Document Type
Conference Item (Restricted)
Publication Date
1-1-2004
Abstract
A mathematical approach of modelling and analysing three-phase pulse width modulation (PWM) is presented. The three-phase flyback converter required a unique pattern of PWM to optimise the power transfer in the magnetic circuit used in the converter. The three-phase PWM is generated digitally based on uniform symmetrical sampling technique using Xilinx chip. The generated PWM pattern is able to reduce the low order of harmonic components present in the input AC supply. Although software simulation could simulate the PWM pattern, it does not represent the exact pattern as been generated digitally. The mathematical approach used is to model the PWM pattern exactly as been created digitally. The proposed mathematical technique could also be used to analyse any digital PWM. The result of the mathematical analysis on the PWM pattern could be used to study the characteristics of the pattern such as maximum and minimum value of duty cycle, pulse width, turn-on time, turn-off time and modulation index. To verify the validity of the proposed technique, the results obtained from the mathematical model, experimental and simulation using PSpice were compared.
Keywords
Blue phase modulating signals, Digital techniques, Harmonic currents, Electric current distribution, Mathematical models, Microprocessor chips, Power transmission, Pulse width modulation, Sampling, Signal processing, Switching, Power converters.
Divisions
fac_eng
Volume
5
Event Title
2004 IEEE 35th Annual Power Electronics Specialists Conference, PESC04
Event Location
Aachen
Event Type
conference
Additional Information
Conference code: 63911 Export Date: 16 November 2012 Source: Scopus CODEN: PRICD doi: 10.1109/PESC.2004.1355093 Language of Original Document: English Correspondence Address: Mekhilef, S.; Dept. of Electrical Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia; email: saad@um.edu.my References: Rahim, N.A., Green, T.C., Williams, B.W., PWM ASIC design for the three-phase bidirectional buck converter (1996) International Journal of Electronics, 81 (5), pp. 603-615; Makhlief, S., Rahim, N.A., Omar, A.M., Microprocessor implementation of three phase PWM switching strategies (1999) IEEE International Conference on Power Electronics and Drive System, PEDS'99, pp. 30-36. , July; Agelidis, V.G., Ziogas, P.D., Dead-band PWM switching patterns (1996) IEEE Transactions on Power Electronics, 11 (4), pp. 522-531. , July; Holtz, J., Pulsewidth modulation for power electronic power conversion (1994) IEEE Transactions on Power Electronics, 82 (8), pp. 1194-1214. , Aug; Pressman, A.I., (1999) Switching Power Supply Design, , McGraw-Hill International; Mathcad User 'S Guide, Mathcad 6.0, , Matchcad PLUS 6.0 Sponsors: IEEE Power Electronics Society; IEEE Joint IAS/PELS/IES German Chapter