公开(公告)号：US20120153935A1

公开(公告)日：2012-06-21

申请号：US13388556

申请日：2011-10-15

申请人： Zhi Gao ,  Larry A. Turner ,  Benoit Leprettre ,  Roy S. Colby

发明人： Zhi Gao ,  Larry A. Turner ,  Benoit Leprettre ,  Roy S. Colby

IPC分类号： G01P3/46

CPC分类号： H02P23/14 ,  G01R31/343 ,  H02P21/18 ,  H02P2203/09 ,  H02P2207/01

摘要： A method and apparatus to dynamically and adaptively demodulate induction motor instantaneous rotor slot harmonic frequency for line-connected squirrel-cage polyphase induction motors. The instantaneous rotor slot harmonic frequency carries essential information on the instantaneous rotor speed. Based on a correlation between the motor's input power and its rotor slot harmonic frequency, a dynamically varying carrier frequency is computed and used in a rotor slot harmonic frequency detector. The rotor slot harmonic frequency detector is based on a superheterodyne principle. It contains a generalized linear-phase low-pass filter, whose bandwidth is estimated dynamically by a filter bandwidth estimator. The rotor slot harmonic frequency detector also includes a latency compensator, which receives the dynamically varying carrier frequency signal and synchronizes it with the output of a frequency demodulator.

摘要翻译： 一种用于线路连接的鼠笼式多相感应电动机动态和自适应地解调感应电动机瞬时转子槽谐波频率的方法和装置。 瞬时转子槽谐波频率载有瞬时转子转速的基本信息。 基于电机输入功率与转子槽谐波频率之间的相关性，计算出动态变化的载波频率并在转子槽谐波频率检测器中使用。 转子槽谐波检波器基于超外差原理。 它包含一个广义线性相位低通滤波器，其带宽由滤波器带宽估计器动态估计。 转子槽谐波频率检测器还包括延迟补偿器，其接收动态变化的载波频率信号并将其与频率解调器的输出同步。

公开(公告)号：US20110145674A1

公开(公告)日：2011-06-16

申请号：US12798767

申请日：2010-04-09

申请人： Zhi Gao

发明人： Zhi Gao

IPC分类号： H03M13/05 ,  G06F11/10

CPC分类号： H04L1/0009

摘要： A system and method for error correction coding is configured to dynamically implement one of a number of error correction coding methods during a transmission of data. The error correction coding method is selected based on a measured bit error rate during the transmission of data. The implementation of the error correction coding method is performed without interrupting the data transmission.

摘要翻译： 用于纠错编码的系统和方法被配置为在数据传输期间动态地实现多个纠错编码方法之一。 基于在传输数据期间测量的比特误码率来选择纠错编码方法。 在不中断数据传输的情况下执行纠错编码方法。

公开(公告)号：US20110142165A1

公开(公告)日：2011-06-16

申请号：US12924884

申请日：2010-10-07

申请人： Zhi Gao

发明人： Zhi Gao

IPC分类号： H04L25/03

CPC分类号： H04L25/085 ,  H04L1/003 ,  H04L1/203

摘要： A system and method for transmitting data. The system and method is configured to dynamically implement one of a differential signaling method or a single-ended signaling method during a transmission of data. The signaling method is selected based on a measured interference level during the transmission of data. The implementation of the signaling method is performed without interrupting the data transmission.

摘要翻译： 一种用于传输数据的系统和方法。 该系统和方法被配置为在传输数据期间动态地实现差分信令方法或单端信令方法之一。 基于在传输数据期间的测量干扰电平来选择信令方法。 在不中断数据传输的情况下执行信令方法的实现。

公开(公告)号：US20080117336A1

公开(公告)日：2008-05-22

申请号：US11944236

申请日：2007-11-21

申请人： Zhi Gao

发明人： Zhi Gao

IPC分类号： H04N5/50

CPC分类号： H04N21/2365 ,  H04N7/17318 ,  H04N21/4331 ,  H04N21/4347 ,  H04N21/4384 ,  H04N21/6125 ,  H04N21/6405

摘要： Methods and systems for fast channel changing and for auxiliary channel generating are disclosed. The system for fast channel changing includes: an auxiliary channel generating unit, configured to generate one or more auxiliary channels corresponding to target channel and send video data of the one or more auxiliary channels; a client device, configured to receive video data from the target channel or from the one or more auxiliary channels; a video data receiving controller, configured to detect the video data received by the client device from the target channel or from the one or more auxiliary channels, and send a message of terminating receiving the video data from one of the target channel and the one or more auxiliary channels to the client device. That's the way to change channel fast, and the way occupies little resource of the network, and with little extra cost to be implemented.

