公开(公告)号：US08174377B2

公开(公告)日：2012-05-08

申请号：US12271551

申请日：2008-11-14

申请人： Chandra S. Namuduri ,  Yunjun Li ,  Timothy J. Talty ,  Robert B. Elliott ,  Nancy McMahon

发明人： Chandra S. Namuduri ,  Yunjun Li ,  Timothy J. Talty ,  Robert B. Elliott ,  Nancy McMahon

IPC分类号： B60Q1/00

CPC分类号： B60G17/018 ,  B60G2204/11 ,  B60G2204/1162 ,  B60G2400/252 ,  B60G2401/14 ,  B60G2401/174 ,  B60G2401/176 ,  B60G2401/21

摘要： A system is provided for determining a distance between a first portion of a vehicular suspension assembly and a second portion of the suspension assembly. The system comprises a transceiver coupled to the first portion for emitting a first signal toward the second portion, and for receiving a reflection of the first signal from the second portion, and a processor coupled to the transceiver for determining the distance between the first portion and the second portion.

摘要翻译： 提供了一种用于确定车辆悬架组件的第一部分和悬架组件的第二部分之间的距离的系统。 该系统包括耦合到第一部分的收发器，用于朝向第二部分发射第一信号，并且用于接收来自第二部分的第一信号的反射，以及耦合到收发器的处理器，用于确定第一部分和 第二部分。

公开(公告)号：US08022710B2

公开(公告)日：2011-09-20

申请号：US12016527

申请日：2008-01-18

申请人： William T. Ivan ,  Chandra S. Namuduri

发明人： William T. Ivan ,  Chandra S. Namuduri

IPC分类号： G01R31/08 ,  G01R31/00

CPC分类号： G01R19/16547

摘要： Methods for AC fault (ACF) detection are provided. In addition, methods for AC fault (ACF) detection and verification are provided. In addition, methods for identification of a module which is the cause of an AC fault (ACF) are provided. In one implementation, one or more of these methods can be combined to provide a fast, simple, low cost and reliable ACF detection, verification and/or identification.

摘要翻译： 提供交流故障（ACF）检测方法。 此外，还提供了交流故障（ACF）检测和验证的方法。 此外，还提供了用于识别作为AC故障（ACF）原因的模块的方法。 在一个实现中，这些方法中的一个或多个可以组合以提供快速，简单，低成本和可靠的ACF检测，验证和/或识别。

公开(公告)号：US20110187054A1

公开(公告)日：2011-08-04

申请号：US13083955

申请日：2011-04-11

申请人： Chandra S. Namuduri ,  Alan L. Browne ,  Nancy L. Johnson

发明人： Chandra S. Namuduri ,  Alan L. Browne ,  Nancy L. Johnson

IPC分类号： F16J15/16

CPC分类号： F16J15/164 ,  F16J15/3212

摘要： A dynamic shaft seal assembly for sealing a rotating or reciprocating shaft includes an elastic seal member having at least a portion thereof in sealing communication with the rotating or reciprocating shaft. A shape memory alloy element is in contact with the elastic seal member, the shape memory alloy element being discontinuously disposed about the elastic seal member, and being configured to i) directly apply a compressive force in a radial direction on the seal member against the rotating or reciprocating shaft, and ii) maintain the compressive force on the seal member as a function of temperature. The seal assembly is adapted to seal at a temperature ranging from about −55° C. to about 250° C. Methods including the seal assembly are also disclosed.

