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Physics-Based Modeling of Power Converters From Finite Element Electromagnetic Field Computations

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2 Author(s)
Nejadpak, A. ; Electr. & Comput. Eng. Dept., Florida Int. Univ., Miami, FL, USA ; Mohammed, O.A.

In this paper, a physics-based high-frequency (HF) model of switching power converters including the insulated gate bipolar transistor (IGBT) unit cells, heat sink, and connective printed circuit board (PCB) traces combined in a single electrical circuit is presented. The IGBT model includes the HF stray components superimposed on the well-known Hefner IGBT model. The HF components were calculated using a 3-D quasi-static finite element (3-D FE) analysis. The proposed complex model of the IGBT was verified both numerically and experimentally at different switching frequencies. The computed IGBT model was used in a low-high frequency model of a motor-drive system, and the common mode ground current was experimentally verified showing excellent results.

Published in:

Magnetics, IEEE Transactions on  (Volume:49 ,  Issue: 1 )

Date of Publication:

Jan. 2013

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