| 摘要 |
<p>PURPOSE:To reduce loss by reducing alternating current resistance of a chalk and a transformer for a switching power supply. CONSTITUTION:In a winding constructing a chalk 1 or a transformer 4, there are provided a new primary windings 2, 3 and auxiliary windings 5, 6 with a winding material having an alternating resistance less increased than the primary windings 2, 3 and having the same number of windings as that of the primary windings 2, 3. The primary windings 2, 3 and the auxiliary windings 5, 6 are interconnected in parallel in the direction of winding where their inductances do not disappear, and a DC component many currents flowing through the chalk 1 and the transformer 4 chiefly flows through the primary windings 2, 3 while an alternating component chiefly flows through the auxiliary windings 5, 6. Hereby, there is reduced a loss due to alternating current resistance in the case where the chalk or the transformer is employed at a high frequency.</p> |
