公开(公告)号：US07350405B2

公开(公告)日：2008-04-01

申请号：US11398424

申请日：2006-04-05

申请人： Ahmed Esa Sheikh ,  Bo Nilson Almstedt ,  Larry G. Anderson ,  Kirk Heywood ,  Ajith K. Kumar

发明人： Ahmed Esa Sheikh ,  Bo Nilson Almstedt ,  Larry G. Anderson ,  Kirk Heywood ,  Ajith K. Kumar

IPC分类号： G01M15/00

CPC分类号： G01M15/06

摘要： Disclosed herein are methods of generating a virtual crankshaft positioning stream of signal pulses that is derived from one or more series of actual crank signals. The virtual stream is useful for monitoring crankshaft positioning and is able to persist despite electromagnetic disturbances in the series of actual crank signals.

摘要翻译： 这里公开的是产生从一个或多个实际曲柄信号系列导出的信号脉冲的虚拟曲轴定位流的方法。 虚拟流对于监视曲轴定位是有用的，并且能够持续，尽管一系列实际曲柄信号中存在电磁干扰。

公开(公告)号：US20080074070A1

公开(公告)日：2008-03-27

申请号：US11534772

申请日：2006-09-25

申请人： Ajith K. Kumar ,  Kevin Jones

发明人： Ajith K. Kumar ,  Kevin Jones

IPC分类号： G05B13/00

CPC分类号： B60L11/00 ,  B60L9/00 ,  B60L2200/26 ,  H02P23/14

摘要： A method for autonomously identifying a type of motor based on a characteristic value of the motor, the method including measuring a characteristic value of a motor, comparing the measured characteristic value to a known characteristic value, and identifying the motor based on the measured characteristic value when compared to the known characteristic value.

摘要翻译： 一种用于基于电动机的特性值自动识别电动机的方法，所述方法包括测量电动机的特性值，将所测量的特征值与已知特征值进行比较，并且基于所测量的特性值来识别电动机 当与已知的特征值相比时。

公开(公告)号：US06208097B1

公开(公告)日：2001-03-27

申请号：US09455431

申请日：1999-12-06

申请人： Suresh Baddam Reddy ,  Jeffrey Louis Diagle ,  Bret Dwayne Worden ,  Harry Kirk Mathews, Jr. ,  Edgar Thomas Balch ,  Allan John Connolly ,  Ajith K. Kumar

发明人： Suresh Baddam Reddy ,  Jeffrey Louis Diagle ,  Bret Dwayne Worden ,  Harry Kirk Mathews, Jr. ,  Edgar Thomas Balch ,  Allan John Connolly ,  Ajith K. Kumar

IPC分类号： H02P1508

CPC分类号： B60L3/10 ,  B60L2200/26 ,  B60L2210/20 ,  Y02T10/725

摘要： An adhesion control system for a locomotive is provided for achieving and maintaining a maximum adhesion value. The adhesion control system includes a means for determining from an appropriate adhesion-creep curve an ideal creep rate that must be achieved and maintained in order to achieve and maintain a maximum adhesion value, a means for estimating an actual creep rate through the measurement or estimation of motor or wheel acceleration and locomotive acceleration, a means for selecting a creep rate set point based on a comparison of the actual creep rate and the ideal creep rate where the creep rate set point is set to a positive value if the actual creep rate is less than the ideal creep rate minus an acceptable differential and is set to a negative value if the actual creep rate is greater than the ideal creep rate plus the acceptable differential, and a means responsive to the creep rate set point for adjusting the operation of the locomotive so that the maximum adhesion value may be realized where the actual creep rate is increased if the creep rate set point is set to the positive value and is decreased if the creep rate set point is set to the negative value.

