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24 条记录 (耗时 0.024 秒)

    Integrating fluxgate for magnetostrictive torque sensors
    1.
    发明授权
    Integrating fluxgate for magnetostrictive torque sensors 失效
    集成磁致伸缩扭矩传感器的磁通门

    公开(公告)号：US06871553B2

    公开(公告)日：2005-03-29

    申请号：US10402620

    申请日：2003-03-28

    申请人： Malakondaiah Naidu ,  Joseph Pierre Heremans ,  Thomas Wolfgang Nehl ,  John R. Smith ,  Brian K Fuller

    发明人： Malakondaiah Naidu ,  Joseph Pierre Heremans ,  Thomas Wolfgang Nehl ,  John R. Smith ,  Brian K Fuller

    IPC分类号： G01L3/02 ,  G01L3/10

    CPC分类号： G01L3/102 ,  G01L3/105

    摘要： A torque sensing apparatus for picking up a magnetic field of a magnetostrictive material disposed on a shaft, the torque sensing apparatus having: a first integrating ring; a second integrating ring; a first fluxgate return strip and a second fluxgate return strip each being connected to the first integrating ring at one end and the second integrating ring at the other end; an excitation coil; and a feedback coil; wherein the first integrating ring and the second integrating ring are configured to be positioned to pick up flux signals along the entire periphery of the ends of the magnetostrictive material.

    摘要翻译： 一种用于拾取设置在轴上的磁致伸缩材料的磁场的转矩传感装置，所述扭矩感测装置具有：第一积分环; 第二整合环; 第一磁通门返回带和第二磁通门返回带，每个第一磁通门返回带在一端连接到第一积分环，在另一端连接到第二积分环; 励磁线圈; 和反馈线圈; 其中所述第一积分环和所述第二积分环被配置为沿着所述磁致伸缩材料的端部的整个周边拾取通量信号。

    Assembly for measuring movement of and a torque applied to a shaft
    2.
    发明授权
    Assembly for measuring movement of and a torque applied to a shaft 失效
    用于测量施加到轴的运动和扭矩的组件

    公开(公告)号：US07024946B2

    公开(公告)日：2006-04-11

    申请号：US10763499

    申请日：2004-01-23

    申请人： Thomas Wolfgang Nehl ,  Thomas Hubert Van Steenkiste ,  John R. Smith ,  Brian K Fuller ,  Avoki M. Omekanda ,  Donald T. Morelli ,  Joseph V. Mantese

    发明人： Thomas Wolfgang Nehl ,  Thomas Hubert Van Steenkiste ,  John R. Smith ,  Brian K Fuller ,  Avoki M. Omekanda ,  Donald T. Morelli ,  Joseph V. Mantese

    IPC分类号： G01L3/10

    CPC分类号： G01L3/102 ,  G01L3/103

    摘要： The subject invention provides an assembly for measuring movement of and a torque applied to a shaft extending between first and second ends and being hollow, specifically for measuring rotation and twisting of the shaft. A permanent magnet is disposed within the shaft for producing a parallel magnetic field emanating radially from the shaft. A sensor mechanism is positioned adjacent the shaft to detect the magnetic flux produced in response to the shaft being moved. The sensor mechanism includes a magnetostrictive (MR) material disposed annularly about the shaft and extends between first and second edges. A flux collector extends beyond the first and second edges of the magnetostrictive material to direct the magnetic flux through a Hall sensor to detect an axial component of the magnetic flux in response to twisting. A positional ring extends annularly around and spaced from the shaft and a positional sensor is disposed between the positional ring and the shaft for measuring a radial component of the magnetic flux in response to rotating.

