Abstract #1276

Low-profile AC/DC coils without RF Chokes

Jixin Xia^1,2, Charlotte R. Sappo^1,3, William A. Grissom^1,3,4, and Xinqiang Yan^3,4

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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