Hermetic motor driven fluid apparatus having improved insulating

Details Hermetic motor driven fluid apparatus having improved insulating Hermetic motor driven fluid apparatus having improved insulating

1995-05-30

1998-05-05

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 88, H02R 1514

Patent

active

057479054

ABSTRACT:
An improved electrical insulation structure is provided for a motor driven fluid apparatus having the compression and drive mechanisms within a hermetically sealed housing. The drive mechanism comprises a drive shaft operatively connected to the compression mechanism and a motor for rotating the drive shaft. The motor comprises a rotor fixedly surrounding the drive shaft and a stator assembly surrounding the rotor with a small radial air gap therebetween. The stator assembly comprises an annular magnetic core fixedly secured to the housing. The core has a plurality of axially extending slots and a plurality of windings, each having a plurality of coils formed by multiple turns of an enamel-coated conductor. The multiple turns of the conductor have side turn portions which are disposed within the axially extending slots and end turn portions which axially project from the slots and are generally disposed about the axial end surfaces of the core. The connection points between the windings themselves, and between the windings and conductor leads, are fixedly covered with a film of insulating material, such as epoxy resin. Alternatively, a portion of the surface of the housing is fixedly covered with a film of insulating material, such as aluminum oxide formed by anodization.

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Alan J. Taylor et al., "Developments In Covered Conductors," BEAMA Electrical Insulation Conference pp.1-13, Apr. 1970.

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