초록 ▼

To determine the timing of the electrical brake for completely stopping in electrical braking control, and also to achieve both sure stopping and good riding comfort in an electric vehicle powered by the motor by decreasing the braking force at a prescribed rate of change, the torque of the electric

To determine the timing of the electrical brake for completely stopping in electrical braking control, and also to achieve both sure stopping and good riding comfort in an electric vehicle powered by the motor by decreasing the braking force at a prescribed rate of change, the torque of the electric motor is controlled by controlling the power converter which powers the motor using a power converter controller. The deceleration of the motor is computed based on the detected speed of the electric motor which is as an output of the speed detection means, the subsequent speed of the electric motor is estimated based on the detected speed and the deceleration rate of the electric motor at the time the detected rotational speed of the electric motor falls below a prescribed speed, and torque control is carried out using an electric power converter controller, based on the estimated speed.

대표청구항 ▼

1. A control apparatus for an electric vehicle comprising an electric power converter for at least an electric motor, a speed detector for detecting the speed of said electric motor, a controller for controlling said electric power converter to control the torque of said electric motor, and a comput

1. A control apparatus for an electric vehicle comprising an electric power converter for at least an electric motor, a speed detector for detecting the speed of said electric motor, a controller for controlling said electric power converter to control the torque of said electric motor, and a computing unit for computing deceleration, based on the detected speed of said electric motor which is output by said speed detector, whereinon the basis of the detected speed of said electric motor and the deceleration at the time when the detected speed of said electric motor falls below a prescribed speed, a subsequent speed of said electric motor is estimated; and torque control of said electric motor is carried out by said controller, based on the estimated speed.