Title :
A retrofit of an analog DC drive with digital control on a winder
Author :
Linzel, Randy C. ; Long, H. William Bill ; Collings, Paul
Author_Institution :
MacMillan Bloedel Ltd., Powell River, BC, Canada
Abstract :
Upgrading an analog DC drive to digital control does not always require a complete drive replacement. By retrofitting the existing power components with digital controls, all of the functionality of a modern digital DC drive can be achieved. Retrofitting can offer a significant cost savings over a complete drive replacement, since the existing power components, motors, power cables and cable support system may be reused. The benefits of an upgrade to digital control include improved drive response, simplified troubleshooting, elimination of tuning parameter “drift”, greater flexibility in operating with different paper grades and orders, and an improved ability to control roll hardness. These benefits translate into reduced downtime, increased production efficiency and improved roll quality. The retrofit described in this case study has achieved the desired results in a cost-effective manner
Keywords :
DC motors; digital control; electric drives; machine control; maintenance engineering; paper industry; power engineering computing; project engineering; winding (process); Canada; DC motor drive; cable support system; cost savings; digital control; downtime; paper industry; power cables; power components; production efficiency; response; retrofitting; roll hardness; roll quality; troubleshooting; tuning parameter drift; upgrade project; winders; Circuit faults; Digital control; Drives; Modems; Potentiometers; Power cables; Production; Relays; Switches; Wiring;
Conference_Titel :
Pulp and Paper Industry Technical Conference, 1994., Conference Record of 1994 Annual
Conference_Location :
Nashville, TN
Print_ISBN :
0-7803-2028-X
DOI :
10.1109/PAPCON.1994.324480
