Journal
IEEE TRANSACTIONS ON POWER ELECTRONICS
Volume 30, Issue 2, Pages 985-995Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPEL.2014.2313611
Keywords
Equivalent circuits; linearization techniques; nonlinear circuits; parasitic capacitance; power semiconductor devices
Categories
Funding
- Colorado Power Electronics Center (CoPEC)
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Nonlinear, voltage-dependent capacitances of power semiconductor devices are capable of having significant impact on the operation of switched-mode power converters. Particularly at high switching frequency, these nonlinearities play a significant role in determining switching times, losses, and converter dynamics during switching transitions. In order to accommodate the well-established design and analysis techniques commonly used for linear circuits, this paper examines the nonlinear voltage-dependence of switching device capacitances and proposes a circuit-oriented analysis technique that allows the parasitic capacitances to be replaced with linear equivalents. The multitude of developed equivalents are verified through full nonlinear simulation in both MATLAB/Simulink and SPICE, as well as through experimental results.
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