Impregnatable configuration of a carrier body and winding elements

US5574325A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Rudolf von Musil
• Wolfgang Schier · Mülheim, DE
• Gunter Kremser · Mülheim, DE
• Norbert Didzun · Mülheim, DE
• Rainer Muller · Penzberg, DE
• Ferdinand Stobbe · Mülheim, DE

Key dates

• Filing date: Mar 14, 1994
• Grant date: Nov 12, 1996
• Expiry date: Mar 14, 2014

Classification

• Technology area (CPC H): Electricity
• CPC primary: H02K3/48
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

A configuration, which may be part of a heavy-duty dynamoelectric machine, in particular a stator, being impregnated with a filler such as a cured epoxy resin, includes a ferromagnetic and electrically conductive carrier body having grooves formed therein defining groove walls, and winding elements disposed in the grooves. Each of the winding elements has an electrically highly conductive basic unit, an impregnatable insulating sleeve surrounding the basic unit, and an electrically weakly conductive, impregnatable protective layer enveloping the insulating sleeve. Impregnatable separating layers are each disposed between a respective one of the winding elements and at least one of the groove walls of a respective one of the grooves. The separating layers are substantially formed of laminated mica sheets resting flat between the winding element and the groove wall. A multiplicity of electrically weakly conductive bridges electrically connects the protective layer through the separating layer to the groove wall. The winding elements may be winding rods.