摘要翻译： 提供了一种用于机车的粘附控制系统，用于实现和保持最大的附着值。 附着控制系统包括用于从适当的粘附蠕变曲线确定理想的蠕变速率的装置，该理想的蠕变速率必须被实现和维持以便实现和维持最大的附着值，用于通过测量或估计来估计实际蠕变速率的装置 电动机或车轮加速度和机车加速度的方法，用于根据实际蠕变速率和理想蠕变速率的比较来选择蠕变速率设定点的装置，其中如果实际蠕变速率为蠕变速率设定点，蠕变速率设定点设定为正值 小于理想蠕变速率减去可接受的差值，并且如果实际蠕变速率大于理想蠕变速率加上可接受的差值，则设定为负值，以及响应于蠕变速率设定点来调整操作的装置 机车，使得如果蠕变速率设定点被设定为正值，则可以实现实际蠕变速率增加的最大附着值 如果蠕变速率设定点设定为负值，则减小。

公开(公告)号：US6163121A

公开(公告)日：2000-12-19

申请号：US405633

申请日：1999-09-24

申请人： Ajith K. Kumar ,  Edgar T. Balch

发明人： Ajith K. Kumar ,  Edgar T. Balch

IPC分类号： B61C15/08 ,  H02P7/00

CPC分类号： B61C15/08

摘要： A method and traction control system for an AC locomotive which separately controls the allowable creep level of each individual axle and optimizes traction performance by minimizing torsional vibration per axle. The traction control system includes a torque maximizer and a torsional vibration detector. The torque maximizer evaluates the change in traction system performance levels and actual creep level of individual axles and determines the desired torque maximizer state for maximizing traction performance of each individual axle. The torque maximizer utilizes digital filtering to minimize control cycle time. The torsional vibration detector digitally processes estimated torque feedback of each traction motor in order to detect an unacceptable level of torsional vibration. The outputs of the torque maximizer and the torsional vibration detector are provided to a creep modulator which processes these inputs in order to control the operating creep level of each locomotive axle. As a result, traction performance is improved while minimizing torsional vibration and operating noise levels due to wheel/rail squeal.

摘要翻译： 一种用于交流机车的方法和牵引力控制系统，其分别控制每个单独轴的允许的蠕变水平，并通过最小化每个轴的扭转振动来优化牵引性能。 牵引力控制系统包括转矩最大化器和扭转振动检测器。 扭矩最大化器评估牵引系统性能水平和单个轴的实际蠕变水平的变化，并确定期望的扭矩最大化器状态，​​以最大化每个单独轴的牵引性能。 扭矩最大化器利用数字滤波来最小化控制周期时间。 扭转振动检测器数字地处理每个牵引电动机的估计转矩反馈，以便检测不可接受的扭转振动水平。 扭矩最大化器和扭转振动检测器的输出被提供给蠕变调制器，其处理这些输入以便控制每个机车轴的操作蠕变水平。 结果，提高牵引性能，同时最小化由于轮/轨道尖叫引起的扭转振动和操作噪音水平。

公开(公告)号：US5528486A

公开(公告)日：1996-06-18

申请号：US399247

申请日：1995-03-06

申请人： Ajith K. Kumar ,  Thomas D. Stitt

发明人： Ajith K. Kumar ,  Thomas D. Stitt

IPC分类号： H02M7/5387 ,  H02M7/44

CPC分类号： H02M7/53873

摘要： A method and apparatus for generating gating signals for each of a plurality of electric switching devices in electric power conversion circuit includes a microcomputer for computing timing data representative of a relative time for application of gating signals to each of the switching devices for generating a desired electric power output from the conversion circuit. The timing data is provided to a volatile memory which has a plurality of addressable memory locations in which each memory location address corresponds to a selected time increment. Timing signals are generated in an address format for the memory such that each of the timing signals addresses a unique memory location in the memory. The gating signals for the switching devices are stored in memory locations in the memory corresponding to the time with respect to a starting point at which it is desired to have the gating signals generated. As the timer-counter generates sequential timing signals, sequential locations in the memory are addressed and, if a gating signal is present in that location, a gating signal is output to the conversion circuit.

