A comparative investigation on the use of random modulation schemesfor DC/DC converters
Tse, K.K.
Chung, H.S.-H.
Hui, S.Y.R.
So, H.C.
Dept. of Electron. Eng., City Univ. of Hong Hong, Kowloon;
This paper appears in: Industrial Electronics, IEEE Transactions on
Publication Date: Apr 2000
Volume: 47,
Issue: 2
On page(s): 253-263
ISSN: 0278-0046
References Cited: 9
CODEN: ITIED6
INSPEC Accession Number: 6573363
Digital Object Identifier: 10.1109/41.836340
Current Version Published: 2002-08-06
Abstract
A comparative investigation on the use of random modulation
schemes for DC/DC power converters is presented. The modulation schemes
under consideration include randomized pulse position modulation,
randomized pulsewidth modulation (PWM) and randomized carrier-frequency
modulation with fixed and variable duty cycle. The paper emphasizes the
suitability and applicability of each scheme in DC/DC power converters.
Issues addressed include the effectiveness of randomness level on
spreading the dominating frequencies that normally exist in
constant-frequency PWM schemes, and the low-frequency power spectral
density (PSD) of each scheme. The validity of the analyses is confirmed
experimentally by using a DC/DC buck converter operating in the
continuous conduction mode. The PSD of the output under each scheme is
presented and compared
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