Development of 6kW ZVS Boost Converter by 4-Parallel Operation

4-병렬 제어 기법을 적용한 6kW 영전압 스위칭 승압형 컨버터 개발

  • 노민식 (신라대 공대 전자공학과)
  • Published : 2009.01.01


This paper presents development of 6kw ZVS(Zero Voltage Switching) boost converter by 4-parallel operation. To realize a high capacity converter with 6 kw, 4-parallel operation of 1.5kW unit module is proposed in this paper. To meet high ratio input to output voltage, isolated type booster converter is designed. To achieve ZVS operation of 4-switches of full bridge and protect a voltage overshoot caused by switch turn-off, simple active-clamp circuit is applied to the primary side. For parallel operation of 4-modules, master-slave control method is proposed to achieve input current sharing of 4-unit converter modules accurately. For performance tests, simulation is carried out. Also, load and experimental tests of the developed booster converter, 230Vdc/6kW, are carried out under various conditions. For field tests, the developed converter is applied for boosting a battery power to high DC_link voltage for a VSI inverter which starts a micro-turbine(MT) installed in vehicle and it's performance is verified through high speed motoring a MT up to tens of thousands of rpm.


  1. R. Watson, and F. C. Lee, 'A soft-switched full-bridge boost converter employing an active-clamp circuit,' IEEE PESC Rec, pp. 1948-1954, 1996
  2. J. G. Cho, J. W. Baek, D. W. Yoo, D. I. Song, and G. H. Rim, 'Zero voltage transition isolated PWM boost converter for single stage power factor correction,' IEEE APEC Rec., pp. 471-476, 1997
  3. Lizhi Zhu, Kunrong Wang, Fred C. Lee, and Jih-Sheng Lai,' New Start-up Schemes for Isolated Full-Bridge Boost Converters', 2000,IEEE
  4. L. Zhu, K. Wang, F.C. Lee, and J. Lai, 'Design considerations of start-up process for active-clamp isolated full-bridge boost converter,' Proc. of IEEE APEC 2000, pp. 309-313
  5. K. Wang, Fred C. Lee and Json Lai,'Operation principles of bi-directional full-bridge DC/DC converter with unified soft-switching scheme and soft starting capability',2000, IEEE PESC
  6. K. Wang, L. Zhi, D. Qu, H. Odendaal, J. Lai, and F.C. Lee, 'Design, implementation, and experimental results of bi-directional full-bridge dc/dc converter with unified soft-switching scheme and soft-starting capability,' pp. 1058-1063, IEEE PESC 2000
  7. K. Wang, C.Y. Lin, L. Zhu, D. Qu, F.C. Lee, and J. Lai, 'Topology trade-off and experimental results of bi-directional dc/dc converters for fuel-cell electric vehicle power management,' Proc. of IEEE Workshop on Power Electronics in Transportation 1998, pp. 47-52