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公开(公告)号：US20150153397A1
公开(公告)日：2015-06-04
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.
摘要翻译： 提出了阻抗检测方法和系统，用于使用基于感测或测量的电压和电流信号或值的正交跟踪滤波器产生的正交电压和电流值自动计算感兴趣的一个或多个特定频率处的电气部件阻抗值， 输入。
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2.发明授权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：US08704571B2
公开(公告)日：2014-04-22
申请号：US13468905
申请日：2012-05-10
IPC分类号： H03L7/06
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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公开(公告)号：US20110130993A1
公开(公告)日：2011-06-02
申请号：US12627400
申请日：2009-11-30
摘要： Methods and systems for tracking an electronic signal corresponding to an operating frequency of an electronic component are provided. A method may include sampling the signal to determine previous and current time samples of the signal. A frequency of interest in the signal may also be pre-warped to decrease adverse warping effects resulting from processing signals having relatively higher operating frequencies. The previous and current time samples of the signals, along with the pre-warped frequency of interest, may be input into a digital tracking filter. The digital tracking filter may be configured to execute one or more algorithms on the previous and current time samples and the pre-warped frequency of interest to estimate a current operating frequency.
摘要翻译： 提供了用于跟踪对应于电子部件的工作频率的电子信号的方法和系统。 方法可以包括对信号进行采样以确定信号的先前和当前时间采样。 信号中感兴趣的频率也可以被预先翘曲，以减少由具有相对更高的工作频率的信号产生的不利的翘曲效应。 信号的先前和当前时间样本以及感兴趣的预翘曲频率可以被输入到数字跟踪滤波器中。 数字跟踪滤波器可以被配置为对先前和当前时间采样和感兴趣的预翘曲频率执行一个或多个算法来估计当前工作频率。
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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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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：US08988026B2
公开(公告)日：2015-03-24
申请号：US13563488
申请日：2012-07-31
CPC分类号： H02M5/4585 , H02M1/10 , H02M2001/325 , H02M2007/2195 , H02P27/06 , Y02B70/1408
摘要： Single-phase voltage operation techniques are provided for a three-phase drive system. A drive system may include a rectifier configured to couple to a three-phase AC voltage source. The rectifier may be configured to convert AC voltage from the three-phase AC voltage source to a direct current (DC) voltage. The drive system may also include a controller configured to send a plurality of switching signals to a plurality of switches in the rectifier such that the plurality of switching signals minimizes a current provided to the rectifier when only a single-phase of the three-phase AC voltage source is available.
摘要翻译： 为三相驱动系统提供单相电压操作技术。 驱动系统可以包括被配置为耦合到三相AC电压源的整流器。 整流器可以被配置为将来自三相AC电压源的AC电压转换为直流（DC）电压。 驱动系统还可以包括控制器，该控制器被配置为向整流器中的多个开关发送多个开关信号，使得当只有三相AC的单相时，多个开关信号使提供给整流器的电流最小化 电压源可用。
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公开(公告)号：US08964427B2
公开(公告)日：2015-02-24
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：US20140035492A1
公开(公告)日：2014-02-06
申请号：US13563488
申请日：2012-07-31
CPC分类号： H02M5/4585 , H02M1/10 , H02M2001/325 , H02M2007/2195 , H02P27/06 , Y02B70/1408
摘要： Single-phase voltage operation techniques are provided for a three-phase drive system. A drive system may include a rectifier configured to couple to a three-phase AC voltage source. The rectifier may be configured to convert AC voltage from the three-phase AC voltage source to a direct current (DC) voltage. The drive system may also include a controller configured to send a plurality of switching signals to a plurality of switches in the rectifier such that the plurality of switching signals minimizes a current provided to the rectifier when only a single-phase of the three-phase AC voltage source is available.
摘要翻译： 为三相驱动系统提供单相电压操作技术。 驱动系统可以包括被配置为耦合到三相AC电压源的整流器。 整流器可以被配置为将来自三相AC电压源的AC电压转换为直流（DC）电压。 驱动系统还可以包括控制器，该控制器被配置为向整流器中的多个开关发送多个开关信号，使得当只有三相AC的单相时，多个开关信号使提供给整流器的电流最小化 电压源可用。
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9.发明授权公开(公告)号：US06720748B1
公开(公告)日：2004-04-13
申请号：US10365216
申请日：2003-02-12
申请人： Brian J. Seibel , Russel J. Kerkman
发明人： Brian J. Seibel , Russel J. Kerkman
IPC分类号： H02P700
CPC分类号： H02P21/16
摘要： A method for use with an adjustable frequency controller to deliver current to an electromagnetic load including a stator and a rotor, the method for identifying a flux current estimate and comprising the steps of (a) identifying a rated torque value; (b) providing an initial q-axis current estimate; (c) using the q-axis current estimate to identify a d-axis current estimate; (d) mathematically combining the d-axis current estimate and the q-axis current estimate to identify a torque estimate; (e) comparing the rated torque value to the torque estimate; (f) where the torque estimate is similar to the rated torque value skipping to step (i); (g) altering the q-axis current estimate; (h) repeating steps (c) through (f); and (i) storing the d-axis and q-axis current estimates as flux and torque current values for subsequent use.
摘要翻译： 一种与可变频率控制器一起使用以将电流传递到包括定子和转子的电磁负载的方法，用于识别通量电流估计的方法，并且包括以下步骤：（a）识别额定转矩值; （b）提供初始q轴电流估计; （c）使用q轴电流估计来识别d轴电流估计; （d）在数学上组合d轴电流估计和q轴电流估计以识别扭矩估计; （e）将额定转矩值与转矩估计进行比较; （f）其中扭矩估计类似于跳至步骤（i）的额定转矩值; （g）改变q轴当前估计值; （h）重复步骤（c）至（f）; 和（i）将d轴和q轴电流估计值存储为随后使用的通量和转矩电流值。
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10.发明授权
公开(公告)号：US6014007A
公开(公告)日：2000-01-11
申请号：US163107
申请日：1998-09-29
CPC分类号： H02P21/34
摘要： A method and apparatus for starting a motor drive into a rotating motor, the method including determining an initial search frequency and search current wherein the current is less than a rated drive current, providing a d-axis flux generating current to the motor at the search frequency and at a magnitude equal to the search current, monitoring a q-axis flux error, decreasing the search frequency until the d-axis flux error is less than a threshold value, thereafter increasing the search current to the rated drive current and, after a flux-up period, providing both q-axis torque producing current and d-axis flux producing current to the motor.
摘要翻译： 一种用于启动电动机驱动进入旋转电动机的方法和装置，所述方法包括确定初始搜索频率和搜索电流，其中电流小于额定驱动电流，在搜索时向电动机提供d轴磁通发生电流 频率和等于搜索电流的幅度，监测q轴磁通误差，减小搜索频率，直到d轴磁通误差小于阈值，然后将搜索电流增加到额定驱动电流，之后 向电动机提供q轴转矩产生电流和d轴磁通产生电流的磁通上升期。
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