TY - GEN
T1 - A systematic approach to modeling impedances and current distribution in planar magnetics
AU - Chen, Minjie
AU - Araghchini, Mohammad
AU - Afridi, Khurram K.
AU - Lang, Jeffrey H.
AU - Sullivan, Charles R.
AU - Perreault, David J.
PY - 2014
Y1 - 2014
N2 - Planar magnetic components using printed-circuit-board windings are attractive due to their high repeatability, good thermal performance and usefulness for realizing intricate winding patterns. To enable higher system integration at high switching frequency, more sophisticated methods that can rapidly and accurately model planar magnetics are needed. This paper develops a lumped circuit model that captures the impact of skin and proximity effects on current distribution and electromagnetic fields in planar magnetics. This enables accurate predictions of impedances, losses, stored reactive energy and current sharing among parallel windings. This lumped model is also a circuit domain representation of electromagnetic interactions. It can be used to simulate circuits incorporating planar magnetics, to visualize the electromagnetic fields, and to extract parameters for magnetic models by simulations. The modeling results match with previous theories and finite-element-modeling results. A group of planar magnetic devices, including transformers and inductors with various winding patterns, are prototyped and measured to validate the proposed approach.
AB - Planar magnetic components using printed-circuit-board windings are attractive due to their high repeatability, good thermal performance and usefulness for realizing intricate winding patterns. To enable higher system integration at high switching frequency, more sophisticated methods that can rapidly and accurately model planar magnetics are needed. This paper develops a lumped circuit model that captures the impact of skin and proximity effects on current distribution and electromagnetic fields in planar magnetics. This enables accurate predictions of impedances, losses, stored reactive energy and current sharing among parallel windings. This lumped model is also a circuit domain representation of electromagnetic interactions. It can be used to simulate circuits incorporating planar magnetics, to visualize the electromagnetic fields, and to extract parameters for magnetic models by simulations. The modeling results match with previous theories and finite-element-modeling results. A group of planar magnetic devices, including transformers and inductors with various winding patterns, are prototyped and measured to validate the proposed approach.
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U2 - 10.1109/COMPEL.2014.6877143
DO - 10.1109/COMPEL.2014.6877143
M3 - Conference contribution
AN - SCOPUS:84906821068
SN - 9781479921478
T3 - 2014 IEEE 15th Workshop on Control and Modeling for Power Electronics, COMPEL 2014
BT - 2014 IEEE 15th Workshop on Control and Modeling for Power Electronics, COMPEL 2014
PB - IEEE Computer Society
T2 - 2014 IEEE 15th Workshop on Control and Modeling for Power Electronics, COMPEL 2014
Y2 - 22 June 2014 through 25 June 2014
ER -