公开(公告)号：US07145268B2

公开(公告)日：2006-12-05

申请号：US10335683

申请日：2002-12-31

申请人： John Edwards ,  Longya Xu ,  Brij B. Bhargava

发明人： John Edwards ,  Longya Xu ,  Brij B. Bhargava

IPC分类号： H02B1/24

CPC分类号： H02M7/487 ,  H02M1/32 ,  H02M2001/325 ,  H02M2007/53876 ,  Y10T307/839

摘要： A method for driving a neutral point clamped three-level inverter is provided. In one exemplary embodiment, DC current is received at a neutral point-clamped three-level inverter. The inverter has a plurality of nodes including first, second and third output nodes. The inverter also has a plurality of switches. Faults are checked for in the inverter and predetermined switches are automatically activated responsive to a detected fault such that three-phase electrical power is provided at the output nodes.

摘要翻译： 提供了一种用于驱动中性点钳位三电平逆变器的方法。 在一个示例性实施例中，在中性点钳位三电平逆变器处接收直流电流。 逆变器具有包括第一，第二和第三输出节点的多个节点。 逆变器还具有多个开关。 在变频器中检查故障，并且响应于检测到的故障自动激活预定开关，使得在输出节点处提供三相电力。

公开(公告)号：US6093866A

公开(公告)日：2000-07-25

申请号：US880741

申请日：1997-06-23

申请人： Qingxia Wang ,  Shurong Zhang ,  Guangyu Cai ,  Feng Li ,  Longya Xu ,  Zuxian Huang ,  Yuying Li

发明人： Qingxia Wang ,  Shurong Zhang ,  Guangyu Cai ,  Feng Li ,  Longya Xu ,  Zuxian Huang ,  Yuying Li

IPC分类号： B01J29/40 ,  C07B61/00 ,  C07C2/66 ,  C07C15/073 ,  C07C2/68

CPC分类号： B01J29/40 ,  C07C2/66 ,  B01J2229/26 ,  B01J2229/42 ,  C07C2529/40 ,  C07C2529/70 ,  Y02P20/52

摘要： An alkylation catalyst comprises from 50 to 70 wt % of hydrogen type ZSM-SM-11 co-crystaline zeolite containing rare earth element and the rest amount of porous inorganic oxide matrix material. The zeolite has particular chemical composition and X-ray diffraction lines. This catalyst has higher activity, selectivity and stability in alkylation process than that of the prior art. With this catalyst the process for preparing ethyl benzene by alkylation of benzene with ethylene has higher ethylene conversion and ethyl benzene selectivity.

摘要翻译： 烷基化催化剂含有50〜70重量％的氢型ZSM-5 / ZSM-11共结晶沸石含稀土元素和剩余量的多孔无机氧化物基体材料。 沸石具有特定的化学成分和X射线衍射线。 该催化剂在烷基化方法中比现有技术具有更高的活性，选择性和稳定性。 使用该催化剂，通过用乙烯烷基化苯制备乙苯的方法具有较高的乙烯转化率和乙苯选择性。

公开(公告)号：US07102321B2

公开(公告)日：2006-09-05

申请号：US10335804

申请日：2002-12-31

申请人： John Edwards ,  Longya Xu ,  Brij B. Bhargava

发明人： John Edwards ,  Longya Xu ,  Brij B. Bhargava

IPC分类号： H02P7/42 ,  H02M7/162

CPC分类号： H02M7/487

摘要： A method for driving a neutral point-clamped multi-level voltage source inverter supplying a synchronous motor is provided. A DC current is received at a neutral point-clamped multi-level voltage source inverter. The inverter has first, second, and third output nodes. The inverter also has a plurality of switches. A desired speed of a synchronous motor connected to the inverter by the first second and third nodes is received by the inverter. The synchronous motor has a rotor and the speed of the motor is defined by the rotational rate of the rotor. A position of the rotor is sensed, current flowing to the motor out of at least two of the first, second, and third output nodes is sensed, and predetermined switches are automatically activated by the inverter responsive to the sensed rotor position, the sensed current, and the desired speed.

