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An Improved Calculation of Copper Losses in Integrated Power Inductors on Silicon

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3 Author(s)
Ningning Wang ; Tyndall Nat. Inst., Univ. Coll., Cork, Ireland ; O'Donnell, T. ; O'Mathuna, C.

Thin-film Si-integrated inductors with closed cores have different magnetic field distributions in the winding window space compared to the inductors with unclosed cores. One-dimensional methods are no longer applicable for these inductors to calculate the ac resistance. Based on the analysis of the magnetic field distribution of the devices, a 2-D field solution was developed, which leads to an improved 2-D method to calculate the ac resistance of the device. High accuracy of this new approach has been verified by finite-element analysis, while 1-D methods can lead to significant errors.

Published in:

Power Electronics, IEEE Transactions on  (Volume:28 ,  Issue: 8 )

Date of Publication:

Aug. 2013

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