Speed controller

Details Speed controller Speed controller

1989-03-14

1989-11-07

Dobeck, Benjamin

Electricity: motor control systems

Closed loop speed control system for dc motor with commutator

Armature control by digital or combined analog and digital...

388904, 388909, 388912, 388916, 388921, H02P 516

Patent

active

048797545

ABSTRACT:
The invention provides a speed controller which detects the period of an AC signal containing information of the rotational speed of a motor and controls the rotational speed based on the detected period value and a reference speed value. More particularly, the speed controller computes the amount of the deviation of the AC signal based on continuously detected period values and the reference speed value, and then stores the computed deviation amount in a memory as a correction value. Using the correction value stored in the memory, the speed controller corrects the deviation of the period, and thus, the speed of the rotation of the motor can be controlled with extremely high precision.

REFERENCES:
patent: 4283671 (1981-08-01), Nakano et al.
patent: 4371819 (1983-02-01), Kaufmann
patent: 4488096 (1984-12-01), Cap et al.
patent: 4628314 (1986-12-01), Morinaga et al.
patent: 4675585 (1987-06-01), Krueger et al.
National Technical Report, p. 614, vol. 33, No. 5, Oct. 1987.

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