Delta Modulation with PI Controller—A Comparative Study
DOI: 10.4236/jemaa.2009.13023   PDF    HTML     8,318 Downloads   13,667 Views   Citations


The paper discusses the application of PWM delta modulation with PI controller as an alternative to the standard PWM techniques for providing gating signals to the voltage source inverters. Its inherent characteristics of constant volts/Hertz control without feedback complexity and boosting of the fundamental voltage makes it an excellent choice for motor drive applications. This paper discusses the comparison between a basic delta modulation, the advanced Delta modulation with PI controller and an optimized DMPI. It is shown that in addition to the aforementioned advantages, VSI with optimized DMPI produces superior load current/voltage waveforms compared to simple DMPI, when IGBT is employed as a switching device for the inverter. Since the tacho feedback or other traditional speed sensing means is not permissible in sealed motor or the pump, a novel method is used to monitor the motor speed from the terminal quantities like voltage, current, and motor input power factor.

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A. MASWOOD and S. ANJUM, "Delta Modulation with PI Controller—A Comparative Study," Journal of Electromagnetic Analysis and Applications, Vol. 1 No. 3, 2009, pp. 145-151. doi: 10.4236/jemaa.2009.13023.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] P. D. Ziogas, “The delta modulation techniques in static PWM inverters,” IEEE Transactions on Ind. Applications, pp.199–04, Mar/Apr. 1981.
[2] M. A. Rahman, J. E. Quacioe, and M. A. Chowdhury, “Performance analysis of delta modulated PWM,” IEEE Transactions in Power Electronics, Vol. PE–2, No. 3, pp. 227–233, July 1987.
[3] T. C. Green, J. C. Salmon and B. W. Willams, “Investigation of delta modulation and of subharmonic elimination techniques,” IEEE PESC Record, Vol. 1, April 1988.
[4] M. A. Rahman, J. E. Quacioe, and M. A. Chowdhury, “Harmonic minimization in Delta modulated inverters using Tuned filters,” IEEE PESC Record, Vol. 1, April 1988.
[5] A. I. Maswood, P. D. Ziogas, and G. Joos, “Problems and solutions associated with the operation of phase controlled rectifiers under unbalanced input voltage conditions,” IEEE Transactions on Industry Applications, U.S.A, Vol. 27, No. 4, pp. 765–772, July/August 1991.
[6] A. I. Maswood and M. A. Rahman, “A survey of delta modulation techniques, characteristics & sub harmonic elimination for VSI,” Electric Machines and Power Systems Journal, U.S.A., Vol. 26, No. 6, pp. 435–448, July 1998.
[7] A. I. Maswood and S. Wei, “A novel current source PWM drive topology with specific harmonic elimination switching patterns,” IEEE Canadian Conference on Electrical & Computer engineering, CCECE, Halifax, Nova Scotia, May 8–10, 2000.
[8] A. I. Maswood and M. A. Rahman, ”A PWM voltage source inverter with PI controller, performance parameters under non-ideal conditions,” published in the Electric Power Systems Research [EPSR] Journal, U.S.A, Vol. 38, No. 1, pp 19–24, 1996.
[9] A. I. Maswood and M. H. Rashid, “A novel method of harmonic assessment generated by 3–Phase AC-DC converters under unbalanced supply conditions,” IEEE Transactions on Industry Applications, U.S.A, Vol. 24, No. 4, pp. 590–597, July/August 1988.
[10] M. H. Kheraluwala and D. M. Divan, “Delta modulation strategies for resonant link inverters,” IEEE Transactions on Power Electronics, Vol. 5, No. 2, pp. 220–227, April 2000.

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