In addition, the fracture of the cardan shaft cm be detected
through measuring difference between the rotational speeds
of two motor of the same bogie, When difference of speed
reaches limitation, the signal is send out to cut off the power
of the bogie frame motor, as the same this information is
send out to the driver. Then the driver will stop the train to
examine and solve the problems. After this, drive the train to
stop parking area at the speed of 80 kdh.