Method and an apparatus for controlling a.c. rotating machinery

Details Method and an apparatus for controlling a.c. rotating machinery Method and an apparatus for controlling a.c. rotating machinery

1983-07-27

1985-09-24

Shoop, Jr., William M.

Electricity: motive power systems

Generator-fed motor systems having generator control

Generator field circuit control

318140, 318149, H02P 774

Patent

active

045435138

ABSTRACT:
The control of a quantity (voltage, phase) relating to a generator-motor pair in an electric power station is accomplished by generating a pulse sequence associated with the quantity to be controlled, generating a predetermined reference pulse sequence and detecting the relative phase shift between the two pulse sequences. This phase shift, or an integrated value of a number of successive phase shifts, controls a double ramp generator, the sign and slope of which are proportional to the detected phase shift. The integrated signal is employed to vary the magnetic induction of the rotor, i.e., field excitation of the generator, to balance the system.

REFERENCES:
patent: 3436633 (1969-04-01), Hemmenway et al.
patent: 3470434 (1969-09-01), Caputo
patent: 3532950 (1970-10-01), Jackson
patent: 3931555 (1976-01-01), Dohanich et al.
patent: 4179729 (1979-12-01), Stanton et al.

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