    摘要翻译： 本发明提供了一种用于测量施加到在第一和第二端之间延伸并且是中空的轴的转矩和扭矩的组件，具体地用于测量轴的旋转和扭转。 永磁体设置在轴内，用于产生从轴径向发出的平行磁场。 传感器机构定位在轴附近，以检测响应于轴被移动产生的磁通量。 传感器机构包括围绕轴设置成环状并在第一和第二边缘之间延伸的磁致伸缩（MR）材料。 磁通收集器延伸超出磁致伸缩材料的第一和第二边缘，以引导磁通量通过霍尔传感器，以响应于扭转来检测磁通量的轴向分量。 位置环围绕轴线环绕并且间隔开，并且位置传感器设置在位置环和轴之间，用于响应于旋转来测量磁通量的径向分量。

    Accessory motor drive power supply system for an electric vehicle
    3.
    发明授权
    Accessory motor drive power supply system for an electric vehicle 有权
    电动汽车附件电机驱动电源系统

    公开(公告)号：US06404150B1

    公开(公告)日：2002-06-11

    申请号：US09604439

    申请日：2000-06-27

    申请人： Thomas Wolfgang Nehl ,  Malakondaiah Naidu ,  Avoki Omekanda ,  Anita B. Rao ,  Lateef A. Kajouke ,  Mark M. Osugi

    发明人： Thomas Wolfgang Nehl ,  Malakondaiah Naidu ,  Avoki Omekanda ,  Anita B. Rao ,  Lateef A. Kajouke ,  Mark M. Osugi

    IPC分类号： H02P768

    CPC分类号： B60L1/00 ,  B60L2210/10 ,  Y02T10/7216

    摘要： An electric vehicle accessory motor drive power supply system (40) that utilizes a single power supply design to provide efficient variable speed motor control to both brushless and brush-type DC motors (42,44). The power supply system includes at least one of each type of motor along with a first DC-DC converter (46) that provides operating power to the brushless motor (42) and a second DC-DC converter (48) that provides operating power to the brush-type motor (44). Both converters (46,48) have a power input (52) connected to the electric vehicle's high voltage bus (50) and each includes a data input (54) for receiving a speed control signal (SC) indicative of desired motor speed, as well as an output (56) for providing a motor drive signal to its associated DC motor (42,44). Each of the converters (46,48) is operable in response to its received speed control signal to convert operating power from the high voltage bus (50) into a lower voltage variable motor drive signal that is provided to its associated motor (42,44) via its output (56). The variable drive signal can be either a variable DC voltage signal or a pulse-width modulated signal. With this arrangement, a single converter design, including a single speed control interface, can be utilized to operate both brush-type and brushless motors. Furthermore, the system permits more efficient operation of the brushless motors since it obviates the need for speed control electronics on the motor itself and therefore eliminates the relatively inefficient use of cascaded PWM stages.

    摘要翻译： 一种电动车辆附件电动机驱动电源系统（40），其利用单个电源设计为无刷和直流电动机（42,44）提供有效的变速电动机控制。 电源系统包括每种类型的电动机中的至少一个以及向无刷电动机（42）提供工作电力的第一DC-DC转换器（46）和向第一DC-DC转换器（48）提供工作电力的第二DC-DC转换器 刷式电动机（44）。 两个转换器（46,48）都具有连接到电动汽车的高压总线（50）的电力输入（52），并且每个转换器包括用于接收指示期望的电动机速度的速度控制信号（SC）的数据输入（54），如 以及用于向其相关联的DC电动机（42,44）提供电动机驱动信号的输出（56）。 每个转换器（46,48）响应于其接收到的速度控制信号而工作，以将来自高压总线（50）的操作功率转换成提供给其相关联的电动机（42,44）的较低电压可变电动机驱动信号 ）通过其输出（56）。 可变驱动信号可以是可变直流电压信号或脉冲宽度调制信号。 通过这种布置，可以使用包括单个速度控制接口的单个​​转换器设计来操作电刷型和无刷电动机。 此外，该系统允许无刷电动机的更有效的操作，因为它消除了对电动机本身上的速度控制电子装置的需要，因此消除了级联PWM级的相对低效的使用。

