Abstract

This paper reports on a study on the development of a hybrid bonding for electrical machine stacks. The hybrid bonding consists in an iron powder adding in the adhesive of the bonding layer of the stack. Two types of iron powder are used: the first is obtained with water atomization, the second with carbon monoxide reduction. Both types provide different properties. The two types of powder are loaded in the stack sample, which consists in a ring core. Characterization measurements are mainly iron losses and permeability measurements. Both powder types resulted in interesting performances, due to the magnetic permeability and potential thermal conductivity improvement. However, the preliminary results should be confirmed with a more detailed characterization, including reproducibility tests. Index Terms-Bonding, Electrical machine, Ferromagnetic steel sheets, Iron powder.

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