| Title |
Series Connected DC/DC Converter for Fuel Cell System using Variable Phase Shift Switching Method |
| Authors |
Noh-Sik park ; Soon-Jae Kwon ; Sung-Jun Park |
| Keywords |
Fuel cell power system; Series DC/DC converter; Variable phase shift switching; High voltage ratio |
| Abstract |
The proposed method offers an improved control method for high power density AC/DC adapter by using more energy efficient electrical equipments. Power factor correction (PFC) topology is based on boost topology with boundary conduction mode (BCM). DC/DC topology is based on half-bridge topology with fixed 50% duty and newly introduced off-time control method, which helps to reduce size of the semiconductor and the magnetic devices. Test results with 85W AC/DC adapter (18.5V/4.6A) design show that the measured efficiency is 90% with power density of 36W/in3. It also shows low no load power consumption of about 0.5W. |