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Influence of a Thin Copper Shield on a BLDC Motor Parameters

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Author(s): Nándor Burány | Dejana Herceg | Neda Pekarić-Nađ

Journal: Electronics
ISSN 1450-5843

Volume: 16;
Issue: 1;
Start page: 37;
Date: 2012;
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Keywords: Eddy current loss | BLDC rotor shielding

ABSTRACT
A simplified model of a brushless DC motor segment is studied in this work. Shielding of the ferromagnetic structure with a high conductivity layer is explored. The shield is supposed to reduce the ohmic losses of the magnets and of the entire structure, particularly at the higher frequencies. In order to verify that, both calculations and measurements of the power loss are accomplished for the model first. In conclusion, locked rotor measurements are performed on a real BLDC motor in order to validate the results.
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