Voltage regulator with maximum current limit

Details Voltage regulator with maximum current limit Voltage regulator with maximum current limit

1985-07-12

1986-01-28

Hickey, R. J.

Electricity: single generator systems

Automatic control of generator or driving means

Plural conditions

322 73, H02P 930

Patent

active

045674221

ABSTRACT:
In a voltage regulator for a generating system having a main generator and an exciter, the exciter providing field current to the main generator, it is desirable to provide a maximum current limit on the generator output which also allows the voltage regulator to maintain excitation during a fault condition. The voltage regulator of the present invention includes a maximum current limit circuit which detects not only a high current condition, but also the number of phases in a polyphase generator output in a fault condition. The voltage regulator thereby limits the maximum current each type of fault can produce, thus providing highly desirable system characteristics for clearing faults, tripping circuit breakers and prolonging generator life.

REFERENCES:
patent: 3209233 (1965-09-01), Reuther
patent: 3484704 (1969-12-01), Hungerford
patent: 3564391 (1971-02-01), Dinger
patent: 4044296 (1977-08-01), Dhyanchand et al.
patent: 4322630 (1982-03-01), Mezera et al.
patent: 4326159 (1982-04-01), Aotsu et al.
patent: 4403292 (1983-09-01), Ejzak et al.
patent: 4442396 (1984-04-01), Hucker
patent: 4477765 (1984-10-01), Glennon et al.

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