Electricity: single generator systems – Automatic control of generator or driving means – Power factor or phase relationships
Patent
1978-03-28
1981-01-13
Hickey, Robert J.
Electricity: single generator systems
Automatic control of generator or driving means
Power factor or phase relationships
322 24, 322 25, 322 27, 307 84, H02P 914
Patent
active
042451825
ABSTRACT:
A field control apparatus for a generator having a field winding comprises a terminal voltage control unit for controlling a field current of the generator in accordance with a difference between a terminal voltage signal of the generator and a reference voltage signal, which control unit has at least one of a line drop compensation function, an under-excitation limitation function, an over-excitation limitation function, a power factor regulation function, an armature winding over-current compensation function and a cross-current compensation function. The field control apparatus includes a detector as a common signal source for detecting active power and reactive power components at an output terminal of the generator and means responsive to the output of the detector for performing scalar operation in accordance with a function of the added compensation/control function described above. An output of the operating means is added to the differential signal as an added function signal to control the field current for excitation of the field winding.
REFERENCES:
patent: 3634750 (1972-01-01), Bobo
patent: 3656048 (1972-04-01), Hauf
patent: 3737760 (1973-06-01), Kiwaki et al.
patent: 3996507 (1976-12-01), Chambers
patent: 4044296 (1977-08-01), Dhyanchand et al.
Aotsu Hiroaki
Goto Masuo
Isono Akira
Kai Takaaki
Kaihara Akihisa
Hickey Robert J.
Hitachi , Ltd.
Hitachi Engineering Co. Ltd.
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