Siemens Aktiengesellschaft

Arnold Wichmann

Peter Grunewald

A filler-impregnatable device for a large electric machine, such as a stator or a rotor, includes a carrier body having slots formed therein defining slot walls. Conductor windings have conductor devices disposed in the slots associated therewith. Impregnatable insulating layers each surround a respective one of the conductor devices. Impregnatable first semiconductor layers each envelope a respective one of the insulating layers. At least one impregnatable second semiconductor layer is disposed between the first semiconductor layer of each respective conductor device and at least one of the slot walls of the associated slot. The at least one second semiconductor layer is electrically connected to the first semiconductor layer of each respective conductor device. Filler-permeable separating layers are each disposed between the first semiconductor layer and the at least one second semiconductor layer of each respective conductor device. The separating layers reduce but do not prevent adhesion of the first semiconductor layers to the second semiconductor layers to be provided by a filler.

Conductor winding device for a large electric machine

A method for determining overheating in liquid-cooled windings of electric machines includes acoustically monitoring cooling liquid with at least one sound pickup, and detecting noises generated by bubbles in the event of local overheating if the boiling point of the cooling liquid is exceeded. An apparatus is also provided for carrying out the method.

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Mulheim, Germany

Arnold Wichmann