| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a light-weight motor device capable of reducing noise in an FM band and a DAB band. <P>SOLUTION: In a motor drive circuit 1, an air-core coil 8 and a capacitor 9 which are noise elimination devices are connected between a motor brush 6P/6M and a yoke 5. The air-core coil 8 is formed by spirally winding a bus bar 11 between the motor brush 6P/6M and the yoke 5, while the capacitor 9 is formed by providing a dielectric body 12 between the bus bar 11 and the yoke 5. A self-resonant frequency of the capacitor 9 is set to an FM band and the self-resonant frequency of the air-core coil 8 becomes larger than that of the capacitor, thereby a noise can be reduced in the FM band and the DAB band. <P>COPYRIGHT: (C)2012,JPO&INPIT |
