| 摘要 |
PURPOSE:To dissolve a tight corner braking phenomenon by providing a control device setting the output current of a motor to zero when front wheels generate a braking force in a 4WD vehicle transmitting the driving force to front wheels via the motor. CONSTITUTION:A motor 11 is constituted of a rotor 12, a stator 13, and a resistor 15 connected to an output terminal 14 provided on the rotor 12, and the stator 13 is connected to the driving device 1 side. A diode 16 is connected in series with the resistor 15 to constitute a control device 21. When the rotating speed of front wheels exceeds that of rear wheels and front wheels generate a braking force, the diode 16 cuts off the reverse current generated in the motor 11. At the time of low-speed turn, when the rotating speed of front wheels exceeds that of rear wheels and front wheels generate a braking force, the reverse current tends to flow, but this current is cut off by the diode 16, thus the power generation braking by the motor 11 is prevented, and the rotation restraint of front wheels and rear wheels is cut off.
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