Resistors for dynamic braking
    21.
    发明授权

    公开(公告)号:US10665369B1

    公开(公告)日:2020-05-26

    申请号:US16193717

    申请日:2018-11-16

    Abstract: A resistor of a powered system includes an elongated body that extends from a first terminal end to an opposite second terminal end. The body forms a continuous path that extends from the first terminal end to the second terminal end and that forms a disc. The body is configured to receive electric current from the powered system at the first terminal end and conduct and provide electric resistance to the electric current received from the powered system to dissipate at least part of the electric current as heat from the body. The second terminal end of the body is configured to be coupled with at least one other resistor of the powered system in one or more of a parallel or series arrangement in an electric circuit.

    System and method for controlling a vehicle

    公开(公告)号:US10384546B2

    公开(公告)日:2019-08-20

    申请号:US15149665

    申请日:2016-05-09

    Abstract: A braking system includes a drive system having a traction motor coupled in driving relationship to a wheel of a vehicle, a braking device configured to brake the vehicle, and a control unit. The motor is configured to provide both motive power for the vehicle in a propel mode of operation and retarding effort to brake the vehicle. The control unit is configured to determine a total retarding effort required to brake the vehicle in a braking mode of operation, and an amount of traction motor retarding effort available from the traction motor. The control unit is further configured to control the traction motor and the braking device so that at least one of the traction motor and the braking device brake the vehicle in the braking mode of operation.

    Electric ground fault detection system and method

    公开(公告)号:US10132850B2

    公开(公告)日:2018-11-20

    申请号:US15232969

    申请日:2016-08-10

    Abstract: A system for testing a ground fault detection system in an electric circuit establishes a ground connection between a bus and the ground via an inverter and a load by closing an inverter switch of the inverter and a grounding switch disposed between the load and the ground, determines whether the ground connection is detected, and determines a fault in the ground fault detection system responsive to the first ground connection not being detected by the ground fault detection system. Optionally, a ground fault may be identified by determining three phase voltages provided from each of plural inverters, determining symmetrical components of the three phase voltages for each of the inverters, and identifying a ground fault in one or more of the inverters while powered by the power supply based on the symmetrical components.

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