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Effects of Nonperiodic and Chaotic Switching on the Conducted EMI Emissions of Switch Mode Power Supplies
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| Author(s) |
Mikko Kuisma; Pertti Silventoinen; Tero Järveläinen; Tony Vesterinen |
| Abstract |
Switch mode power supplies (SMPS) that have a periodic
switching pattern have an EMI spectrum that contains
switching frequency and its harmonic frequencies with
significant amplitude at least up to 21st harmonic. Two
methods to reduce the harmonic frequencies basing on the
spread spectrum technology are presented in this paper.
First method is based on hysteresis control and the other
one utilizes chaotic phenomena. Some answers to question
“Is the spread spectrum switching a method to decrease
EMI emissions or just a way to bluff the measurement
devices?” are presented. |
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| Filename: | Unnamed file |
| Filesize: | 1.019 MB |
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| Type |
Members Only |
| Date |
Last modified 2006-02-20 by System |
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