Excitation control for wound field synchronous...

Details Excitation control for wound field synchronous... Excitation control for wound field synchronous...

2007-09-11

2007-09-11

Schuberg, Darren (Department: 2834)

Electricity: single generator systems

Generator control

With excitation winding and/or circuit control

C322S075000, C322S089000, C322S095000, C322S044000, C322S068000, C290S031000, C290S00400D, C290S052000, C290S046000

Reexamination Certificate

active

11438612

ABSTRACT:
A wound field synchronous (WFS) dynamoelectric machine comprises: a rotor assembly; an exciter generator section comprising a stationary multiphase exciter stator winding for receiving excitation power from a multiphase alternating current (AC) source to generate an exciter stator magnetic field, a multiphase exciter rotor winding in the rotor assembly for generating multiphase AC excitation power as it cuts through the exciter stator magnetic field and a rotating rectifier assembly in the rotor assembly for converting the multiphase AC excitation power to direct current (DC) excitation power; a synchronous machine section comprising a DC main rotor winding in the rotor assembly for generating a main rotor magnetic field and a stationary multiphase main stator winding for receiving a multiphase AC control signal to generate a rotating main stator magnetic field that interacts with the main rotor magnetic field to rotate the rotor assembly; and an impedance that selectively connects one phase of the exciter stator winding to another phase of the exciter stator winding that disconnects from the multiphase AC current source above a predetermined rotational speed of the rotor assembly.

REFERENCES:
patent: 6909263 (2005-06-01), Xu et al.
patent: 6979979 (2005-12-01), Xu et al.
patent: 7078826 (2006-07-01), Xu et al.
patent: 7154249 (2006-12-01), Velhner et al.

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