Electric motor with shrouded fan

Details Electric motor with shrouded fan Electric motor with shrouded fan

1986-04-25

1987-06-02

Salce, Patrick R.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 60R, 310 68D, 416182, H02K 906

Patent

active

046706771

ABSTRACT:
An electric motor has stator coils extending longitudinally past an end of its rotor so that the end turns and at least a portion of the inner side of the stator coils are exposed. A fan is disposed inside the motor shell between a first air passageway and the stator coils. The fan is secured to and driven by the rotor shaft to cause a flow of cooling air to pass over the stator coils when the motor is in operation. The fan has a number of vanes extending outwardly from a hub to a circumferential ring, which ring defines a central opening of the fan. The central opening extends past the vanes from the front to the rear of the fan so that the rear of the fan is relatively open. The inner surface of the ring is smoothly curved outwardly and rearwardly from the front of the central opening to direct air which enters the central opening toward the stator coils. The vanes are disposed adjacent the exposed portions of the stator coils to cause turbulent air flow along the exposed portions.

REFERENCES:
patent: 1986867 (1935-01-01), Walsh
patent: 3512024 (1970-05-01), Papa
patent: 3648086 (1972-03-01), Renner et al.
patent: 3916231 (1975-10-01), Cathey
patent: 4492885 (1985-01-01), Kitamura et al.

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