| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a small-sized motor which includes a noise suppressing circuit that can effectively and surely suppress various noise or broadband noise. <P>SOLUTION: A noise suppressing circuit 2 is attached to the body 1 of a motor. The noise suppressing circuit 2 includes a board 3, lines 31 and 32 (33, 34), a common mode choke coil 4, and capacitors 51, 52A, 52B, 53A and 53B. The board 3 is roughly U-shaped and avoids the interference with the protrusion of an insulating board 12. Lines 31 and 32 form coplanar lines together with a ground line 35, and the capacitor 53A (53B) is a distributed parameter type capacitor. A π-type filter is made of the capacitor 53A (53B), the common mode choke coil 4, and the capacitor 52A (52B). The board 3 is mounted on the insulating board 12, whereby a lower chassis case 11 is covered with it from above, and an adjacent ground layer 36 and the lower chassis case 11 are connected with each other. <P>COPYRIGHT: (C)2010,JPO&INPIT |
