POWER SUPPLY SYSTEM FOR SUPPLYING HEATING ELEMENTS FOR WELDING TUBULAR LENGTHS OF WEB MATERIAL

摘要

There is disclosed a power supply system for a machine (10) for processing tubular lengths of web material, with a plurality of operating units (25) coupled with a rotating conveyor (17), each performing the complete winding of a portion (38) of web material in a tubular configuration with the opposite ends (44) overlapped; and a respective sealing device (48) including a heating element (1) which performs a welding process of such overlapped ends (44). The power supply system has: a plurality of power supply modules (50), each positioned on board of the rotating conveyor and coupled to at least one sealing device (48) of a respective operating unit (25) for selectively supplying the heating element (1) thereof; and a power converting circuit (52), connected to the power supply network for generating a least one power supply signal (Val1) for the power supply modules (50), positioned at a distance from the rotating conveyor (17).