Variable speed hydraulic pump
    1.
    发明授权
    Variable speed hydraulic pump 有权
    变速液压泵

    公开(公告)号:US06863502B2

    公开(公告)日:2005-03-08

    申请号:US10257302

    申请日:2001-04-13

    摘要: The invention provides a variable speed hydraulic pump designed to operate at a maximum horsepower throughout its pressure range by adjusting motor speed according to motor load parameters. In particular, the variable speed hydraulic pump includes a hydraulic pump unit coupled to a variable speed electric motor by a drive unit and to a hydraulic fluid tank for pressurizing and pumping hydraulic fluid when operated by the motor. A motor controller is electrically connected to the motor to supply drive signals to the motor based on electrical characteristics of the drive signals which are dependent on the load exerted on the motor. Suction from the load is provided by both the main pump and a bidirectional supercharging pump by reversing the direction of the motor and shifting a 4/3 valve to connect the main pump inlet to the load and its outlet to tank. In addition, the controller reduces the motor speed at the maximum rated pressure to just maintain the pressure, to reduce the amount of fluid pumped through the maximum pressure relief valve.

    摘要翻译: 本发明提供了一种变速液压泵,其设计为通过根据电动机负载参数调整电动机速度在其整个压力范围内以最大功率运行。 特别地,变速液压泵包括通过驱动单元连接到变速电动机的液压泵单元和用于在由电动机操作时对液压流体进行加压和泵送的液压油箱。 电动机控制器电连接到电动机,以基于驱动信号的电特性向电动机提供驱动信号,驱动信号取决于施加在电动机上的负载。 从主泵和双向增压泵通过反转电机的方向和移动4/3阀将主泵入口连接到负载及其出口到罐而由负载提供吸力。 此外,控制器将电机速度降低到最大额定压力,以保持压力,以减少通过最大压力释放阀泵送的液体量。

    Pressure control system using input current sensing
    2.
    发明授权
    Pressure control system using input current sensing 有权
    压力控制系统采用输入电流检测

    公开(公告)号:US06577089B1

    公开(公告)日:2003-06-10

    申请号:US09806364

    申请日:2001-09-21

    IPC分类号: H02P700

    摘要: A method and apparatus for controlling the output function of a permanent magnet brushless DC motor (20), by sensing an input current to the motor (20), by computing an output torque generated by the motor (20) as a function of the input current to the motor (20), by computing an output pressure for a pump (22) in response to the output torque, by reading a set point pressure, and by comparing the set point pressure to the output pressure, and in response thereto controlling on-off operation of the motor (20). The apparatus includes a sensing circuit (28) and a microelectronic processor (30) for performing these functions.

    摘要翻译: 一种方法和装置,用于通过根据所述输入来计算由所述电动机(20)产生的输出转矩,通过感测到所述电动机(20)的输入电流来控制永磁无刷直流电动机(20)的输出功能 通过读取设定点压力,并通过将设定点压力与输出压力进行比较来计算泵(22)的输出压力,并且响应于控制 马达(20)的开 - 关操作。 该装置包括用于执行这些功能的感测电路(28)和微电子处理器(30)。

    Closed loop control of motor position and velocity
    3.
    发明授权
    Closed loop control of motor position and velocity 有权
    电机位置和速度闭环控制

    公开(公告)号:US06525502B1

    公开(公告)日:2003-02-25

    申请号:US09806622

    申请日:2001-03-26

    IPC分类号: G05B1931

    CPC分类号: H03M1/485

    摘要: A digital signal processor for closed loop velocity or position control receives sine winding output signals and cosine winding output signal from a resolver, digitizes the signals and outputs quadrature encoded signals to an excitation circuit. The excitation circuit is connected to an excitation winding in the resolver to provide signals for driving the resolver.

    摘要翻译: 用于闭环速度或位置控制的数字信号处理器从解算器接收正弦绕组输出信号和余弦线圈输出信号,数字化信号并将正交编码信号输出到激励电路。 励磁电路连接到旋转变压器中的励磁绕组,以提供用于驱动旋转变压器的信号。

    Low cost redundant resolver system
    4.
    发明授权
    Low cost redundant resolver system 失效
    低成本冗余旋转变压器系统

    公开(公告)号:US06472841B1

    公开(公告)日:2002-10-29

    申请号:US09806624

    申请日:2001-03-29

    IPC分类号: G05B106

    CPC分类号: H02K24/00 G08C19/40

    摘要: A resolver (20, 21) is provided with redundant excitation windings in which only a single excitation winding (E1) is energized externally. Cross coupling from the externally energized winding (E1) excites the other excitation winding (E2). A control circuit (27, 28) monitors the excitation of the redundant excitation winding (E2) and switches the excitation to the redundant excitation winding (E2) in the event of a failure of the externally winding (E1).

    摘要翻译: 旋转变压器(20,21)具有冗余的励磁绕组,其中只有一个励磁绕组(E1)被外部通电。 来自外部通电的绕组(E1)的交叉耦合激励另一个励磁绕组(E2)。 在外部绕组(E1)发生故障的情况下,控制电路(27,28)监视冗余激励绕组(E2)的激励并将激励切换到冗余激励绕组(E2)。

    Low cost resolver system
    5.
    发明授权
    Low cost resolver system 失效
    低成本解算系统

    公开(公告)号:US6084376A

    公开(公告)日:2000-07-04

    申请号:US93720

    申请日:1998-06-09

    摘要: A resolver (10) is excited with a high frequency signal from excitation circuit (16). Outputs of the resolver (10) are transmitted through receiver circuit (24) and input to a DSP signal processing circuit (18), which demodulates the sine and cosine outputs to provide samples of the sine and cosine of the rotor position. The sample values are converted to digital values, which are used to calculate a shaft angular position, which is then used for closed loop position and velocity control of a brushless PM motor (14).

