Economical wide range speed control system

Details Economical wide range speed control system Economical wide range speed control system

1994-11-14

1997-06-24

Cabeca, John W.

Electricity: motor control systems

Closed loop speed control system for dc motor with commutator

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

318600, 318608, 395 21, 388813, G05B 1940

Patent

active

056424612

ABSTRACT:
A speed control system is disclosed wherein a brushless DC motor and a magneto resistive encoder are able to rotate a motor at arbitrarily low speeds. The motor is able to rotate at low speeds by having a filtered signal generated by an encoder applied to its inputs. The encoder is coupled to a series of filters which remove DC level and harmonic distortions from the resulting encoder signal. These filtered signals are then applied to the motor to control motor rotation speed.

REFERENCES:
patent: 3936710 (1976-02-01), Tanikoshi
patent: 4990838 (1991-02-01), Kawato et al.
patent: 5250890 (1993-10-01), Tanamachi et al.
patent: 5297015 (1994-03-01), Miyazaki et al.
patent: 5365158 (1994-11-01), Tanaka et al.
patent: 5424960 (1995-06-01), Watanabe et al.

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