摘要翻译： 提供一种用于驱动提供同步电动机的中性点钳位多电平电压源逆变器的方法。 在中性点钳位多电平电压源逆变器处接收直流电流。 逆变器具有第一，第二和第三输出节点。 逆变器还具有多个开关。 由逆变器接收由第一和第三节点连接到逆变器的同步电动机的期望速度。 同步电动机具有转子，电机的转速由转子的转速决定。 感测到转子的位置，感测到从第一，第二和第三输出节点中的至少两个流出到电动机的电流，并且响应于感测到的转子位置，感测到的电流，由转换器自动启动预定开关 ，和所需的速度。

公开(公告)号：US08030788B2

公开(公告)日：2011-10-04

申请号：US12347616

申请日：2008-12-31

申请人： Longya Xu ,  David Dimitri Karipides ,  Mohamed Abbas ,  Hao Huang

发明人： Longya Xu ,  David Dimitri Karipides ,  Mohamed Abbas ,  Hao Huang

IPC分类号： F02N11/04

CPC分类号： F02N15/00 ,  F01D15/10 ,  F02C7/268 ,  F02N11/04 ,  F02N11/0859 ,  F02N2011/0888 ,  F02N2011/0896 ,  F02N2250/08 ,  H02P21/24 ,  Y02T50/671

摘要： A method and system for an engine starter/generator is provided. The starter/generator system includes a three phase squirrel cage induction machine, a three phase inverter/converter electrically coupled to the three phase squirrel cage induction machine. The starter/generator system also includes a bidirectional DC-DC converter electrically coupled to the three phase inverter/converter, and a digital control board configured to sensorlessly determine a rotor angle from a plurality of phase currents to the induction machine during a start mode. During the start mode, logic in the digital control board configures the starter/generator system into a combination of an induction motor, a three phase DC-AC inverter, and a DC-DC boost converter, and during a generate mode, the logic in the digital control board configures the starter/generator system into a combination of an induction generator, a three phase AC-DC converter, and a DC-DC buck converter.

摘要翻译： 提供了一种用于发动机起动器/发电机的方法和系统。 起动器/发电机系统包括三相鼠笼式感应电机，三相逆变器/转换器，电耦合到三相鼠笼式感应电机。 起动/发电机系统还包括电耦合到三相逆变器/转换器的双向DC-DC转换器，以及配置成在启动模式期间无级地确定从多个相电流到感应电机的转子角度的数字控制板。 在启动模式期间，数字控制板中的逻辑将起动/发电机系统配置为感应电动机，三相DC-AC逆变器和DC-DC升压转换器的组合，在生成模式期间， 数字控制板将起动/发电机系统配置为感应发电机，三相AC-DC转换器和DC-DC降压转换器的组合。

公开(公告)号：US5869021A

公开(公告)日：1999-02-09

申请号：US575090

申请日：1995-12-19

申请人： Oingxia Wang ,  Shurong Zhang ,  Guangyu Cai ,  Feng Li ,  Longya Xu ,  Zuxian Huang ,  Yuying Li

发明人： Oingxia Wang ,  Shurong Zhang ,  Guangyu Cai ,  Feng Li ,  Longya Xu ,  Zuxian Huang ,  Yuying Li

IPC分类号： B01J29/48 ,  B01J29/40 ,  B01J29/70 ,  B01J29/80 ,  C01B39/36 ,  C07B37/00 ,  C07B37/02 ,  C07B61/00 ,  C01B39/38 ,  C01B39/46

CPC分类号： C01B39/365 ,  B01J29/80 ,  C01B39/36 ,  B01J29/40 ,  B01J29/70 ,  Y10S423/22 ,  Y10S423/29

摘要： A rare earth-containing zeolite with a cocrystalline structure of ZSM-5 and ZSM-11, wherein the weight ratio of the moiety having the crystalline structure of ZSM-5 to the moiety having the crystalline structure of ZSM-11 is 0.1 to 10, which has, in the sodium form, the X-ray diffraction pattern set forth in Table 1, and in its originally synthesized anhydrous state, a chemical formula in terms of mole ratios of oxides as follows: 0.1-1.0 Na.sub.2 O.0.01-1.0 RE.sub.2 O.sub.3.Al.sub.2 O.sub.3.20-300 SiO.sub.2. Said zeolite has good acid hydrothermal stability and resistance against impurity contamination, and is useful as catalyst in various hydrocarbon conversions.

