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公开(公告)号：US5717305A
公开(公告)日：1998-02-10
申请号：US673657
申请日：1996-06-28
摘要： A method and apparatus for controlling an AC motor are described wherein a frequency generator is configured to generate a signal representative of the stator electrical frequency and to estimate the rotor electrical frequency of the motor during operation. The generator operates on torque and flux current reference signals and on d-axis voltage reference and feedback signals to determine the electrical frequencies. The generator ramps up gain values applied to the torque current reference signals and to a voltage error signals representative of the difference between the d-axis voltage reference and feedback signals during a startup phase of operation to enhance performance and stability of the drive during this phase. The generator includes feedforward and feedback portions that contribute components of the final stator frequency signal. The components are filtered differently during startup and running phases of operation to provide the desired frequency signals.
摘要翻译： 描述了一种用于控制AC电动机的方法和装置，其中频率发生器被配置为产生表示定子电频率的信号，并且在运行期间估计电动机的转子电频率。 发电机工作在扭矩和磁通电流参考信号以及d轴电压参考和反馈信号上，以确定电气频率。 发电机在运行启动阶段时，增加施加于转矩电流参考信号的增益值和表示d轴参考电压和反馈信号之间的差值的电压误差信号，以提高驱动器在此阶段的性能和稳定性 。 发生器包括前馈和反馈部分，其贡献最终定子频率信号的分量。 组件在运行的启动和运行阶段被不同地过滤，以提供所需的频率信号。
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62.发明授权Apparatus used with an inverter/converter eliminating unintended voltage pulses 失效用于逆变器/转换器的装置消除意外的电压脉冲
公开(公告)号：US5581169A
公开(公告)日：1996-12-03
申请号：US298624
申请日：1994-08-31
IPC分类号： H02M7/5395 , H02P5/40
CPC分类号： H02M7/5395
摘要： A method and apparatus used with a motor controller having a PWM inverter for eliminating discontinuities in a stator current that are caused by noise, command signal discontinuities and feedback corrections. While noise, discontinuities, and correction can cause multiple crossings between a carrier signal and a command signal during a half cycle of a carrier signal, the present invention only allows a single crossing during any carrier signal half cycle to effect motor operation.
摘要翻译： 一种用于具有PWM逆变器的电动机控制器的方法和装置，用于消除由噪声，指令信号不连续和反馈校正引起的定子电流的不连续性。 虽然在载波信号的半周期期间，噪声，不连续性和校正可能导致载波信号和命令信号之间的多个交叉，但是本发明仅允许在任何载波信号半周期期间的单个交叉以实现电机操作。
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公开(公告)号：US5032771A
公开(公告)日：1991-07-16
申请号：US565288
申请日：1990-08-09
IPC分类号： H02P21/08
CPC分类号： H02P21/09
摘要： An electronic motor drive for vector control of an induction motor controls slip and operating frequency in response to changes in stator voltage. The drive includes a torque control loop, a flux control loop and a frequency control loop which includes slip control in response to a voltage difference. In the constant horsepower range, above base speed, slip is controlled in response to an error between a d-axis reference voltage that is sampled at base speed and a d-axis feedback voltage that is sensed when the motor is operating above base speeed. Flux-weakening is provided in response to an error between a q-axis reference voltage that is sensed when the motor is operating at base speed and a q-axis feedback voltage that is sensed when the motor is operating above speed.
摘要翻译： 用于感应电动机的矢量控制的电动机驱动器根据定子电压的变化来控制滑差和工作频率。 驱动器包括扭矩控制回路，磁通控制回路和频率控制回路，其包括响应于电压差的滑差控制。 在恒功率范围内，在基本速度以上时，响应于以基准速度采样的d轴参考电压和当电机在基准频率以上运行时感测到的d轴反馈电压之间的误差来控制滑差。 响应于当电动机以基准速度操作时感测到的q轴参考电压和当电动机正在高于速度运行时感测到的q轴反馈电压之间的误差而提供磁通弱化。
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64.发明授权
公开(公告)号：US4958117A
公开(公告)日：1990-09-18
申请号：US414684
申请日：1989-09-29
申请人： Russel J. Kerkman , Brian J. Seibel
发明人： Russel J. Kerkman , Brian J. Seibel
CPC分类号： H02P21/06 , H02H7/0855
摘要： A frequency control method is incorporated in a motor drive to prevent overcurrent trips when an induction motor is subjected to impact loads or reconnection under load. The drive includes a current regulator loop to control stator current and a voltage regulator loop to control the command to the current regulator. Motor voltage is sensed and a voltage error is developed. This voltage error is processed through a proportional-integral control loop which controls an operating frequency signal to the current regulator. The drive responds during current limit conditions to reduce operating frequency and speed until the current limit conditions subside. The motor can then be re-accelerated up to the desired operating speed.
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公开(公告)号：US09651592B2
公开(公告)日：2017-05-16
申请号：US14095169
申请日：2013-12-03
申请人： Russel J. Kerkman , Ahmed Mohamed Sayed Ahmed , Brian J. Seibel , Shiv Gupta , Prathamesh Ramesh Vadhavkar
发明人： Russel J. Kerkman , Ahmed Mohamed Sayed Ahmed , Brian J. Seibel , Shiv Gupta , Prathamesh Ramesh Vadhavkar
CPC分类号： G01R27/02 , G01R31/028 , G01R31/42
摘要： Impedance detection methods and systems are presented for automatic computation of an electrical component impedance value at one or more specific frequencies of interest using quadrature voltage and current values generated by quadrature tracking filters based on sensed or measured voltage and current signals or values and a base frequency input.
