CHOKE COIL

摘要

Problem to be Solved;To provide a choke coil that can apply an optimal magnetic bias even when the current increases and can be reduced in size, weight and cost.;Solution;The present invention provides a choke coil including a coil (6) and a core (1) including a first core part (5) inserted into a central hole of the coil (6) and a plurality of second core parts (4) disposed along the outer periphery of the coil, the first core part (5) and the second core part (4) forming a closed magnetic path, wherein the second core parts (4) are shaped so that the total sum of the areas of cross sections thereof perpendicular to the axis of the coil is greater than the area of a cross section of the first core part (5), a gap part (G) is formed in the second core parts (4), and a ferrite magnet (7) that applies a magnetic bias is disposed in the gap part (G).

主权项

1. A choke coil, comprising:
a coil; and a core comprising a first core part inserted into a central hole of the coil and a plurality of second core parts disposed along an outer periphery of the coil, the first core part and the second core part forming a closed magnetic path, wherein the second core parts are shaped so that the total sum of areas of cross sections thereof perpendicular to an axis of the coil is greater than the area of a cross section of the first core part, a gap part is formed in the second core parts, and a ferrite magnet that applies a magnetic bias is disposed in the gap part.