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：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：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。

公开(公告)号：US20120123755A1

公开(公告)日：2012-05-17

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： G06F17/50

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：US08035322B2

公开(公告)日：2011-10-11

申请号：US12268771

申请日：2008-11-11

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

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

IPC分类号： H02P1/54

CPC分类号： H02P23/14 ,  G01R31/343

摘要： A method of determining a slip estimate associated with an induction motor through analysis of voltage and current signals. A fundamental frequency is calculated from a representation (e.g., complex representation) of the voltage signal, and a saliency frequency is calculated from a representation of the current signal. An estimation of slip quantity is calculated according to a slip estimation function that includes the saliency frequency, a saliency order, the fundamental frequency, a quantity of rotor slots, and a quantity of poles of the motor.

摘要翻译： 一种通过分析电压和电流信号来确定与感应电机相关联的滑差估计的方法。 根据电压信号的表示（例如，复数表示）计算基本频率，并且根据当前信号的表示来计算显着性频率。 根据包括显着性频率，显着顺序，基频，转子槽数和电机极数的滑差估计函数计算滑差量的估计。

公开(公告)号：US20090284204A1

公开(公告)日：2009-11-19

申请号：US12268819

申请日：2008-11-11

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

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

IPC分类号： G01R27/08

CPC分类号： H02P29/66 ,  H02P21/16 ,  H02P23/14 ,  H02P2207/01

摘要： A method and apparatus to provide continuous and reliable rotor temperature estimates for line-connected induction motors during steady-state and/or dynamic motor operations. Rotor temperature is calculated from voltage and current measurements without any temperature or speed sensors. 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. Fourth, the rotor time constant is estimated in a model-reference adaptive system based on a dynamic induction motor equivalent circuit model. Finally, the rotor temperature is calculated according to the linear relationship between the rotor temperature and the estimated rotor time constant. Real-time induction motor thermal protection is achieved through this continuous tracking of the rotor temperature.

摘要翻译： 一种用于在稳态和/或动态电动机操作期间为线路连接的感应电动机提供连续且可靠的转子温度估计的方法和装置。 转子温度由没有任何温度或速度传感器的电压和电流测量计算。 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。 第四，基于动态感应电动机等效电路模型的模型参考自适应系统中估计转子时间常数。 最后，转子温度根据转子温度与转子时间常数之间的线性关系来计算。 通过对转子温度的连续跟踪，可实现实时感应电动机的热保护。

公开(公告)号：US20090284212A1

公开(公告)日：2009-11-19

申请号：US12268771

申请日：2008-11-11

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

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

IPC分类号： H02P23/14 ,  G01P3/44

CPC分类号： H02P23/14 ,  G01R31/343

摘要： A method of determining a slip estimate associated with an induction motor through analysis of voltage and current signals. A fundamental frequency is calculated from a representation (e.g., complex representation) of the voltage signal, and a saliency frequency is calculated from a representation of the current signal. An estimation of slip quantity is calculated according to a slip estimation function that includes the saliency frequency, a saliency order, the fundamental frequency, a quantity of rotor slots, and a quantity of poles of the motor.

摘要翻译： 一种通过分析电压和电流信号来确定与感应电机相关联的滑差估计的方法。 根据电压信号的表示（例如，复数表示）计算基本频率，并且根据当前信号的表示来计算显着性频率。 根据包括显着性频率，显着顺序，基频，转子槽数和电机极数的滑差估计函数计算滑差量的估计。

公开(公告)号：US20090284211A1

公开(公告)日：2009-11-19

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。