抄録
Efficient wave form was examined from the temperature rise and the rotational speed.result of measurement, the temperature rise of the motor looked like the first order log and there was hardly a difference of the rotational speed between the traveling wave and the noised wave. In addition, the temperature rate of increase was able to be suppressed by noise wave. As a result, It has been understood that the temperature is lowered without reduces the speed of rotation .if a small amount of noise is added to the wave..
