Electrical generator or motor structure – Dynamoelectric – Rotary
Reexamination Certificate
2007-01-24
2009-11-10
Lam, Thanh (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Rotary
C310S180000
Reexamination Certificate
active
07615904
ABSTRACT:
A method is disclosed for arranging and exciting the stator, rotor and various windings of a multi-stage brushless high frequency alternator so that the resulting multiple high frequency sub-phase armature winding outputs can be rectified and commutated into three phase power frequency alternating current (AC) electrical output. Power frequency currents in field windings control output amplitude, output frequency, and output phase. Devices incorporating this arrangement are suitable of generating fixed frequency electrical power while accommodating variable speed rotation of a generator shaft and offer multiple advantages over existing techniques. The capability to generate speed independent electric power allows natural power sources such as windmills and hydro-power stations to be efficiently coupled to fixed frequency power grids.
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Tupper Christopher N.
Wood Duncan G.
Caseiro Chris A.
Lam Thanh
Raven Energy Alternatives, LLC
Verrill & Dana, LLP
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