公开(公告)号：US20070001629A1

公开(公告)日：2007-01-04

申请号：US11173299

申请日：2005-06-30

申请人： Jeremy McGarry ,  Somakumar Ramachandra-Panicker ,  Ajith Kumar ,  Venkatarao Ryali ,  Bret Worden ,  Jeffrey Daigle ,  Paul Houpt

发明人： Jeremy McGarry ,  Somakumar Ramachandra-Panicker ,  Ajith Kumar ,  Venkatarao Ryali ,  Bret Worden ,  Jeffrey Daigle ,  Paul Houpt

IPC分类号： H02P7/74

CPC分类号： B60T8/1705 ,  B60L3/10 ,  B60L3/102 ,  B60L2200/26 ,  B60T8/172 ,  B60T2210/12 ,  B61C15/14 ,  Y02T10/646

摘要： A traction control system for controlling an electric traction motor drivingly coupled to a wheel of a tractive vehicle. The traction control system includes means for determining speed of the wheel, means for determining tractive effort of the wheel and a control circuitry for controlling drive signals to the motor based upon the wheel speed and tractive effort.

公开(公告)号：US20060255656A1

公开(公告)日：2006-11-16

申请号：US11126801

申请日：2005-05-11

申请人： Mark Linebach ,  Ajith Kumar ,  Bret Worden ,  Jeremy McGarry ,  Scott Zarella

发明人： Mark Linebach ,  Ajith Kumar ,  Bret Worden ,  Jeremy McGarry ,  Scott Zarella

IPC分类号： B60T8/34

CPC分类号： B60L9/005 ,  B60L2200/26

摘要： A method and system is provided for detecting and performing diagnostics regarding an incipient ground fault that may occur in an electrical propulsion system of a traction vehicle, such as a locomotive, transit vehicle, or off-highway vehicle. The method allows providing a first ground connection for the electrical propulsion system. This first ground connection forms a grounding path generally used by the electrical propulsion system during normal operation. The method further allows providing a second ground connection for the electrical propulsion system. This second ground connection forms a grounding path selectively usable in lieu of the first ground connection. A control strategy is defined for switching between the first ground connection and the second ground connection. A respective leakage current associated with at least one of the first and second ground connections may be monitored. Switching between the first and second ground connections may be controlled based on the monitored leakage current associated with at least one of the first and second ground connections.

公开(公告)号：US06781808B2

公开(公告)日：2004-08-24

申请号：US09828382

申请日：2001-04-06

申请人： Ajith K. Kumar ,  Jeremy McGarry

发明人： Ajith K. Kumar ,  Jeremy McGarry

IPC分类号： H02H908

CPC分类号： B60L3/0023 ,  B60L2200/26

摘要： A method for detecting electrical faulty conditions in a plurality of power devices of a propulsion system is provided. The plurality of power devices is connectable in parallel circuit through a direct current (DC) link to an external DC power source. The method provides a first sequence of actions for determining an electrical short condition in at least one of the power devices upon the power source being connected. The method further provides a second sequence of actions for determining an electrical open condition in a respective one of the plurality of power devices during the occurrence of high current events.

摘要翻译： 提供一种用于检测推进系统的多个功率装置中的电气故障状况的方法。 多个功率器件可通过直流（DC）连接到外部DC电源的并联电路中连接。 该方法提供用于在电源连接时确定至少一个功率器件中的电短路状况的第一动作序列。 该方法进一步提供用于在发生高电流事件期间确定多个功率器件中的相应一个功率器件中的电开路状态的第二动作序列。