交流-直流转换器高转换效率控制方法

doi:10.3969/j.issn.1001-2400.2018.06.013

Abstract

Abstract: To improve the transfer efficiency of the AC/DC converter system working in the DCM(Discontinuous Conduction Mode) mode, the power consumption mechanism of the system in different states in one switching period is studied and analyzed, on the basis of which the power stage model is constructed. By MATLAB simulation as well as analysis, the power loss curves of key factors are obtained. On the basis of the analysis, a high efficient constant voltage control method is proposed. The constant voltage control strategy is realized by a 0.35μm/700V/BCD(Bipolar-CMOS-DMOS) process, and simulation and experiment show that the strategy has an excellent load transient response. The transfer efficiency when the power consumption is 5W can reach a level as high as 83%, which exceeds the newest DoE.6 standard, thus realizing the high transfer efficiency.

Key words: discontinuous conduction mode, flyback, power stage model, constant voltage control, efficiency

CLC Number:

TN492

LUO Xiaoqing, CHEN Yan, HU Rong, HE Shangping. High transfer efficiency control method for AC/DC[J].Journal of Xidian University, 2018, 45(6): 75-79.

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High transfer efficiency control method for AC/DC

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