alonso, M., Calleja, A., López, E., Ribas, J., Rico–Secades, M., A Novel Single Stage Constant–Wattage High–Power–Factor Electronic Ballast, IEEE Transaction on Industrial Electronics, Vol. 46, No. 6, December 1999, pp. 1148–1158.         [ Links ]

[17] Wu, T.F., Chiang, M.C., Chang, E.B., Analysis and Design of a High Power Factor, Single – Stage Electronic Ballast with Dimming Feature, Proceedings of the IEEE Applied Power Electronics Conference–APEC'97, pp. 1030–1036.         [ Links ]

[18] do Prado, R.N., Bonaldo, S.A., Greff, D.S., A High Power Factor Flyback–Half–Bridge Electronic Ballast with Dimming Feature, Proceedings of the IEEE Industry Applications Conference Annual Meeting, 1998, pp. 2082–2088.         [ Links ]

[19] Takahashi, N., Kato, Y., Ohkita, M., Okutso, K., Matsuyama, M., Nakaoka, M., Two Switch Boost Chopper–Based PFC Converter for Electronic Ballast, in Proceedings of the International Conference on Power Electronics and Drive Systems PEDS'99, pp. 511–515.         [ Links ]

[20] Alonso, J.M., Villegas, P.J., Diaz, J., Blanco, C., Rico–Secades, M., A microcontroller–Based Ballast for Fluorescent Lamps, IEEE Transaction on Industrial Electronics, Vol. 44, No. 2, April 1997, pp. 207–216.         [ Links ]

[21] Alonso, J.M., Ribas, J., Coz, J.J., Calleja, A.J., Corominas, E.L., Rico–Secades, M., Development of a Distributive Control Scheme for Fluorescent Lighting Based on LonWorks Technology, IEEE Transaction on Industrial Electronics, Vol. 47, No. 6, December 2000, pp. 1253–1262.         [ Links ]

[22] Wu, T.F., Yu, T.H., An Electronic Dimming Ballast with Bifrequency and Fuzzy Logic Control, IEEE Transaction on Industry Application, Vol. 36, No 5, September/October 2000, pp. 1308–1317.         [ Links ]

[23] Microchip Technology Inc., "PIC16C71 Reference Manual".         [ Links ]