Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1973-07-31
1976-11-09
Duggan, Donovan F.
Electrical generator or motor structure
Dynamoelectric
Rotary
310162, H02K 3700
Patent
active
039913325
ABSTRACT:
In a motor having a rotor which is a permanent magnet, the rotor is in the form of a cylinder from which portions have been cut forming surfaces symmetrical with respect to the axis of the cylinder. The moment of inertia of the rotor is thereby reduced so that response to a magnetic impulse is more rapid. Further, the plane of magnetism is asymmetric with respect to the plane bisecting the cylindrical surfaces of the rotor, thereby providing for greater thrust under the effect of the yoke and increasing the efficacy of said motor for stepping purposes.
REFERENCES:
patent: 2536805 (1951-01-01), Hansen, Jr.
patent: 2601517 (1952-06-01), Hammes
patent: 2611799 (1952-09-01), Ackerman
patent: 3132558 (1964-05-01), Wymann
patent: 3158796 (1964-11-01), Musgrave
patent: 3416015 (1968-12-01), Ordas
patent: 3594785 (1971-07-01), Orenbuch
patent: 3636557 (1972-01-01), Watkins
Eguchi Hiroshi
Kawamura Yoshikazu
Duggan Donovan F.
Kabushiki Kaisha Suwa Seikosha
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