    Method and apparatus for torque control of a machine
    4.
    发明授权
    Method and apparatus for torque control of a machine 有权
    一种用于机器转矩控制的方法和装置

    公开(公告)号：US06566829B1

    公开(公告)日：2003-05-20

    申请号：US09656903

    申请日：2000-09-07

    申请人： Malakondaiah Naidu ,  Rassem Ragheb Henry ,  Thomas Wolfgang Nehl

    发明人： Malakondaiah Naidu ,  Rassem Ragheb Henry ,  Thomas Wolfgang Nehl

    IPC分类号： H02P700

    CPC分类号： H02P6/28

    摘要： An exemplary embodiment of the invention is a method for torque control of a PM synchronous machine. The method includes obtaining a torque command signal and a machine speed and determining an operating mode in response to the torque command signal and the machine speed. The operating mode includes a first operating mode and a second operating mode. In the first operating mode, a stator phase voltage magnitude is computed and an angle between the stator phase voltage and a stator phase back emf is determined in response to the stator phase voltage magnitude. In the second operating mode, the stator phase voltage is set to a predetermined magnitude and the angle between the stator phase voltage and the stator phase back emf is determined in response to the predetermined magnitude.

    摘要翻译： 本发明的示例性实施例是一种用于PM同步机的转矩控制的方法。 该方法包括获得扭矩指令信号和机器速度，并且响应于转矩指令信号和机器速度来确定操作模式。 操作模式包括第一操作模式和第二操作模式。 在第一操作模式中，计算定子相位电压幅度，并且响应于定子相电压幅值来确定定子相电压和定子相位电动势之间的角度。 在第二操作模式中，定子相位电压被设定为预定的大小，并且响应于预定的大小来确定定子相位电压和定子相位电动势之间的角度。

    System and method for controlling load dump voltage of a permanent magnet (PM) alternator
    5.
    发明授权
    System and method for controlling load dump voltage of a permanent magnet (PM) alternator 失效

    公开(公告)号：US06664768B2

    公开(公告)日：2003-12-16

    申请号：US09862236

    申请日：2001-05-21

    申请人： Malakondaiah Naidu ,  Thomas Wolfgang Nehl

    发明人： Malakondaiah Naidu ,  Thomas Wolfgang Nehl

    IPC分类号： H02P910

    CPC分类号： H02J7/1461 ,  H02H7/067 ,  H02P9/00 ,  H02P9/102

    摘要： An apparatus for controlling the load dump voltage of a permanent magnet (PM) alternator having a silicon controlled rectifier (SCR) bridge. The apparatus includes a voltage divider, a peak detector, and a comparator. The voltage divider attenuates the bridge output voltage, which is further fed through a peak detector to hold the peak value for improved stability. The comparator changes states when the bridge output exceeds a predetermined voltage level (e.g., 55 volts) that is less than the load dump threshold limit (e.g., 60 volts), but greater than the normal operating voltage (e.g., 42 volts). The comparator output change-in-state deactivates a gate pulse generator, thereby suppressing further operation of the SCR bridge. Voltage transients that may otherwise occur at the bridge output for the remainder portion of a half cycle from the PM alternator are clamped using a varistor or zener diode.

    Method for controlling a permanent magnet motor
    6.
    发明授权
    Method for controlling a permanent magnet motor 失效
    永磁电机控制方法

    公开(公告)号：US06605912B1

    公开(公告)日：2003-08-12

    申请号：US09104488

    申请日：1998-06-25

    申请人： Aravind Sourirajan Bharadwaj ,  Fang Deng ,  Thomas Wolfgang Nehl ,  Malakondaiah Naidu

    发明人： Aravind Sourirajan Bharadwaj ,  Fang Deng ,  Thomas Wolfgang Nehl ,  Malakondaiah Naidu

