| Title |
A study on the harmonic attenuation of the BF Converter |
| Authors |
Tae-Sup Choi ; In-Soo Ahn ; Seung-Ha Lim ; Sug Chin Sakong |
| Abstract |
In this paper, we realize the active PFC(Power Factor Correction) system of BF(Boost Forward) converter with PWM-PFM(Pulse Width Modulation-Pulse Frequency Modulation) control technique to control DC output voltage, to remove the noise like harmonics at output voltage, and to control the input current with sinusoidal wave synchronized by the source voltage. To achieve the desired load voltage and improved PFC, we first implement current shaping control at the inverting stage and make the converted output DC voltage with forward converter. After making the ratio of output voltage to current as 50V/1A and the duty ratio greater than 0.5. When input voltage is 30V and boost inductance is 1.1mH. we control the voltage changing rate according to the variation of load resistance using a PWM-PFM control technique. And finally we prove experimentally, We attenuated its harmonics and improved PF up to 0.96 using the current shaping technique. |