Method of and apparatus for digitally setting a control frequenc

Details Method of and apparatus for digitally setting a control frequenc Method of and apparatus for digitally setting a control frequenc

1988-04-15

1989-07-25

Heyman, John S.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

328140, 307271, 377 47, 377 52, H03B 1900, H03K 500

Patent

active

048517836

ABSTRACT:
A method of and an apparatus for generating a control frequency in which two submultiples of a frequency standard are obtained which differ by unity in the respective frequency division and are mixed so that the contribution of a prior control frequency is reduced form period group to period group while the contribution of the new control frequency is increased from period group to period group. The system provides fine control of frequencies for, for example, driving synchronous motors without requiring excessively high frequency standard oscillators.

REFERENCES:
patent: 3999049 (1976-12-01), Roche et al.
patent: 4075544 (1978-02-01), Leenhouts
patent: 4325031 (1982-04-01), Ooms et al.

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