Electricity: motive power systems – Positional servo systems – Digital or numerical systems
Patent
1981-03-10
1983-03-15
Dobeck, B.
Electricity: motive power systems
Positional servo systems
Digital or numerical systems
318318, 318607, G05B 1928
Patent
active
043769144
ABSTRACT:
A motor control device is disclosed. The device comprises an electric motor, a first counter for counting clock signals having a certain frequency, means for resetting the first counter by an output corresponding to a rotational frequency of the motor and storing a counted content of the first counter immediately before the reset, a second counter for counting clock signals having a certain frequency higher than the above clock signal, and means for comparing the content of the first counter with that of the second counter, resetting the second counter by a coincidence of both the contents, generating output signals from the reset the second counter to the reset of the first counter, and controlling a rotational frequency of the motor by the output signals.
REFERENCES:
patent: 3675107 (1972-07-01), Barber
patent: 3742326 (1973-06-01), Okuda et al.
patent: 4023085 (1977-05-01), Bishop et al.
patent: 4264850 (1981-04-01), Cannon et al.
patent: 4287461 (1981-09-01), Promis et al.
Dobeck B.
Olympus Optical Company Ltd.
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