General Electric Company

Klaus Werner Sommerlatte

Apostolos Pavlos Karafillis

Eric Steven Buskirk

James F Hopeck

Siddharth Navinchandra Ashar

Benjamin Alber Mancuso

Steven L Adams

Alexander Gabriel Beckford

Kena Kimi Yokoyama

David Norwood Dorsey

Anthony Rigosu

Steven William Jones

Patrick Brian Douglass

Marcus Edward Harrington

A solution is provided for tuning the frequency of a torsional mode of interest of a rotating body (such as a generator rotor torsional mode) by adding a detuner to act as an undamped torsional vibration absorber. The detuner may be coupled to an overhung shaft extending from the rotating body. The detuner may be modular, therefore weight can be added or subtracted easily from the detuner in order to adjust the stiffness and/or inertia of the overhung shaft. This change in stiffness and/or inertia yields a torsional frequency of oscillation in the overhung shaft substantially similar to the natural frequency of the torsional mode of interest of the rotating body, therefore forcing the frequency of the torsional mode of interest of the rotating body above or below its torsional natural frequency.

Detuner for tuning torsional mode of a rotating body

A method to replace a brushless exciter with a static excitation system for a generator including the steps of: measuring a plurality of dimensions of the brushless exciter; determining a rotational mass moment of inertia of a rotation portion of the excitation system design; forming a rotating static excitation system having substantially the same rotational mass moment of inertia as the brushless exciter; removing the brushless exciter from the generator, and attaching the static excitation system to the generator.

Method for matching a collector to replace a brushless exciter in a turbine generator drive train

A connector support block has a recess defined in part by an arcuate surface for limiting deflection of a main lead connector coupled between the main lead terminal and the innermost turn of end coils on a generator. The recess is spanned by a pin displaceable in elliptical openings in flanges defining the recess and about which pin the main lead connector makes a 180.degree. bend. By limiting the deflection of the main lead connector, stresses introduced into the main lead connector at the 180.degree. bend, a 90.degree. bend and the joint between the main lead connector and innermost turn are reduced under cyclic loading whereby increased fatigue life of the main lead connector is provided.

Connector support block for limiting deflection of a main lead connector

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Guilderland, NY, United States of America

Klaus Werner Sommerlatte