Auxiliary output voltage control circuit of flyback power converter with a magnetic amplifier

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 controller for controlling and synchronizing operation sequences of said transformer and said main output loop;
• and
• 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 transformer is turned off and for providing a stabilized auxiliary output loop voltage depending on said magnetization saturation and reset of said magnetic amplifier.

A method for configuring a flyback power converter comprising:

• employing a transformer for transferring an input voltage from a primary side to a secondary side;
• disposing on said secondary side a main output loop and at least one auxiliary output loop connected in series with a magnetic amplifier;
• controlling a switch on said primary side by employing a pulse width modulation (PWM) controller for turning on and off said switch and turning off and on said main output loop respectively in synchronization with said switch;
• connecting a magnetic amplifier in said auxiliary output voltage loop and controlling a magnetization saturation and reset of said magnetic amplifier by employing a magnetic amplifier controller 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.

A method for configuring flyback power converter comprising:

• employing a transformer for transferring an input voltage from a primary side to a secondary side;
• disposing on said secondary side a main output loop and at least one auxiliary output loop connected in series with a magnetic amplifier;
• employing a pulse-width modulation controller for controlling and synchronizing operation sequences of said transformer and said main output loop;
• and
• disposing on said auxiliary output voltage loop 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 transformer is turned off and for providing a stabilized auxiliary output loop voltage depending on said magnetization saturation and reset of said magnetic amplifier.