Patent ID: 7257146
Filing Date: 2007-08-14
Classification: F27B,F27D,H05B,Y02P

Abstract:
1. A control system for controlling a multi-phase electric furnace coupled to a multi-phase power supply, the control system comprising: a variable reactor coupled between each phase of the multi-phase electric furnace and the respective phase of the multi-phase power supply; monitoring means coupled to each variable reactor for monitoring an operating characteristic of each phase of the electric furnace and for determining whether the operating characteristic of at least one phase deviates from a respective set-point; control means coupled to each variable reactor and the monitoring means for setting a value of each variable reactor according to the set-point of the phase to which it is coupled, the control means being configured to set the value of each variable reactor to achieve a respective set-point based on the operating characteristic on all phases in response to determination by the monitoring means that the operating characteristic of at least one phase deviates from the respective set-point.