Patent ID: 6483726
Filing Date: 2002-11-19
Classification: H02M

Abstract:
A flyback power converter comprising:a transformer for transferring an input voltage from a primary side to a secondary side; said secondary side includes a main output loop and at least one auxiliary output loop connected in series with a magnetic amplifier; a pulse width modulation (PWM) controller controlling a switch on said primary side of said transformer for turning on and off said switch and turning off and on said main output loop respectively in synchronization with said switch; said auxiliary output voltage loop further includes a magnetic amplifier controller for controlling a magnetization saturation and reset of said magnetic amplifier in synchronization with an on-off sequence of said main output loop followed by an on-off sequence of said auxiliary output loop during a time-period when said switch is off and for providing a stabilized auxiliary output loop voltage depending on said magnetization saturation and reset of said magnetic amplifier.