General Electric Canada, Inc.

Robert Edward Draper

Konrad Roman Weeber

Robert Henry Rehder

Bernard John Moore

Michael Beapre

Michael Stutt

A Karim Younsi

G Paul Jones

David A Snopek

Luc Jean Lafortune

A groundwall insulation system for use in dynamoelectric machines carrying voltage above 4 kV, and preferably in the order of 13.8 kV, or higher has two layers of insulation wound onto the conductors of the high voltage winding. The first layer of insulation has a first permittivity that is greater then the permittivity of the second layer of insulation wound onto the first layer of insulation. As a consequence, at the juncture between the first and second layers there is a sharp increase in the electric field profile as seen through the groundwall insulation.

Graded electric field insulation system for dynamoelectric machine

A sandwich type insulation for electrical machinery comprising a laminate of a polymeric material such as polyimide which contains particles of an inorganic corona resistant material, said polymeric material being bonded to mica paper consisting of mica, wherein said mica paper may be impregnated with polymeric resin containing particles of inorganic corona resistant material. The resultant insulation may be used as a tape or wrapper.

Sandwich insulation for increased corona resistance

An insulation system for the windings of a dynamoelectric machine is described wherein a bundle of insulated conductors is provided with layers of groundwall insulation. The innermost layer of groundwall insulation has superior corona discharge resistant properties. A second layer of groundwall insulation which has a corona discharge resistance somewhat less than the innermost layer of groundwall is superimposed on the innermost layer.

Multi-layer insulation for winding elements of dynamoelectric machines

Growing community of inventors

Peterborough, Canada

Robert Edward Draper