On-line fuzzy compensation technique appllied on the load characteristics of a DC to DC converter using microcontroller

Mahmoud Masoud, Ahmed Massoud, Mohamed El-Hawary

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

This paper highlighted the problem of discontinuous conduction encountered with chopper fed de drives under light loads using on-line fuzzy compensation technique. As the load current drops below a critical value depending on the duty cycle (K), there is a nonlinear increase in output voltage. An analytical study was conducted to determine the amount of nonlinear duty cycle compensation required to linearize the load characteristics. The duty cycle compensation offset (△K) takes the form of a negative value of the chopper duty cycle (K) to maintain a constant output voltage equal to that obtained under continuous conduction. The application of this crisp compensation in the form of a lookup table requires considerable memory and interpolation is unavoidable. To circumvent these difficulties the compensation values were fuzzified. A fuzzy rule base was constructed using two input universes of discourse: the armature current (Io) and the original duty cycle (K). The output universe of discourse is the negative offset of the duty cycle (△K). An AVR Atmega 8535 is used to control the chopper duty cycle and perform on-line fuzzy compensation. On-line fuzzy compensation schemes were tested, by using simulation and validated experimentally.

Original languageEnglish
Title of host publicationProceedings of the 11th International Middle East Power Systems Conference, MEPCON'2006
Pages53-58
Number of pages6
Volume1
Publication statusPublished - 2006
Event11th International Middle East Power Systems Conference, MEPCON'2006 - El-minia, Egypt
Duration: Dec 19 2006Dec 21 2006

Other

Other11th International Middle East Power Systems Conference, MEPCON'2006
CountryEgypt
CityEl-minia
Period12/19/0612/21/06

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Keywords

  • dc to dc converter
  • Fuzzy compensation technique
  • Load characteristics
  • On-line compensation

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Fuel Technology
  • Electrical and Electronic Engineering

Cite this

Masoud, M., Massoud, A., & El-Hawary, M. (2006). On-line fuzzy compensation technique appllied on the load characteristics of a DC to DC converter using microcontroller. In Proceedings of the 11th International Middle East Power Systems Conference, MEPCON'2006 (Vol. 1, pp. 53-58). [5372385]