| 摘要 |
<p>PURPOSE:To enable to let a direct current transformer work in the region having excellent magnetic characteristics and linearity of an iron core by a method wherein a bias winding is provided on the iron core of the direct current transformer, and a constant bias current is applied to the bias winding at all times. CONSTITUTION:A bias current I3 is always applied to a bias winding 13 from a DC power source q4 in the direction as shown by the arrows in the diagram. When the number of turns of the bias winding 13 is set at n3, the number of turns of the primary winding 9 is set at n1 and the number of turns of secondary windings 7a and 7b is set at n2, the secondary current I2 runs in the intensity equal to (n3/n2)I3, because the bias current I3 is cancelled when the primary current is I1=0. As a result, the magnetic characteristics of an iron core can be biased, and the direct current transformer can be in the almost linear region of the region B.</p> |
