| 摘要 |
PURPOSE:To enhance the shielding effect of a motor-driven equipment and to suppress the spark noise of the device by combining a toroidal coil, a through condenser and conductive paint. CONSTITUTION:When a drive motor of a drive unit (b) is rotated, spark noise generated between a commutator and motor brushes 9, 9' is suppressed through a motor frame metal 6, conductive paint coated on the inner surface of a non- conductive case 1, a shielding circuit made of a metal plate 3, and a power source via condensers 4, 4' through toroidal choke coils 10, 10' to motor brushes 9, 9' in an electric circuit. |
