ELECTRIC-VEHICLE-DRIVE-SYSTEM VIBRATION SUPPRESSION AND CONTROL DEVICE

摘要

PROBLEM TO BE SOLVED: To prevent the limit value of an upper limit torque from fluctuating to follow the vibration of a motor rotation speed, to suppress a fluctuation in a commanded torque to an electric motor, and to prevent the torsional resonance of a drive system at a full acceleration time from being promoted in a case of setting an upper limit for limiting a driver requested motor torque using a map with the motor rotation speed used as a function.SOLUTION: An electric-vehicle-drive-system vibration suppression and control device includes: requested-torque calculation means 35 for calculating a requested motor torque in response to an accelerator opening and a vehicle speed; a motor-torque upper limit map 47 setting an upper limit torque of an electric motor; upper-limit-torque calculation means 37 for calculating the upper limit torque using the motor-torque upper limit map; an upper-limit-torque limiting means 39 limiting the requested torque; torque-command-value output means 41 for outputting a torque command value limited by the upper-limit-torque limiting means 39; and filter means 43 for suppressing vibration of a torsional resonance frequency of a drive system from a motor rotation speed signal input to the upper-limit-torque calculation means 37.