Hi am Kansh i would like to get details on PFC simulation ..My friend Kanka said PFC simulation will be available here
Thank ypu
Hi am Kansh i would like to get details on PFC simulation ..My friend Kanka said PFC simulation will be available here
Thank ypu
Posts: 8,059
Threads: 1
Joined: Mar 2014
boost power factor preregulator control matlab simulink file
Introduction
In order to increase the switching frequency while maintaining acceptable efficiency, several soft switching techniques have been developed [1,2,3]. Most of these resonant techniques increase the semiconductor current and/or voltage stress, leading to larger devices and ncreased
conduction losses due to greater circulating current. A new class of converters has been developed [4], however, that allow an increase in switching frequency without the associated increase in switching losses, while overcoming most of the disadvantages of the resonant
techniques. Zero voltage transition (ZVT) converters operate at a fixed frequency while achieving zero voltage turn-on of the main switch and zero current turn-off of the boost diode. This is accomplished by employing resonant operation only during switch transitions. During the rest of the cycle, the resonant network is essentially removed from the circuit and converter operation is identical to its nonresonant counterpart. This technique allows a improvement in efficiency over the traditional boost converter, as well as operating the boost diode with reduced stress (due to controlled di/dt at turn-off). Soft-switching of the diode also reduces EMI, an important system consideration. Active power factor correction programs the input current of the converter to follow the line voltage and power factors of 0.999 with THD of 3% are possible. The Unitrode UC3855A/B IC incorporates power factor correction control circuitry capable of providing high power factor with
several enhancements relating to current sensing and ZVT operation of the power stage. The UC3855 incorporates all of the control functions required to design a ZVT power stage with average current mode control. Average current mode control has been chosen for its ability to
accurately program the input current while avoiding the slope compensation and poor noise immunity of other methods
