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    • 93. 发明申请
    • Locomotive Wheel Speed Control
    • 机车转速控制
    • US20080042602A1
    • 2008-02-21
    • US11465208
    • 2006-08-17
    • Ajith Kuttannair Kumar
    • Ajith Kuttannair Kumar
    • H02P5/00
    • B60L15/20B60L2200/26Y02T10/645Y02T10/72Y02T10/7275
    • A method for controlling a wheel speed of a locomotive includes determining an estimated wheel speed (52) for a desired wheel set of a locomotive responsive to a locomotive operating parameter indicative of an actual wheel speed of the desired wheel set. The method also includes generating a first adjustment parameter (e.g., 46) based on an operating condition of the locomotive, and then applying the first adjustment parameter to the estimated wheel speed for generating a first adjusted estimated wheel speed signal (54) used as a first input for controlling a wheel speed of at least one of the desired wheel set and the other wheel sets of the locomotive.
    • 一种用于控制机车的车轮速度的方法包括响应于指示期望的车轮组的实际车轮速度的机车操作参数来确定机车的期望车轮组的估计车轮速度(52)。 该方法还包括基于机车的操作条件产生第一调整参数(例如46),然后将第一调整参数应用于估计的车轮速度,以产生用作第一调整估计车轮速度信号(54) 用于控制机车的所需轮组和其它车轮组中的至少一个的车轮速度的第一输入。
    • 95. 发明授权
    • Method, apparatus and computer-readable code for magnifying an incipient ground fault and enable quick detection of such fault
    • 用于放大初始接地故障的方法,设备和计算机可读代码,并能够快速检测此类故障
    • US07102355B1
    • 2006-09-05
    • US11385310
    • 2006-03-21
    • Ajith Kuttannair Kumar
    • Ajith Kuttannair Kumar
    • G01R31/14H02H9/08
    • G01R31/025
    • Method, apparatus and computer-readable code are provided for detecting a location of an incipient ground fault in an electrical propulsion system of a relatively large land-based vehicle, such as a locomotive. A method embodying aspects of the present invention allows to simultaneously apply a forcing function to one or more electrical devices connected to a direct current (dc) bus. The forcing function is configured to magnify (without voltage stress to such devices) an incipient ground fault that may be directly associated with a given electrical device. This enables to quickly identify the incipient ground fault and to uniquely identify the electrical device likely to be experiencing the incipient ground fault.
    • 提供了一种方法,装置和计算机可读代码,用于检测诸如机车的相对较大的陆基车辆的电推进系统中初始接地故障的位置。 体现本发明的方面的方法允许同时对连接到直流(dc)总线的一个或多个电气设备施加强制功能。 强制功能被配置为放大(对这种设备没有电压应力)可能与给定电气设备直接相关联的初始接地故障。 这使得能够快速识别初始接地故障并且唯一地识别可能经历初始接地故障的电气设备。
    • 97. 发明授权
    • Railway train friction management and control system and method
    • 铁路列车摩擦管理与控制系统及方法
    • US06893058B2
    • 2005-05-17
    • US10606722
    • 2003-06-26
    • Ajith Kuttannair KumarVishwesh M. PalekarAnthony GiammariseChi-Houng E. LuJohn Polley
    • Ajith Kuttannair KumarVishwesh M. PalekarAnthony GiammariseChi-Houng E. LuJohn Polley
    • B61C15/10B60B39/00
    • B61C15/10
    • A system and method for friction management for managing and controlling an application of a friction modifying agent to an area of contact between a railway wheel and a railway rail over which the wheel is traversing to selectively modify the coefficient of friction at the contact area. The system comprises a sensor for detecting a parameter relating to the operation of the railway train. A controller is responsive to the sensor and controls the application of a friction modifying agent to the rail as a function of the parameter. An applicator is responsive to the controller and applies the friction modifying agent to the area of contact between the railway wheel and rail. The invention also includes a method for railway train friction management for managing and controlling the application of friction modifying agent to an area of contact between railway wheel and railway rail over which the wheel is traversing to selectively modify the coefficient of friction at the contact area. The method comprises sensing a parameter related to the operation of the railway train and applying the friction modifying agent to the area of contact between the railway wheel and rail as a function of the sensed parameter.
    • 一种用于摩擦管理的系统和方法,用于管理和控制将摩擦改进剂施加到车轮横向移动的铁路车轮与铁路轨道之间的接触区域,以选择性地改变接触区域处的摩擦系数。 该系统包括用于检测与铁路列车的操作相关的参数的传感器。 作为参数的函数,控制器响应于传感器并且控制将摩擦改进剂施加到轨道上。 施加器响应于控制器并将摩擦改进剂施加到铁路车轮和轨道之间的接触区域。 本发明还包括一种用于铁路列车摩擦管理的方法,用于管理和控制摩擦改进剂在车轮横向移动的铁路车轮与铁路轨道之间的接触区域的应用,以选择性地改变接触区域的摩擦系数。 该方法包括感测与铁路车辆的操作有关的参数,并根据感测参数将摩擦改进剂施加到铁路车轮和轨道之间的接触区域。
    • 100. 发明授权
    • Thermal protection of traction inverters
    • 牵引逆变器热保护
    • US5712802A
    • 1998-01-27
    • US633390
    • 1996-04-16
    • Ajith Kuttannair KumarPeter Billey Macchiaroli
    • Ajith Kuttannair KumarPeter Billey Macchiaroli
    • G05D23/19H05K7/20H01L23/34
    • H05K7/20918G05D23/1917H05K7/20945H01L2924/0002
    • A method for providing thermal protection for forced air cooled power electronic semiconductors without direct measurement of semiconductor temperature, the semiconductors being mounted on a heat sink over which cooling air is blown includes the steps of computing the cooling air mass flow rate, creating an electronic model of the semiconductor/heat sink combination and estimating the semiconductor junction temperature from the mass flow rate and model. The cooling mass flow rate is determined by measuring the temperature of the cooling air prior to passage over the heat sink, measuring atmospheric pressure of the cooling air, determining the volumetric air flow rate of the cooling air and computing, from the cooling air temperature, pressure and volumetric flow rate, the cooling air mass flow rate. Power dissipation in the semiconductors is then computed and heat sink and semiconductor temperatures are estimated from power dissipation and cooling air mass flow rate. Semiconductor power dissipation is limited so as to restrict semiconductor temperature to a safe operating value.
    • 一种无需直接测量半导体温度的强制风冷功率电子半导体的热保护方法,安装在冷却空气吹过的散热片上的半导体包括计算冷却空气质量流量,形成电子模型的步骤 的半导体/散热器组合,并从质量流量和模型估计半导体结温度。 冷却质量流量通过在冷却空气通过之前测量冷却空气的温度来测定,测量冷却空气的大气压力,确定冷却空气的体积空气流速并从冷却空气温度计算, 压力和体积流量,冷却空气质量流量。 然后计算半导体中的功率消耗,并根据功率耗散和冷却空气质量流量来估计散热器和半导体温度。 半导体功耗受到限制,从而将半导体温度限制在安全的工作值。