Electric vehicle and control method of electric vehicle

摘要

An electric vehicle driven by a synchronous motor 21 and an induction motor 31, and braked with a first regenerative torque BT1 generated by the synchronous motor generator 21 and a second regenerative torque BT2 generated by the induction motor generator 31. The ratio of the first regenerative torque BT1 to the second regenerative torque BT2 is changed in accordance with a state of charge (SOC) of a battery 11. In this way, a switching frequency from a regenerative brake to a hydraulic brake is restricted to improve drivability when a state of charge (SOC) of the battery 11 is high.

主权项

1. An electric vehicle comprising
a synchronous motor; and an induction motor; wherein the electric vehicle is driven by the synchronous motor and the induction motor, and braked with a first regenerative torque generated by the synchronous motor and a second regenerative torque generated by the induction motor; the electric vehicle further comprises a battery which supplies a drive electric power to the synchronous motor and the induction motor, and receives a regenerative electric power from the synchronous motor and the induction motor; and a controller which adjusts the first regenerative torque and the second regenerative torque, and the controller includes a torque setting unit which changes a ratio of the first regenerative torque to the second regenerative torque in accordance with a state of charge of the battery.