燕山大学学报2016，Vol.40Issue(5)：419-425,7.
基于预测控制的LLC变换器谐振频率自动跟踪技术
Automatic resonant frequency tracking in LLC resonant converters based on model predictive control
摘要
Abstract
When LLC converters run in some circumstances, the parameters of the resonating components maybe fluctuate, which have effect on voltage gain characteristics of the LLC resonant converter.Meanwhile, it will reduce the efficiency of the LLC resonant converter because the resonating parameters disturbance makes the switching frequency deviate from the designed resonant frequency when the LLC converter running in fixed frequency and duty ratio mode.Considering the resonating parameters fluctuation issue, a LLC resonant frequency auto⁃tracking ( RFAT) method was presented based on the model predictive control ( MPC) in the paper.The proposed RFAT method overcomes the difficulty that the resonant frequency can't be tracked under light load conditions in the traditional method, the proposed RFAT not only effectively resists the output voltage disturbance caused by resonant parame⁃ters fluctuation, but also has the advantages that the implementing algorithm is simple and the hardware interface circuit for data sampling is easily realized.Finally, the feasibility of the proposed FRAT has been verified by the simulation results.关键词
LLC谐振变换器/自动频率追踪/预测控制/定频控制Key words
LLC converter/auto-frequency tracking/predictive control/fixed frequency control分类
信息技术与安全科学引用本文复制引用
阚志忠,张海松,齐飞..基于预测控制的LLC变换器谐振频率自动跟踪技术[J].燕山大学学报,2016,40(5):419-425,7.基金项目
国家自然科学基金资助项目 （）
