TRAIN BRAKING APPARATUS AND TRAIN BRAKING METHOD

The train braking device includes an air brake controller 3 in which a plurality of friction coefficients corresponding to a brake command 2D and a brake initial velocity are stored, an electropneumatic conversion valve 4 that converts a pressure control signal 3D transmitted from the air brake controller 3 into a pneumatic signal, a relay valve 5 that generates a predetermined brake cylinder pressure 5D corresponding to the pneumatic signal, and a brake cylinder 7 that controls brake shoes 8 according to the brake cylinder pressure 5D, wherein the air brake controller 3 generates the pressure control signal 3D based on the friction coefficients corresponding to the brake command 2D and the brake initial velocity.