中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

76 records (took 0.016 seconds)

    Rotor resistance adaptation for indirect field oriented control of induction machine
    11.
    发明授权
    Rotor resistance adaptation for indirect field oriented control of induction machine 有权
    感应电机间接磁场定向控制的转子电阻适应

    公开(公告)号：US06870348B2

    公开(公告)日：2005-03-22

    申请号：US10635214

    申请日：2003-08-06

    Applicant: Milan S. Mijalkovic ,  Aleksandar M. Stankovic ,  Silva Hiti ,  James M. Nagashima

    Inventor： Milan S. Mijalkovic ,  Aleksandar M. Stankovic ,  Silva Hiti ,  James M. Nagashima

    IPC: H02P5/28 ,  H02P7/36

    CPC classification number: H02P21/141 ,  H02P21/16 ,  H02P2207/01

    Abstract: An induction machine includes a rotor having rotor flux and a rotor resistance. The induction machine outputs first and second reference current values. A control system includes a first controller that outputs first and second reference voltage values to the induction machine and that generates an estimated rotor flux magnitude value based on a rotor resistance parameter. A computation circuit receives the first and second reference current values from the induction machine and the first and second voltage reference values from the first controller and calculates an actual rotor flux magnitude. A rotor resistance adjustor that updates the rotor resistance parameter based on the actual and estimated rotor flux magnitudes.

    Abstract translation: 感应电机包括具有转子磁通和转子电阻的转子。 感应电机输出第一和第二参考电流值。 控制系统包括：第一控制器，其将第一和第二参考电压值输出到感应电机，并且基于转子电阻参数产生估计的转子磁通量值。 计算电路从感应电机接收第一和第二参考电流值，并从第一控制器接收第一和第二参考电压值，并计算实际转子磁通量。 转子电阻调节器，其基于实际和估计的转子磁通量值来更新转子电阻参数。

    Utilizing zero-sequence switchings for reversible converters
    12.
    发明授权
    Utilizing zero-sequence switchings for reversible converters 失效
    利用可逆转换器的零序切换

    公开(公告)号：US06831442B2

    公开(公告)日：2004-12-14

    申请号：US10189823

    申请日：2002-07-03

    Applicant: John S. Hsu ,  Gui-Jia Su ,  Donald J. Adams ,  James M. Nagashima ,  Constantin Stancu ,  Douglas S. Carlson ,  Gregory S. Smith

    Inventor： John S. Hsu ,  Gui-Jia Su ,  Donald J. Adams ,  James M. Nagashima ,  Constantin Stancu ,  Douglas S. Carlson ,  Gregory S. Smith

    IPC: H02P534

    CPC classification number: H02M7/5387 ,  H02M7/53875 ,  H02M2001/009

    Abstract: A method for providing additional dc inputs or outputs (49, 59) from a dc-to-ac inverter (10) for controlling motor loads (60) comprises deriving zero-sequence components (Vao, Vbo, and Vco) from the inverter (10) through additional circuit branches with power switching devices (23, 44, 46), transforming the voltage between a high voltage and a low voltage using a transformer or motor (42, 50), converting the low voltage between ac and dc using a rectifier (41, 51) or an H-bridge (61), and providing at least one low voltage dc input or output (49, 59). The transformation of the ac voltage may be either single phase or three phase. Where less than a 100% duty cycle is acceptable, a two-phase modulation of the switching signals controlling the inverter (10) reduces switching losses in the inverter (10). A plurality of circuits for carrying out the invention are also disclosed.

    Abstract translation: 从用于控制电动机负载（60）的dc-to-ac逆变器（10）提供额外的直流输入或输出（49,59）的方法包括从逆变器（Vao，Vbo和Vco）导出零序分量 10）通过具有电力开关装置（23,44,46）的附加电路分支，使用变压器或电动机（42,50）在高电压和低电压之间转换电压，使用一个 整流器（41,51）或H桥（61），并且提供至少一个低压直流输入或输出（49,59）。 交流电压的变换可以是单相或三相。 在小于100％占空比是可接受的情况下，控制逆变器（10）的开关信号的两相调制降低了逆变器（10）中的开关损耗。 还公开了用于实施本发明的多个电路。

    Charging energy sources with a rectifier using double-ended inverter system
    14.
    发明授权
    Charging energy sources with a rectifier using double-ended inverter system 有权
    使用双端逆变器系统的整流器充电能源

