Electricity: motive power systems – Motor-reversing – Armature or primary circuit control
Patent
1976-01-05
1978-03-28
Duggan, Donovan F.
Electricity: motive power systems
Motor-reversing
Armature or primary circuit control
318221D, 310166, 310268, H02K 1700
Patent
active
040817261
ABSTRACT:
An electric induction motor having at least two phases and including opposed slotted stator bodies or pole pieces with each slot receiving a radially extending leg or like portion of at least one coil winding, and with the stator being preferably of an annular, segmented configurationand the rotor being a low inertia, non-magnetic, radially slotted, electrically conductive disc axially spaced from the face of the stator bodies. The motor is particularly adapted for direct drive of rapidly reversible driven members, such as washing machine agitators or the like, and is characterized by high starting torque and a relatively direct proportional relation between the applied voltage and available output torques. In use, the motor operates at varying speeds and torque as it reverses direction and accelerates to a given rotational velocity, drawing substantially constant power during use. The current paths characterizing the unit are similar to the currents in a squirrel cage motor, while an axial gap, low inertia rotor provides the advantages of easy reversibility and maximal heat loss.
REFERENCES:
patent: 2476073 (1949-07-01), Trickey
patent: 2549265 (1951-04-01), Trant
patent: 3194032 (1965-07-01), Von Brimer
patent: 3223867 (1965-12-01), Shapiro
patent: 3225235 (1965-12-01), Lee
patent: 3333124 (1967-07-01), Francis et al.
patent: 3355914 (1967-12-01), Venema et al.
patent: 3688170 (1972-08-01), Karklys et al.
Brimer Claude Morris
Von Brimer, deceased Joe W.
Duggan Donovan F.
Linear International Corporation
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