Control method, especially for load balancing of a plurality of electromotor drives

US5874813A · kind A · utility

Assignee

• SMS Schloemann-Siemag Aktiengesellschaft · DE

Inventors

• Thorsten Bode · Neuss, DE
• Jurgen Bernhardt · Eisenberg (Pfalz), DE

Key dates

• Filing date: Jul 11, 1997
• Grant date: Feb 23, 1999
• Expiry date: Jul 11, 2017

Classification

• Technology area (CPC H): Electricity
• CPC primary: H02P5/46
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

A load-balancing method for a multiplicity of controlled drives, especially individual electric motors of the rolls of a leveling machine for metal strip, in which all of the motors have speed and current-control circuits and are interconnected by a superordinate memory programmable computer or controller. A respective load-balancing controller, preferably of the PI type, is provided between the computer and the input to the current controller to vary the current setpoint signal supplied to the latter by the speed controller in each system.