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22 条记录 (耗时 0.02 秒)

    Fume hood controller
    1.
    发明授权
    Fume hood controller 失效
    通风柜控制器

    公开(公告)号：US4528898A

    公开(公告)日：1985-07-16

    申请号：US586007

    申请日：1984-03-05

    申请人： Gordon P. Sharp ,  William P. Curtiss ,  George B. Yundt

    发明人： Gordon P. Sharp ,  William P. Curtiss ,  George B. Yundt

    IPC分类号： B08B15/02 ,  F24F11/00

    CPC分类号： B08B15/023

    摘要： A fume hood controller system in which the sash position is monitored by a transducer which provides a signal indicative of the area of the hood opening. A variable speed controller responsive to the sash position signal to provides a fan speed which varies as a function of the sash opening. An optional circuit monitors the power drawn by the motor and compares the actual power drawn by the motor with the expected power for the present sash position. If the actual power falls below the threshold, an alarm signal is generated indicating a reduced air flow in the fume hood. Additionally, motor overload may be detected by comparing the motor speed control signal with the actual motor speed. An alternate embodiment is shown in which the present invention may be used to control a single blower which exhausts a plurality of fume hoods while maintaining a substantially constant face velocity in each hood.

    摘要翻译： 通风柜控制器系统，其中窗扇位置由提供指示罩开口面积的信号的换能器监控。 响应于窗框位置信号的变速控制器提供根据窗扇开口而变化的风扇速度。 一个可选的电路监测电动机的功率，并将电动机的实际功率与当前窗框位置的预期功率进行比较。 如果实际功率低于阈值，则产生指示通风橱中的气流减少的报警信号。 此外，可以通过将电动机速度控制信号与实际电动机速度进行比较来检测电动机过载。 示出了一个替代实施例，其中本发明可用于控制排出多个通风柜的单个鼓风机，同时在每个罩中保持基本恒定的面速。

    Fume hood controller
    2.
    发明授权
    Fume hood controller 失效
    通风柜控制器

    公开(公告)号：US4706553A

    公开(公告)日：1987-11-17

    申请号：US732205

    申请日：1985-05-08

    申请人： Gordon P. Sharp ,  William P. Curtiss ,  George B. Yundt

    发明人： Gordon P. Sharp ,  William P. Curtiss ,  George B. Yundt

    IPC分类号： B08B15/02

    CPC分类号： B08B15/023

    摘要： A fume hood controller system in which the sash position is monitored by a transducer which provides a signal indicative of the area of the hood opening. A variable speed motor controller is responsive to the sash position signal to provide a fan speed which varies in a substantially continuous and linear manner as a function of the sash opening. In an alternate embodiment, the air flow through the hood is controlled by a damper or similar device. Several embodiments are shown in which the present invention may be used to control a fume hood system in which a blower exhausts a plurality of fume hoods while maintaining a substantially constant face velocity in each hood.

    摘要翻译： 通风柜控制器系统，其中窗扇位置由提供指示罩开口面积的信号的换能器监控。 变速电动机控制器响应窗扇位置信号以提供作为窗扇开口的函数以基本上连续和线性的方式变化的风扇速度。 在替代实施例中，通过罩的空气流由阻尼器或类似装置控制。 示出了几个实施例，其中本发明可用于控制通风橱系统，其中鼓风机排放多个通风橱，同时在每个罩中保持基本恒定的面速。

    Induction generator frequency control system
    3.
    发明授权
    Induction generator frequency control system 失效
    感应发电机频率控制系统

    公开(公告)号：US4413223A

    公开(公告)日：1983-11-01

    申请号：US257534

    申请日：1981-04-27

    申请人： George B. Yundt ,  William P. Curtiss

    发明人： George B. Yundt ,  William P. Curtiss

    IPC分类号： H02P9/00 ,  H02P9/04 ,  H02P9/42

    CPC分类号： H02P9/04

    摘要： A frequency control system for an n-phase induction machine having an input shaft and at least one output line, where n is an integer. The system includes a generator that provides an electrical frequency control signal, f.sub.e, which is representative of the difference between the phase of the voltage on the output line and the phase of a reference signal. The system further includes a generator for providing a mechanical frequency control signal which is representative of the frequency of rotation of the input shaft to the induction generator. Another generator provides a torque generator control signal which is representative of the difference between the electrical frequency control signal and the mechanical frequency control signal. A torque generator, such as an internal combustion engine, is adapted to be responsive to the torque generator control signal for applying a torque to the input shaft of the induction machine, where the applied torque is related to the torque generator control signal.

