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Load-dependent asynchronous drive for a transport path

  • US 6,897,625 B2
  • Filed: 08/07/2003
  • Issued: 05/24/2005
  • Est. Priority Date: 08/07/2002
  • Status: Expired due to Fees
First Claim
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1. A conveyor system for transported goods, comprising:

  • a plurality of conveyors, each conveyor having a preset transport speed that depends on a length of the conveyor, a plurality of asynchronous motors associated with the conveyors, whereby the conveyors and the asynchronous motors are placed into one-to-one correspondence, a plurality of sensors associated with each of the conveyors for measuring an actual transport speed of the conveyors to determine a load dependence of the actual transport speed, and a controller receiving control signals from the sensors for compensating differences between the preset transport speed and the actual transport speed, wherein the sensors associated with one of the conveyors measure a an actual travel time for a transported good traveling at least two of the plurality of sensors located on the same conveyor, and wherein a difference between a nominal travel time and the actual travel time is supplied as a control signal to the controller to control the asynchronous motor of a downstream conveyor so that the downstream conveyor receives the goods with the actual transport speed of the one conveyor.

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