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    Method and system for improved thermal management of a voltage source inverter operating at low output frequency utilizing a zero vector modulation technique
    1.
    发明申请
    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：US20050024902A1

    公开(公告)日：2005-02-03

    申请号：US10632257

    申请日：2003-08-01

    申请人： Silva Hiti ,  Constantin Stancu ,  Khwaja Rahman ,  Scott Downer ,  James Nagashima ,  Eric Ostrom

    发明人： Silva Hiti ,  Constantin Stancu ,  Khwaja Rahman ,  Scott Downer ,  James Nagashima ,  Eric Ostrom

    IPC分类号： H02M7/5387 ,  H02P27/12 ,  H02M5/45

    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。

    Cooling arrangements for integrated electric motor-inverters
    2.
    发明申请
    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：US20060174642A1

    公开(公告)日：2006-08-10

    申请号：US11054483

    申请日：2005-02-09

    申请人： James Nagashima ,  Karl Conroy ,  Eric Ostrom ,  Gregory Smith ,  George John ,  David Tang ,  Terence Ward

    发明人： James Nagashima ,  Karl Conroy ,  Eric Ostrom ,  Gregory Smith ,  George John ,  David Tang ,  Terence Ward

    IPC分类号： F25B1/00 ,  F25D15/00 ,  F25B49/00 ,  F25D23/12 ,  F28D5/00

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

    摘要： 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.

    摘要翻译： 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喷液体冷却剂。 为了避免降低变频器，冷却剂是介质流体。