| 摘要 |
<P>PROBLEM TO BE SOLVED: To restrict sound noise in a burst operational mode and make a transformer operated stably. <P>SOLUTION: The transformer drive system includes a bridge controller 1 and a bridge circuit 2. In the burst operational mode, pulse widths of first and final pulse voltages Vh1, Vh2 in a voltage supply period Tn are made narrower than those of the other pulse voltages through the bridge controller 1 and at the same time, the following pulse suspension period after each pulse voltage is made almost constant, so there is no possibility that a peak value of magnetic flux flow I in a transformer 3 may become higher than the final peak value. <P>COPYRIGHT: (C)2010,JPO&INPIT |