摘要翻译： 具有ZSM-5和ZSM-11的共结晶结构的稀土类沸石，其中具有ZSM-5的结晶结构的部分与具有ZSM-11的结晶结构的部分的重量比为0.1〜10， 其以钠形式具有表1所示的X射线衍射图，并且在其原始合成的无水状态下，以氧化物摩尔比计的化学式如下：0.1-1.0 Na 2 O.0.01-1.0 RE 2 O 3 .Al2O3.20-300 SiO2。 所述沸石具有良好的酸性水热稳定性和抗杂质污染性，并且可用作各种烃转化中的催化剂。

公开(公告)号：US20100164428A1

公开(公告)日：2010-07-01

申请号：US12347616

申请日：2008-12-31

申请人： Longya Xu ,  David Dimitri Karipides ,  Mohamed Abbas ,  Hao Huang

发明人： Longya Xu ,  David Dimitri Karipides ,  Mohamed Abbas ,  Hao Huang

IPC分类号： H02P23/00 ,  H02P6/18 ,  H02K17/02 ,  H02P9/00

CPC分类号： F02N15/00 ,  F01D15/10 ,  F02C7/268 ,  F02N11/04 ,  F02N11/0859 ,  F02N2011/0888 ,  F02N2011/0896 ,  F02N2250/08 ,  H02P21/24 ,  Y02T50/671

摘要： A method and system for an engine starter/generator is provided. The starter/generator system includes a three phase squirrel cage induction machine, a three phase inverter/converter electrically coupled to the three phase squirrel cage induction machine. The starter/generator system also includes a bidirectional DC-DC converter electrically coupled to the three phase inverter/converter, and a digital control board configured to sensorlessly determine a rotor angle from a plurality of phase currents to the induction machine during a start mode. During the start mode, logic in the digital control board configures the starter/generator system into a combination of an induction motor, a three phase DC-AC inverter, and a DC-DC boost converter, and during a generate mode, the logic in the digital control board configures the starter/generator system into a combination of an induction generator, a three phase AC-DC converter, and a DC-DC buck converter.

摘要翻译： 提供了一种用于发动机起动器/发电机的方法和系统。 起动器/发电机系统包括三相鼠笼式感应电机，三相逆变器/转换器，电耦合到三相鼠笼式感应电机。 起动/发电机系统还包括电耦合到三相逆变器/转换器的双向DC-DC转换器，以及配置成在启动模式期间无级地确定从多个相电流到感应电机的转子角度的数字控制板。 在启动模式期间，数字控制板中的逻辑将起动/发电机系统配置为感应电动机，三相DC-AC逆变器和DC-DC升压转换器的组合，在生成模式期间， 数字控制板将起动/发电机系统配置为感应发电机，三相AC-DC转换器和DC-DC降压转换器的组合。

公开(公告)号：US5010267A

公开(公告)日：1991-04-23

申请号：US456032

申请日：1989-12-22

申请人： Thomas A. Lipo ,  Longya Xu

发明人： Thomas A. Lipo ,  Longya Xu

IPC分类号： H02K19/10 ,  H02K29/06

CPC分类号： H02K1/246 ,  H02K29/06

摘要： A high power density reluctance motor which is adapted to be supplied with unidirectional power from a converter has a multiphase stator with concentrated full pitch windings and multiple poles. The rotor has segments which constitute flux guides which serve to bend the flux produced by current flowing in a coil winding in a slot of the stator around the slot and back toward the periphery of the rotor, providing maximum inductance when a flux guide of the rotor is aligned with each such slot. Minimum inductance occurs when the flux guides are out of alignment with the slot conducting current and aligned with an adjacent slot, with a substantially linear change in inductance occuring with rotor displacment. The full pitch coils in each phase of the stator and the segmented rotor construction ensures that the entire air gap surface remains active, allowing greater torque to be produced than in a conventional switched reluctance motor and allowing the materials in the motor to work more efficiently under relatively mild electromagnetic stress. The motor can have few as two phases, with a two phase motor being drivable by a converter which has only two transistors switched to provide unidirectional current pulses to the two phases of the motor at the proper times to achieve motoring operation.

摘要翻译： 适用于从转换器提供单向功率的高功率密度磁阻电动机具有多相定子，其具有集中的全节距绕组和多极。 转子具有构成磁通引导件的段，其用于弯曲由在定子的槽中的线圈绕组中流过的电流产生的磁通，并且朝向转子的周边方向弯曲，当转子的磁通引导 与每个这样的槽对齐。 当磁通引导件与槽导电电流不对准并且与相邻的槽对齐时，产生最小电感，电感发生基本线性变化。 在定子和分段转子结构的每个相中的全音调线​​圈确保整个气隙表面保持有效，允许比传统的开关磁阻电机产生更大的转矩，并允许电动机中的材料更有效地工作 相对温和的电磁应力。 电动机可以具有很少的两相，其中两相电动机由转换器驱动，转换器只有两个晶体管被切换以在适当的时间向电动机的两相提供单向电流脉冲，以实现电动操作。