| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem that such a state is brought about as a predetermined acceleration is not naturally obtained during idling, by adhesion control algorithm reducing a command torque through idling detection, though the command torque of a motor is originally set to operate a vehicle at the predetermined acceleration. SOLUTION: A difference speed between a vehicle speed corresponding to the sliding velocity of a wheel and a rail and a motor rotating speed is detected, and then usual torque control is performed while this value is a prescribed value or less. The adhesion control algorithm is applied in a state in which the difference speed continues to increase while a predetermined torque command value is kept, wherein the adhesion control algorithm is additionally provided with torque reduction characteristics corresponding to a deviation from a target limit value of the difference speed. An electric vehicle controller is provided that can obtain the predetermined vehicle acceleration even if it is in an idling state. In conventional adhesion control, control is performed to make the sliding velocity low to the utmost, assuming a tangential force peak shown in a left-hand side of Fig. 5. The acceleration of the vehicle can be secured by enabling the utilization of the tangential force near the right in Fig. 5, and on-time operation can be attained. COPYRIGHT: (C)2009,JPO&INPIT
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