| 摘要 |
<p>An apparatus for driving a needling machine with a plurality of needling means which can be driven by electric motors (1) and which are controlled with respect to their mutual angular position by a control means (5) and are fed by an a.c. power supply (3) is characterised in that the motors (1) are connected to a common d.c. link (4) together with a drive (11) for a flywheel (12), where the drive may operate as a motor or as a generator depending on load conditions. Under normal conditions, the drive acts as a motor and stores energy in the flywheel. If there is a mains power failure, the drive (11) acts as a generator and the energy stored in the flywheel (12) may be fed into the common d.c. link (4) to the electric motors (1) to ensure a synchronous slow-down of the needling means. The control means (5) can monitor the flow of energy through static power converters (2) associated with the drives to recognise and correct errors. The feed drive (8) for the web is similarly connected to the a.c. power supply (3) and the d.c. link (4).</p> |