摘要翻译： 公开了用于快速信道改变和辅助信道生成的方法和系统。 用于快速信道改变的系统包括：辅助信道生成单元，用于生成与目标信道相对应的一个或多个辅助信道，并发送一个或多个辅助信道的视频数据; 客户端设备，被配置为从所述目标信道或所述一个或多个辅助信道接收视频数据; 视频数据接收控制器，被配置为从所述目标信道或所述一个或多个辅助信道中检测由所述客户端设备接收的视频数据，并且发送终止从所述目标信道和所述目标信道之一接收所述视频数据的消息， 更多的辅助通道到客户端设备。 这是快速改变频道的方式，占用网络资源的方式少，而且实现的费用也不多。

公开(公告)号：US08756313B2

公开(公告)日：2014-06-17

申请号：US13300569

申请日：2011-11-19

申请人： Dakui Zhou ,  Zhi Gao

发明人： Dakui Zhou ,  Zhi Gao

IPC分类号： G06F15/173 ,  G06F17/30 ,  H04L29/08

CPC分类号： G06F17/30899 ,  H04L67/26

摘要： A method is disclosed for notifying a user of network resource updates for a terminal with a browser. The method includes identifying a plurality of network resources from multiple sources to be dynamically monitored and dynamically monitoring the identified network resources based on a trigger mechanism. The method also includes determining whether there are updates in the monitored network resources and, when it is determined that there are updates in the monitored network resources, notifying the user according to a preset update notification means and the multiple sources of updated network resources.

摘要翻译： 公开了一种用于向用户通知具有浏览器的终端的网络资源更新的方法。 该方法包括从多个源识别多个网络资源以进行动态监控，并基于触发机制动态地监视所识别的网络资源。 该方法还包括确定所监视的网络资源中是否存在更新，以及当确定在所监视的网络资源中存在更新时，根据预设的更新通知装置和多个更新的网络资源来通知用户。

公开(公告)号：US08601120B2

公开(公告)日：2013-12-03

申请号：US13300654

申请日：2011-11-20

申请人： Zhi Gao ,  Xiaochuan Wang

发明人： Zhi Gao ,  Xiaochuan Wang

IPC分类号： G06F15/173

CPC分类号： H04L67/26 ,  G06F17/3089 ,  H04L47/822

摘要： An update notification method is provided. The method includes taking snapshots of a network resource and capturing specific contents of the network resource. The method also includes comparing specific contents of two consecutive snapshots of the network resource and, if there is a change in the specific contents of the network resource, notifying a user that contents of the network resource have been updated.

摘要翻译： 提供更新通知方法。 该方法包括拍摄网络资源的快照并捕获网络资源的特定内容。 该方法还包括比较网络资源的两个连续快照的特定内容，如果网络资源的特定内容发生变化，则通知用户网络资源的内容已被更新。

公开(公告)号：US08332163B2

公开(公告)日：2012-12-11

申请号：US13343833

申请日：2012-01-05

申请人： Larry A. Turner ,  Roy S. Colby ,  Zhi Gao

发明人： Larry A. Turner ,  Roy S. Colby ,  Zhi Gao

IPC分类号： G01N31/00

CPC分类号： H02P23/14 ,  G01R31/343

摘要： Methods of determining a quantity of rotor slots in an induction motor are disclosed. An approximate slip is calculated according to an approximate slip function. A fundamental frequency is calculated from a representation of the voltage signal. A saliency frequency is calculated from a representation of the current signal. For each rotor slots index in a set of rotor slots indices, a slip estimate is calculated according to a slip estimation function. A slip estimation error signal is calculated. A rotor slots performance surface representative of an aggregate of the slip estimation error signals is calculated. A rotor slots quantity equal to the rotor slots index corresponding to a minimum of the rotor slots performance surface over at least a portion of the set of the rotor slots indices is defined.

摘要翻译： 公开了确定感应电动机中转子槽数量的方法。 根据近似滑移函数计算近似滑差。 根据电压信号的表示计算基频。 根据当前信号的表示计算显着频率。 对于一组转子槽索引中的每个转子槽索引，根据滑动估计函数计算滑移估计。 计算滑移估计误差信号。 计算代表滑移估计误差信号的集合的转子槽性能表面。 限定了与转子槽索引的至少一部分上的转子槽性能表面的最小值相对应的等于转子槽索引的转子槽数量。

公开(公告)号：US08102140B2

公开(公告)日：2012-01-24

申请号：US12268831

申请日：2008-11-11

申请人： Zhi Gao ,  Larry A. Turner ,  Roy S. Colby

发明人： Zhi Gao ,  Larry A. Turner ,  Roy S. Colby

IPC分类号： H02P23/14

CPC分类号： H02P23/14 ,  G01R31/343 ,  H02P2207/01

摘要： A method and apparatus to provide estimates of electrical parameters for line-connected induction motors during either steady-state or dynamic motor operations. The electrical parameters are calculated from the motor nameplate data and voltage and current measurements. No speed sensors or electronic injection circuits are needed. The method can be divided into 4 major steps. First, complex space vectors are synthesized from voltage and current measurements. Second, the instantaneous rotor speed is detected by calculating the rotational speed of a single rotor slot harmonic component with respect to the rotational speed of the fundamental frequency component. Third, the positive sequence fundamental frequency components are extracted from complex space vectors. Finally, least-squares estimates of the electrical parameters are determined from a dynamic induction motor equivalent circuit model.

