Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1986-12-16
1988-05-17
Duggan, Donovan F.
Electrical generator or motor structure
Dynamoelectric
Rotary
310 67R, 310154, 310181, H02K 3700
Patent
active
047453125
ABSTRACT:
In a stepping motor having a stator and a rotor, the stator is made of a laminated iron core of a cylindrical shape having a plurality of slots formed around the periphery at a constant pitch. Coil windings concentrately wound are inserted in the slots, and permanent magnets of a planar shape are adhere around the surface of the iron core, thereby providing stator magnetic poles. The rotor on the other hand is made in the form of a circular disk at least a part of which is made of a magnetic material. A number of teeth are formed around the peripheral portion at a constant pitch thereby providing rotor magnetic poles which are positioned in opposition to the stator magnetic poles with a predetermined air gap maintained therebetween.
REFERENCES:
patent: 3555325 (1971-01-01), Inariba
patent: 3984711 (1976-10-01), Kordik
patent: 3999090 (1976-12-01), Sinnott
patent: 4080540 (1978-03-01), Karube
Duggan Donovan F.
Kabushiki Kaisha Yaskawa Denki Seisakusho
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