Patent ID: 7490488

Claim:
Circular knitting machine comprising: yarn feeding devices which are incorporated into at least one belt drive of the circular knitting machine, wherein said belt drive is driven by at least one electric motor; an electronic motor speed control system connected with at least one circular knitting machine encoder, wherein a motor speed controller having power electronics and control electronics is structurally incorporated into the electric motor, the motor speed controller being internally directly connected to electric motor windings and being connected externally via a cable strand to an interface unit arranged separately from the electric motor at the circular knitting machines, wherein the circular knitting machine encoder is connected to the interface unit, wherein a motor supplying current and a target value of the target speed of the electric motor are supplied by the cable strand, wherein the target value represents a ratio between the actual speed of the circular knitting machine and the target speed of the electric motor; and wherein the target value is generated in the interface unit by processing the signals of the circular knitting machine encoder and functional parameters being input into the speed control system.