| 摘要 |
<p>PURPOSE: To suppress generation of noise due to magnetic distortion, by filling in an air gap with a packing material of a single component having a prescribed Shore hardness with respect to temperature. CONSTITUTION: An air gap 6 of the transformer consisting of a ferrite-made magnetic closed circuit is filled in with a packing material 15 of a single component having a prescribed Shore hardness with respect to temperature. The packing material 15 desirably has a Shore hardness of 30 at 25 deg.C, and a polysulfide group packing material or a polyurethane group packing material is adopted for the material 15. The single component packing material is of self-adhesion, sufficiently flexible to cushion vibration and cured without causing contraction due to the lapse of time. Thus, generation of unpleasant noise due to magnetic distortion is suppressed.</p> |
