D - Textiles – Paper – 21 – F
Patent
D - Textiles, Paper
21
F
318/16, 341/48
D21F 7/00 (2006.01) B21B 37/46 (2006.01) B21D 1/05 (2006.01) D21F 7/02 (2006.01) B21B 1/24 (2006.01)
Patent
CA 1182543
DIGITAL SPEED CONTROL SYSTEM ABSTRACT OF THE DISCLOSURE A speed control for controlling the speed of drive motors in a multi-stand mill where a master control remotely located with respect to the stands provides signals representing the desired speed of the drive motor for each stand and these signals are carried to the respective stands over a bus conductor or cable. At each stand a signal representing actual speed and the respective signal representing desired speed are compared and the resulting difference signal applied to a speed regulator which regulates the motor speed towards the desired speed. In the past an interruption in the master control, or an incorrect signal, or an interruption in the bus conductor could shut down the mill. The control system described has at each stand a validity check and a memory. The master control periodically provides desired speed signals which up-date the respective memory and the up-dated signal in the memory is used to provide desired speed information. If the master control is temporarily interrupted, or the bus conductor fails, the mill will continue to run based on the last stored signal in the memory representing desired speed until such time as the particular process in the mill requires a speed reference change.
395681
Asprey Peter E.
Bowes David C.
Murdoch James C.
Canadian General Electric Company Limited
Eckersley Raymond A.
LandOfFree
Digital 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 Digital speed control system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Digital speed control system will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1189888