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163 条记录 (耗时 0.062 秒)

    ELECTRIC MACHINE WINDING ARRANGEMENT
    22.
    发明申请
    ELECTRIC MACHINE WINDING ARRANGEMENT 有权
    电机绕组布置

    公开(公告)号：US20090212653A1

    公开(公告)日：2009-08-27

    申请号：US12434808

    申请日：2009-05-04

    申请人： Feng Liang ,  Michael Degner

    发明人： Feng Liang ,  Michael Degner

    IPC分类号： H02K3/28

    CPC分类号： H02K3/28 ,  F01L9/04 ,  F01L2009/0436 ,  F01L2009/0448 ,  H02K3/34 ,  H02K7/09

    摘要： Rotational electric machine stator winding arrangement characterized, inter alia, by at least one coil of each parallel circuit being discontinuous with the other coils of the corresponding circuit, and by coils configured to accept phase voltage not being adjacent coils having a point at the lowest potential of a corresponding circuit.

    摘要翻译： 旋转电机定子绕组布置，其特征在于，每个并联电路的至少一个线圈与对应电路的其它线圈不连续，并且被配置为接受不是具有最低电位点的相邻线圈的相位电压 的相应电路。

    Self repairing cement compositions and methods of using same
    23.
    发明授权
    Self repairing cement compositions and methods of using same 有权
    自修水泥组合物及其使用方法

    公开(公告)号：US07530396B1

    公开(公告)日：2009-05-12

    申请号：US12107416

    申请日：2008-04-22

    申请人： B. Raghava Reddy ,  Feng Liang ,  Russell M. Fitzgerald ,  David Meadows

    发明人： B. Raghava Reddy ,  Feng Liang ,  Russell M. Fitzgerald ,  David Meadows

    IPC分类号： E21B33/13

    CPC分类号： C09K8/467 ,  C04B24/163 ,  C04B24/2641 ,  C04B24/2652 ,  C04B24/2676 ,  C04B24/42

    摘要： A method of servicing a wellbore comprising placing a cement composition comprising a cementitious material, water, and an elastomeric material comprising a bonding polar group into a wellbore, and allowing the cement composition to set to form a set cement, wherein the elastomeric material has a phase transition temperature, exhibits cold flow behavior, or both at less than or equal to the bottom hole static temperature of the wellbore. A method of servicing a cased wellbore penetrating a formation, comprising introducing a self-repairing cementitious material into a wellbore, and allowing the cement to set, wherein upon a loss of structural integrity the set cement self-repairs, and wherein the loss of structural integrity comprises the formation of flow pathways for fluid migration in the cement and self-repair comprises obstructing potential pathways for fluid migration.

    摘要翻译： 一种维修井孔的方法，包括将包含粘结极性基团的水泥组合物，水和包含粘结极性基团的弹性体材料的水泥组合物放置在井眼中，并且允许水泥组合物凝固形成固定水泥，其中弹性体材料具有 相转变温度，表现出冷流行为，或两者都小于或等于井眼的井底静态温度。 一种对穿透地层的套管井眼进行维修的方法，包括将自修复的水泥质材料引入井眼中，并允许水泥固化，其中，在失去结构完整性的情况下，固定水泥自修复，并且其中结构损失 完整性包括形成用于水泥中流体迁移的流动路径，并且自我修复包括阻碍流体迁移的潜在途径。

    Electrical machine drive method and system
    25.
    发明授权
    Electrical machine drive method and system 有权
    电机驱动方式及系统

    公开(公告)号：US06683435B1

    公开(公告)日：2004-01-27

    申请号：US10064218

    申请日：2002-06-21

    申请人： Feng Liang ,  Henry Heping Huang ,  Michael W. Degner

    发明人： Feng Liang ,  Henry Heping Huang ,  Michael W. Degner

    IPC分类号： H02P736

    CPC分类号： B60L3/0023

    摘要： An electrical machine drive system (100) includes a DC power source (102), an inverter (104) and a three-phase electrical machine (106). In response to a fault condition, power switches (122, 124) in the inverter are opened. Any short circuits are then determined by examining the phase currents of the three-phase electrical machine. If short circuits are found in the inverter, then the inverter is made balanced by shorting all upper braches (122, 126) or all lower branches (124, 128), depending on the location of the short circuit. Torque ripples are avoided by balancing the circuit during the fault mode, thereby providing comfort to a user of an electric or hybrid electric vehicle employing the electrical machine drive system.

    摘要翻译： 电机驱动系统（100）包括直流电源（102），逆变器（104）和三相电机（106）。 响应于故障状态，逆变器中的电源开关（122,124）打开。 然后通过检查三相电机的相电流来确定任何短路。 如果在逆变器中发现短路，则根据短路的位置，通过使所有上部支架（122,126）或所有下部支路（124,128）短路来使逆变器平衡。 通过在故障模式期间平衡电路来避免扭矩波纹，从而为采用电机驱动系统的电动或混合动力电动车辆的使用者提供舒适感。

    Doubly salient variable reluctance machine with stationary permanent magnets or auxiliary field windings
    26.
    发明授权
    Doubly salient variable reluctance machine with stationary permanent magnets or auxiliary field windings 失效
    具有固定永磁体或辅助励磁绕组的双凸极可变磁阻电机

    公开(公告)号：US5672925A

    公开(公告)日：1997-09-30

    申请号：US514495

    申请日：1995-08-11

    申请人： Thomas A. Lipo ,  Yuefeng Liao ,  Feng Liang

    发明人： Thomas A. Lipo ,  Yuefeng Liao ,  Feng Liang

    IPC分类号： H02K19/10 ,  H02K19/24 ,  H02K21/38 ,  H02K29/00 ,  H02K21/26 ,  H02K1/00 ,  H02K1/12 ,  H02K17/42

    CPC分类号： H02K19/103 ,  H02K19/24 ,  H02K21/44 ,  H02K29/03

    摘要： A new class of doubly-salient machines which incorporates a specific stator/rotor pole arrangement to provide a linearly increasing flux linkage over the entire area of pole overlap, and either (1) stationary permanent magnets mounted in the stator, or (2) one or more auxiliary field windings coiled about the stator or (3) a combination of stationary permanent magnets and auxiliary field windings. In each of the three cases, the permanent magnets or auxiliary winding(s) generate the primary flux and block and thereby limit flux in the ordinary path of the secondary flux (due to the stator windings) through the stator. The altered magnetic structure utilizing four stator and six rotor poles increases efficiency when operated as a generator, and provides greater output torque when operated as a motor.

