Reduction of EMI through switching frequency dithering

Abbas A. Fardoun; Ali Assi; Esam H. Ismail

doi:10.1109/MWSCAS.2007.4488642

Reduction of EMI through switching frequency dithering

Abbas A. Fardoun, Ali Assi, Esam H. Ismail

Department of Electrical and Communication Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

2 Citations (Scopus)

Abstract

In this paper, a method is presented to reduce Electro-Magnetic Emissions in AC Drives. This method is applicable to many AC drives. It is proposed to dither the switching frequency of the power devices of the inverter in a pseudo-random way to spread out the emitted Radio-Frequency (RF) energy over larger frequency range. The proposed method requires only software changes. Practical constraints to implement the frequency dithering approach are discussed. Simulation & measurements shows an improvement of more than 10 dB. The proposed method also converts certain spikes at integer harmonics of the switching frequency from narrow band to broadband noise.

Original language	English
Title of host publication	2007 50th Midwest Symposium on Circuits and Systems, MWSCAS - Conference Proceedings
Pages	538-541
Number of pages	4
DOIs	https://doi.org/10.1109/MWSCAS.2007.4488642
Publication status	Published - 2007
Event	2007 50th Midwest Symposium on Circuits and Systems, MWSCAS - Conference - Montreal, QC, Canada Duration: Aug 5 2007 → Aug 8 2007

Publication series

Name	Midwest Symposium on Circuits and Systems
ISSN (Print)	1548-3746

Other

Other	2007 50th Midwest Symposium on Circuits and Systems, MWSCAS - Conference
Country/Territory	Canada
City	Montreal, QC
Period	8/5/07 → 8/8/07

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

Access to Document

10.1109/MWSCAS.2007.4488642

Cite this

Fardoun, AA, Assi, A & Ismail, EH 2007, Reduction of EMI through switching frequency dithering. in 2007 50th Midwest Symposium on Circuits and Systems, MWSCAS - Conference Proceedings., 4488642, Midwest Symposium on Circuits and Systems, pp. 538-541, 2007 50th Midwest Symposium on Circuits and Systems, MWSCAS - Conference, Montreal, QC, Canada, 8/5/07. https://doi.org/10.1109/MWSCAS.2007.4488642

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abstract = "In this paper, a method is presented to reduce Electro-Magnetic Emissions in AC Drives. This method is applicable to many AC drives. It is proposed to dither the switching frequency of the power devices of the inverter in a pseudo-random way to spread out the emitted Radio-Frequency (RF) energy over larger frequency range. The proposed method requires only software changes. Practical constraints to implement the frequency dithering approach are discussed. Simulation & measurements shows an improvement of more than 10 dB. The proposed method also converts certain spikes at integer harmonics of the switching frequency from narrow band to broadband noise.",

author = "Fardoun, {Abbas A.} and Ali Assi and Ismail, {Esam H.}",

year = "2007",

doi = "10.1109/MWSCAS.2007.4488642",

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series = "Midwest Symposium on Circuits and Systems",

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note = "2007 50th Midwest Symposium on Circuits and Systems, MWSCAS - Conference ; Conference date: 05-08-2007 Through 08-08-2007",

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AU - Assi, Ali

AU - Ismail, Esam H.

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AB - In this paper, a method is presented to reduce Electro-Magnetic Emissions in AC Drives. This method is applicable to many AC drives. It is proposed to dither the switching frequency of the power devices of the inverter in a pseudo-random way to spread out the emitted Radio-Frequency (RF) energy over larger frequency range. The proposed method requires only software changes. Practical constraints to implement the frequency dithering approach are discussed. Simulation & measurements shows an improvement of more than 10 dB. The proposed method also converts certain spikes at integer harmonics of the switching frequency from narrow band to broadband noise.

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SN - 9781424411764

T3 - Midwest Symposium on Circuits and Systems

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BT - 2007 50th Midwest Symposium on Circuits and Systems, MWSCAS - Conference Proceedings

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ER -

Reduction of EMI through switching frequency dithering

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