Kraftwerk Union Aktiengesellschaft

Joachim Boer

Heinrich Beermann

Georg Frankenhauser

Apparatus for fastening an air gap winding for electric machines having a large power rating, such as turbo generators, including a stator lamination stack formed of magnetic lamination segments, a mounting body formed of non-magnetic lamination segments having teeth with slots formed therebetween, the mounting body being welded at a seam to the stator lamination stack to form common lamination segments, winding bars being held in the slots and extending beyond the teeth into the mechanical air gap, pressure strips disposed in longitudinal direction of the slots pretensioning the winding bars in radial direction, clamping screws being radially disposed in the vicinity of the slot teeth and holding the pressure strips, and abutments anchoring the clamping screws in the vicinity of the stator lamination stack.

Apparatus for fastening an air gap winding

Apparatus for cooling lamination stacks of electric machines comprising an enclosure for receiving cooling gas, the enclosure being disposable around a lamination stack and being formed with a plurality of gas inlet chambers, means for circulating cooling gas through the chambers and through a plurality of axially spaced cooling channels formed in the lamination stack, and an additional gas inlet chamber located at an end of the lamination stack for receiving the cooling gas in parallel with the plurality of chambers and for directing the cooling gas over the end of the lamination stack.

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Mulheim an der Ruhr, Germany

Joachim Boer