Electricity: motor control systems – Closed loop speed control system for dc motor with commutator – Armature control by digital or combined analog and digital...
Patent
1988-03-02
1989-12-12
Shoop, Jr., William M.
Electricity: motor control systems
Closed loop speed control system for dc motor with commutator
Armature control by digital or combined analog and digital...
388815, 388912, 318465, G05B 500
Patent
active
048873071
ABSTRACT:
A speed control device for an electric motor having a rotation speed and driven by a power source and including components for producing a counter value from the rotation speed of the motor, components for comparing the counter value produced from the producing components with a predetermined counter value of a designated speed and producing a deviation output counter value, components for integrating the deviation output for a predetermined period of time including a first integrating circuit for multiplying the deviation output by a predetermined value and producing a resultant and a second integrating circuit for adding a predetermined value to the resultant of the first integrating circuit and producing a resultant, and components for adding said second integrating circuit resultant to the deviation output of the comparator means so as to change the deviation output resultant counter value to a time value for controlling the motor driving power source.
REFERENCES:
patent: 4323833 (1982-04-01), Watanabe et al.
patent: 4331890 (1982-05-01), Makino et al.
patent: 4403560 (1983-09-01), Makabe et al.
patent: 4417188 (1983-11-01), Makabe et al.
patent: 4456859 (1984-06-01), Watanabe et al.
patent: 4480561 (1984-12-01), Makabe et al.
Nakamura Takashi
Orii Akira
Janome Sewing Machine Co. Ltd.
Martin David
Shoop Jr. William M.
Striker Michael J.
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