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Abstract #1276

Low-profile AC/DC coils without RF Chokes

Jixin Xia1,2, Charlotte R. Sappo1,3, William A. Grissom1,3,4, and Xinqiang Yan3,4
1Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, United States, 2Department of Electrical Engineering, Vanderbilt University, Nashville, TN, United States, 3Vanderbilt University Institute of Imaging Science, Nashville, TN, United States, 4Department of Radiology, Vanderbilt University Medical Center, Nashville, TN, United States

Large RF chokes increase the inductance/resistance of the DC loop and thus lead to unwanted power dissipation and bulk. We theoretically analyzed the added coil loss induced by bridge inductors in AC/DC coils and found that large bridge chokes can be replaced by low-profile inductors with much smaller values, if the capacitance is adjusted to compensate the resonance frequency shift. This will reduce the footprint of AC/DC coils as well as the inductance/resistance and thus power dissipation, with a cost of slightly higher coil loss.

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