Electricity: motor control systems – Closed loop speed control system for dc motor with commutator – Armature control by digital or combined analog and digital...
Patent
1994-02-28
1996-07-23
Martin, David S.
Electricity: motor control systems
Closed loop speed control system for dc motor with commutator
Armature control by digital or combined analog and digital...
388815, 388902, 3889075, H02P 517
Patent
active
055398529
ABSTRACT:
A method for controlling the speed of a motor for a tape drive in a mailing machine includes providing an optical sensor for signaling the appearance of slots in a slotted wheel connected to the motor shaft. The time intervals between slots are used to make a prediction in respect of expected future time intervals and the motor speed is adjusted in accordance with the predicted value to obtain the desired value. For best results, the data is received at the microprocessor using the "capture" mode of operation in order to avoid excessive errors due to a "busy" processor. The invention enables the small motor of a tape drive to avoid over and undershoot even when operating under highly variable load conditions.
REFERENCES:
patent: 4513381 (1985-04-01), Houser et al.
patent: 5021781 (1991-06-01), Salazer et al.
patent: 5167002 (1992-11-01), Fridhandler
patent: 5225759 (1993-07-01), Endo et al.
Gallagher Dennis M.
Pfeifer Thomas M.
Schoonmaker Richard P.
Martin David S.
Pitchenik David E.
Pitney Bowes Inc.
Scolnick Melvin J.
Shapiro Steven J.
LandOfFree
Method for controlling speed in a tape feeding, cutting and ejec does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for controlling speed in a tape feeding, cutting and ejec, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for controlling speed in a tape feeding, cutting and ejec will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-720462