    摘要翻译: 旋转变压器(10)由来自激励电路(16)的高频信号激励。 解析器(10)的输出通过接收器电路(24)传输并输入到DSP信号处理电路(18),其解调正弦和余弦输出以提供转子位置的正弦和余弦的采样。 将样本值转换为数字值,用于计算轴角位置,然后将其用于无刷无刷电动机(14)的闭环位置和速度控制。

    Method of controlling a motor
    6.
    发明授权
    Method of controlling a motor 有权
    控制电机的方法

    公开(公告)号:US08659249B2

    公开(公告)日:2014-02-25

    申请号:US13425292

    申请日:2012-03-20

    IPC分类号: H02P27/00 H02P7/00

    CPC分类号: H02P1/029 H02P29/032

    摘要: Embodiments of the invention provide methods of controlling a motor, such as a servo motor. One method can include monitoring a current temperature of the motor and a power stage of the motor substantially continuously and substantially in real-time. This method can include determining optimum settings for a first time interval to remove power and the second time interval to provide power in order to deliver maximum output while remaining below the maximum rated temperature of the motor. One method can include pulsing power to the motor for a second time interval after a first time interval has elapsed and tailoring pulse shapes of the power provided to the motor for the second time interval. One method can include calculating a maximum phase current based on the rotor shaft torque for each real-time speed of the motor that correlates to the maximum allowable current draw from the power supply.

    摘要翻译: 本发明的实施例提供了一种控制诸如伺服电动机的电动机的方法。 一种方法可以包括基本上连续且基本上实时地监视电动机的当前温度和电动机的功率级。 该方法可以包括确定用于消除功率的第一时间间隔的最佳设置和第二时间间隔以提供功率,以便在保持低于电动机的最大额定温度的情况下传递最大输出。 一种方法可以包括在经过第一时间间隔之后的第二时间间隔内对电动机脉动功率,并且为第二时间间隔定义提供给电动机的功率的脉冲形状。 一种方法可以包括基于与电源的最大允许电流消耗相关的电动机的每个实时速度的转子轴转矩来计算最大相电流。

    Method of Controlling a Motor
    7.
    发明申请
    Method of Controlling a Motor 有权
    控制电机的方法

    公开(公告)号:US20120181964A1

    公开(公告)日:2012-07-19

    申请号:US13425292

    申请日:2012-03-20

    IPC分类号: H02P7/00

    CPC分类号: H02P1/029 H02P29/032

    摘要: Embodiments of the invention provide methods of controlling a motor, such as a servo motor. One method can include monitoring a current temperature of the motor and a power stage of the motor substantially continuously and substantially in real-time. This method can include determining optimum settings for a first time interval to remove power and the second time interval to provide power in order to deliver maximum output while remaining below the maximum rated temperature of the motor. One method can include pulsing power to the motor for a second time interval after a first time interval has elapsed and tailoring pulse shapes of the power provided to the motor for the second time interval. One method can include calculating a maximum phase current based on the rotor shaft torque for each real-time speed of the motor that correlates to the maximum allowable current draw from the power supply.

    摘要翻译: 本发明的实施例提供了一种控制诸如伺服电动机的电动机的方法。 一种方法可以包括基本上连续且基本上实时地监视电动机的当前温度和电动机的功率级。 该方法可以包括确定用于消除功率的第一时间间隔的最佳设置和第二时间间隔以提供功率,以便在保持低于电动机的最大额定温度的情况下传递最大输出。 一种方法可以包括在经过第一时间间隔之后的第二时间间隔内对电动机脉动功率,并且为第二时间间隔定义提供给电动机的功率的脉冲形状。 一种方法可以包括基于与电源的最大允许电流消耗相关的电动机的每个实时速度的转子轴转矩来计算最大相电流。

    Fire-extinguishing system with servo motor-driven foam pump
    10.
    发明授权
    Fire-extinguishing system with servo motor-driven foam pump 有权
    带伺服电机驱动泡沫泵的灭火系统

    公开(公告)号:US08297369B2

    公开(公告)日:2012-10-30

    申请号:US12555714

    申请日:2009-09-08

    IPC分类号: A62C35/00 F04B41/06 F04B49/00

    CPC分类号: G05B11/06 A62C5/02 F04B49/065

    摘要: Embodiments of the invention provide a fire-extinguishing system for injecting foamant into a stream of water. The system can include a flow meter determining a flow rate of the stream of water and a foam pump having an inlet coupled to a supply of foamant and an outlet coupled to the stream of water. The system includes a servo motor driving the foam pump. The servo motor includes a sensor used to determine a rotor shaft speed and/or a rotor shaft torque. A controller can control an operating speed of the servo motor using closed-loop control depending on the flow rate and the rotor shaft speed and/or the rotor shaft torque.

    摘要翻译: 本发明的实施方案提供了一种用于将发泡剂注入到水流中的灭火系统。 该系统可以包括确定水流的流量的流量计和具有耦合到发泡剂供应源的入口和连接到水流的出口的泡沫泵。 该系统包括驱动泡沫泵的伺服电机。 伺服电动机包括用于确定转子轴速度和/或转子轴转矩的传感器。 控制器可以根据流量和转子轴速度和/或转子轴转矩来控制使用闭环控制的伺服电动机的运行速度。