Cooling device for use in a low inertia electric motor

Details Cooling device for use in a low inertia electric motor Cooling device for use in a low inertia electric motor

1975-10-14

1977-08-02

Skudy, R.

Electrical generator or motor structure

Dynamoelectric

Rotary

310154, H02K 900

Patent

active

040398714

ABSTRACT:
A cooling device for use in a low inertia electric motor, in which there are provided a plurality of main passages for cooling air, around the outer circumferential surface of a cylindrical armature which surface is surrounded by magnetic pole pieces with gaps left therebetween. The main passages extend in the axial direction of the armature, so that cooling air is introduced under pressure from the ends of the aforesaid main passages on one side and then discharged from the other ends of the main passages, so as to cool the outer circumferential surface of the armature. At least half of those main passages are of such an arrangement that the cross sectional areas of the main passages are gradually varied from inlets of the main passages towards the outlets thereof, respectively so that a circumferential flow of air through said gaps is created.

REFERENCES:
patent: 2338593 (1944-01-01), Mortensen
patent: 2492753 (1949-12-01), Linville
patent: 3250933 (1966-05-01), Edick
patent: 3588556 (1971-06-01), Guzman
patent: 3665230 (1972-05-01), Wallenstein
patent: 3831045 (1974-08-01), Anisimov
patent: 3906265 (1975-09-01), Giles

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