Electricity: electrical systems and devices – Electrical speed signal processing systems – With speed comparison
Patent
1976-02-20
1977-12-13
Pellinen, A. D.
Electricity: electrical systems and devices
Electrical speed signal processing systems
With speed comparison
G05D 1362
Patent
active
040633047
ABSTRACT:
Method and apparatus of controlling the revolving speed of a rotary body to be rotated at the predetermined number of revolution corresponding to the reference or first signal F.sub.1. The rotary body equipped with an alternating current generator which generates a frequency signal or third signal F.sub.3 in proportion to the number of revolution thereof. During operation, the signal F.sub.3 being compared with the signal F.sub.1, if the deviation of the signal F.sub.3 from the signal F.sub.1 is within tolerance, a second variable signal F.sub.2 is swept to coincide the same with the signal F.sub.3 and further to coincide with the first signal F.sub.1 while maintaining the coincidence of the second and third signals thereby to resume the number of revolution of the rotary body to that corresponding to the reference signal.
REFERENCES:
patent: 3983954 (1976-10-01), Noddings et al.
Niimi Toshio
Ogura Junshiro
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