| 摘要 |
A power factor correction converter includes a bridge diode 30, a booster section 22 controlled for improving a power factor of the bridge diode, a transformer section T supplied with an output of the booster section via a primary coil side to excite it to a secondary coil side, a switch S for switching the output of the booster section, an output section 34 for rectifying and smoothing the output of secondary coil side of the transformer section, a control section 36 for sensing an output voltage of the output section and thus control the switch S and a delay section 40 operated for applying a stable voltage to the transformer section by controlling a switch S1 of the booster section 32 according to the output of the control section 36, so that the booster section is controlled for decreasing the harmonic current by the delayed output of the delay section to constantly maintain the output voltage and thereby improve the power factor. The delay section 40 is described in detail (Fig 4). |
