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Comprehensive SPICE Model for Power Inductor Losses

: Ehrlich, S.; Joffe, C.; Thielke, H.; Leinfelder, M.; März, M.


Power Sources Manufacturers Association; IEEE Power Electronics Society; IEEE Industry Applications Society:
Thirty-Fourth Annual IEEE Applied Power Electronics Conference, APEC 2019. Proceedings : Anaheim, California, 17-21 March 2019
Piscataway, NJ: IEEE, 2019
ISBN: 978-1-5386-8330-9
ISBN: 978-1-5386-8329-3
ISBN: 978-1-5386-8331-6
Annual Applied Power Electronics Conference and Exposition (APEC) <34, 2019, (Anaheim/Calif.>
Bundesministerium für Bildung und Forschung BMBF (Deutschland)
Conference Paper
Fraunhofer IISB ()

This paper presents a comprehensive SPICE model of a power inductor including winding losses, eddy current losses within a soft magnetic ferrite material and hysteresis losses as well as the self-resonance. With an adaption of the well-known Steinmetz's equation for hysteresis losses, non-sinusoidal waveforms of hard-switching topologies such as DC/DC converters or PFC stages are taken into account. The small-signal impedance of the power inductor is modeled on basis of small-signal measurements that are adapted to an equivalent circuit by an algorithm. Outstanding advantages of the model are the simple generation out of data sheet parameters and a single impedance measurement as well as a good accuracy.