公开(公告)号：US20140070734A1

公开(公告)日：2014-03-13

申请号：US13699810

申请日：2012-09-09

申请人： James Aweya ,  Nayef AlSindi

发明人： James Aweya ,  Nayef AlSindi

IPC分类号： H02P29/00 ,  H02P5/46

CPC分类号： H02P5/46 ,  H02P5/74 ,  H02P23/22

摘要： This invention relates to methods and devices for motor speed control. The invention has particular application in the control of motors over packet networks. In embodiments of the invention, phase-locked loop principles are used to remotely control the speed of an electric motor over a packet network. The setpoint for the motor is supplied by arriving timestamps from a speed-mapped variable frequency source. The shaft speed of the motor is measured with a tachometer with its output proportional to the motor speed. Any deviation of the actual speed from the setpoint is amplified by the power amplifier whose output drives the motor. Speed control over packet networks allow smoother operation of a process, acceleration control, different operating speeds for each process recipe, compensation for changing process variables, slow operation for setup purposes, adjustments to the rate of production, accurate positioning, and control torque or tension of a system.

摘要翻译： 本发明涉及电机速度控制的方法和装置。 本发明特别适用于通过分组网络控制电动机。 在本发明的实施例中，使用锁相环原理来远程控制分组网络上的电动机的速度。 电机的设定值由速度映射的可变频率源的到达时间戳提供。 电机轴转速用转速计测量，其转速与电机转速成比例。 实际速度与设定值的任何偏差由输出驱动电机的功率放大器放大。 通过分组网络的速度控制可以使流程更加顺畅，加速控制，每个过程配方的不同运行速度，改变过程变量的补偿，设定目的的缓慢操作，生产率的调整，精确的定位和控制扭矩或张力 的系统。

公开(公告)号：US20130034197A1

公开(公告)日：2013-02-07

申请号：US13204079

申请日：2011-08-05

申请人： James Aweya ,  Saleh Al Araji

发明人： James Aweya ,  Saleh Al Araji

IPC分类号： H04L7/04

CPC分类号： H04J3/0664 ,  H03L7/0807 ,  H03L7/099 ,  H03L7/0991 ,  H03L7/0994 ,  H03L2207/50 ,  H04J3/0667

摘要： The present invention provides a method of synchronising the frequency of a slave clock to that of a master, preferably using a packet network. An aspects of the invention provide a method of synchronizing the frequency of a slave clock in a slave device to a master clock in a master device, the method including the steps of: a) receiving in the slave device a first message from said master device having a first time-stamp which is a time-stamp of said master clock indicating the time of sending of said first message; b) extracting said time-stamp from said message and initializing a counter in the slave device which counts an output of said slave clock; c) receiving in the slave device a further message from said master device and reading the value of said counter at the time of receipt of said further message; d) extracting a further time-stamp which is the precise time of sending of the further message according to said master clock; e) determining an error signal which is representative of the difference between said value of the counter and the difference between said first and further time-stamps; and f) adjusting the frequency of said slave clock based on said error signal. An apparatus for synchronizing the frequency of a clock in a slave device which is communicatively coupled to a master device is also provided.

摘要翻译： 本发明提供了一种使从属时钟的频率与主机的频率同步的方法，优选地使用分组网络。 本发明的一个方面提供了一种使从设备中的从时钟频率与主设备中的主时钟同步的方法，所述方法包括以下步骤：a）在从设备中接收来自所述主设备的第一消息 具有第一时间戳，其是表示发送所述第一消息的时间的所述主时钟的时间戳; b）从所述消息中提取所述时间戳并初始化从属设备中计数所述从时钟的输出的计数器; c）在所述从设备中从所述主设备接收另外的消息并在接收到所述另外的消息时读取所述计数器的值; d）提取作为根据所述主时钟发送另外的消息的精确时间的另外的时间戳; e）确定代表所述计数器的所述值与所述第一和其它时间戳之间的差的差的误差信号; 以及f）基于所述误差信号调整所述从时钟的频率。 还提供了一种用于使通信地耦合到主设备的从设备中的时钟频率同步的设备。