Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1989-08-14
1990-12-04
Stephan, Steven L.
Electrical generator or motor structure
Dynamoelectric
Rotary
310166, 318696, 318700, H02K 2128, H02K 2138, H02P 800
Patent
active
049756087
ABSTRACT:
A reluctance motor is powered by a commutated ac voltage supply which comprises full cycles of the ac waveform interspersed with periods of zero power of fixed duration measured in full cycles. Motor structures are described which combine, with the above method of excitation, a feature by which a portion of the magnetic circuit carrying the magnetic flux developing reluctance drive torque during the power-on periods is magnetized cyclically over a range above the knee of the application B-H curve. A closed circuital dc flux path through this portion and separate from the ac flux route through the stator poles is magnetized as by permanent magnets to secure this near-saturation condition in which thermodynamic adiabatic cooling processes operate to enhance the power conversion efficiency of the motor by virtue of domain flux rotation processes.
REFERENCES:
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patent: 3483410 (1969-12-01), Siegelman et al.
patent: 3535572 (1970-10-01), Rugeris
patent: 4320330 (1982-03-01), Bahr et al.
patent: 4500824 (1985-02-01), Miller
patent: 4567407 (1986-01-01), Ecklin
patent: 4611157 (1986-09-01), Miller et al.
patent: 4772839 (1988-09-01), MacMinn et al.
Rebsch D. L.
Stephan Steven L.
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