摘要翻译： 用于密封旋转或往复运动的轴的动态轴封组件包括弹性密封件，其具有与旋转或往复轴密封连通的至少一部分。 形状记忆合金元件与弹性密封构件接触，形状记忆合金元件围绕弹性密封构件不连续地设置，并且构造成：i）直接在密封构件上沿径向施加压缩力以抵抗旋转 或往复运动的轴，以及ii）保持作为温度的函数的密封件上的压缩力。 密封组件适于在约-55℃至约250℃的温度下密封。还公开了包括密封组件的方法。

公开(公告)号：US07973504B2

公开(公告)日：2011-07-05

申请号：US12179954

申请日：2008-07-25

申请人： Chandra S. Namuduri ,  Scott R. Kloess ,  Suresh Gopalakrishnan ,  Yat-Chung Tang

发明人： Chandra S. Namuduri ,  Scott R. Kloess ,  Suresh Gopalakrishnan ,  Yat-Chung Tang

IPC分类号： H02P7/00

CPC分类号： B62D5/049 ,  B62D5/0484

摘要： A method for improving a failure mode diagnostic of an electric power steering system by overcoming a motor electric lock condition due to position sensor signal corruption or other motor faults. If certain conditions are met, the method determines that the motor is in an electric lock condition, and then reduces a torque current command to the motor so that it is able to be rotated by a vehicle hand-wheel. Once the motor is able to be rotated, then the method determines whether certain conditions have been met to determine whether the position sensor is malfunctioning.

摘要翻译： 一种用于通过克服由于位置传感器信号损坏或其他电动机故障引起的电动机电锁状态来改善电动助力转向系统的故障模式诊断的方法。 如果满足某些条件，则该方法确定电动机处于电锁状态，然后减小对电动机的转矩电流指令，使其能够通过车辆手轮旋转。 一旦电机能够旋转，则该方法确定是否满足某些条件以确定位置传感器是否发生故障。

公开(公告)号：US20100244610A1

公开(公告)日：2010-09-30

申请号：US12409672

申请日：2009-03-24

申请人： Lei Hao ,  Chandra S. Namuduri ,  Balarama V. Murty

发明人： Lei Hao ,  Chandra S. Namuduri ,  Balarama V. Murty

IPC分类号： H02K1/00 ,  H02K3/00

CPC分类号： H02K21/12 ,  H02K1/27 ,  H02K1/278 ,  H02K1/30 ,  H02K7/08 ,  H02K7/083 ,  H02K7/088 ,  H02K21/16 ,  H02K29/03

摘要： A single stator electric machine includes a plurality of magnets for generating a first magnetic field. Each respective magnet represents a respective rotor pole. A magnet holder retains the plurality of magnets. A stator is disposed radially outward from the plurality of magnets for generating a second magnetic field. The stator includes a plurality of stator poles separated by slots with each of the stator poles having a concentrated winding with a respective number of turns formed around each respective stator pole. Each respective concentrated winding within the stator comprises non-overlapping phases which increase an active length of the windings of the stator and reduce an overhang of each respective winding with respect to each stator pole for improving torque efficiency. A number of rotor poles is at least eight and the number of rotor poles and a number of stator slots have a least common multiple of at least 36.

摘要翻译： 单个定子电机包括用于产生第一磁场的多个磁体。 各个磁体表示相应的转子极。 磁体保持器保持多个磁体。 定子从多个磁体径向向外设置，用于产生第二磁场。 定子包括由槽分开的多个定子极，每个定子极具有集中的绕组，每个相应的定子极周围形成相应的匝数。 定子内的每个各自的集中绕组包括非重叠相，其增加定子的绕组的有效长度并且相对于每个定子极减小每个相应绕组的悬伸以提高转矩效率。 多个转子极点至少为8个，转子极数和多个定子槽具有至少36的最小公倍数。

公开(公告)号：US07797096B2

公开(公告)日：2010-09-14

申请号：US11468830

申请日：2006-08-31

申请人： Michael G. Reynolds ,  Chandra S. Namuduri ,  Toufic M Hijazi ,  Scott J. Chynoweth ,  Michael Livshiz

发明人： Michael G. Reynolds ,  Chandra S. Namuduri ,  Toufic M Hijazi ,  Scott J. Chynoweth ,  Michael Livshiz

IPC分类号： F02N11/06 ,  H02P9/04

CPC分类号： H02P23/14 ,  H02P9/04

摘要： An engine control system for an engine that drives a generator includes a temperature sensor that generates a temperature signal and a control module that determines a generator torque based on an engine speed and a generator characteristic. The control module determines a torque correction factor based on the temperature signal and determines a corrected generator torque based on the generator torque and the torque correction factor. Various embodiments of the invention utilize engine speed, system voltages field winding duty cycle engine temperature, ambient temperature and/or generator current.

