ELECTRIC BRAKING SYSTEM CONSIDERING RAIL GRADE FOR ELECTRIC RAIL CAR

摘要

PURPOSE: An electric braking system is provided to improve performance of a motor car by stably stopping the motor car without using air braking. CONSTITUTION: An inverter(120) controls a traction motor(110) according to a setting braking torque. A load torque estimator(130) estimates the load torque of the traction motor according to a rail grade. A braking mode switch unit(140) converts a first braking mode into a second braking mode. The setting braking torque has a fixed value in the first braking mode. The setting braking torque is gradually decreased in the second braking mode. A pause control unit(150) reduces the setting braking torque based on the rotation speed and the estimated load torque of the traction motor.