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CM noise reduction of isolated converter by balancing technique.

Nasir, and Cobb, J. E., 2016. CM noise reduction of isolated converter by balancing technique. In: IEEE Power and Energy Conference at Illinois (PECI), 2016, 19-20 February 2016, University of Illinois, Urbana-Champaign.

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CM Noise Reduction Paper.pdf - Accepted Version
Available under License Creative Commons Attribution Non-commercial.



Common mode (CM) EMI noise in an isolated converter is mainly due to parasitic capacitance occurring within the SMPS. It flows through the transformer coupling capacitance and the parasitic capacitance of switching MOSFETs and rectification diodes. Several techniques have been proposed in the literature to reduce CM noise. The most common techniques are compensation, shielding, and the balancing-shielding technique. In this paper, a new balancing technique is described to reduce the noise of both parasitic capacitances of MOSFETs and transformer inter-winding capacitance. Analysis is presented to demonstrate the efficacy of the compensation method and the resultant reduction in EMI noise. Finally, the practical measurement results obtained from a practical implementation of the new technique in a flyback converter topology, are presented as verification of the benefits of the approach in comparison to the conventional method.

Item Type:Conference or Workshop Item (Paper)
Group:Faculty of Science & Technology
ID Code:33347
Deposited By: Symplectic RT2
Deposited On:03 Feb 2020 15:59
Last Modified:14 Mar 2022 14:19


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