Experimental research of traction motor system for electric vehicle base on sound tensity

The traction motor of electric vehicle is differing from the general industry traction motor completely. Not only frequently start, parking, accelerate, decelerate and low speed, but also high torque in climbing slope, low torque in high speed and wide range speed are requested. Base on the theory of sound intensity, the experiment of noise are study through the measurement at discrete points. The sizing grid is 10 mm×10 mm, The sound intensity map of traction motor are protracted at 1000 r/min and the result show that the main noise sources are fan, gear-box and the traction motor in turn. © by High Technology Letters Press.