Title :
Step-up ZVS full-bridge converter with loss reduction by forward energy-delivered circuit
Author :
Hsieh, Guan-Chyun ; Yang, Tuzng-Hang
Author_Institution :
Dept. of Electr. Eng., Tungnan Univ., Taipei
Abstract :
A forward energy-delivered technique is proposed to reduce the power loss in the step-up ZVS full-bridge (FB) converter. The forward energy-delivered circuit (FEDC) closely wound in the resonant inductor can alleviate the high ringing ripples incorporating in the primary current and deliver excess energy to the load during step-up conversion The valid duty in ZVS FB converter can then be kept within 0.5-0.7 for step-up five times the input voltage with high efficiency over 88%-92% in a wide load range. A 600 W FEDC step-up converter with 250 V-output/48 V-input is designed and examined to assess the conversion performance and its power efficiency is improved better over 3-5% than before.
Keywords :
bridge circuits; switching convertors; zero voltage switching; conversion performance; forward energy-delivered circuit; loss reduction; power 600 W; resonant inductor; step-up ZVS full-bridge converter; voltage 250 V; voltage 48 V; Circuit topology; Inductors; Power system modeling; Propulsion; RLC circuits; Resonance; Stress; Vehicles; Wounds; Zero voltage switching; Forward energy-delivered circuit; Power efficiency; Step-up ZVS full-bridge converter;
Conference_Titel :
Vehicle Power and Propulsion Conference, 2008. VPPC '08. IEEE
Conference_Location :
Harbin
Print_ISBN :
978-1-4244-1848-0
Electronic_ISBN :
978-1-4244-1849-7
DOI :
10.1109/VPPC.2008.4677780