    IPC分类号： H02P750

    CPC分类号： H02P21/0089 ,  H02P6/15 ,  H02P2209/07

    摘要： A three region control strategy for a permanent magnet motor is presented. In a first control region, the permanent magnet motor is operated at, a 120° conduction square wave mode at reduced phase current, and below a no-load speed. The motor phase current commutation causes eddy current losses in the rotor magnets and core which are insignificant due to the low phase currents and relatively low rotor speed. Meanwhile, the inverter switching losses are kept low as two switches are in use (on/off) for each current commutation during the 120° conduction mode. In a second control region, the permanent magnet motor is operated at a 180° conduction sinusoidal wave mode with high phase currents. The 180° conduction sinusoidal wave mode minimizes the commutation loss. In a third control region, the permanent magnet motor is operated above its no-load speed or in a field weakening mode. At these higher speeds the slot ripple and commutation losses on the rotor increase, and the demagnetizing component of the armature reaction increases due to field weakening. Commutation losses are minimized through sinusoidal current operation. In the field weakening mode, the phase current conduction angle is set to 180° and the phase currents become sinusoidal.

    摘要翻译： 介绍了永磁电动机的三区控制策略。 在第一控制区域中，永磁电动机以相对于减小的相电流在120°导通方波模式下工作，并且低于空载速度。 电动机相电流换向导致转子磁体和磁芯中的涡流损耗由于低相电流和相对较低的转子转速而不显着。 同时，在120°导通模式期间，对于每个电流换向，两个开关正在使用（开/关），逆变器开关损耗保持较低。 在第二控制区域中，永磁电动机在具有高相电流的180°导通正弦波模式下操作。 180°导通正弦波模式使换向损耗最小化。 在第三控制区域中，永磁电动机在空载速度或弱磁模式下运转。 在这些更高的速度下，转子上的槽波动和换向损耗增加，并且由于磁场弱化，电枢反应的退磁分量增加。 通过正弦电流操作使换向损耗最小化。 在弱磁模式中，相电流导通角设定为180°，相电流变为正弦。

    Extended speed range operation of permanent magnet brushless machines using optimal phase angle control in the voltage mode operation
    7.
    发明授权
    Extended speed range operation of permanent magnet brushless machines using optimal phase angle control in the voltage mode operation 有权
    永磁无刷电机的扩展速度范围运行在电压模式运行中采用最佳相位角控制

    公开(公告)号：US06373211B1

    公开(公告)日：2002-04-16

    申请号：US09664178

    申请日：2000-09-18

    申请人： Rassem Ragheb Henry ,  Thomas Wolfgang Nehl ,  Nady Boules ,  Malakondaiah Naidu

    发明人： Rassem Ragheb Henry ,  Thomas Wolfgang Nehl ,  Nady Boules ,  Malakondaiah Naidu

    IPC分类号： H02P701

    CPC分类号： H02P6/10 ,  B62D5/046 ,  H02P6/06 ,  H02P6/08 ,  H02P6/17 ,  H02P21/22

    摘要： A voltage mode control method and apparatus for extending speed range operation from a sinusoidally excited permanent magnet motor is described. The method includes a determination of a maximum value from a first set of parameters with each parameter having a known maximum value as well as a reading of a second set of parameters. A computation of a first derived angle using the first set of parameters and the second set of parameters is then performed. A computation of amplitude of phase voltage and a second derived angle using the first derived angle follows. A resultant output comprising a set of derived command voltages for controlling a power circuit is created whereby the power circuit can achieve required torque levels with lower currents for power switches.

    摘要翻译： 描述了用于从正弦激励永磁电动机延伸速度范围操作的电压模式控制方法和装置。 该方法包括从第一组参数确定最大值，每个参数具有已知的最大值以及第二组参数的读数。 然后执行使用第一组参数和第二组参数的第一导出角的计算。 以下是使用第一导出角度的相位电压的振幅和第二导出角度的计算。 产生包括用于控制电源电路的一组导出的指令电压的结果输出，由此电力电路可以实现用于功率开关的较低电流所需的转矩水平。