| 摘要 |
PURPOSE:To reduce the size of a circuit by providing a current transformer having a common series winding to output windings of a step up/down transformer. CONSTITUTION:A DC power source 2 and a DC interrupting transistor 3 are connected in series with an input winding 1<0> with a step up/down transformer 1 having one input winding 1<0> and two output windings 1<1>, 1<2>. A current detector 5 is provided only at the winding 1<1>, the primary side windings of current transformers 11, 12 are further connected between the windings 1<1>, 1<2> and loads 113, 123, and the secondary windings are connected in series. Thus, voltages are induced in the windings 1<1>, 1<2> by the ON and OFF of the transistor 3 by a controller 4, rectified and smoothed by rectifying and smoothing circuits 111-122 to supply load currents I01, I02. The current I01 is stabilized by the controller 4 through the detector 5, and the current I02 is also stabilized through a current transformer 12 by the secondary side current of the transformer 11. |
