Design and Current Unbalance Control Method for a Center-Tapped LLC Resonant Converter on UHD TV
Tóm tắt
This paper proposes a control algorithm for solving the unbalanced current of the primary side in an LLC converter that uses a center-tap rectifier on the secondary side in ultra-high definition TV applications. The current imbalance in the LLC converter using a center-tap rectifier causes thermal problems, low efficiency, and uncontrollability. The operational principle, primary side control algorithm, and design equation required to solve these problems are presented. The experimental results are presented to verify the efficiency and thermal improvement of proposed control algorithm.
Tài liệu tham khảo
Jo SS (2016) UHD TV market analysis. Inst Inf Commun Technol Promot 60:569–570
Yang B, Lee FC, Zhang AJ, Huang G (2002) LLC resonant converter for front end DC/DC conversion. In: IEEE Proc. APEC02, Boston, pp 1108–1112
Yang B, Chen R, Lee FC (2002) Integranted magnetic for LLC resonant converter. In: IEEE Proc. APEC02, Boston, pp 346–351
Canales F, Barbosa P, Lee FC (2002) A wide input woltage and load output variations fixed-frequency ZVS DC/DC LLC resonant converter for high-power application. In: IEEE Rroc. 7th UAS Annual Meeting of Industry Applications Conference, pp 2306–2313
Jovanovic MM, Farrington R, Lee FC (1990) Comparison of half-bridge off-line, ZCS-QRC and ZVS-MRC. IEEE Trans Aerosp Electron Syst 26(1):326–336
Junming S, Hamada S, Yoshitsugu J, Bin G, Nakaoka M (1998) Zero voltage soft-commutation PWM DC-DC converter with saturable reactor switch-cascaded diode rectifier. IEEE Trans Circuits Syst I Fundam Theory Appl 45(4):348–354
Jung JH, Choi JM, Kwon JG (2009) Design methodology for transformers including integrated and center-tapped structures for LLC resonant converters. J Power Electron 9(2):215–223
Gu Y, Hang L, Chen U, Lu Z, Qian Z, Li J (2005) A simple structure of LLC resonant DC-DC converter for multi-output applications. IEEE Proc APEC05 1485–1490
Moschopoulos G, Fain P (2003) Single-stage ZVS PWM full-bridge converter. IEEE Trans Aerosp Electron Syst 39(4):1122–1133
Prieto R, Cobos JA, Garcia O, Alou P, Uceda J (2001) Using parallel windings in planar magnetic components. Power Electron Specialists Conf 4:2055–2060
Kim JT, Hyeon BC, Cho BH (2009) A new control ethod for resonant current unbalance of center-tapped rectifier in half bridge LLC DC/DC converter. Power Electron Ann Conf 4:390–392
Steigerwald RL (1988) A comparison of Half-bridge resonant converter topologies. IEEE Trans Power Electron 3(2)
Yang B, Lee FC, Zhang AJ, Huang G (2002) LLC resonant converter for front end DC/DC conversion. APEC 2002 2:1108–1112