| 摘要 |
<p>In a switching power supply apparatus, two mutually coupled inductors 41a, 41b are connected to both ends of a primary winding of a transformer, and a pair of switching units 21, 22 and a pair of switching units 23, 24 are connected to the other ends of the inductors 41a, 41b, respectively, while two diodes 51, 52 are connected at one end to both ends of the primary winding of the transformer and at the other end to a power supply, wherein the pair of switching units 21, 22 and the pair of switching units 23, 24 each constitute a series circuit in which the two switching means alternately turn on and off with a dead time period between the turning off of one switching unit and the turning on of the other switching unit, and wherein a voltage phase difference at a connection point between the two series circuits is 180 DEG and the duty ratio of each of switching units is controlled. <IMAGE></p> |
