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Optimised synchronised discrete delta modulation scheme for UPS applications

Optimised synchronised discrete delta modulation scheme for UPS applications

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Published

The concept and results of a new optimised synchronised discrete delta modulation (SDDM) scheme suitable for DC-AC power conversion in uninterruptible power supply (UPS) applications are presented. Unlike the traditional delta modulation scheme, the SDDM scheme has a well defined harmonic spectrum, resulting in simple filter design and reduced radio interterence.

Inspec keywords: DC-AC power convertors; uninterruptible power supplies; delta modulation; synchronisation

Other keywords: uninterruptible power supply; synchronised discrete delta modulation; optimised scheme; UPS applications; DC-AC power conversion; harmonic spectrum

Subjects: Power convertors and power supplies to apparatus; Power electronics, supply and supervisory circuits

References

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      • M.A. Rahman . Performance analysis of delta modulated PWM inverters. IEEE Trans. , 3 , 227 - 233
    2. 2)
      • Hui, S.Y.R., Sathiakumar, S., Gosden, D.: `A microprocessor based discrete delta modulated inverter', IEEE Symp. Power Electronics Circuits, July 1994, Hong Kong, p. 116–119.
    3. 3)
      • Rahman, M.A., Quaicoe, J.E., Chooudhury, M.A., Slemon, G.R.: `Steady-state performance of permanent magnet synchronous motors fed fromdelta modulated inverters', IEEE IAS Conf. Rec., 30 September–4 October 1984, Chicago, IL, USA, p. 1359–1363.
    4. 4)
      • T.C. Green , B.W. Williams . Spectra of delta-sigma modulated inverters: An analytic treatment. IEEE Trans. , 4 , 644 - 654
    5. 5)
      • P.D. Ziogas . The delta modulation techniques in static PWM inverters. IEEE Trans. Ind. Appl. , 199 - 204
    6. 6)
      • C.F. Christiansen . A synchronisation technique for static delta-modulated PWM inverters. IEEE Trans. , 4
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