DocumentCode :
270543
Title :
Impact of a Bonded-Magnet Adoption on a Specific Fractional Motor Power and Efficiency
Author :
Ferraris, L. ; Franchini, Fausto ; Pošković, Emir ; Tenconi, Alberto
Author_Institution :
Politec. di Torino, Alessandria, Italy
Volume :
50
Issue :
5
fYear :
2014
fDate :
Sept.-Oct. 2014
Firstpage :
3249
Lastpage :
3257
Abstract :
The problem of evaluating the impact on the efficiency consequent to the adoption of bonded magnets in substitution of ferrites in small permanent-magnet machines is faced. That is necessary for the development of the main object of this paper: The evaluation of the obtainable performances of a specific brushless dc motor fractional motor through simple substitution of bonded magnets proposed by the authors to the ferrite magnets used up to now. The final aim is to make clear the practical adoptability of the proposal. Several prototypes produced in the authors´ laboratories have been tested, and a long experimental activity has been carried on. In particular, the focus of the work has been the identification and separation of the iron losses, both hysteresis and eddy currents, from the contribution of the bearings. The corresponding torques have been calculated, and the energetic behaviors of the original machine with ferrites and the prototypes with phenolic bonded magnets have been analyzed. The satisfactory impact on the efficiency and the improvement of the output power of the motor with bonded magnets let possible to consider the analyzed solution as realistically adoptable.
Keywords :
brushless DC motors; eddy current losses; ferrites; machine bearings; permanent magnet motors; bearings; brushless DC motor fractional motor; eddy currents; ferrite magnets; fractional motor efficiency; fractional motor power; hysteresis; iron losses; performance evaluation; phenolic bonded magnets; small permanent-magnet machines; Hysteresis motors; Loss measurement; Magnetic flux; Magnetic hysteresis; Magnetic levitation; Magnetic separation; Torque; Bonded magnets; efficiency; hysteresis; iron losses; permanent-magnet (PM) fractional machines; phenolic resin;
fLanguage :
English
Journal_Title :
Industry Applications, IEEE Transactions on
Publisher :
ieee
ISSN :
0093-9994
Type :
jour
DOI :
10.1109/TIA.2014.2306978
Filename :
6746233
Link To Document :
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