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61 条记录 (耗时 0.034 秒)

    Rotor magnet placement in interior permanent magnet machines
    51.
    发明授权
    Rotor magnet placement in interior permanent magnet machines 有权
    转子磁铁放置在内置永磁机

    公开(公告)号：US07474029B2

    公开(公告)日：2009-01-06

    申请号：US10867402

    申请日：2004-06-14

    申请人： Khwaja M. Rahman ,  James M. Nagashima

    发明人： Khwaja M. Rahman ,  James M. Nagashima

    IPC分类号： H02K21/12 ,  H02K1/27

    CPC分类号： H02K1/2766

    摘要： A machine includes a stator and a rotor having a plurality of poles. Each pole is formed at least in part by a plurality of permanent magnets recessed within the rotor at a predetermined distance from an outer surface of the rotor. The distance is predetermined to minimize rotor flux variation near the outer surface during rotation of the rotor relative to the stator. Eddy current losses are thereby reduced.

    摘要翻译： 机器包括定子和具有多个极的转子。 每个极至少部分地由在转子内凹入预定距离的转子的外表面处的多个永磁体形成。 该距离是预定的，以使转子相对于定子旋转期间的外表面附近的转子磁通变化最小化。 从而减小涡流损耗。

    Current regulator and current control method and system for AC motors
    56.
    发明授权
    Current regulator and current control method and system for AC motors 有权
    交流电机的电流调节器和电流控制方法及系统

    公开(公告)号：US07843162B2

    公开(公告)日：2010-11-30

    申请号：US12048071

    申请日：2008-03-13

    申请人： Bonho Bae ,  Nitinkumar R. Patel ,  Steven E. Schulz ,  James M. Nagashima ,  Jung Sik Yim ,  Seung Ki Sul

    发明人： Bonho Bae ,  Nitinkumar R. Patel ,  Steven E. Schulz ,  James M. Nagashima ,  Jung Sik Yim ,  Seung Ki Sul

    IPC分类号： H02P27/04

    CPC分类号： H02P21/22

    摘要： Methods and systems are provided for controlling an AC motor via an inverter. The method includes determining a delay-compensated offset based on a synchronous frame current, producing a current error based on a synchronous frame current and a commanded current, producing a voltage error based on an anti-windup offset and the current error, producing a commanded voltage based on the delay-compensated offset and the voltage error, and providing the inverter with the commanded voltage.

    摘要翻译： 提供了用于通过逆变器控制AC电动机的方法和系统。 该方法包括基于同步帧电流确定延迟补偿的偏移，基于同步帧电流和指令电流产生电流误差，产生基于抗饱和偏移和当前误差的电压误差，产生命令 基于延迟补偿偏移和电压误差的电压，并向逆变器提供指令电压。

    Method and system for improved thermal management of a voltage source inverter operating at low output frequency utilizing a zero vector modulation technique
    57.
    发明授权
    Method and system for improved thermal management of a voltage source inverter operating at low output frequency utilizing a zero vector modulation technique 有权
    利用零向量调制技术改进以低输出频率工作的电压源逆变器的热管理方法和系统

    公开(公告)号：US07061134B2

    公开(公告)日：2006-06-13

    申请号：US10632257

    申请日：2003-08-01

    申请人： Silva Hiti ,  Constantin C. Stancu ,  Khwaja Rahman ,  Scott D. Downer ,  James M. Nagashima ,  Eric R. Ostrom

    发明人： Silva Hiti ,  Constantin C. Stancu ,  Khwaja Rahman ,  Scott D. Downer ,  James M. Nagashima ,  Eric R. Ostrom

    IPC分类号： H02P9/04 ,  H02P5/34

    CPC分类号： H02P27/12 ,  H02M7/5387 ,  H02M2001/0054 ,  H02M2007/53876 ,  Y02B70/1491

    摘要： The present invention includes a method for thermal management in a voltage source inverter. The method includes sensing a low output frequency condition, determining a zero vector modulation responsive to the sensed low output frequency condition, and applying the determined zero vector modulation to reduce thermal stress in the voltage source inverter. The step of determining the zero vector modulation responsive to the sensed low output frequency condition includes mapping an output voltage requirement to a space vector structure and determining state switching space vectors based on the mapped output voltage requirement. The step of determining the state switching space vector includes determining active state switching space vectors associated with the state switching space vectors, determining duty cycles for the active state switching space vectors based on the active state switching space vectors, and determining a duty cycle for at least one zero state switching space vector based on the determined duty cycles of the active state switching space vectors and a switching period.