摘要翻译： 一种用于在稳态或动态电动机操作期间提供线路连接的感应电动机的电参数的估计的方法和装置。 电气参数根据电机铭牌数据和电压和电流测量值计算。 不需要速度传感器或电子注入电路。 该方法可分为4个主要步骤。 首先，从电压和电流测量中合成复杂的空间矢量。 第二，通过计算单个转子槽谐波分量相对于基频分量的转速的转速来检测瞬时转子速度。 第三，从复杂的空间矢量中提取正序基频分量。 最后，从动态感应电动机等效电路模型确定电参数的最小二乘估计。

公开(公告)号：US09231512B2

公开(公告)日：2016-01-05

申请号：US13388556

申请日：2011-10-15

申请人： Zhi Gao ,  Larry A. Turner ,  Benoit Leprettre ,  Roy S. Colby

发明人： Zhi Gao ,  Larry A. Turner ,  Benoit Leprettre ,  Roy S. Colby

IPC分类号： G01P3/46 ,  H02P23/14 ,  G01R31/34 ,  H02P21/14

CPC分类号： H02P23/14 ,  G01R31/343 ,  H02P21/18 ,  H02P2203/09 ,  H02P2207/01

摘要： A method and apparatus to dynamically and adaptively demodulate induction motor instantaneous rotor slot harmonic frequency for line-connected squirrel-cage polyphase induction motors. The instantaneous rotor slot harmonic frequency carries essential information on the instantaneous rotor speed. Based on a correlation between the motor's input power and its rotor slot harmonic frequency, a dynamically varying carrier frequency is computed and used in a rotor slot harmonic frequency detector. The rotor slot harmonic frequency detector is based on a superheterodyne principle. It contains a generalized linear-phase low-pass filter, whose bandwidth is estimated dynamically by a filter bandwidth estimator. The rotor slot harmonic frequency detector also includes a latency compensator, which receives the dynamically varying carrier frequency signal and synchronizes it with the output of a frequency demodulator.

摘要翻译： 一种用于线路连接的鼠笼式多相感应电动机动态和自适应地解调感应电动机瞬时转子槽谐波频率的方法和装置。 瞬时转子槽谐波频率载有瞬时转子转速的基本信息。 基于电机输入功率与转子槽谐波频率之间的相关性，计算出动态变化的载波频率并在转子槽谐波频率检测器中使用。 转子槽谐波检波器基于超外差原理。 它包含一个广义线性相位低通滤波器，其带宽由滤波器带宽估计器动态估计。 转子槽谐波频率检测器还包括延迟补偿器，其接收动态变化的载波频率信号并将其与频率解调器的输出同步。

公开(公告)号：US08373379B2

公开(公告)日：2013-02-12

申请号：US12909589

申请日：2010-10-21

申请人： Zhi Gao ,  Larry A. Turner ,  Roy S. Colby

发明人： Zhi Gao ,  Larry A. Turner ,  Roy S. Colby

IPC分类号： H02P23/00

CPC分类号： G01R31/343 ,  H02P23/14

摘要： Methods and devices are presented herein for estimating induction motor inductance parameters based on instantaneous reactive power. The induction motor inductance parameters, e.g., the stator inductance and the total leakage factor, can be estimated from motor nameplate data and instantaneous reactive power without involving speed sensors or electronic injection circuits. In one embodiment, the method includes: measuring voltages and currents; converting the measured voltages and currents into discrete-time voltage and current samples by analog-to-digital converters; synthesizing a complex voltage from the discrete-time voltage samples; synthesizing a complex current from the discrete-time current samples; acquiring and storing motor nameplate data; detecting instantaneous rotor speed by calculating an instantaneous rotor slot harmonic frequency with respect to an instantaneous fundamental frequency; calculating, via an induction motor inductance estimator, the motor's instantaneous reactive power and other intermediate quantities; and outputting the stator inductance and the total leakage factor.

摘要翻译： 本文介绍了基于瞬时无功功率估计感应电动机电感参数的方法和装置。 可以从马达铭牌数据和瞬时无功功率估计感应电动机电感参数，例如定子电感和总泄漏因子，而不涉及速度传感器或电子注入电路。 在一个实施例中，该方法包括：测量电压和电流; 通过模拟 - 数字转换器将测量的电压和电流转换成离散时间的电压和电流采样; 从离散时间电压样本合成复合电压; 从离散时间电流样本合成复电流; 获取和存储电机铭牌数据; 通过相对于瞬时基频计算瞬时转子槽谐波频率来检测瞬时转子速度; 通过感应电动机电感估计器计算电动机的瞬时无功功率和其他中间量; 并输出定子电感和总泄漏因子。