Servo system

Details Servo system Servo system

1985-10-09

1987-01-13

Shoop, Jr., William M.

Electricity: motive power systems

Braking

Automatic and/or with time-delay means

318341, 318608, 318605, 318661, 318603, H02P 500

Patent

active

046366962

ABSTRACT:
A servo system for controlling the rotational speed of a rotating body or the moving speed of a moving body to be a desired speed. The system comprises a voltage source which generates at least two predetermined voltages, a comparator which compares a voltage of an AC signal containing a speed information of the moving body with each of the voltages generated by the voltage source and outputs at least two output signals in each half period of the AC signal, a counter for counting reference clock signals, a memory for storing a count value of the counter when the comparator outputs each of the output signals, a processor for producing a speed error signal from the count value stored in the memory, and a driver for supplying a driving power to the moving body in accordance with the speed error signal thereby to keep a desired speed of the moving body. Further, an error compensator may be provided for compensating a voltage shift of the predetermined voltages.

REFERENCES:
patent: 4529922 (1985-07-01), Ono

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