    摘要翻译： 本发明包括电压源逆变器中的热管理方法。 该方法包括感测低输出频率条件，响应于感测的低输出频率条件确定零矢量调制，以及应用所确定的零矢量调制以减小电压源逆变器中的热应力。 响应于感测的低输出频率条件来确定零矢量调制的步骤包括将输出电压需求映射到空间矢量结构，并且基于映射的输出电压要求来确定状态切换空间矢量。 确定状态切换空间矢量的步骤包括确定与状态切换空间矢量相关联的活动状态切换空间矢量，基于活动状态切换空间矢量确定活动状态切换空间矢量的占空比，以及确定在 基于确定的活动状态切换空间矢量的占空比和切换周期的至少一个零状态切换空间矢量。

    Position sensor fault tolerant control for automotive propulsion system
    58.
    发明授权
    Position sensor fault tolerant control for automotive propulsion system 有权
    汽车推进系统的位置传感器容错控制

    公开(公告)号：US07002318B1

    公开(公告)日：2006-02-21

    申请号：US10948630

    申请日：2004-09-23

    申请人： Steven E. Schulz ,  Sean E Gleason ,  Nitinkumar R. Patel ,  James M. Nagashima ,  Yu-Seok Jeong ,  Seung Ki Sul ,  Michael Milani

    发明人： Steven E. Schulz ,  Sean E Gleason ,  Nitinkumar R. Patel ,  James M. Nagashima ,  Yu-Seok Jeong ,  Seung Ki Sul ,  Michael Milani

    IPC分类号： H02P7/50 ,  B80L3/00

    CPC分类号： B60L3/0038 ,  H02P2203/05 ,  Y02T10/642

    摘要： A control system for a motor including a rotor comprises a sensorless sensor module that includes a saliency-based estimator module that generates a first rotor position signal based on saliency and a back electromotive force (emf) estimator module that generates a second rotor position signal based on back emf. A selector selects the first rotor position signal for rotor speeds below a first rotor speed and the second rotor position signal for rotor speeds above the first rotor speed. A rotor position sensor senses a position of the rotor and generates a third rotor position signal. A fault detection module senses faults in the rotor position sensor and outputs the third rotor position signal when a fault is not detected and one of the first and second rotor position signals when the fault is detected. An indirect field oriented control (IFOC) system controls the motor based on a selected one of the first, second and third rotor position signals.

    摘要翻译： 一种用于包括转子的电动机的控制系统包括无传感器传感器模块，其包括基于显着性产生第一转子位置信号的基于显着的估计器模块和产生基于第二转子位置信号的反电动势（emf）估计器模块 在后面emf 选择器选择转子速度低于第一转子速度的第一转子位置信号和用于转子速度高于第一转子速度的第二转子位置信号。 转子位置传感器感测转子的位置并产生第三转子位置信号。 当检测到故障时，故障检测模块检测转子位置传感器中的故障并输出第三转子位置信号，当检测到故障时，第一和第二转子位置信号中的一个。 间接磁场定向控制（IFOC）系统基于第一，第二和第三转子位置信号中选定的一个来控制电动机。

    Position sensorless control algorithm for AC machine
    59.
    发明授权
    Position sensorless control algorithm for AC machine 有权
    交流电机无位置传感器控制算法

    公开(公告)号：US06894454B2

    公开(公告)日：2005-05-17

    申请号：US10268503

    申请日：2002-10-10

    申请人： Nitinkumar R. Patel ,  Steven E. Schulz ,  James M. Nagashima ,  Seung Ki Sul ,  Yo-Chan Son ,  Bon-Ho Bae

    发明人： Nitinkumar R. Patel ,  Steven E. Schulz ,  James M. Nagashima ,  Seung Ki Sul ,  Yo-Chan Son ,  Bon-Ho Bae

    IPC分类号： H02P21/00 ,  H02P1/46 ,  H02P6/18 ,  H02P27/04

    CPC分类号： H02P21/00 ,  H02P21/26 ,  H02P21/32

    摘要： A control system for an electric motor including an inverter for providing power to the electric motor, a controller for controlling the inverter, a first motor speed control block in the controller injecting a high frequency signal into the electric motor to determine the speed and position of the electric motor, a second motor speed control block in the controller detecting the back electromotive force to determine the speed and position of the electric motor, and a transition control block in said controller to vary operation between the first motor speed control block and the second motor speed control block.

    摘要翻译： 一种用于电动机的控制系统，包括用于向电动机提供电力的逆变器，用于控制逆变器的控制器，控制器中的第一电动机速度控制块，将高频信号注入电动机以确定速度和位置 所述电动机，所述控制器中的第二电动机速度控制块检测所述反电动势以确定所述电动机的速度和位置;以及所述控制器中的转换控制块，以改变所述第一电动机速度控制块和所述第二电动机速度控制块之间的操作 电机速度控制块。