摘要翻译： 一种用于为电力转换电路中的多个电开关装置中的每一个生成门控信号的方法和装置，包括微计算机，用于计算表示用于向每个开关装置施加门控信号的相对时间的定时数据，用于产生期望的电 转换电路输出功率。 定时数据被提供给具有多个可寻址存储器位置的易失性存储器，其中每个存储器位置地址对应于所选择的时间增量。 定时信号以存储器的地址格式生成，使得每个定时信号寻址存储器中唯一的存储器位置。 用于开关装置的门控信号被存储在存储器中的存储器位置中，该存储器位于对应于期望具有产生门控信号的起始点的时间。 当定时器计数器产生顺序定时信号时，存储器中的顺序位置被寻址，并且如果该位置中存在门控信号，则门控信号被输出到转换电路。

公开(公告)号：US5396214A

公开(公告)日：1995-03-07

申请号：US140805

申请日：1993-10-21

申请人： Ajith K. Kumar

发明人： Ajith K. Kumar

IPC分类号： H01C3/02 ,  B60L3/00 ,  B60L7/06 ,  B60L9/00 ,  H01C3/00

CPC分类号： B60L3/00 ,  B60L9/005 ,  B60L2200/26

摘要： A dynamic braking grid arrangement for reducing EMI generated by dynamic or partial regenerative electrical braking of an electric traction motor powered vehicle coupled to a wayside power source by a third rail or catenary. The grid arrangement comprises a high-power dissipation resistance grid having a plurality of separately defined resistance elements, each having a generally elongate configuration. Mounting means support each of the grid elements adjacent to and parallel with each other of the elements. A plurality of electrical conduction devices connect the elements into an electrical circuit such that current passes through at least one element in a first direction and through at least one adjacent element in a second opposite direction such that EMI generated by any one element is substantially cancelled by EMI generated by an adjacent element.

摘要翻译： 一种动态制动电网装置，用于减少通过第三轨道或悬链线联接到路旁电源的电牵引电动机动力车辆的动态或部分再生电制动所产生的EMI。 栅格布置包括具有多个单独限定的电阻元件的高功率耗散电阻栅格，每个具有大致细长的构造。 安装装置支撑与元件相邻并且彼此平行的每个栅格元件。 多个导电装置将元件连接到电路中，使得电流在第一方向上通过至少一个元件并且沿第二相反方向穿过至少一个相邻元件，使得由任何一个元件产生的EMI基本上被 由相邻元件产生的EMI。

公开(公告)号：US5323095A

公开(公告)日：1994-06-21

申请号：US693743

申请日：1991-04-30

申请人： Ajith K. Kumar

发明人： Ajith K. Kumar

IPC分类号： B60L7/04 ,  B60L7/22 ,  H02P3/14

CPC分类号： B60L7/04 ,  B60L7/22 ,  Y10S388/917

摘要： A system and method for controlling power transfer between an internal combustion driven electrical power generator and a direct current (DC) motor. In one form, the invention includes control of a power inverter in a manner to restrict current through a winding of the generator to a predetermined polarity. The inverter includes a plurality of gate controlled switching devices which are selectively energized to allow current to free wheel through the motor during at least some portion of each alternating voltage cycle of the generator. In another form, a plurality of resistors are connected in series with an inverter and a DC motor with each resistor including a switching device for bypassing current around the associated resistor. In this form, resistors can be selectively inserted into the series path during electrical braking so that a maximum amount of electrical energy can be transferred to the generator through the inverter without exceeding the voltage limits of the inverter during high speed braking. Regenerative braking is further maximized during low speed or reduced braking requirements by removing resistors from the series current path.

摘要翻译： 一种用于控制内燃动力发电机与直流（DC）电动机之间的动力传递的系统和方法。 在一种形式中，本发明包括以限制电流通过发电机的绕组至预定极性的方式控制电力逆变器。 逆变器包括多个门控开关装置，其被选择性地通电以允许电流在发电机的每个交流电压循环的至少一部分期间通过电动机释放轮。 在另一种形式中，多个电阻器与逆变器和DC电动机串联连接，每个电阻器包括用于旁路相关电阻器周围的电流的开关装置。 在这种形式中，电气制动期间可以选择性地将电阻器插入到串联路径中，使得最大量的电能可以在高速制动期间不超过逆变器的电压限制通过逆变器传递给发电机。 通过从串联电流路径去除电阻器，在低速或减少的制动要求下，再生制动进一步最大化。

公开(公告)号：US5245294A

公开(公告)日：1993-09-14

申请号：US666832

申请日：1991-03-08

申请人： Ajith K. Kumar

发明人： Ajith K. Kumar

IPC分类号： B60L3/00 ,  B60L7/14

CPC分类号： B60L7/003 ,  B60L3/00 ,  B60L7/14

摘要： A method for measuring capacitance in a power conversion system by measuring the time rate of discharge of the capacitance means and computing the value of capacitance corresponding to the measured discharge rate and a method for verifying that a filter in the power conversion system is effective for suppressing preselected frequencies corresponding to signalling frequencies used in a transit system. In this latter form, the system periodically initiates a self-test function in which the preselected frequency is injected into the system for verifying that the system will detect signals at the preselected frequency.