    公开(公告)号：US08058830B2

    公开(公告)日：2011-11-15

    申请号：US12136636

    申请日：2008-06-10

    Applicant: George John ,  Sibaprasad Chakrabarti ,  Brian A. Welchko ,  Gregory S. Smith ,  James M. Nagashima ,  Milun Perisic

    Inventor： George John ,  Sibaprasad Chakrabarti ,  Brian A. Welchko ,  Gregory S. Smith ,  James M. Nagashima ,  Milun Perisic

    IPC: H02P1/00

    CPC classification number: B60L11/1868 ,  Y02T10/7005 ,  Y02T10/7066

    Abstract: Systems and methods are provided for charging energy sources with a rectifier using a double-ended inverter system. An apparatus is provided for an electric drive system for a vehicle. The electric drive system comprises an electric motor configured to provide traction power to the vehicle. A first inverter is coupled to the electric motor and is configured to provide alternating current to the electric motor. A first energy source is coupled to the first inverter, wherein the first inverter is configured to provide power flow between the first energy source and the electric motor. A second inverter is coupled to the electric motor and is configured to provide alternating current to the electric motor. A rectifier is coupled to the second inverter and configured to produce a direct current output. The second inverter is configured to provide power from the rectifier to the electric motor.

    Abstract translation: 提供了系统和方法，用于使用双端逆变器系统对整流器充电能量源。 一种用于车辆的电驱动系统的装置。 电驱动系统包括被配置为向车辆提供牵引力的电动马达。 第一逆变器耦合到电动机并且被配置为向电动机提供交流电。 第一能量源耦合到第一逆变器，其中第一逆变器被配置为在第一能量源和电动机之间提供功率流。 第二逆变器耦合到电动机并且被配置为向电动机提供交流电。 整流器耦合到第二反相器并且被配置为产生直流输出。 第二逆变器被配置成从整流器向电动机提供电力。

    Cooling systems and methods for integration electric motor-inverters
    15.
    发明授权
    Cooling systems and methods for integration electric motor-inverters 有权
    集成电动机逆变器的冷却系统和方法

    公开(公告)号：US07723874B2

    公开(公告)日：2010-05-25

    申请号：US12032359

    申请日：2008-02-15

    Applicant: George R. Woody ,  Karl D. Conroy ,  James M. Nagashima ,  David F. Nelson ,  Eric R. Ostrom ,  Gregory S. Smith

    Inventor： George R. Woody ,  Karl D. Conroy ,  James M. Nagashima ,  David F. Nelson ,  Eric R. Ostrom ,  Gregory S. Smith

    IPC: H02K9/00

    CPC classification number: H02K9/20

    Abstract: Cooling systems and methods are provided for an integrated electric motor-inverter, where the integrated electric motor-inverter includes a housing, a motor, and an inverter, the motor and the inverter are disposed within the housing, and the motor includes a stator. The system includes a cooling jacket, a first coolant, a condenser, a spray head, and a second coolant. The cooling jacket is disposed concentric to the stator and includes an inner wall and an outer wall. The inner wall is in direct contact with the stator. The first coolant is disposed between the cooling jacket inner and outer walls. The condenser is disposed concentric to the cooling jacket. The spray head is disposed adjacent the inverter. The second coolant is in flow communication with the spray head.

    Abstract translation: 为集成电动机 - 逆变器提供冷却系统和方法，其中集成电动机 - 逆变器包括壳体，电动机和逆变器，电动机和逆变器设置在壳体内，并且电动机包括定子。 该系统包括冷却套，第一冷却剂，冷凝器，喷头和第二冷却剂。 冷却套与所述定子同心地设置，并且包括内壁和外壁。 内壁与定子直接接触。 第一冷却剂设置在冷却套内壁和外壁之间。 冷凝器与冷却套筒同心设置。 喷头靠近逆变器设置。 第二冷却剂与喷头流体连通。

    High power permanent magnet alternator with improved controlled output
    17.
    发明授权
    High power permanent magnet alternator with improved controlled output 有权
    大功率永磁发电机具有改进的控制输出

