Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1998-02-17
1999-10-19
Ramirez, Nestor
Electrical generator or motor structure
Dynamoelectric
Rotary
310 74, 310178, 310190, 310 89, H02K 709, H02K 2120
Patent
active
059694572
ABSTRACT:
A flywheel energy conversion device provides highly efficient conversion between kinetic and electrical energy. The flywheel produces increased output by providing armature coils in an air gap formed about the flywheel (both radial and axial embodiments are described). In preferred embodiments, field coils of a magnetic circuit are energized with DC drive current that creates homopolar flux within a rotating solid rotor having teeth cut from a flat disk. The total reluctance of the magnetic circuit and total flux remain substantially constant as the rotor rotates. The flux may travel radially outward and exit the flat disk through the teeth passing across an armature air gap. Airgap armature coils are preferably utilized in which the changing flux density (due to the rotating teeth) induces an output voltage in the coils. The flux is diffused before returning to the rotor in one of several ways such that core losses are effectively reduced, thereby enabling the flywheel to operate efficiently at high frequencies.
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Clifton David B.
Pinkerton Joseph F.
Active Power Inc.
Morris Robert W.
Ramirez Nestor
Tamai Karl Imayoshi
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