发明授权
- 专利标题: Transportation system with decelerating control
- 专利标题(中): 减速控制运输系统
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申请号: US465272申请日: 1974-04-29
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公开(公告)号: US3948357A公开(公告)日: 1976-04-06
- 发明人: John T. Maynard , Christopher Young
- 申请人: John T. Maynard , Christopher Young
- 申请人地址: KY Louisville
- 专利权人: Armor Elevator Company, Inc.
- 当前专利权人: Armor Elevator Company, Inc.
- 当前专利权人地址: KY Louisville
- 主分类号: B66B1/16
- IPC分类号: B66B1/16 ; B66B1/24 ; H02P23/00 ; B66B1/30
摘要:
A solid state static converter receives a three-phase A.C. input and directly supplies direct current to a D.C. motor operating a traction sheave to control the movement of an elevator car in response to an error signal derived by the selective summation of a speed signal from a tachometer and a pair of vehicle speed command signals. One command signal is a function of the commanded velocity versus time and operatively controls the system during acceleration, constant velocity and a portion of deceleration. The other command signal is a function of the commanded velocity versus time as modified by the sensed position of the car and solely operatively controls the system during a portion of deceleration to stop the vehicle at a selected landing. The modified decelerating vehicle speed command signal is provided by an integrating circuit receiving stepped inputs as a function of a preconditioning input and the command signal input from a feedback circuit and modified in accordance with the sensed position of the vehicle to provide a vehicle command signal having a predetermined plurality of slopes.
公开/授权文献
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