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1.发明授权公开(公告)号：US07268514B2
公开(公告)日：2007-09-11
申请号：US11002011
申请日：2004-11-30
CPC分类号： B66B5/0031 , B66B1/30
摘要： A method and apparatus for stopping an AC motor that is controlling a load while detecting mechanical brake slippage of a mechanical brake for holding the load against movement includes a controller for decreasing torque-producing current commands from the drive while a speed regulator is commanding zero speed, sensing movement of the load while the speed regulator is commanding zero speed, detecting movement of the load past a pre-determined distance limit, and increasing torque to support the load and prevent further movement of the load. The controller will again decrease torque-producing current commands from the drive, and again checking for movement of the load, and upon sensing no load movement upon reaching zero torque, then shutting off the motor.
摘要翻译： 一种用于在检测用于保持负载抵抗运动的机械制动器的机械制动器滑动的同时控制负载的AC电动机的停止方法和装置包括用于在速度调节器指令零速度时减少来自驱动器的转矩产生电流命令的控制器 在速度调节器指令零速度时检测负载的运动，检测负载的运动超过预定的距离极限，以及增加转矩以支持负载并防止负载的进一步移动。 控制器将再次降低来自驱动器的扭矩产生电流指令，并再次检查负载的运动，并且在达到零转矩时检测到无负载运动，然后关闭电机。
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公开(公告)号：US5294909A
公开(公告)日：1994-03-15
申请号：US001365
申请日：1993-01-07
申请人： Glenn E. Frazier
发明人： Glenn E. Frazier
CPC分类号： G01M3/045 , G01M3/165 , G01N27/205
摘要： An elongate resistive sensor useful as an element of a pneumatic manifold failure detecting and locating system. A sensing loop is based on a coaxial cable having a core of known resistance per unit length. A eutectic salt impregnated insulant separates the core and sheath but has a temperature breakdown characteristic which provides the sensing function. Upon a pneumatic manifold failure, the sensing cable is heated, the eutectic salt insulator breaks down, a core-to-sheath short occurs, and currents in the sensing cable are substantially altered as a result. The cable is connected as a loop, and differential currents into the ends of the loop are detected and processed to determine the position of the short. Terminating resistors are associated with connectors which connect multiple cable sections into a single loop, and the terminating impedance is further sensed to determine an open circuit condition at any connector.
摘要翻译： 用作气动歧管故障检测和定位系统的元件的细长电阻传感器。 感测回路基于具有每单位长度已知电阻的芯的同轴电缆。 共晶盐浸渍绝缘体分离芯和鞘，但具有提供感测功能的温度击穿特性。 当气动歧管故障时，感测电缆被加热，共晶盐绝缘体发生故障，发生芯 - 鞘短路，结果感测电缆中的电流基本上改变。 电缆作为回路连接，并检测并处理到回路端部的差动电流，以确定短路的位置。 终端电阻器与将多个电缆部分连接成单个环路的连接器相关联，并且进一步感测终端阻抗以确定任何连接器处的开路状况。
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