    摘要翻译： 一种新型的双重显着机器，其结合了特定的定子/转子磁极布置，以在磁极重叠的整个区域上提供线性增加的磁通，以及（1）安装在定子中的固定永磁体，或（2）一个 或更多的围绕定子卷绕的辅助励磁绕组，或（3）固定永磁体和辅助励磁绕组的组合。 在三种情况下，永磁体或辅助绕组中的每一种产生主要磁通和阻挡，从而限制通过定子的次级磁通（由于定子绕组）的通常路径中的磁通。 使用四个定子和六个转子磁极的改变的磁结构在作为发电机运行时提高效率，并且当作为电动机操作时提供更大的输出转矩。

    Field weakening for a doubly salient motor with stator permanent magnets
    28.
    发明授权
    Field weakening for a doubly salient motor with stator permanent magnets 失效
    具有定子永磁体的双凸极电机的磁场弱化

    公开(公告)号：US5455473A

    公开(公告)日：1995-10-03

    申请号：US17833

    申请日：1993-02-16

    申请人： Thomas A. Lipo ,  Yuefeng Liao ,  Feng Liang

    发明人： Thomas A. Lipo ,  Yuefeng Liao ,  Feng Liang

    IPC分类号： H02K1/17 ,  H02K19/06 ,  H02K19/24 ,  H02K21/00 ,  H02K21/16 ,  H02K21/20 ,  H02K21/38 ,  H02K29/00 ,  H02K37/24 ,  H02P25/08 ,  H02K16/00

    CPC分类号： H02K21/028 ,  H02K19/24 ,  H02K21/16 ,  H02K21/20 ,  H02K21/44 ,  H02K29/03 ,  H02P25/08

    摘要： A device for field weakening in a doubly-salient variable reluctance motor having permanent magnets in the stator. The field weakening increases the constant power range of the motor and is accomplished by controlled movement of steel insets toward and away from the sides of the stator proximate the permanent magnets to provide a controllable by-pass flux path thereabout. Alternatively, the field weakening may be accomplished by a flux by-pass collar which may be angularly positioned around the stator to bridge the permanent magnets of the motor with discrete magnetic sections, thereby providing an alternate by-pass flux path around the permanent magnets in addition to the main air gap flux path. A third alternative means for maintaining a constant power range is accomplished by controlled axial sliding of the permanent magnets themselves into and out from the stator.

    摘要翻译： 在定子中具有永磁体的双重可变磁阻电动机中的弱磁化装置。 磁场弱化增加了电动机的恒定功率范围，并且通过钢芯插入件朝向和远离定子的靠近永磁体的侧面的受控移动来实现，以在其周围提供可控的旁路磁通路径。 或者，磁场弱化可以通过磁通旁通轴环实现，其可以围绕定子成角度地定位，以用离散磁性部分桥接电动机的永磁体，从而在永磁体周围提供交替的旁路磁通路径 除了主气隙磁通路径。 用于维持恒定功率范围的第三替代方案是通过将永久磁体自身进入和离开定子的受控轴向滑动来实现的。

    Methods of enhancing the conductivity of propped fractures with in-situ acidizing
    30.
    发明授权
    Methods of enhancing the conductivity of propped fractures with in-situ acidizing 有权
    通过原位酸化提高支撑骨折导电性的方法

    公开(公告)号：US09562425B2

    公开(公告)日：2017-02-07

    申请号：US13717900

    申请日：2012-12-18

    申请人： Philip D. Nguyen ,  Feng Liang ,  Thomas D. Welton ,  Christopher Parton

    发明人： Philip D. Nguyen ,  Feng Liang ,  Thomas D. Welton ,  Christopher Parton

    IPC分类号： E21B21/14 ,  E21B43/26 ,  C09K8/72

    CPC分类号： E21B43/26 ,  C09K8/72

    摘要： Methods of treating subterranean formations comprising providing a wellbore in a subterranean formation having at least one fracture therein; providing a first treatment fluid comprising a base fluid and an acid generating inert agent; providing a second treatment fluid comprising a base fluid, and an acid generating activator; introducing the first treatment fluid into the at least one fracture; and introducing the second treatment fluid into the at least one fracture, wherein the acid generating inert agent in the first treatment fluid reacts with the acid generating activator in the second treatment fluid so as to generate an acid in the at least one fracture and create or enhance at least one microfracture therein.

    摘要翻译： 处理地下地层的方法，包括在其中具有至少一个裂缝的地层中提供井眼; 提供包含基础流体和产生酸的惰性剂的第一处理流体; 提供包含基础流体和产酸活化剂的第二处理流体; 将所述第一处理流体引入所述至少一个裂缝中; 以及将所述第二处理流体引入到所述至少一个裂缝中，其中所述第一处理流体中的产生酸的惰性剂与所述第二处理流体中的产酸活化剂反应，以在所述至少一个裂缝中产生酸，并产生或 增强其中的至少一个微裂缝。