Operating Characteristics Analysis Of Bi-Directional DC/DC Converter using PFM control with high efficiency at whole load range

전 부하 영역에서 고효율을 가지는 PFM 제어를 이용한 양방향 DC/DC 컨버터의 동작특성 분석

In this paper, a performance of bi-directional DC/DC converter using PFM control at whole load range is analyzed. A bi-directional DC/DC converter using PFM control in this paper can be soft switching operation with LC series resonant circuit. It's difficult to expect a high efficiency at whole load range in general resonant converter because of limitation of soft switching area. Therefore converter used in this paper has a variable frequency PFM control to overcome a limitation of soft switching area and it makes a high efficiency at whole load range by implementing a soft switching at light load area of restricted soft switching. The high efficiency at whole load range is verified by simulation and experimental result.