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AssigneeSiemens Aktiengesellschaft
InventorsKurt Fork, Wolfgang Kaufhold, Wolfgang Meusel, Hermann Waldmann
Estimating the term…
A circuit for damping hunting oscillations of controlled electric machines. The circuit is provided with a measuring circuit for determining the hunting oscillations and an identifier circuit for determining the angle components of such hunting oscillations. A phase shifter circuit is provided for receiving the angle components produced by the identifier circuit and forming a hunting oscillation correction signal which is shifted in phase from the hunting oscillations by a predetermined phase angle. The hunting oscillation correction signal is conducted to a control unit of the electric machine. The invention is particularly useful in damping hunting by the rotors of voltage controlled synchronous generators.
A circuit for damping hunting oscillations of a controlled electric synchronous machine of the type having a rotor and a stator, the circuit being of the type which determines the hunting oscillation and combines a phase-shifted oscillation correction signal with a control signal of the circuit, the circuit further comprising:
The circuit of claim 11 wherein said identification circuit means comprises a power measuring circuit for measuring electrical power related to the controlled electric machine.
Dependencies are inferred from the claim text.