| 摘要 |
PURPOSE:To suppress vibration or noise due to collision of gears by increasing regenerative brake torque when the rotational fluctuation detected from the output shaft of decelerator in an electric car exceeds a predetermined reference value. CONSTITUTION:DC output from a battery 32 is inverted through an inverter main circuit 30 into AC power for driving a motor 10. Rotation of the motor 10 is decelerated 12 and transmitted through a hook joint 16 and a propeller shaft 14 to a differential 18 in order to rotate a wheel 20. A rotational speed detecting section 38 mounted on the decelerator 12 detects the rotation speed (n) at the time of OFF acceleration and during brake operation. Variation of the rotational speed (n) with time dn/dt is inputted to the rotational variation detecting means 40 in a controller 34 in order to detect rotational variation which is then subjected to comparison 42. When thus detected rotational variation exceeds a reference value, a brake torque control means 44 increases a regenerative brake torque. |