    摘要翻译： 一种用于n相感应电机的频率控制系统，其具有输入轴和至少一条输出线，其中n是整数。 该系统包括发电机，其提供电频率控制信号fe，其表示输出线上的电压的相位与参考信号的相位之间的差。 该系统还包括用于提供表示输入轴到感应发电机的旋转频率的机械频率控制信号的发电机。 另一个发电机提供了代表电气频率控制信号和机械频率控制信号之间的差异的扭矩发生器控制信号。 诸如内燃机的扭矩发生器适于响应扭矩发生器控制信号，以向感应电机的输入轴施加扭矩，其中所施加的转矩与转矩发生器控制信号相关。

    Self-starting transducerless, brushless D.C. motor controller
    6.
    发明授权
    Self-starting transducerless, brushless D.C. motor controller 失效
    自启动无传感器，无刷直流电机控制器

    公开(公告)号：US4455513A

    公开(公告)日：1984-06-19

    申请号：US401420

    申请日：1982-07-26

    申请人： Donald E. Fulton ,  William P. Curtiss ,  William T. Fejes, Jr.

    发明人： Donald E. Fulton ,  William P. Curtiss ,  William T. Fejes, Jr.

    IPC分类号： H02P6/00 ,  H02K29/00 ,  H02P7/00

    CPC分类号： H02P6/00

    摘要： A transducerless brushless permanent magnet motor in which a signal induced by the rotor in an unexcited winding is used to sense the rotor position. The sensed voltage, induced in the winding by the rotor, is integrated to provide a representation of the magnetic flux coupling the rotor and winding. Before start-up, both the rotor position and the integrator are initialized to align the circuit representation of the flux with the actual flux.In an additional embodiment of the invention, a self-initialization circuit is provided to automatically preset the rotor and flux integrator to pre-determined and corresponding values.

    摘要翻译： 一种无转子无刷永磁电动机，其中使用由未转速绕组中的转子感应的信号来感测转子位置。 由转子在绕组中感应的感测电压被集成以提供耦合转子和绕组的磁通量的表示。 在启动之前，转子位置和积分器都被初始化，以将通量的电路表示与实际通量对齐。 在本发明的另外的实施例中，提供自初始化电路以将转子和磁通积分器自动预设为预定的和对应的值。

    Low loss permanent magnet motor
    7.
    发明授权
    Low loss permanent magnet motor 失效
    低损耗永磁电动机

    公开(公告)号：US4868479A

    公开(公告)日：1989-09-19

    申请号：US81540

    申请日：1987-08-04

    申请人： Ahn Byong-Ho ,  Donald E. Fulton ,  Philip J. Gilinson, Jr. ,  David C. Whipple ,  William P. Curtiss

    发明人： Ahn Byong-Ho ,  Donald E. Fulton ,  Philip J. Gilinson, Jr. ,  David C. Whipple ,  William P. Curtiss

    IPC分类号： G01C19/08 ,  H02K29/12 ,  H02P25/02

    CPC分类号： G01C19/08 ,  H02K29/12 ,  H02P25/024

    摘要： A back EMF controlled, synchronous, permanent magnet motor capable of extremely high rotation speeds at high efficiency. The motor includes a permanent magnet flux source and excitation coils for producing a rotating magnetic field mounted on an iron free form to substantially eliminate core loss and resulting rotor drag. Back EMF is determined directly from the excitation and controls the excitation to produce a torque angle of substantially 90.degree. between the magnet and coil fluxes. Coil excitation is used at maximum efficiency and hunting is avoided. The permanent magnet provides a high flux density that also allows a low current in the motor coils and thus reduces coil copper losses to further improve efficiency.

