A generalized technique for derivation of average current mode control laws for power factor correction without input voltage sensing

This paper presents a general technique for derivation of average current mode controlled (ACMC) laws to achieve high power factor for single-phase topologies operating in CCM. The control laws are derived based on the steady-state input-output voltage relationships and the CCM large-signal averaged PWM-switch model. Using this methodology average CMC laws with linear PWM waveforms, which provide high power factor without the need for input voltage sensing are discovered. Conventional 3-loop controlled average CMC converters can now be controlled with a 2-loop architecture. Hardware results for a boost PFC and simulation results for flyback topology verify operation