IQ罗托克内部原理技术交流ppt.ppt

力矩保护 力矩开关可在额定力矩的40%-100%范围内设定。在开阀、关阀时，如果力矩超出设定值，执行机构将自动停止运行。根据实际情况，开阀方向可设定加强力矩。 瞬间反转保护 电机启动时，控制逻辑产生一个延时，用以响应控制信号的瞬时反转，防止接触器触点损坏，防止因瞬间高惯量负载过载而导致力矩跳断。 阀门卡住保护 当阀门在阀座上卡住时，执行器电机失速，电机电源将在7秒内断开，以防止设备损坏，同时可提供现场和远程的阀门卡住指示。 ASTD自动自检和诊断 在电源接通时，执行器自动检测必要的工作电路和存储设备以确保正常运行。如发生异常设备问题，IQ会自动检测原因，并将信息以图标和文字形式显示于执行器LCD窗口，且电动操作将被禁止，以防止执行器和阀门损坏，同时向远方发送故障指示信号。 Pakscan Profibus Foundation Modbus DeviceNet IQ Pro系列智能执行机构可兼容多种现场总线标准，实现与全厂控制系统（DCS、PLC）的通讯连接。 总线系统 Pakscan总线系统 1、阀门等厂家提供扭矩（力矩或推力）（要含安全系数） 2、阀门类型－直行程（推力型）or角行程or多回转 3、控制方式：开关型or调节型 （两线制开关型；带4～20mA 反馈信号； 带4～20mA 控制及反馈信号；现场总线控制） 4、连接方式：直连式or底座式 5、工作电源：380v/三相/50hzor220v/单相/50hz 6、应用场合：防水型or防爆型 （Eexd IIBT4或Eexd IICT4） 7、环境温度：-30℃ ---70℃ 8、控制要求（行程时间、全行程圈数总线等） 注：如对阀门开启时间有设计要求，多回转阀门则需提供阀门的开启圈数。其它 选型技术条件 * * * * * * * * 7 7 3 3 3 3 The mechanical drive arrangement should be described, pointing out its simplicity, Three rotating parts, the rotor and wormshaft, the wormwheel and output centre column, the drive to the output turns counting system. The incremental encoder (counter) consists of a magnet and two 慼all effect?switches which give electrical pulses to the position processor. this is infinitely more simple than complex gear mechanisms with multitudes of LEDs and photo transistors. * * 9 9 6 6 6 6 This picture shows the design of the local controls, in particular the fact that shafts do not penetrate the enclosure is illustrated. * 12 12 11 11 11 11 Syncrophase ensures that the actuator runs in the requested direction of travel no matter which way round the incoming three phase lines are connected. Syncrophase is essentially an 搃ntelligent?design feature which detects the incoming phase rotation and re-assigns duty to the appropriate contactor to ensure that the actuator runs in the correct direction. Without this feature and with the incoming phases incorrectly connected the actuator would run in the close direction when requested to open and vice versa. If this happened the actuator would stall at the end of travel beca