    摘要翻译： 一种反电动势控制的同步永磁电动机，能够以高效率实现极高的转速。 电动机包括用于产生安装在无铁形式上的旋转磁场的永磁通量源和励磁线圈，以基本上消除铁损和产生的转子阻力。 反向EMF直接由励磁确定，并控制励磁，从而在磁体和线圈通量之间产生大致90°的转矩角。 以最大效率使用线圈激励，避免了狩猎。 永磁体提供高磁通密度，其也允许电动机线圈中的低电流，从而减少线圈铜损耗以进一步提高效率。

    Adaptive induction motor controller
    8.
    发明授权
    Adaptive induction motor controller 失效
    自适应感应电动机控制器

    公开(公告)号：US4670698A

    公开(公告)日：1987-06-02

    申请号：US557637

    申请日：1983-12-02

    申请人： Donald E. Fulton ,  William P. Curtiss ,  Jonathan R. Leehey

    发明人： Donald E. Fulton ,  William P. Curtiss ,  Jonathan R. Leehey

    IPC分类号： G01R31/34 ,  H02P21/14 ,  H02P5/40 ,  G01R27/00

    CPC分类号： G01R31/343 ,  H02P21/09 ,  H02P21/16 ,  H02P2207/01

    摘要： A method of measuring induction motor parameters so that the speed and torque control of an induction motor controller may be optimized. While the motor is stopped, a test signal made up of a current pulse of a known amplitude is applied to one or more windings of the motor stator for a selected period of time, after which the current pulse is turned off. After a short delay, the instanteous voltage across the stator windings is measured, and also an integration of the stator voltage is started which continues long enough so that the stator voltage decays to substantially zero. The measured voltage and integrated voltage are respectively proportional to the rotor resistance and the motor magnetizing inductance.

    摘要翻译： 一种测量感应电动机参数的方法，以便可以优化感应电动机控制器的速度和转矩控制。 当电动机停止时，将由已知幅度的电流脉冲构成的测试信号施加到电动机定子的一个或多个绕组一段选定的时间段，之后电流脉冲被关断。 在短暂的延迟之后，测量定子绕组两端的瞬时电压，并且开始定子电压的积分，其持续足够长的时间，使得定子电压基本为零衰减。 测量电压和积分电压分别与转子电阻和电机励磁电感成正比。

    Back EMF controlled permanent magnet motor
    10.
    发明授权
    Back EMF controlled permanent magnet motor 失效
    反电动势控制永磁电动机

    公开(公告)号：US4275343A

    公开(公告)日：1981-06-23

    申请号：US973860

    申请日：1978-12-28

    申请人： Donald E. Fulton ,  William P. Curtiss

    发明人： Donald E. Fulton ,  William P. Curtiss

    IPC分类号： H02P25/02 ,  H02P7/36 ,  H02P5/28

    CPC分类号： H02P25/024

    摘要： A back EMF controlled, synchronous, permanent magnet motor capable of extremely high rotation speeds at high efficiency. The motor includes a permanent magnet flux source and excitation coils for producing a rotating magnetic field mounted on an iron free form to substantially eliminate core loss and resulting rotor drag. Back EMF is determined directly from the excitation and controls the excitation to produce a torque angle of substantially 90.degree. between the magnet and coil fluxes. Coil excitation is used at maximum efficiency and hunting is avoided. The permanent magnet provides a high flux density that also allows a low current in the motor coils and thus reduces coil copper losses to further improve efficiency.

    摘要翻译： 一种反电动势控制的同步永磁电动机，能够以高效率实现极高的转速。 电动机包括用于产生安装在无铁形式上的旋转磁场的永磁通量源和励磁线圈，以基本上消除铁损和产生的转子阻力。 反向EMF直接由励磁确定，并控制励磁，从而在磁体和线圈通量之间产生大致90°的转矩角。 以最大效率使用线圈激励，避免了狩猎。 永磁体提供高磁通密度，其也允许电动机线圈中的低电流，从而减少线圈铜损耗以进一步提高效率。