    公开(公告)号：US07521905B2

    公开(公告)日：2009-04-21

    申请号：US11531403

    申请日：2006-09-13

    Applicant: Brian Welchko ,  Gregory S. Smith ,  James M. Nagashima

    Inventor： Brian Welchko ,  Gregory S. Smith ,  James M. Nagashima

    IPC: H02H7/06 ,  H02P9/00 ,  H02P11/00

    CPC classification number: H02P9/006 ,  H02J7/1461 ,  H02P2101/45

    Abstract: Apparatus, systems, and methods are provided for reducing a potentially damaging high voltage fault condition in an alternator system. The apparatus comprises a motor, a rectifier coupled to the motor, an output node coupled to the rectifier, and a switch coupled between the rectifier and the output node, wherein the switch is a normally “on” switch. The system includes the apparatus implemented into a vehicle comprising an engine to drive the apparatus and a battery coupled to the apparatus, wherein the apparatus provides current to the battery. The method includes the steps of providing current from a rectifier of the alternator to a battery coupled to the rectifier and ceasing to provide current to the battery if a damaging event occurs, wherein the ceasing step comprises the step of switching OFF a normally “on” switch coupled between the rectifier and the battery if a damaging event occurs.

    Abstract translation: 提供装置，系统和方法用于减少交流发电机系统中潜在的有害的高压故障状况。 该装置包括电动机，耦合到电动机的整流器，耦合到整流器的输出节点和耦合在整流器和输出节点之间的开关，其中开关是正常的“开”开关。 该系统包括实施到车辆中的装置，其包括驱动装置的发动机和耦合到该装置的电池，其中该装置向电池提供电流。 该方法包括以下步骤：将交流发电机的整流器的电流提供给耦合到整流器的电池，并且如果发生损坏事件则停止向电池提供电流，其中停止步骤包括将正常“接通” 如果发生破坏性事件，则在整流器和电池之间连接开关。

    Cooling arrangements for integrated electric motor-inverters
    20.
    发明授权
    Cooling arrangements for integrated electric motor-inverters 有权
    集成电动机 - 逆变器的冷却装置

    公开(公告)号：US07210304B2

    公开(公告)日：2007-05-01

    申请号：US11054483

    申请日：2005-02-09

    Applicant: James M. Nagashima ,  Karl D. Conroy ,  Eric R. Ostrom ,  Gregory S. Smith ,  George John ,  David Tang ,  Terence G. Ward

    Inventor： James M. Nagashima ,  Karl D. Conroy ,  Eric R. Ostrom ,  Gregory S. Smith ,  George John ,  David Tang ,  Terence G. Ward

    IPC: F23D23/12

    CPC classification number: F28D15/00 ,  B60K6/26 ,  B60K2001/003 ,  F28D15/0266 ,  H02K9/19 ,  H02K11/33 ,  H05K7/20936

    Abstract: In order to provide a modular arrangement, an inverter for an electric traction motor used to drive an automotive vehicle is positioned in proximity with the traction motor. The inverter is located within a compartment adjacent to one end of the electric traction motor and is cooled in a closed system by spraying a liquid coolant directly onto the inverter. The liquid coolant absorbs heat from the inverter and is cooled by a heat exchange arrangement comprising a reservoir with pipes carrying a second coolant from the radiator of the automotive vehicle. In a preferred embodiment, the coolant is collected from the inverter in an annular reservoir that is integral with the compartment containing the inverter. In accordance with one embodiment of the cooling arrangement, heat from the inverter vaporizes the liquid coolant by absorbing heat from the inverter during a phase change from a liquid to a vapor. The vaporized coolant is condensed by a circulating second coolant in pipes connected to the vehicle's radiator through a condenser that is preferably coaxial with the motor and the annular reservoir, which annular reservoir in the second embodiment collects overspray liquid coolant. In order to avoid degrading the inverter, the coolant is a dielectric fluid.

    Abstract translation: 为了提供模块化布置，用于驱动机动车辆的电动牵引电动机的逆变器位于牵引电动机附近。 逆变器位于与电力牵引电动机的一端相邻的隔室内，并通过将液体冷却剂直接喷射到逆变器上而在封闭系统中冷却。 液体冷却剂从逆变器吸收热量，并且通过热交换装置来冷却，所述热交换装置包括具有从机动车辆的散热器承载第二冷却剂的管道的储存器。 在优选实施例中，冷却剂从与逆变器的隔室成一整体的环形容器中从逆变器收集。 根据冷却装置的一个实施例，来自逆变器的热量在从液体到蒸汽的相变期间通过吸收来自逆变器的热量来蒸发液体冷却剂。 蒸发的冷却剂通过连接到车辆散热器的管道中的循环第二冷却剂冷凝，该冷凝器优选地与电动机和环形储存器同轴，该第二实施例中的环形储存器收集过量喷射的液体冷却剂。 为了避免降低变频器，冷却剂是介质流体。

Patent Agency Ranking