摘要翻译： 一种用于通过测量电容装置的放电时间速率并计算对应于测量的放电率的电容值来测量功率转换系统中的电容的方法以及用于验证电力转换系统中的滤波器对抑制 对应于在运输系统中使用的信号频率的预选频率。 在后一种形式中，系统周期性地启动自检功能，其中将预选频率注入系统以验证系统将以预选频率检测信号。

公开(公告)号：US4695941A

公开(公告)日：1987-09-22

申请号：US760204

申请日：1985-07-29

申请人： Ajith K. Kumar

发明人： Ajith K. Kumar

IPC分类号： B60L3/12 ,  B60L50/12 ,  H02P23/00 ,  G05B13/02

CPC分类号： B60L11/06 ,  B60L3/12 ,  H02P23/16 ,  B60L2200/26 ,  Y02T10/642 ,  Y02T10/70 ,  Y02T10/7077 ,  Y02T10/7258

摘要： To detect any abnormal loss of a feedback signal in an electric power system wherein a plurality of feedback signals are respectively derived from various system quantities, such as voltage and current, and are used as inputs to a controller that regulates the output of a controllable source of power, the controller is arranged to estimate the desired value of the system quantity from which a first feedback signal is derived, to compare the estimated desired value with the actual value of the same quantity (as indicated by the first feedback signal), and to signal a malfunction if this comparison reveals that the first feedback signal is faulty.

摘要翻译： 为了检测电力系统中反馈信号的任何异常损失，其中多个反馈信号分别从诸如电压和电流的各种系统数量导出，并被用作控制器的输入，该控制器调节可控源的输出 控制器被布置为估计从其导出第一反馈信号的系统数量的期望值，以将估计的期望值与相同数量的实际值（如由第一反馈信号所指示的）进行比较，以及 如果该比较显示第一反馈信号有故障，则发出故障信号。

公开(公告)号：US07746604B2

公开(公告)日：2010-06-29

申请号：US11533397

申请日：2006-09-20

申请人： Christopher Wade McNally ,  Ajith K. Kumar ,  Bret Dwayne Worden ,  Theodore Clark Brown

发明人： Christopher Wade McNally ,  Ajith K. Kumar ,  Bret Dwayne Worden ,  Theodore Clark Brown

IPC分类号： H02H3/00 ,  H02H5/04 ,  H02H7/08

CPC分类号： B60L3/0023 ,  B60L3/0069 ,  B60L2200/26 ,  B60L2210/20 ,  Y02T10/725

摘要： In an off-road vehicle having a resistor grid network and a blower system as part of a braking system operable to determine at least one of a resistor failure and a blower failure, the system including a first series of resistors connected in series, a second series of resistors connected in series, a blower cross to at least one of the first series of resistors and the second series of resistors, a sensor proximate at least one of the first series of resistors, the second series of resistors, and the blower, wherein each individual resistor in the first series connected in parallel to an individual resistor in the second series, and wherein when at least one of a current value, blower speed, and voltage value changes, the grid network is disconnected.

摘要翻译： 在具有电阻网格网络和作为制动系统的一部分的鼓风机系统的越野车辆中，可操作以确定电阻器故障和鼓风机故障中的至少一个，所述系统包括串联连接的第一串联电阻器，第二组 一系列串联的电阻器，鼓风机与第一系列电阻器和第二系列电阻器中的至少一个交叉，靠近第一系列电阻器，第二系列电阻器和鼓风机中的至少一个的传感器， 其中所述第一串联中的每个单独电阻器并联连接到所述第二系列中的单独电阻器，并且其中当电流值，鼓风机速度和电压值中的至少一个改变时，所述电网网络被断开。