한국산학기술학회논문지 (Journal of the Korea Academia-Industrial cooperation Society)

  • 제17권10호
  • /
  • Pages.600-608
  • /
  • 2016
  • /
  • 1975-4701(pISSN)
  • /
  • 2288-4688(eISSN)
한국산학기술학회 (The Korea Academia-Industrial cooperation Society)
권호 표지
DOI QR코드

DOI QR Code

저전압 고전류 사양에 적합한 고효율 인터리브 컨버터

A New High-Efficient Interleaved Converter for Low-Voltage and High-Current Power Systems

  • 조인호 (한국철도기술연구원 추진시스템연구팀)
  • Cho, In-Ho (Propulsion System Research Team, Korea Railroad Research Institute)
  • 투고 : 2016.08.23
  • 심사 : 2016.10.07
  • 발행 : 2016.10.31
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

본 논문은 저전압-고전류 사양을 갖는 전력변환 시스템에 적합한 고효율 인터리브드 방식의 위상천이 풀브릿지 컨버터를 제안한다. 제안하는 컨버터는 1차 측에 '3개의 스위치 브릿지와 2개의 트랜스포머', 2차 측에 '2개의 정류단'으로 구성되어 있다. 2개의 트랜스포머는 각각 동일한 크기의 전력변환을 담당하고, 서로가 위상 차이를 두고 에너지를 전달하는 특징을 갖는다. 이를 통해 기존의 인터리브드 방식의 위상천이 풀브릿지 컨버터 수준의 높은 시스템 안정성을 가지게 된다. 제안하는 컨버터는 기존 컨버터의 효율향상 한계로 작용하였던 lagging-leg 스위치의 하드스위칭 특성을 개선하기 위해 새로운 회로 구조와 제어기법을 적용하였다. 이를 통해 제안하는 컨버터는 기존 컨버터에 비해 하드스위칭 조건을 갖는 스위치의 수를 절반으로 줄였으며, 기존 컨버터에 비해 회로 구성에 사용되는 스위치의 수를 줄여 시스템의 복잡도를 개선하는 효과도 얻었다. 제안하는 컨버터의 특성을 확인하기 위해 본 논문에서는 저전압-고전류 특징을 갖는 3kW 서버용 전원장치 스펙을 이용하여 기존 컨버터와 제안하는 컨버터 시스템을 설계하였고, PSIM 시뮬레이션 툴을 활용하여 두 회로의 동작 특징을 비교하였다.

This paper proposes a new high-efficient interleaved phase-shift full-bridge (PSFB) converter for low-voltage and high-current power systems. The proposed converter is composed of three switch-bridges and two transformers in the primary side and two rectifiers in the secondary side. Each transformer handles half of the total power with an interleaved operation, so that the proposed converter has high system reliability, as much as the conventional interleaved PSFB converter. The soft-switching characteristics of the proposed converter are better than those of the conventional converter due to the modulated primary side configuration. The proposed converter represents a single lagging-leg bridge, which has a poor soft switching condition in its operation, while the conventional converter has two lagging-leg bridges in its operation. Therefore, the number of switches having hard-switching conditions is reduced by half in the proposed converter. In addition, the reduced switch counts in the primary side of the proposed converter helps decrease the complexity of the proposed converter compared to that of the conventional converter. The operational principle and analysis are presented in this paper and the characteristics are verified using a PSIM simulation with 3kW server power specification.

키워드

참고문헌

  1. J. P. Bryant, "AC-DC power supply growth variation in China and North America," in Proc. Appl. Power Electron. Conf. Expo., pp. 159-162, 2005. DOI: http://dx.doi.org/10.1109/apec.2005.1452910
  2. L. H. Mweene, C. A. Wright, and M. F. Schlecht, "A 1 kW 500 kHz front-end converter for a distributed power supply system," IEEE Trans. Power Electron., vol. 6, no. 3, pp. 398-407, Jul. 1991. DOI: http://dx.doi.org/10.1109/63.85908
  3. C. Calwell, A. Mansoor, E. Consulting, and C. O. Durango, "AC-DC server power supplies: Making the leap to higher efficiency," in Proc. Appl. Power Electron. Conf. Expo., pp. 155-158, 2005. DOI: http://dx.doi.org/10.1109/apec.2005.1452909
  4. K. G. Brill. (2007). Data center energy efficiency and productivity. presented at the Uptime Institute Symposium 2007[Online]. Available : http://www.energystar.gov/ia/products/downloads/WF_3_Handout_DataCenter_efficiency.pdf
  5. F. C. Lee, P. Barbosa, P. Xu, J. Zhang, B. Yang, and F. Canales, "Topologies and design considerations for distributed power system applications," Proc. IEEE, vol. 89, no. 6, pp. 939-950, Jun. 2001. DOI: http://dx.doi.org/10.1109/5.931492
  6. U. S. Department of Energy and U.S Environmental Protection Agency's National Data Center Energy Efficiency Strategy Workshop. 2008, "Energy Efficiency in Data Centers: Recommendations for Government-Industry Coordination," Available : http://www.energystar.gov/ia/partners/prod_development/downloads/energy_eff_data_centers_rec.pdf
  7. W. Li and X. He, "A family of interleaved DC-DC converters deduced from a basic cell with winding-cross-coupled inductors (WCCIs) for high step-up or step-down conversions," IEEE Trans. Power Electron., vol. 23, no. 4, pp. 1791-1801, Jul. 2008. DOI: http://dx.doi.org/10.1109/TPEL.2008.925204
  8. KH Yi, and GW Moon, " Novel two-phase interleaved LLC series-resonant converter using a phase of the resonant capacitor," IEEE Trans. Ind. Electron. vol. 56, no. 5, pp. 1815-1819, May. 2009. https://doi.org/10.1109/TIE.2008.2011310
  9. B.R. Lin, W.R. Yang, J.J. Chen, and C.L. Huang, "Interleaved LLC series converter with output voltage doubler," in Proc. IEEE IPEC'10, pp. 92-98, 2010. DOI: http://dx.doi.org/10.1109/ipec.2010.5543842
  10. X. Wu, H. Chen, J. Zhang, and F. Peng, " Interleaved Phase-Shift Full-Bridge Converter with Transformer Winding Series-Parallel Autoregulated (SPAR) Current Doubler Rectifier," IEEE Trans. Power Electron., vol.30, no.9, pp. 4864-4873, Sept. 2015. DOI: http://dx.doi.org/10.1109/TPEL.2014.2362941
  11. I.H. Cho, K.M. Cho, J.W. Kim, and G.W. Moon, "A New Phase-Shifted Full-Bridge Converter With Maximum Duty Operation for Server Power System," IEEE Trans. Power Electron., vol. 26, no. 12, pp. 3491-3500, Dec. 2011. DOI: http://dx.doi.org/10.1109/TPEL.2011.2129532
  12. W. Chen, F.C. Lee, M. M. Jovanovic, and J. A. Sabate, "A comparative study of a class of full bridge zero-voltage-switched PWM converters," in Proc. IEEE APEC'95, pp. 893-899, 1995. DOI: http://dx.doi.org/10.1109/apec.1995.469046
  13. R. Redl, N.O. Sokal, and L. Balogh, "A novel soft-switching full-bridge DC/DC converter: Analysis, design considerations, and experimental results at 1.5 kW, 100 kHz," IEEE Trans. Power Electron., Vol. 6, pp. 408-418. July 1991. DOI: http://dx.doi.org/10.1109/63.85909