General Electric Canada, Inc.

Martin Van Duyn

John M Young

A method for facilitating damping torsional or ring vibrations of a dynamoelectric machine including a rotor assembly with a first amortisseur bar and a second amortisseur bar extending therefrom and terminating at an endring is provided. The method includes providing a damping assembly, and positioning the damping between the first amortisseur bar and the second amortisseur bar such that the damping assembly contacts the first and second amortisseur bars, and is substantially proximate the endring or alternatively the damping assembly is positioned only over one amortisseur bar.

Amortisseur vibration damper

A method of improving the airflow through a low to medium speed salient pole dynamoelectric machine DEM is disclosed. The rotor rim on which the salient poles are mounted is shortened in comparison to prior art structures so that the ends of the salient poles (and the rotor windings) protrude a substantial distance beyond the edge of the rim. A stationary or rotating shield is placed in juxtaposed relationship with the rotating ends of the salient poles to provide an enclosure so that the protruding ends of the salient poles can function as a crude radial fan.

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Peterborough, Canada

Martin Van Duyn