Frequency control for paralleled AC systems

Details Frequency control for paralleled AC systems Frequency control for paralleled AC systems

1979-05-25

1981-12-29

Hix, L. T.

Electrical transmission or interconnection systems

Plural supply circuits or sources

Connecting or disconnecting

307153, 318 66, 322 32, H02J 342

Patent

active

043084656

ABSTRACT:
A frequency control utilizing a reference oscillator and a signal controlled oscillator is disclosed. The frequency control maintains the frequency of an output signal at the same frequency as the reference oscillator if there is no signal present at a frequency control input. A signal at the frequency control input causes the frequency of the output signal to be varied accordingly. The frequency control contains a feedback loop which compares the output of the signal controlled oscillator with the fixed frequency of the output of the reference frequency oscillator. The frequency control of the present invention has particular applicability as a frequency control for parallel-connected AC systems.

REFERENCES:
Parallel Operation of Aircraft Alternators Using Electronic Frequency Changes, Bowles & Nims, AIEE Technical Paper 47-5, Oct. 1946, pp. 1-19.

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