Improved Hysteresis Current Control of a Single Phase, Three Level, Double PFC Converter

Single ended, single phase, power factor corrector (PFC) Boost Converter, is one of the most popular AC/DC converters, because of a number of advantages i.e. its step up voltage ratio, simplest topology and high efficiency. However, for high voltage or high power applications, three level PFC converter is one of the most promising solutions. For high power applications, current operation frequency and Bandwidth must be limited to avoid Electromagnetic EMI interference. This paper presents a fixed frequency hysteresis current control for Three level Single-Phase, Boost double PFC Converter. The proposed methodoly presents hysteresis current control with adaptive band error to constrain switching frequency for a given range. A fast response, a relative small bandwidth and reduced harmonic content are qualities of the technique proposed; furthermore, coupling Output Voltage problem is avoided, by means of compensating current reference. Simulation results confirm the proposed technique.