Electricity: motor control systems – Closed loop speed control system for dc motor with commutator
Patent
1998-10-12
2000-05-16
Nappi, Robert E.
Electricity: motor control systems
Closed loop speed control system for dc motor with commutator
417 22, H02P 500
Patent
active
060647973
ABSTRACT:
A rotation control for a device to be rotated includes a variable speed DC motor having a constant rotational speed upon receiving a selected fixed voltage electrical input power from an adjustable electrical input power supply connected to the motor for supplying the selected fixed voltage. A switch circuit is connected between the motor and the power supply activatable in response to a first electrical signal to turn the motor "on" and activatable in response to a second electrical signal to turn the motor "off". A selectable frequency, regular interval electrical signal device is connected to the switch circuit to provide electrical signals to activate the switch circuit to turn the motor "on" at regular intervals. An encoder wheel is coupled to the device to be rotated and to the motor for rotation of the timing disk at a speed proportional to the constant rotational speed of the motor. The timing disk has a plurality of openings around the disk with predetermined spacing there between. The spacing corresponds to a desired amount of device rotation. A light sensor is operatively positioned adjacent to the encoder wheel for detecting the spaced openings and connected to the switch circuit to provide the electrical signal to turn the motor off each time a next one of the openings is detected by the sensor thereby allowing the device to traverse the desired amount of device rotation during each regular interval that the motor is turned on.
REFERENCES:
patent: 3368134 (1968-02-01), Mead, Jr. et al.
patent: 4277226 (1981-07-01), Archibald
patent: 4443216 (1984-04-01), Chappell
patent: 4496351 (1985-01-01), Hillel et al.
patent: 4561830 (1985-12-01), Bradley
patent: 4565542 (1986-01-01), Berg
patent: 4596550 (1986-06-01), Troutner
patent: 4601702 (1986-07-01), Hudson
patent: 5261877 (1993-11-01), Fine et al.
patent: 5279556 (1994-01-01), Goi et al.
patent: 5370612 (1994-12-01), Maeda et al.
patent: 5457373 (1995-10-01), Heppe et al.
patent: 5554013 (1996-09-01), Owens et al.
patent: 5645531 (1997-07-01), Thompson et al.
Copp Harry C.
Crittendon Joe C.
Harrison David J.
Stavely Roberta
B. Braun Medical Inc.
Duda Rina I.
Montgomery John W.
Nappi Robert E.
LandOfFree
Volumetric flow equalizing drive control wheel does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Volumetric flow equalizing drive control wheel, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Volumetric flow equalizing drive control wheel will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-266055