Abstract: A yarn winding apparatus for winding a plurality of continuously advancing yarns into cross wound packages, and which includes a rotatable revolver which mounts a pair of winding spindles which are alternately moved between a winding position and a doffing position. A beam-like carrier supports a yarn traversing mechanism and a sensor roll for each package being formed, and the drive electronics and the control electronics are combined in a control unit which is mounted on the outer end portion of the length of the carrier.

Abstract: An apparatus for driving a plurality of motors at different variable speeds. The apparatus includes a rectifier for supplying direct current power to a dc bus circuit. A plurality of inverters are connected to the dc bus circuit and each inverter drives a respective motor. Each inverter is controlled by an individual controller connected thereto for controlling the frequency of the output of the inverter to thereby control the speed of the associated motor. The inverters are preferably mounted on a common heat sink to reduce electrical and mechanical complexity. The apparatus permits the rectifier and the dc bus circuit to be sized to handle a maximum rating of less than the sum total of maximum loads of each of the motors. The dc bus circuit also serves to distribute energy generated by a slowing motor, for example, to other motors driven from the bus circuit. A chopper resistor may be included and switched across the dc bus circuit to provide braking to the motors.