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15 条记录 (耗时 0.06 秒)

    Digital, Back EMF, single coil sampling, sensorless commutator system for a D.C. motor
    6.
    发明授权
    Digital, Back EMF, single coil sampling, sensorless commutator system for a D.C. motor 失效
    数字，反电动势，单线圈采样，直流电动机的无传感器换向器系统

    公开(公告)号：US5672948A

    公开(公告)日：1997-09-30

    申请号：US339827

    申请日：1994-11-15

    申请人： Adam J. Cohen ,  Roger L. Holman ,  Rajesh M. Nair

    发明人： Adam J. Cohen ,  Roger L. Holman ,  Rajesh M. Nair

    IPC分类号： H02P6/18 ,  H02P1/18

    CPC分类号： H02P6/182

    摘要： A digital, back EMF, single coil, sensorless up/down counter frequency adjustment system for a d.c. motor includes means for detecting the occurrence of a null voltage during the back EMF commutation state of a field coil; counter means for counting in one direction during the back EMF commutation state and for counting in the opposite direction when the null voltage is detected; means, responsive to the counter means, for ascertaining the final count of the counter means; and means, responsive to the means for ascertaining, for adjusting the frequency of initiation of the commutation states when a non-zero count is ascertained for synchronizing the field coil and the rotor.

    摘要翻译： 数字，反电动势，单线圈，无传感器上/下计数器频率调节系统。 马达包括用于在励磁线圈的反电动势换向状态期间检测零电压的发生的装置; 计数器装置，用于在反向EMF换向状态期间在一个方向上进行计数，并且当检测到零电压时在相反方向上进行计数; 是指响应计数器装置，以确定计数器装置的最终计数; 以及当确定用于使励磁线圈和转子同步的非零计数时，响应于用于确定的装置来调节换向状态的启动频率的装置。

    IONIZATION DETECTOR FOR ELECTRICALLY ENHANCED AIR FILTRATION SYSTEMS
    9.
    发明申请
    IONIZATION DETECTOR FOR ELECTRICALLY ENHANCED AIR FILTRATION SYSTEMS 有权
    用于电加强空气过滤系统的离子检测器

    公开(公告)号：US20080202335A1

    公开(公告)日：2008-08-28

    申请号：US11964635

    申请日：2007-12-26

    申请人： Peter J. McKinney ,  Adam J. Cohen

    发明人： Peter J. McKinney ,  Adam J. Cohen

    IPC分类号： B03C3/41 ,  B03C3/34 ,  B03C3/38 ,  B03C3/04

    CPC分类号： B03C3/09 ,  B03C3/155 ,  B03C3/32 ,  B03C3/368 ,  Y10S323/903

    摘要： A system and method for ionization detection in electrically enhanced air filtration systems is described. One embodiment includes a system for electrically enhanced air filtration, the system comprising an electrically enhanced filter comprising a filter and an ionizing electrode disposed on an upstream side of the filter; a control device connected to the electrically enhanced filter, wherein the control device can control the electrically enhanced filter; and an ionization detector, wherein the ionization detector is adjacent to the electrically enhanced filter and wherein the ionization detector is connected to the control device.

    摘要翻译： 描述了一种用于电加强空气过滤系统中电离检测的系统和方法。 一个实施例包括用于电增强空气过滤的系统，该系统包括电增强过滤器，其包括设置在过滤器的上游侧的过滤器和电离电极; 连接到所述电增强滤波器的控制装置，其中所述控制装置可以控制所述电增强滤波器; 和电离检测器，其中所述电离检测器与所述电增强滤光片相邻，并且其中所述电离检测器连接到所述控制装置。

    Fluid velocity sensor with heated element kept at a differential temperature above the temperature of a fluid
    10.
    发明授权
    Fluid velocity sensor with heated element kept at a differential temperature above the temperature of a fluid 失效
    具有加热元件的流体速度传感器保持在高于流体温度的温差

    公开(公告)号：US06904799B2

    公开(公告)日：2005-06-14

    申请号：US10461540

    申请日：2003-06-12

    申请人： Adam J. Cohen ,  Josh E. Tang ,  Thomas R. Thibodeau

    发明人： Adam J. Cohen ,  Josh E. Tang ,  Thomas R. Thibodeau

    IPC分类号： G01F1/684 ,  G01F1/698 ,  G01F1/68

    CPC分类号： G01F1/698 ,  G01F1/684

    摘要： A system for measuring the velocity of a fluid can comprise a temperature sensor, for measuring the ambient temperature of the fluid, an RTD placed in the flow path of a fluid, the RTD being included as part of a Wheatstone bridge circuit, a digital potentiometer, the digital potentiometer also being included as part of a Wheatstone bridge circuit, and a controller coupled to the temperature sensor, the RTD and the digital potentiometer. In the system, the controller adjusts the digital potentiometer in response to an ambient fluid temperature signal from the temperature sensor such that the temperature of the RTD remains at a constant differential temperature above the ambient fluid temperature.

    摘要翻译： 用于测量流体速度的系统可以包括用于测量流体的环境温度的温度传感器，放置在流体的流动路径中的RTD，RTD被包括在惠斯登电桥电路的一部分中，数字电位计 ，数字电位器也作为惠斯登电桥电路的一部分，以及耦合到温度传感器，RTD和数字电位器的控制器。 在系统中，控制器响应于来自温度传感器的环境流体温度信号调节数字电位器，使得RTD的温度保持在高于环境温度的恒定温差。