摘要翻译： 用于驱动发电机的发动机的发动机控制系统包括产生温度信号的温度传感器和基于发动机转速和发电机特性确定发电机转矩的控制模块。 控制模块基于温度信号确定转矩校正因子，并且基于发电机转矩和转矩校正因子确定校正的发电机转矩。 本发明的各种实施例利用发动机转速，系统电压场绕组占空比发动机温度，环境温度和/或发电机电流。

公开(公告)号：US07786687B2

公开(公告)日：2010-08-31

申请号：US12109676

申请日：2008-04-25

申请人： Chandra S. Namuduri ,  Suresh Gopalakrishnan ,  Robert R. Bolio ,  Ross Feller ,  Balarama V. Murty

发明人： Chandra S. Namuduri ,  Suresh Gopalakrishnan ,  Robert R. Bolio ,  Ross Feller ,  Balarama V. Murty

IPC分类号： H02P1/04 ,  H02P6/04

CPC分类号： B62D5/046

摘要： A motor control strategy for a motor in a front steering system for a vehicle that reduces vibrations from the motor being transferred to a vehicle hand-wheel. The control strategy also includes operating the electric motor in a commutation freeze mode if a position error signal is less than a first predetermined threshold by sending signals to coils of the motor to prevent to the motor from rotating, operating the electric motor in a commutation normal mode if the position error signal is greater than a second predetermined threshold that is greater than the first predetermined threshold, and operating the electric motor in an angle step mode if the position error signal is between an intermediate threshold and the second threshold where the angle step mode provides a signal to the motor to move the motor forward or backward a predetermined number of motor steps, one step at a time.

摘要翻译： 一种用于车辆的前转向系统中的电动机的电动机控制策略，其减少被传递到车辆手轮的电动机的振动。 控制策略还包括如果位置误差信号小于第一预定阈值，则通过向马达的线圈发送信号以防止马达旋转，以换向正常方式操作电动机，以换相冻结模式操作电动机 模式，如果位置误差信号大于大于第一预定阈值的第二预定阈值，并且如果位置误差信号在中间阈值和第二阈值之间，角度步长模式下操作电动机，其中角度步 模式向马达提供信号以使电机向前或向后移动预定数量的马达步骤，一次一步。

公开(公告)号：US20080284385A1

公开(公告)日：2008-11-20

申请号：US12114008

申请日：2008-05-02

申请人： Chandra S. Namuduri ,  Lei Hao

发明人： Chandra S. Namuduri ,  Lei Hao

IPC分类号： H02P9/00 ,  H02M7/06 ,  H02M7/217

CPC分类号： H02M7/219 ,  H02P9/30

摘要： A generator system that includes a three-phase AC machine and an active rectifier bridge employing low on-resistance MOSFET switches for converting the AC current from the machine to a DC current. The system also includes a switch control circuit to switch the MOSFET switches in synchronization with the three-phase current flow. The system determines the phase-to-ground voltages of the machine as inputs to the switch control circuit. The control circuit calculates the phase-to-phase voltages from the phase-to-ground voltages. The control circuit then determines if each of the phase-to-phase voltages is above or below first and second predetermined threshold voltages, where if the phase-to-phase voltage is above the first threshold voltage, the control circuit closes the switch, and if the phase-to-phase voltage is below the second threshold voltage, the control circuit opens the switch.

