Electricity: motive power systems – Reciprocating or oscillating motor – Energizing winding circuit control
Patent
1976-11-03
1979-05-22
Schaefer, Robert K.
Electricity: motive power systems
Reciprocating or oscillating motor
Energizing winding circuit control
318439, 318254, 310156, 310218, H02P 700
Patent
active
041561686
ABSTRACT:
A direct current electric motor including a stator assembly having a stator core of magnetic material. The core has therethrough a generally cylindrical cavity and rotatably mounted therein is a cylindrical rotor assembly. Recesses are formed in the wall of the cavity, the recesses defining therebetween motor poles. Coil bobbins are provided, the bobbins being dimensioned to be slidably received in the recesses in positions bounding respective ones of the poles and each bobbin having wound thereon a selected plurality of turns of magnet wire. The length of the stator core and rotor assembly and the number of turns can be selectively varied to provide a motor of desired torque. The bobbins may be molded and provided with integrally formed end portions which close the recesses in the wall of the cavity and provide a cavity having a smooth and continuous cylindrical surface. The motor operates from a source of direct current operating potential and may further include electronic commutating means for alternately and sequentially energizing predetermined ones of the coils in synchronism with the rotation of the rotor. The commutating means is responsive to both the rotation and position of the rotor, permits rotation of the rotor in either direction and includes circuitry which minimizes transient voltages applied to the components thereof.
REFERENCES:
patent: 713603 (1902-11-01), Churchward
patent: 2654037 (1953-09-01), Henter
patent: 2912609 (1959-11-01), Kassner
patent: 3299335 (1967-01-01), Wessels
patent: 3304481 (1967-02-01), Saussele
patent: 3333172 (1967-07-01), Brailsford
patent: 3473069 (1969-10-01), Herbert
patent: 3797106 (1974-03-01), Costello
patent: 3846682 (1974-11-01), Massie
Mutter M. K.
Schaefer Robert K.
Tokheim Corporation
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