Electromagnetic machine with at least one pair of concentric rings having modularized magnets and yokes
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United States of America Patent
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Dec 1, 1998
Issued Date -
N/A
app pub date -
Apr 2, 1997
filing date -
Jun 3, 1993
priority date (Note) -
Expired
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Abstract
An electromagnetic machine which is suitable for use as a direct-drive, directly-coupled, mains electricity generator (14) to be driven by a low speed device such as a wind turbine (18), consists of one or more rotor rings (30) of many permanent magnets (40) of alternating polarity, with coaxial stator rings (28) of many laminated yokes (35), each yoke defining slots to locate coils (38). The yokes (35) and coils (38) form modules which are supported by beams (32) relative to the rotor rings (30). The rotor rings (30) may also be of modular construction. Manufacture and assembly are thereby simplified, and sub-harmonic magnetic flux components are suppressed.
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