Drive rollers to the advance of a strip of material, in particular to the advance of the mat of fibers of a machine to be needled

摘要

There is described a roller drive for the feed of a web of material, in particular for the web feed of a needling machine, comprising an electric drive motor (2) for at least one feed roller (1), which is connected to a mains-operated intermediate DC circuit (5). To create advantageous constructional conditions it is proposed that the mechanical drive train between the drive motor (2) and the feed roller (1) includes an additional electric motor (9) likewise connected to the intermediate DC circuit (5), which additional motor can be driven as generator by the drive motor (2).