Electricity: motor control systems – Closed loop speed control system for dc motor with commutator – Armature control by digital or combined analog and digital...
Patent
1992-04-06
1995-02-07
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...
388814, 388903, 388930, 318139, H02P 517
Patent
active
053881761
ABSTRACT:
A speed controller for a DC motor minimizes speed droop and load droop through pulse width or frequency modulation. The controller provides an extra power increase upon engine starting or whenever a heavier load is temporarily encountered. The control circuit also has a current limiter, overload indicators, and a battery recharger. The controller is very inexpensive, primarily because all of the timing components are contained on a single integrated circuit timer chip such as a 556 timer. The controller contains other features, including a circuit for limiting the pulse width of the control signal from the pulse width modulator.
REFERENCES:
patent: 3719876 (1973-03-01), Miller
patent: 3983464 (1976-09-01), Peterson
patent: 4011491 (1977-03-01), Grover et al.
patent: 4162436 (1979-07-01), Waldorf et al.
patent: 4384241 (1983-05-01), Stillhard
patent: 4480216 (1984-10-01), Nakajima
patent: 4694228 (1987-09-01), Michaelis
patent: 4734629 (1988-03-01), Lessig, III et al.
patent: 4765426 (1988-08-01), Shimizu
patent: 4791544 (1988-12-01), Gautherin et al.
patent: 4905300 (1990-02-01), Bhagwat et al.
patent: 4910447 (1990-03-01), Masters
patent: 5017854 (1991-05-01), Gully et al.
patent: 5063338 (1991-11-01), Capel et al.
patent: 5087865 (1992-02-01), Nelson
patent: 5138249 (1992-08-01), Capel
Sears Owner Manual, 18-Inch Electric Lawnmower With Clip Handle, Dec. 19, 1990.
Black & Decker Cordless Power Mower Instruction Manual, Feb. 1991.
Dykstra Richard A.
Mitchell Robert K.
Briggs & Stratton Corp.
Martin David
Shoop Jr. William M.
LandOfFree
DC motor speed control system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with DC motor speed control system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and DC motor speed control system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1116029