Impact of Pseudo-Random Modulation on Measured Conducted EMI

Pena-Quintal, Angel; Loschi, Hermes; Smolenski, Robert; Sumner, Mark; Thomas, Dave; Greedy, Steve; Lezynski, Piotr; Leferink, Frank

Abstract

This paper demonstrates that using conventional frequency scanning methods for the evaluation of conducted electromagnetic interference generated by DC/DC converters can give misleading results when pseudo-random modulation is used as part of the converter control scheme. The paper therefore proposes that the resolution bandwidth of the super heterodyne EMI test receiver used for measurements and the dwell time should be adjusted to match the control parameters of the random modulation scheme. The use of different values for resolution bandwidth and dwell time is demonstrated and measurements for random and fixed modulation schemes are compared.

Citation

Pena-Quintal, A., Loschi, H., Smolenski, R., Sumner, M., Thomas, D., Greedy, S., …Leferink, F. (2022). Impact of Pseudo-Random Modulation on Measured Conducted EMI. IEEE Electromagnetic Compatibility Magazine, 11(2), 84-92. https://doi.org/10.1109/memc.2022.9873829

• Journal Article Type: Article
• Acceptance Date: Jul 21, 2022
• Online Publication Date: Aug 31, 2022
• Publication Date: 2022
• Deposit Date: Apr 13, 2023
• Publicly Available Date: Apr 13, 2023
• Journal: IEEE Electromagnetic Compatibility Magazine
• Print ISSN: 2162-2264
• Electronic ISSN: 2162-2272
• Publisher: Institute of Electrical and Electronics Engineers
• Peer Reviewed: Peer Reviewed
• Volume: 11
• Issue: 2
• Pages: 84-92
• DOI: https://doi.org/10.1109/memc.2022.9873829
• Keywords: Frequency modulation , Electromagnetic interference , Receivers , Switches , Bandwidth , Electromagnetic compatibility , Frequency conversion, DC-DC power convertors , electromagnetic interference , interference suppression, conventional frequency scannin
• Public URL: https://nottingham-repository.worktribe.com/output/11188041
• Publisher URL: https://ieeexplore.ieee.org/document/9873829