Title :
Design of a simple high-power-factor rectifier based on the flyback converter
Author :
Erickson, Robert ; Madigan, Michael ; Singer, Sigmund
Author_Institution :
Dept. of Electr. & Comput. Eng., Colorado Univ., Boulder, CO, USA
Abstract :
An equivalent circuit model for the discontinuous conduction mode flyback converter based on the loss-free resistor concept is presented. This simple model correctly describes the basic power processing properties of the converter, including input port resistor emulation, output port power source characteristics, and control characteristics. Based on this model, steady-state design equations are described and are used in a design example. Design of the slow output voltage feedback loop is also considered. A small-signal AC model is developed for both the resistive load and the DC-DC converter-voltage regulator load cases. In addition, a simple first-order approximation for the line current distortion and phase shift caused by 120 Hz duty cycle variations is derived.<>
Keywords :
equivalent circuits; power convertors; rectifiers; 120 Hz; DC-DC converter-voltage regulator load; control characteristics; equivalent circuit model; flyback converter; high-power-factor rectifier; input port resistor emulation; loss-free resistor concept; output port power source characteristics; resistive load; small-signal AC model; steady-state design; DC-DC power converters; Emulation; Equations; Equivalent circuits; Feedback loop; Rectifiers; Regulators; Resistors; Steady-state; Voltage;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 1990. APEC '90, Conference Proceedings 1990., Fifth Annual
Conference_Location :
Los Angeles, CA, USA
DOI :
10.1109/APEC.1990.66382
