| 摘要 |
A linear transformer power supply that extracts a high level of energy from a linear transformer during the full cycle of AC input voltage, includes a transformer 10 having a primary winding 10 a that receives an alternating current (AC) input voltage and a secondary winding 1Gb which produces an AC output voltage. A rectifier 12 is connected to receive the AC output voltage from the secondary winding 1Gb of the transformer 10 and to produce a rectified output voltage. A capacitor 14 is connected to receive the rectified output voltage; the resulting voltage on the capacitor 14 defines an output voltage of the power supply. A switch 16 is connected such that, when in a closed position, the switch 16 shorts the secondary winding 1Gb of the transformer 10 and causes energy to be stored in the primary and secondary leakage reactances of the transformer 10, and when in an open position, allows the stored energy in the primary and secondary leakage reactances to pass through the rectifier 12 to the capacitor 14. A controller 32 opens and closes the switch 16 at a duty cycle and frequency that develops a quasi-sinusoidal current being drawn from the AC input voltage. The duty cycle and frequency may substantially match the leakage reactances of the primary and secondary windings of the transformer 10. - -- - - - - - - - - - -- C/2 t: o 0 z ::14 F- i |
