TY - GEN
T1 - On-line fuzzy compensation technique appllied on the load characteristics of a DC to DC converter using microcontroller
AU - Masoud, Mahmoud
AU - Massoud, Ahmed
AU - El-Hawary, Mohamed
N1 - Funding Information:
The present study was supported by the Praeventiefonds, the Pro-grammeringscollege Onderzoek Maatschappelijke Dienstverlening (Ministry of Welfare, Health and Cultural Affairs), the K.F. Heijn-- fonds, the Stichting voor Vergeten Groepen, the Stichting Elise Mathi-lde Fonds, the Stichting 'De Balije, ' the Profdr Weijers Stichting, the Evert Zoudenbalchhuis, Crediet & Effectenbank, and the Stichting Lameris Foundation. We thank P. Koele, Ph.D. for his statistical support.
PY - 2006
Y1 - 2006
N2 - 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.
AB - 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.
KW - Fuzzy compensation technique
KW - Load characteristics
KW - On-line compensation
KW - dc to dc converter
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M3 - Conference contribution
AN - SCOPUS:77649286294
SN - 9781424451111
T3 - Proceedings of the 11th International Middle East Power Systems Conference, MEPCON'2006
SP - 53
EP - 58
BT - Proceedings of the 11th International Middle East Power Systems Conference, MEPCON'2006
T2 - 11th International Middle East Power Systems Conference, MEPCON'2006
Y2 - 19 December 2006 through 21 December 2006
ER -