| 摘要 |
PURPOSE:To simplify the circuit configuration by connecting a current detector with the secondary winding of a transformer, further connecting a current transformer coupled electromagnetically with the secondary winding side, and turning ON and OFF a transistor of the primary winding side on the basis of the output of the detector. CONSTITUTION:A transformer 110 has the sole primary winding 103 and a plurality of secondary windings 211, 221. A current detector 226 is connected with the winding 221, and the winding of an electromagnetically coupled current transformer 225 is connected with the windings 211, 221. A controller 1 controls to turn ON and OFF a transistor 102 connected with the primary winding 102 on the basis of the output of a current detector 226. |
