| 摘要 |
<p>PURPOSE:To obtain, in a stable state, a transformation ratio which is larger than a turn ratio by a method wherein a gap is formed in a primary-winding installation part of an iron core and a primary winding is inserted into this gap. CONSTITUTION:An amount of a magnetic flux interlinked with a secondary winding is dependent on a magnetomotive force of a primary winding and on an area ratio of the primary winding to the secondary winding. Then, a gap 15 is formed at a primary-winding installation part of an iron core 8; a primary winding 11 is inserted into the gap 15; the iron core is attached in such a way that an effective area in which its magnetic flux is interlinked with a secondary winding 12 is smaller than an area of the secondary winding 12. When an area ratio of the primary winding 11 to the secondary winding 12 is adjusted, a transformation ratio can be adjusted. Accordingly, an influence of an inductance component is small; a problem of a resistance temperature coefficient is not caused; when a spacer or the like is installed in the gap, the primary winding can be fixed easily to the iron core. Thereby, the transformation ratio which is larger than a turn ratio can be obtained in a stable state.</p> |
