公开(公告)号：US5821656A

公开(公告)日：1998-10-13

申请号：US500718

申请日：1995-07-11

申请人： Roy S. Colby ,  Zbigniew Piech

发明人： Roy S. Colby ,  Zbigniew Piech

IPC分类号： F16C32/04 ,  F16C39/06 ,  H02K7/09

CPC分类号： F16C32/0459 ,  F16C32/048

摘要： A magnetic bearing with reduced control-flux-induced rotor loss includes a rotor 14, and a stator 12 having a plurality of slots S1-S16 around which coils 150-156 of a first Phase A and coils 160-166 of a second Phase B are wound. The winding configuration provides a two pole magnetic field around a rotor/stator gap 15 which is sinusoidal and which can be directed to any location along the gap 15. The configuration minimizes discontinuities or sharp changes in control flux in the gap which thereby reduces rotor losses. Also, the stator tooth gap g1 is minimized to provide smooth flux distribution along the rotor/stator gap 15. More phases and more or less stator slots may be used.

摘要翻译： 具有减小的控制磁通转子损失的磁轴承包括转子14和具有多个槽S1-S16的定子12，第一相A的线圈150-156和第二相B的线圈160-166 是伤口。 绕组配置提供围绕正弦曲线的转子/定子间隙15周围的两极磁场，其可以被引导到沿着间隙15的任何位置。该构造使间隙中的控制通量中的不连续性或急剧变化最小化，从而减少转子损耗 。 此外，定子齿隙g1被最小化以沿着转子/定子间隙15提供平滑的通量分布。可以使用更多相和更多或更少的定子槽。

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：US07112898B2

公开(公告)日：2006-09-26

申请号：US10058863

申请日：2002-01-28

申请人： Scott R. Brown ,  Mark J. Kocher ,  Roy S. Colby ,  Robert J. Dwulet ,  Timothy B Phillips

发明人： Scott R. Brown ,  Mark J. Kocher ,  Roy S. Colby ,  Robert J. Dwulet ,  Timothy B Phillips

IPC分类号： H02J1/00

CPC分类号： H02M7/2176 ,  H02M3/156 ,  H02M2001/0022 ,  H02M2003/1555 ,  Y10T307/826

摘要： An economical digital voltage sag compensator for overcoming sags in distributed electrical power. The voltage sag compensator employs an inexpensive micro-controller, a full wave bridge rectifier, a DC power supply, a voltage divider and an output switch. The micro-controller continuously monitors and evaluates, with respect to a setpoint measured in volt-seconds, the rectified DC voltage. At regularly spaced trigger events, as determined by the micro-controller, the micro-controller concurrently monitors the rectified DC voltage, evaluates the monitored voltage with respect to the setpoint, produces an output signal and sends that output signal to the output switch. The output switch supplies an electrical device, connected electrically in series with the full wave bridge rectifier and the output switch, with a constant average current of sufficient level to maintain the electrical device in a desired operating condition. The constant average current is obtained by applying constant volt-seconds to the electrical device. The circuit also provides overvoltage protection to the electrical device.

公开(公告)号：US5814774A

公开(公告)日：1998-09-29

申请号：US626749

申请日：1996-03-29

申请人： Timothy M. Remmers ,  Randall K. Roberts ,  Rajesh Rajamani ,  Roy S. Colby

发明人： Timothy M. Remmers ,  Randall K. Roberts ,  Rajesh Rajamani ,  Roy S. Colby

IPC分类号： B60L13/08 ,  B66B1/06 ,  B66B7/04 ,  B66B11/02 ,  F16C39/06 ,  B66B1/34

CPC分类号： F16C32/0451 ,  B60L13/08 ,  B66B7/044 ,  B60L2200/26

摘要： The invention provides an elevator system for controlling movement of an elevator car with respect to guide rails in an elevator hoistway, having a force-estimation or position-scheduled current command controller and a magnet driver circuit without the need for a flux sensor. The force-estimation or position-scheduled current command controller responds to a force command signal, and further responds to a sensed gap signal, for providing a force-estimation or position-scheduled current command controller signal as a current command to the magnet driver circuit. The magnet driver circuit responds to the force-estimation or position-scheduled current command controller signal, for providing a magnet driver circuit signal to control said horizontal movement of the elevator car with respect to the guide rail in the elevator hoistway, whereby the horizontal movement of the elevator car is controlled without sensing magnetic flux. Other applications include any system that uses an electromagnet to produce an attractive or repulsive force across a large air gap, such as magnetic levitation trains or shuttles, and magnetic bearings.

摘要翻译： 本发明提供一种用于控制电梯轿厢相对于电梯井道中的导轨的运动的电梯系统，其具有力估计或位置调度的电流指令控制器和磁驱动器电路，而不需要磁通传感器。 力估计或位置调度电流指令控制器响应于力指令信号，并进一步响应感测到的间隙信号，以向磁铁驱动器电路提供力估计或位置调度的电流指令控制器信号作为电流指令 。 磁驱动器电路响应于力估计或位置调度电流指令控制器信号，用于提供磁体驱动器电路信号以控制电梯轿厢相对于电梯井道中的导轨的水平运动，由此水平运动 在不感测磁通的情况下控制电梯轿厢。 其他应用包括使用电磁铁在大气隙（例如磁悬浮列车或梭子）和磁性轴承上产生有吸引力或排斥力的任何系统。

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。