Size Reduction of a DC link Choke Using Saturation-gap and Biasing with Permanent Magnets

Conference: PCIM Europe 2014 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
05/20/2014 - 05/22/2014 at Nürnberg, Deutschland

Proceedings: PCIM Europe 2014

Pages: 8Language: englishTyp: PDF

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Revilla Aguilar, Andres; Munk-Nielsen, Stig (Aalborg University, Denmark)
Zuccherato, Marco (Danfoss Power Electronics, Denmark)
Thougaard, Hans-Jorgen, (Sintex, Denmark)

This document describes the design procedure of permanent magnet biased DC inductors using the Saturation-gap technique [1]. This biasing configuration can provide a 50% reduction in either the core volume or the number of turns, while meeting its current and inductance requirements. A design example on a 20A 1mH iron laminations DC choke is presented. MEC simulations and empirical measurements on a physical unit were performed. Experimental results show a 50% reduction of the core volume is achieved. The total volume reduction of the inductor is 37%.