Subway electric motor and fan construction

Details Subway electric motor and fan construction Subway electric motor and fan construction

1983-01-12

1986-03-04

Bonck, Rodney H.

192 clutches and power-stop control

Clutches

Fluent material

192 82T, 310 62, F16D 3100, H02K 906

Patent

active

045735590

ABSTRACT:
An electric motor construction particularly for subway train electric motors which utilize fan induced air cooling to cool the motor windings. The invention exhibits utility in saving power to drive the fan. The fan is coupled to the motor armature by a fluid coupling. The fluid coupling is so constructed that at relatively high temperatures the torque delivered to the fan by the motor armature does not increase proportionally or correspondingly as at relatively low rotor speeds. On one embodiment, a fluid coupling utilizing variation of shear liquid viscosity with both temperature and shear rate is employed. In a second embodiment, the amount of fluid in the fluid coupling is varied with variations in temperature.

REFERENCES:
patent: 2086306 (1937-07-01), Sessions
patent: 2699846 (1955-01-01), Pitman et al.
patent: 2922098 (1960-01-01), Hutson
patent: 2948268 (1960-08-01), Roper et al.
patent: 3559786 (1971-02-01), Long
patent: 3670190 (1972-06-01), Goebel
patent: 3725706 (1973-04-01), Lukens
patent: 4064980 (1977-12-01), Tinholt
patent: 4110643 (1978-08-01), Muller
patent: 4311937 (1982-01-01), Clark

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