抄録
By combining a stationary test result of measurement of noise source generated from induction traction motor with filed test results of measurement of under vehicle noise in train running conditions, we have examined a method to separate the noise source from driving devices in train running conditions. The method takes advantage of a phenomenon such that a high-speed region in the noise measurement for the induction traction motor under the stationary test becomes dominant by the sixth power rule in aeroacoustics. We present our overview as described chiefly on the characteristic of the induction motor and the method separating the noise source from the driving devices.
