Interleaved Voltage-Doubler Boost Converter for Power Factor Correction

An Interleaved Voltage-Doubler Boost Converter (IVDBC) using digitalized average current control to achieve Power Factor Correction (PFC) is proposed in this paper. The basic circuit configuration of proposed IVDBC is a two-phase interleaved boost converter and a full-wave voltage-doubler rectifier in series. The capacitors of the voltage-doubler circuit are charged alternately by the two-phase interleaved operation; therefore, the voltage conversion gain of the IVDBC is twice that of a conventional interleaved boost converter. Consequently, the proposed IVDBC is probable to be used for high-voltage applications. A TI TMS320F28335 is used in this paper to design and implement the average current control scheme for the IVDBC. A prototype circuit with an AC input voltage of 110V, DC output voltages between 400V to 700V and a rated output current of 1.4A is realized in this paper. Experimental results indicate that the Total Harmonic Distortion (THD) and power factor of input current of the proposed IVDBC for PFC can conform the requirements of international regulations. Besides, a maximum conversion efficiency of 94.07% can be achieved.