SLIP CONTROL DEVICE OF ELECTRIC AUTOMOBILE

摘要

Provided is a slip control device that is of an electric automobile and that can perform accurate traction control even during vehicle takeoff and in a low-speed region. The slip control device (20) is provided with a threshold calculation means (18), a means (21) for observing the driven wheel rotational frequency, an angular acceleration calculation means (22), an angular acceleration comparison means (26), a slip determination means (23), a torque release means (25), a means (19) for setting a baseline rotational frequency, and a torque recovery means (29). When the current rotational frequency of the driven wheel (6) observed by the means (21) for observing the driven wheel rotational frequency has fallen to or below a stipulated rotational frequency, the means (19) for setting a baseline rotational frequency causes the rotational frequency of the driven wheel (6) before the point in time that the torque release means (25) has determined that a slip has occurred to be a baseline rotational frequency, and when the current rotational frequency of the driven wheel (6) is greater than the stipulated rotational frequency, the rotational frequency of the driven wheel (6) at the point in time that a slip has been determined to have occurred by means of the torque cancelling means (25) is caused to be the baseline rotational frequency.