Conference proceedings article
Premagnetization of High-Power Low-Frequency DC-Inductors in Power Electronic Applications
Publication Details
Authors: | Friebe, J.; Langfermann, S.; Sascha; Owzareck, M. |
Editor: | VDE |
Publisher: | VDE Verlag |
Place: | Berlin |
Publication year: | 2019 |
Pages range : | 1366-1372 |
Book title: | PCIM Europe 2019; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management |
Title of series: | PCIM Europe Conference Proceedings |
ISBN: | 978-3-8007-4938-6 |
Abstract
In the power electronics area low-frequency inductors are subject to the saturation magnetic flux density of soft magnetic materials which often suffer from large volumes and number of turns. In this paper a premagnetization solution for high-power low-frequency DC inductors is presented. The sintered NdFeB magnets are used to increase the usable saturation flux density range up to 3 T of the soft magnetic material thereby the number of turns and volume of the premagnetized inductor can be significantly reduced. In order to decrease the hard magnetic losses which are caused by the eddy currents the hard magnet is divided into small pieces. Magnetic circuit calculations and finite element simulations are shown for the design of the premagnetized inductor. Finally the theoretical results will be verified by experiments. Furthermore the optimal geometry is also being discussed.
In the power electronics area low-frequency inductors are subject to the saturation magnetic flux density of soft magnetic materials which often suffer from large volumes and number of turns. In this paper a premagnetization solution for high-power low-frequency DC inductors is presented. The sintered NdFeB magnets are used to increase the usable saturation flux density range up to 3 T of the soft magnetic material thereby the number of turns and volume of the premagnetized inductor can be significantly reduced. In order to decrease the hard magnetic losses which are caused by the eddy currents the hard magnet is divided into small pieces. Magnetic circuit calculations and finite element simulations are shown for the design of the premagnetized inductor. Finally the theoretical results will be verified by experiments. Furthermore the optimal geometry is also being discussed.
