Abb Research Ltd.

Alstom

Alstom Technology Limited

Reinhard Joho

Thomas Baumann

J&ouml;rg Oesterheld

Reinhard Fried

Albrecht Bock

Jens Von Wolfersdorf

Stephan Hess

Hans Zimmermann, Deceased

Hans Zimmermann

a high-voltage generator, notches ( ) leading radially inward are provided in each segmental lamination ( ) on the radial outside of the laminated stator body and end in a relief opening. The notches ( ) cause the amplitude and the frequency of, for example, a 4-node vibration occuring during operation to be limited to noncritical values, although the laminated body is undersized mechanically with regard to its yoke height (J ).

Laminated stator body for an electrical machine

A winding bar ( ) for a high-voltage winding, for example a stator winding of an electric machine, includes a plurality of conductors ( ) which are arranged above and/or next to one another in a conductor bundle. The conductor bundle has a rectangular cross section. The conductor bundle is surrounded by an insulation ( ). An overall improved electric strength is achieved at the edges without changing the insulation thickness because a thickness (d ) of the insulation ( ) on the edges ( ) of the winding bar ( ) is greater than the thickness ( ) of the insulation ( ) on the flat sides of the winding bar ( ). Preferably, a calibration process is used to shape the edge region.

Winding bar for the high-voltage winding of an electric machine, and a method for producing such a winding bar

In an elastic insulating material element for wedging a winding, in particular the stator winding, of an electric machine in the slots provided for this purpose in a laminated body, good mechanical and, at the same time, electric properties are achieved in that the insulating material element (,) has a striplike metal spring core (,) which is surrounded on all sides by a casing (,) made of an insulating material.

Elastic insulating material element for wedging a winding, in particular the stator winding, of an electric machine

In a turbo-generator (10) having a rotor (11) and a stator (12) concentrically surrounding the rotor (11) and separated from the rotor (11) by an air gap (14), and also having a cooling arrangement in which a main fan (33) draws in a gaseous cooling medium flowing through corresponding cooling passages in the rotor (11) and in the stator (12) and forces it through a cooler (22, 23, 24) back into the cooling passages, the cooling medium flowing through the rotor (11) in the axial direction, issuing in a heated state into the air gap (14) and being returned from the air gap (14) to the main fan (33), improved rotor cooling is achieved in that the cooling medium heated by the rotor (11) is directed radially outward from the air gap (14) through outflow passages (15) in the stator (12) and is returned to the main fan (33) outside the stator (12) via a cooling-air return (21).

Turbo-generator

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Küttigen, Switzerland

Reinhard Joho