Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1981-01-16
1982-07-13
Duggan, Donovan F.
Electrical generator or motor structure
Dynamoelectric
Rotary
310156, 310162, H02K 3700
Patent
active
043396798
ABSTRACT:
A low inertia synchronous induction motor for driving a daisy wheel printing element comprising a rotor assembly including an elongated motor shaft, a first laminated drum-shaped pole piece mounted concentrically on the shaft, second and third laminated cup-shaped pole pieces concentrically mounted on the shaft at either end of the drum-shaped piece and outwardly facing therefrom, a common number of axially-oriented, evenly spaced teeth formed on the respective circumferences of each of the pole pieces, the teeth of the second and third pole pieces axially aligned with each other and staggered with respect to the teeth of the first pole piece, a first washer-shaped, axially-magnetized, rare earth magnet mounted concentric with the shaft and sandwiched between the first and second pole pieces, and a second washer-shaped, axially-magnetized, rare earth magnet mounted concentric with the shaft and sandwiched between the first and third pole pieces so that its magnetic field is in opposition to the field of the first magnet whereby each the magnet exerts a magnetic force of a common polarity on opposite ends of the first pole piece and an opposite polarity magnetic force on the second and third pole pieces, respectively, and a stator assembly coaxial with the rotor assembly, the stator assembly including a cylindrical stack of selectively configured internally toothed stator laminations having an axial length substantially equal to the sum of the combined axial lengths of the pole pieces and the magnets.
REFERENCES:
patent: 3148319 (1964-09-01), Fredrickson
patent: 3206623 (1965-09-01), Snowdon
patent: 3293469 (1966-12-01), Crawford et al.
patent: 3321652 (1967-05-01), Opel
patent: 3535604 (1970-10-01), Madsen et al.
patent: 3777196 (1973-12-01), Field
patent: 3956650 (1976-05-01), Field
patent: 4025910 (1977-05-01), Field
patent: 4127802 (1978-11-01), Johnson
patent: 4134054 (1979-01-01), Akamatsu
patent: 4306164 (1981-12-01), Itoh et al.
Duggan Donovan F.
Litton Systems Inc.
Ribando Brian L.
LandOfFree
Low-inertia high-torque synchronous induction motor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Low-inertia high-torque synchronous induction motor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Low-inertia high-torque synchronous induction motor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-205696