| 摘要 |
PURPOSE:To provide a low cost DC power circuit capable of sufficiently improving a power factor and attaining the inhibition of higher harmonic distortions in spite of small-sized and light-weight constitution. CONSTITUTION:AC input voltage Vin is rectified by a main rectifier 6, and smoothed by a smoothing circuit 18, thus acquiring output voltage Vo. A sub- rectifier 7 is connected to the AC-side both input terminals of the main rectifier 6. The pulsating current output of the sub-full-wave rectifier 7 is converted into auxiliary currents 12 by a current adjusting circuit 8 while the auxiliary currents 12 are overlapped to main currents 11 output from the main rectifier 6, thus obtaining synthetic currents 13. Accordingly, insufficient sections for enhancing a power factor and higher harmonic distortions by main currents 11 are supplied by auxiliary currents 12, thus realizing sufficient improvement in the power factor and the attainment of a higher-harmonic control reference. |
