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US 5,294,857 AGranted
Synchronous machine having control coils for compensating mechanical oscillations of the rotor
AssigneeSiemens Aktiengesellschaft
InventorsHerbert Auinger, Hermann Waldmann
Life of this patent
Estimating the term…
Abstract
In order to compensate for the effects of mechanical oscillations of the salient pole rotor in a synchronous machine in a simple manner, control coils are provided which generate a controllable quadrature-axis magnetic field. The control coils are arranged on the salient pole rotor in such a way that the quadrature-axis magnetic field generated by the control coils is superimposed in the air gap on the controllable direct-axis magnetic field generated by exciting coils enclosing each pole body of the salient pole rotor.
Claims16
A synchronous machine, comprising:
- a salient pole rotor including a plurality of individual poles, each pole comprising a pole body, and a pole shoe, each pole shoe comprising first and second halves;
- a plurality of exciting coils, each of said exciting coils encircling one of said individual poles in said salient pole rotor, each of said exciting coils capable of conducting electric current and generating a controllable direct-axis magnetic field, and
- a plurality of control coils, each of said control coils coupled within poles shoes of adjacent individual poles in said salient pole rotor, each of said control coils capable of conducting electric current and generating a controllable quadrature-axis magnetic field, quadrature-axis and direct-axis magnetic fields flow in equivalent directions over the first half of each of said pole shoes and in opposite directions over the second half of each of said pole shoes.
Dependencies are inferred from the claim text.