Automatic residual phase error compensation circuit for a digita

Details Automatic residual phase error compensation circuit for a digita Automatic residual phase error compensation circuit for a digita

1979-08-28

1981-08-11

Dobeck, B.

Electricity: motive power systems

Positional servo systems

Frequency- or phase-modulated systems

318314, 318632, G05B 101

Patent

active

042836719

ABSTRACT:
A digital servo control system for controlling a drive motor accumulates speed and phase error numbers and produces a pulse width modulated signal in response thereto. Phase errors are measured by counting pulses of a clock signal between the arrival of a position signal related to a rotational position of the drive motor and the arrival of a reference signal. An automatic residual error compensating circuit controls a delay applied to the position signal in accordance with residual phase error to minimize the same.

REFERENCES:
patent: 3654479 (1972-04-01), Catherin
patent: 3778693 (1973-12-01), Korteling
patent: 3872369 (1975-03-01), Rich
patent: 4061950 (1977-12-01), Kayanuma
patent: 4177411 (1979-12-01), Takaoka

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