| 摘要 |
This invention is intended to use in the equipment, where certain stroke of linear drive is necessary, for instance valves, blankets, semi-products and details. Proposed linear drive can be used in the flexible transport systems within CAM systems for transferring them between equipment, for sorting by pushing items out of conveyer belt, manipulating with details by delivering them to clamps, move valves or simply use them in general purpose operators. Essence of this invention is method of implementation of linear electric motor for drives with limited stroke. Stroke of linear asynchronous electric motor (LAM) is limited by shifting one of inductors of LAM in respect to other. Mentioned inductor can be shifted synchronously with motor slider, with slider after some dead stroke or using kinematic connection with certain transfer ratio. When of inductors slides in respect to other in the distance equal to pitch of poles, resultant magnetic field vanishes and slider stops. If static resistance force is applied to slider, stop of slider occur when resulting force of magnetic drive and resistance equal to zero.Back stroke is performed when mobile inductor is disconnected from 3-phase electric circuit and fixed inductor is connected to inverted phase 3-phase circuit. In this case LAM works in single-side mode and slider is parked again into initial position. |
