| 摘要 |
This invention relates to a take-up machine utilized in conjunction with the production of fiber or yarn wherein the product fiber or yarn, as it is produced, is wound onto spools or tubes. A control is provided for varying the speed of an electric motor which drives a spindle on which the tube or spool is mounted. This control is actuated by the position of a compensator arm which is connected to a core of a linear voltage differential transformer which, in turn, controls current flow through an NPN power transistor. The power transistor, in turn, controls current flow through a rectifier having one circuit for each of three windings of a three-phase AC motor, thereby controlling the speed of rotation of the motor.
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