DocumentCode
1285130
Title
Software waiting loop length control: Technique for reduction of radiated EMI from microprocessor-based PWM drive system
Author
Xu, L. ; Zhu, Z.Q. ; Stone, D.A. ; Howe, D.
Author_Institution
Dept. of Bioeng., Toledo Univ., OH, USA
Volume
33
Issue
22
fYear
1997
fDate
10/23/1997 12:00:00 AM
Firstpage
1855
Lastpage
1856
Abstract
A novel technique, referred to as software waiting loop length control (SWLLC), for reducing the radiated EMI from microprocessor-based PWM drive systems is presented. By randomly changing the length of the software waiting loops, the energy concentrated into discrete bands by the action of periodic signals on the external and internal buses of the microprocessor system can be spread across a larger frequency range. Using this technique, significant reduction of radiated interference levels has been observed in a typical PWM drive system
Keywords
pulse width modulation; EMI; PWM drive system; microprocessor; radiated interference; software waiting loop length control;
fLanguage
English
Journal_Title
Electronics Letters
Publisher
iet
ISSN
0013-5194
Type
jour
DOI
10.1049/el:19971245
Filename
630317
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