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公开(公告)号：US20150077167A1
公开(公告)日：2015-03-19
申请号：US14551333
申请日：2014-11-24
IPC分类号： H03H11/04
CPC分类号： H03H11/04 , G01R25/00 , H02M1/4233 , H03F1/565 , H03H7/38 , Y02B70/126
摘要： A phase angle detector with a PLL, a power converter, and a method for reducing offsets in an input signal, in which an adaptive offset processor selectively removes a DC offset component from the input signal to generate a modified signal including a fundamental frequency component and higher order harmonics of the input signal with the DC offset component removed, and the PLL provides a phase angle signal at least partially according to the modified signal.
摘要翻译： 具有PLL的相位角检测器，功率转换器和用于减少输入信号中的偏移的方法，其中自适应偏移处理器从输入信号中选择性地去除DC偏移分量，以产生包括基频分量的修正信号， 去除DC偏移分量的输入信号的高阶谐波，并且PLL根据修改的信号至少部分地提供相位角信号。
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公开(公告)号：US20140003102A1
公开(公告)日：2014-01-02
申请号：US13537993
申请日：2012-06-29
CPC分类号： H03H11/04 , G01R25/00 , H02M1/4233 , H03F1/565 , H03H7/38 , Y02B70/126
摘要： A phase angle detector with a PLL, a power converter, and a method for reducing offsets in an input signal, in which an adaptive offset processor selectively removes a DC offset component from the input signal to generate a modified signal including a fundamental frequency component and higher order harmonics of the input signal with the DC offset component removed, and the PLL provides a phase angle signal at least partially according to the modified signal.
摘要翻译： 具有PLL的相位角检测器，功率转换器和用于减少输入信号中的偏移的方法，其中自适应偏移处理器从输入信号中选择性地去除DC偏移分量，以产生包括基频分量的修正信号， 去除DC偏移分量的输入信号的高阶谐波，并且PLL根据修改的信号至少部分地提供相位角信号。
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公开(公告)号：US20130286692A1
公开(公告)日：2013-10-31
申请号：US13570781
申请日：2012-08-09
CPC分类号： H02M1/32 , G01R31/028 , G01R31/42 , H01G4/40 , H02M1/126 , H02M5/4585
摘要： Power conversion systems and methods are presented for detecting input filter capacitor degradation or approach of end of operational life based on filter capacitor current measurements using single and/or dual threshold comparisons for computed instantaneous sum of squares of filter currents or power values.
摘要翻译： 提出了功率转换系统和方法，用于基于滤波电容电流测量来检测输入滤波电容器劣化或使用寿命终止的方法，使用单个和/或双阈值比较来计算滤波器电流或功率值的计算瞬时平方和。
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69.发明申请Phase-Locked-Loop with Quadrature Tracking Filter for Synchronizing an Electric Grid 有权具有用于同步电网的正交跟踪滤波器的锁相环公开(公告)号：US20130120039A1
公开(公告)日：2013-05-16
申请号：US13468941
申请日：2012-05-10
IPC分类号： H03L7/00
CPC分类号： H03L7/00
摘要： Methods and systems for synchronizing an electric grid having unbalanced voltages are provided. A voltage vector may be filtered in a quadrature tracking filter (QTF) to generate a quadrature signal. The inputs to the QTF may be either single input, multiple outputs, or alternatively, multiple inputs, multiple outputs. Furthermore, the second state of either of the two QTF transformations may be either positive or negative. A phase-locked-loop (PLL) operation may be performed on the quadrature signal to monitor a voltage vector between the grid and a connected power converter. The QTF and PLL methods are suitable for either single-phase applications or n-phase (any number of phases) applications.
摘要翻译： 提供了用于使具有不平衡电压的电网同步的方法和系统。 可以在正交跟踪滤波器（QTF）中对电压矢量进行滤波以产生正交信号。 QTF的输入可以是单输入，多输出，也可以是多输入，多输出。 此外，两个QTF变换中的任一个的第二状态可以是正或负。 可以在正交信号上执行锁相环（PLL）操作，以监视电网和连接的功率转换器之间的电压矢量。 QTF和PLL方法适用于单相应用或n相（任意数量级）应用。
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70.发明申请Phase-Locked-Loop with Quadrature Tracking Filter for Synchronizing an Electric Grid 有权具有用于同步电网的正交跟踪滤波器的锁相环公开(公告)号：US20130120038A1
公开(公告)日：2013-05-16
申请号：US13468905
申请日：2012-05-10
IPC分类号： H03L7/00
CPC分类号： H03L7/00
摘要： Methods and systems for synchronizing an electric grid having unbalanced voltages are provided. A voltage vector may be filtered in a quadrature tracking filter (QTF) to generate a quadrature signal. A phase-locked-loop (PLL) operation may be performed on the quadrature signal to monitor a voltage vector between the grid and a connected power converter. The QTF and PLL methods are suitable for either single-phase applications or n-phase (any number of phases) applications. A frequency estimator estimates the grid frequency of the electric grid and outputs the estimated frequency to the QTF algorithms. The frequency estimator may include a three-phase phase-locked-loop (three-phase PLL) suitable for estimating the center frequencies of multiple phases of the electric grid. The frequency estimator may also include means for reducing the harmonics in the grid system.
摘要翻译： 提供了用于使具有不平衡电压的电网同步的方法和系统。 可以在正交跟踪滤波器（QTF）中对电压矢量进行滤波以产生正交信号。 可以在正交信号上执行锁相环（PLL）操作，以监视电网和连接的功率转换器之间的电压矢量。 QTF和PLL方法适用于单相应用或n相（任意数量级）应用。 频率估计器估计电网的电网频率，并将估计频率输出到QTF算法。 频率估计器可以包括适合于估计电网的多个相位的中心频率的三相锁相环（三相PLL）。 频率估计器还可以包括用于减少电网系统中的谐波的装置。
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