Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1978-05-11
1980-01-22
Duggan, Donovan F.
Electrical generator or motor structure
Dynamoelectric
Rotary
310156, 310266, H02K 710
Patent
active
041852150
ABSTRACT:
A subfractional horsepower permanent magnet synchronous motor comprises an annular stator and a cup-form permanent magnet rotor defining an internal cylindrical volume. The rotor is supported for rotation within the stator about the axis of the motor and with an annular air gap between the stator and the cup-form rotor, and means including a stator coil is adapted to be energized to rotate the rotor relative to the stator. An output shaft coaxial with the rotor extends outwardly from one end of the stator, and a stationary support bushing for the output shaft extends into the internal volume defined by the rotor. A gear train is mounted in the space between the inward end of the support bushing and the closed end of the cup-form rotor, and is coupled between the rotor and the output shaft to provide a predetermined speed reduction ratio between the rotor and the output shaft. The gear train comprises at least three gear members, a first gear member cantilever mounted from the stationary support bushing, a second gear member cantilever mounted from the closed end of the cup-form rotor, and a third gear member mounted from said output shaft, one of the gear members comprising a cluster of two gears mounted in offset relation to the output shaft and the other two gear members being coaxial with the output shaft.
REFERENCES:
patent: 1118616 (1914-11-01), Apple
patent: 1442217 (1923-01-01), H'Doubler
patent: 2316122 (1943-04-01), Nardone
patent: 2450290 (1948-09-01), Maxwell
patent: 3008061 (1961-11-01), Mims et al.
patent: 3146363 (1964-08-01), Sidell et al.
patent: 3231770 (1966-01-01), Hyde
patent: 3508091 (1970-04-01), Kavanaugh
patent: 3633055 (1972-01-01), Maier
patent: 3646375 (1972-02-01), Mader
patent: 3812928 (1974-05-01), Rockwell et al.
Duggan Donovan F.
General Scanning Inc.
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