A methodology for true comparison of analytical and measured frequency domain spectra in random PWM converters

Author

Bech, M.M. ; Pedersen, J.K. ; Blaabjerg, Frede ; Trzynadlowski, A.M.

Author_Institution

Inst. of Energy Technol., Aalborg Univ., Denmark

Volume

1

fYear

1998

fDate

17-22 May 1998

Firstpage

36

Abstract

The analysis of random PWM techniques has matured into a state where analytical expressions have been derived to aid in understanding the frequency domain characteristics. Derivations of the formulas require a lot of algebra, and the expressions must be verified by laboratory measurements. It is shown, however, that factors originating from digital signal processing techniques make the comparison difficult if proper measures against misinterpretation are not taken. A methodology to overcome the problems is presented. Novel expressions for the random lead-lag pulse position technique and the random switching frequency technique are also presented, as well as their verifications by laboratory measurements on a full-bridge DC/DC converter

Keywords

DC-DC power convertors; PWM power convertors; bridge circuits; frequency-domain analysis; signal processing; spectral analysis; digital signal processing techniques; full-bridge DC/DC converter; laboratory measurements; measured frequency domain spectra; random PWM converters; random lead-lag pulse position technique; random switching frequency technique; spectral analysis; Algebra; DC-DC power converters; Digital signal processing; Frequency domain analysis; Frequency measurement; Laboratories; Position measurement; Pulse measurements; Pulse width modulation; Switching frequency;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics Specialists Conference, 1998. PESC 98 Record. 29th Annual IEEE

Conference_Location

Fukuoka

ISSN

0275-9306

Print_ISBN

0-7803-4489-8

Type

conf

DOI

10.1109/PESC.1998.701876

Filename

701876