Circuit for damping hunting by electric machines

Details Circuit for damping hunting by electric machines Circuit for damping hunting by electric machines

1980-10-22

1983-07-12

Hickey, R. J.

Electricity: single generator systems

Automatic control of generator or driving means

Antihunting or rate of change

73650, 322 29, 322 58, 361 20, H02H 706, H02P 900

Patent

active

043933459

ABSTRACT:
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.

REFERENCES:
patent: 4080559 (1978-03-01), Wright et al.
patent: 4317371 (1982-03-01), Wolfinger
patent: 4329637 (1982-05-01), Kotake et al.

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