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Electric-vehicle slip control device

  • US 10,202,038 B2
  • Filed: 03/14/2016
  • Issued: 02/12/2019
  • Est. Priority Date: 09/18/2013
  • Status: Active Grant
First Claim
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1. A slip control device for an electric vehicle which is a vehicle including an electric motor configured to rotationally drive a drive wheel, the slip control device performing slip control of the electric vehicle, the slip control device comprising:

  • a drive wheel rotation number observation section configured to observe the number of rotations of the drive wheel;

    a driven wheel rotation number observation section configured to observe the number of rotations of a driven wheel;

    a slip control section configured to perform a series of slip control which determine whether or not a slip state has occurred, on the basis of the number of rotations of the drive wheel observed by the drive wheel rotation number observation section and the number of rotations of the driven wheel observed by the driven wheel rotation number observation section, and which decrease a torque command value to the motor if the slip state has occurred, the slip control section repetitively performing the series of slip control in a control repetition cycle, the control repetition cycle being a time period or periodic time of one cycle of the series of slip control;

    a vehicle speed detection section configured to detect a vehicle speed; and

    a control repetition cycle change section configured to lengthen the control repetition cycle of the slip control section when the vehicle speed detected by the vehicle speed detection section is in a predetermined low-speed range of 0-10 km/h.

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