Air-cooled type electric motor

Details Air-cooled type electric motor Air-cooled type electric motor

1997-06-13

1998-07-14

Dougherty, Thomas M.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 62, 310 63, 310 89, H02K 132, H02K 906

Patent

active

057809461

ABSTRACT:
An air-cooled type electric motor (20) includes a rotor, a stator includes a stator core (28), and a front support member (32) and a rear support member (34) arranged at both axial ends of the stator core (28). A plurality of air passages (42), extending continuously in an axial direction, are provided in the stator core (28), the front support member (32), and the rear support member (34). A centrifugal blower unit (50) is placed at further rear side of the rear support member (34). Because the centrifugal blower unit (50) has a large pressure rise, air, surrounding the motor and sufficient to cause an effective cooling, can be made to flow into the air passages (42) with a smaller diameter. A drive section (56) of the blower unit (50) is fixed directly to the rear support member (34) by bolts (72). Consequently, an electric wire (74) for the drive section (56) extends through the interior space of the motor (20), and is connected to a terminal box (48). In this manner, the blowing capacity, and the moisture-proofing of the terminal box, can be improved.

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patent: 4566864 (1986-01-01), Yamamoto et al.
patent: 5144175 (1992-09-01), Craggs

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