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    • 2. 发明授权
    • Externally field-controlled induction generator
    • 外部励磁发电机
    • US5929612A
    • 1999-07-27
    • US888347
    • 1997-07-03
    • David B. EisenhaureJames L. Kirtley, Jr.Geoffrey B. LansberryKevin J. DoneganGita P. Rao
    • David B. EisenhaureJames L. Kirtley, Jr.Geoffrey B. LansberryKevin J. DoneganGita P. Rao
    • H02P9/10H02P9/00
    • H02P9/102
    • In an induction generator, an additional set of stator windings is provided, separate from and secondary to the main stator windings upon which the generator's output voltage is generated and supplied to the load. This separate stator winding is provided for the purpose of supplying the generator with the reactive electrical power it needs to maintain the rotating stator field and supplying any reactive power needed by the load. Thus, there is no need to use a capacitor assembly, for supplying the reactive power needed by the generator. Currents are injected into this separate winding in such a way that only reactive power is supplied to the generator. Specifically, a power measuring circuit measures the power in the additional set of stator windings, and a power error signal is formed by algebraically adding the outputs of the power measuring circuit. The power error signal is further processed and supplied as a timing control signal for generating the injected currents, which are maintained 90 degrees out of phase with an excitation voltage curve.
    • 在感应发电机中,提供了一组附加的定子绕组,与主定子绕组分离并次级,在该定子绕组上产生发电机的输出电压并将其提供给负载。 这个单独的定子绕组被提供用于为发电机提供其维持旋转的定子磁场并提供负载所需的任何无功功率所需的无功电功率。 因此,不需要使用电容器组件来提供发电机所需的无功功率。 电流以这样的方式注入到该单独的绕组中,即只有无功功率被提供给发电机。 具体地,功率测量电路测量附加的定子绕组组的功率,并且通过代数地加上功率测量电路的输出来形成功率误差信号。 功率误差信号被进一步处理并提供作为用于产生与激励电压曲线保持90度异相的注入电流的定时控制信号。
    • 6. 发明授权
    • Time delay compressed synchronous frame controller
    • 时间延迟压缩同步帧控制器
    • US5694017A
    • 1997-12-02
    • US642132
    • 1996-05-02
    • Geoffrey B. Lansberry
    • Geoffrey B. Lansberry
    • H02P21/06H02P5/28
    • H02P21/06
    • A time delay compensated synchronous reference frame controller for a drive motor having a rotor and using an alternating current having a phase angle includes a low pass filter electrically connected to the drive motor for eliminating high frequency components of the alternating current, a coordinate transformer electrically connected to the low pass filter for receiving the alternating current and for defining a moving reference frame based on the phase of the alternating current, a controller electrically connected to the coordinate transformer for driving the alternating current to a proper phase relative to a flux of the rotor of the motor, an inverse coordinate transformer electrically connected to the compensator for receiving the alternating current and for transforming the moving reference frame to a stationary reference frame, and a reference frame shifter operatively connected to this coordinate transformer and the inverse coordinate transformer wherein the reference frame shifter defines a shift in the moving reference frame based on time delays created by the low pass filter and the controller.
    • 用于具有转子并使用具有相位角的交流电的驱动电动机的延时补偿同步参考系控制器包括电连接到驱动电动机的低通滤波器,用于消除交流电的高频分量,电气连接的坐标变换器 到用于接收交流电流并用于基于交流电流的相位定义运动参考系的低通滤波器,电连接到坐标变换器的控制器,用于将交流电流相对于转子的磁通驱动到适当的相位 电连接到补偿器的反向坐标变换器,用于接收交流电流并将移动参考系变换成静止参考系,以及可操作地连接到该坐标变换器和逆坐标变换器的参考移位器,其中参考 框架 基于由低通滤波器和控制器产生的时间延迟来定义移动参考帧中的移位。
    • 8. 发明授权
    • Rotor speed estimator
    • 转子速度估计器
    • US5804724A
    • 1998-09-08
    • US916180
    • 1997-08-21
    • Geoffrey B. LansberryWilliam F. Bonnice
    • Geoffrey B. LansberryWilliam F. Bonnice
    • G01P3/489G01P11/00
    • G01P11/00G01P3/489
    • A method for accurately estimating the rotational speed of a machine includes the steps of initializing a counter, measuring a position of the machine, incrementing the counter, waiting for a position update, measuring a next position of the machine, calculating a difference between the position measurement, measuring the amount of time elapse between positions, returning to the step of incrementing to the counter if the difference is less than a predetermined amount, returning to the step of incrementing the counter if the amount of time is less than a predetermined time, dividing the difference by the amount of time to determine the estimated rotational speed of the machine, and outputing the estimated rotational speed of the machine.
    • 准确地估计机器的转速的方法包括以下步骤:初始化计数器,测量机器的位置,递增计数器,等待位置更新,测量机器的下一个位置,计算位置 测量,测量位置之间的时间量,如果差小于预定量,则返回到递增计数器的步骤,如果时间量小于预定时间,则返回到增加计数器的步骤, 将差除以确定机器的估计转速的时间量,并输出机器的估计转速。