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    • 1. 发明公开
    • A VEHICLE SYSTEM, AND A METHOD FOR SUCH VEHICLE SYSTEM
    • 车辆的系统和方法对于这样的车辆系统
    • EP3039782A1
    • 2016-07-06
    • EP14755819.1
    • 2014-08-26
    • BorgWarner TorqTransfer Systems AB
    • NILSSON, JohanNILSSON, Peter
    • H02P23/00H02P23/12H02P23/14
    • B60L15/20B60L3/12B60L11/1805B60L15/04H02P7/06H02P23/0022H02P23/0031H02P23/12H02P23/14Y02T10/645Y02T10/7258
    • A vehicle system (10) is provided. The vehicle system comprises an electrical DC motor (11) driving a load (12), such as a hydraulic pump, and a control system (100) for controlling the speed of the electrical motor (11). The control system (100) comprises a system (20) for monitoring and controlling the speed of the electric DC motor in view of a reference commutation signal (S
      R ), wherein the electrical DC motor is associated with a drive current signal (I
      D ), and wherein the drive current signal (I
      D ) comprises information relating to the commutation signal of the electrical DC motor. The system (20) comprises a speed estimation unit (23) for estimating a commutation signal (S
      E ) from the drive current signal (I
      D ), said commutation signal (S
      E ) corresponding to an estimated motor speed; a filter unit (25) configured to apply a first filter on the drive current signal (I
      D ), said first filter being selected based on the estimated commutation signal (S
      E ), thereby resulting in a filtered drive current signal, and a speed detector unit (26) for detecting the actual commutation signal (S
      M ) from the filtered drive current signal. If the detection of the commutation signal (S
      M ) is unsuccessful the speed estimation unit (23) is based upon the receipt of a signal (S
      M-NO ) from the speed detector unit (26) configured to transmit an estimated commutation signal (S
      E ) to a control unit (28), wherein the control unit (28) is configured to provide a control signal comprising information of a comparison between the reference commutation signal (S
      R ) and the estimated commutation signal (S
      E ) and indicating a required updated drive signal (I
      D ).