| 摘要 |
PURPOSE:To prevent the generation of leakage flux running at right angle to the directivity of a magnetic shield as well as to contrive reduction in loss of a magnetic shield by a method wherein a horseshoe-shaped magnetic shield is provided at the end of a winding on the outside of the core window only. CONSTITUTION:Outside the core window 8 formed by a core leg 3, side legs 4a and 4b, yoke cores 5a and 5b and the like, the horseshoe-shaped magnetic shield 9a, 9b and the like, the on which a grain-oriented silicon steel plate is radially laminated in such a manner that they have the directivity between the cores 5a and 5b, and clamping plates 7a and 7b in radial direction of a winding 6, are provided in such a manner that they are laminated on the upper and the lower parts of the winding 6 on the side (on the side of the winding 6) inner than the cores 5a and 5b. By having the constitution above-mentioned, the leakage flux phi directly flows into the cores 5a and 5b in the core window 8, and therefore, the leakage flux does not flow in the direction at right angle to the enabling to sharply reduce the loss of the shields of 9a, 9b and the like. |
