| 摘要 |
As a driven pulley for driving the rotary shaft of an alternator, a one-way clutch built-in type pulley is used. The fluctuation range of the angular velocity per rotation of the rotary shaft is set to be less than a half of the fluctuation range of the angular velocity per rotation of the driven pulley by setting restriction to the relation between the inertial moment with respect to this rotary shaft and the resistance against rotation of the rotary shaft, thereby suppressing a noise called squeal without enlarging a driving portion of an alternator or deteriorating the efficiency in electric power generation.
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