Patent ID: 8309878
Filing Date: 2012-11-13
Classification: B23K,H05H

Abstract:
1. A power supply for supplying a DC output current for use in a plasma arc system, said power supply comprising: a plurality of power modules connected in parallel, each said power module providing a DC output from an AC input, each said power module comprising a rectifier, a converter, an inverter and a power module controller, said power module controller configured to control at least one of said rectifier, said converter or said inverter to regulate the DC output of said power module; a master controller coupled to each of said power module controllers, said master controller configured to regulate the DC output current of said power supply, wherein said master controller is configured to monitor the DC output of said power supply, said master controller configured to control each of said power module controllers based at least in part on the DC output of said power supply.