| 摘要 |
In an AC-to-DC converter, a switched inductor, in the form of a ringing-choke or flyback DC- to-DC power converter, is interposed between the AC line input rectifier and the DC storage capacitor. In accordance with the relationship Inducatance/Time equals Voltage/Current the inductance and on-time of the switched inductor are held constant so that the instantaneous input voltage and current maintain a directly proportional relationship, thereby imparting a resistive characteristic to the input impedance - i.e., the input reactance vector is held to near zero rotation. Hence, the input power factor is held close to unity. Means are included for varying the values of the inductor and/or time in response to changing load requirements. <IMAGE> |
