| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce common mode noise, in a winding type common mode filter.SOLUTION: A common mode filter 1 comprises: a drum core 11 having a winding core 11a; and first and second wires W1, W2 wound around the winding core 11a. The winding structure by the first and second wires W1, W2 comprises: a first winding block BK1 provided on one end side of the winding core 11a in the longitudinal direction; and a second winding block BK2 provided on the other end side of the winding core in the longitudinal direction. The first winding block BK1 and second winding block BK2 have a substantially symmetrical winding structure including the positional relationship of the first and second wires W1, W2. Positional relationship of the first and second wires W1, W2 is asymmetrical in the first winding block BK1 and second winding block BK2. A space is provided between the first winding block BK1 and second winding block BK2.</p> |
