CONTROL DEVICE OF ELECTRIC VEHICLE

摘要

PROBLEM TO BE SOLVED: To make it possible to mitigate gear hammering sound upon switching between brake and drive of a motor without accompanying operation delay of other controls of traction control (TCS) etc.SOLUTION: A determination part 12 sets a flag FLAGtcs as 1 to command to start TCS when determining a drive slip of a wheel 3 from a motor rotation number Nm and vehicle speed VSP. During FLAGtcs=1, an operation part 13 finds a TCS motor torque command value tTm_tcs from an amount of torque lowering for drive slip prevention and a target motor drive torque tTm obtained in an operation part 11, and the drive slip is mitigated by motor derive force control using this. A determination part 14 detects polarity inversion of motor torque when tTm_tcs becomes zero, and sets a flag FLAGrvs as 1. A generation part 15 sets a friction brake command value Tbr as Tbr>0 upon receiving FLAGrvs=1, and, through an electric brake booster 9, sets the brake liquid pressure to a caliper 7 as a liquid pressure at which Tbr is realized.