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

fYear

1994

fDate

20-24 Jun 1994

Firstpage

37

Lastpage

44

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Pulp and Paper Industry Technical Conference, 1994., Conference Record of 1994 Annual

Conference_Location

Nashville, TN

Print_ISBN

0-7803-2028-X

Type

conf

DOI

10.1109/PAPCON.1994.324480

Filename

324480