| 摘要 |
<p>An arc length-contacting with a commutator-of two brushes in a rotational direction of a motor is defined as not more than 5% of an outer rim length of the commutator, i.e., not more than πx/20, where A is an outside diameter of the commutator. A number of shorted segments of the commutator-the short is caused by the brush-is minimized, so that reduction in output of the motor can be prevented. As a result, the motor employed in a car product or an electric tool can be downsized and light-weighted.</p> |
