<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml"><p>The authors consider the possibility to raise the specific power of synchronous generators with excitation from inexpensive permanent magnets. For this purpose, it is proposed to use tooth-wise windings and permanent magnets based on inexpensive magneto-hard material, e.g. strontium-ferrite. The magnets are to be placed between the rotor teeth, the alternate polarity of which is facing the air-gap. This provides a simpler and cheaper technology of making such a generator and improves its reliability. The proposed rational bevelling of the stator teeth not only raises the specific power of the generator but also reduces the level of noise and vibrations, extends the longevity of the magnets and bearings as well as facilitates the starting torque of the electric machine, e.g. if it is employed as wind generator.</p></abstract>

The authors consider the possibility to raise the specific power of synchronous generators with excitation from inexpensive permanent magnets. For this purpose, it is proposed to use tooth-wise windings and permanent magnets based on inexpensive magneto-hard material, e.g. strontium-ferrite. The magnets are to be placed between the rotor teeth, the alternate polarity of which is facing the air-gap. This provides a simpler and cheaper technology of making such a generator and improves its reliability. The proposed rational bevelling of the stator teeth not only raises the specific power of the generator but also reduces the level of noise and vibrations, extends the longevity of the magnets and bearings as well as facilitates the starting torque of the electric machine, e.g. if it is employed as wind generator.

Direct-Drive Synchronous Generators with Excitation from Strontium-Ferrite Magnets: Efficiency Improvement

Riga Technical University 1 Kalku Str., Riga, LV-1658, LATVIA

Latvian Journal of Physics and Technical Sciences

The authors consider the possibility to raise the specific power of synchronous generators with excitation from inexpensive permanent magnets. For this...

Direct-Drive Synchronous Generators with Excitation from Strontium-Ferrite Magnets: Efficiency Improvement

Published Online: Jul 20, 2012

Page range: 3 - 13

DOI: https://doi.org/10.2478/v10047-012-0018-0

Keywords
wind generator, permanent magnets, bevel teeth, pole overlapping

This content is open access.

Direct-Drive Synchronous Generators with Excitation from Strontium-Ferrite Magnets: Efficiency Improvement

Published Online: Jul 20, 2012

Page range: 3 - 13

DOI: https://doi.org/10.2478/v10047-012-0018-0

Keywordswind generator, permanent magnets, bevel teeth, pole overlapping

This content is open access.

Keywords
wind generator, permanent magnets, bevel teeth, pole overlapping