Comparative performance evaluation of fixed and adaptive hysteresis band delta modulation techniques for UPS

Author

Sae-Sue, S. ; Kinnares, V. ; Tangsiriworakul, Ch. ; Potivejkul, S.

Author_Institution

Dept. of Electr. Eng., Mahanakorn Univ. of Technol., Bangkok, Thailand

Volume

2

fYear

1999

fDate

1999

Firstpage

956

Abstract

The problem in a fixed hysteresis band delta modulation technique is a variation of switching frequency over the fundamental period of the modulation signal. This causes more subharmonics and higher load current ripple when compared to the fixed PWM switching frequency. A simple constant switching frequency delta modulator with adaptive hysteresis band is proposed in this paper. This research work contributes to comparative performance evaluation of proposed and conventional delta modulation techniques in order to be applied to a UPS. Also, the appropriate filter design is given

Keywords

DC-AC power convertors; PWM invertors; delta modulation; harmonic distortion; power conversion harmonics; power harmonic filters; switching circuits; uninterruptible power supplies; UPS; adaptive hysteresis band delta modulation technique; comparative performance evaluation; constant switching frequency delta modulator; load current ripple; modulation signal; power harmonic filter design; subharmonics; switching frequency; voltage source invertors; Delta modulation; Hysteresis; Output feedback; Power harmonic filters; Pulse width modulation; Pulse width modulation inverters; Signal processing; Switching frequency; Uninterruptible power systems; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics and Drive Systems, 1999. PEDS '99. Proceedings of the IEEE 1999 International Conference on

Print_ISBN

0-7803-5769-8

Type

conf

DOI

10.1109/PEDS.1999.792837

Filename

792837