摘要翻译： 一种发电机系统，包括三相交流电机和采用低导通电阻MOSFET开关的有源整流桥，用于将来自机器的交流电流转换为直流电流。 该系统还包括开关控制电路，以与三相电流流同步地切换MOSFET开关。 该系统确定机器的相对地电压作为开关控制电路的输入。 控制电路根据相对地电压来计算相间电压。 然后，控制电路确定每个相间电压是否高于或低于第一和第二预定阈值电压，其中如果相间电压高于第一阈值电压，则控制电路关闭开关，并且 如果相间电压低于第二阈值电压，则控制电路打开开关。

公开(公告)号：US20080272259A1

公开(公告)日：2008-11-06

申请号：US11744417

申请日：2007-05-04

申请人： Pablo D. Zavattieri ,  Mark A. Kramarczyk ,  Alan L. Browne ,  James Y. Khoury ,  Nancy L. Johnson ,  Chandra S. Namuduri ,  Senthil N. Karuppaswamy ,  Nilesh D. Mankame ,  Rainer A. Glaser ,  Paul W. Alexander

发明人： Pablo D. Zavattieri ,  Mark A. Kramarczyk ,  Alan L. Browne ,  James Y. Khoury ,  Nancy L. Johnson ,  Chandra S. Namuduri ,  Senthil N. Karuppaswamy ,  Nilesh D. Mankame ,  Rainer A. Glaser ,  Paul W. Alexander

IPC分类号： A47K1/08

CPC分类号： B60R7/02 ,  B60N3/105 ,  B60N3/108 ,  B60N3/12

摘要： In an embodiment, a device comprises an active material. Activation of the active material causes deformation within the device to conform to and/or retain an object without engaging the object below a surface of the object. In another embodiment, contact with an object causes deformation within the device to conform to and/or retain the object. In yet another embodiment, an object holder can comprise: a recess, a cover disposed over the recess, and a switch configured to cause the active material to retain a deformed shape in the recess. The cover comprises an active material. The active material is configured to deform into the recess when contacted with an object.

摘要翻译： 在一个实施例中，装置包括活性材料。 活性材料的活化导致装置内的变形以使物体符合和/或保持物体，而不将物体接合在物体表面下方。 在另一个实施例中，与对象的接触导致设备内的变形以符合和/或保持对象。 在另一个实施例中，物体保持器可以包括：凹部，设置在凹部上方的盖，以及被配置成使活性材料在凹部中保持变形形状的开关。 盖子包括活性材料。 活性材料构造成当与物体接触时变形成凹陷。

公开(公告)号：US07401834B2

公开(公告)日：2008-07-22

申请号：US11180801

申请日：2005-07-13

申请人： Alan L. Browne ,  Chandra S. Namuduri

发明人： Alan L. Browne ,  Chandra S. Namuduri

IPC分类号： B60J7/00

CPC分类号： B60N2/2806 ,  B60N2/2887

摘要： A child seat anchor assembly includes a fixed portion, wherein the fixed portion is secured to a motor vehicle structural member or a child seat structural member; a latchable portion for releasable engagement with a child seat or a motor vehicle; an energy absorbing mechanism disposed between and in operative communication with the fixed portion and the latchable portion, wherein the energy absorbing mechanism comprises an active material; and a controller in operative communication with the active material, wherein the controller is operable to selectively apply an activation signal to the active material and effect a change in an attribute of the active material, wherein the change in the attribute results in force and acceleration adjusting energy absorption.

摘要翻译： 儿童座椅锚固组件包括固定部分，其中固定部分固定到机动车结构构件或儿童座椅结构构件; 用于与儿童座椅或机动车辆可释放地接合的可闩锁部分; 能量吸收机构，其设置在所述固定部分和所述可闩锁部分之间并且与所述可闩锁部分操作连通，其中所述能量吸收机构包括活性材料; 以及控制器，其与所述活性材料可操作地通信，其中所述控制器可操作以选择性地向所述活性材料施加激活信号并且影响所述活性材料的属性的变化，其中所述属性的变化导致强制和加速度调节 能量吸收。