Boost-Buck converter is widely used in LED lighting drivers. In this paper, Boost-Buck main circuit related characteristics are firstly discussed, and then a new Boost-Buck high power efficient double loop control str...Boost-Buck converter is widely used in LED lighting drivers. In this paper, Boost-Buck main circuit related characteristics are firstly discussed, and then a new Boost-Buck high power efficient double loop control strategy is built by adopting error amplifier and integrator control method. It is demonstrated that the new system has many advantages such as high efficiency, fast response, strong anti-interference, good stability after analyses and simulations of its working dynamic characteristics.展开更多
针对锂离子电池在串并联使用过程中出现的电压、容量、内阻等不一致性问题,对传统双层Buck-Boost均衡电路模组内进行改进,解决了传统均衡电路不能均衡相邻单体电池的问题并且提升了均衡速率。在此基础上,设计一种新型锂电池组分层均衡...针对锂离子电池在串并联使用过程中出现的电压、容量、内阻等不一致性问题,对传统双层Buck-Boost均衡电路模组内进行改进,解决了传统均衡电路不能均衡相邻单体电池的问题并且提升了均衡速率。在此基础上,设计一种新型锂电池组分层均衡拓扑电路。均衡策略分别采用模糊控制与传统的均值控制算法,以各电池的荷电状态(state of charge, SOC)作为电池组的均衡控制目标,电池组组内使用改进型的Buck-Boost电路、组间使用双向反激式电路,在Matlab/Simulink中搭建模型并进行仿真分析。对比结果表明,采用模糊控制方法比传统均值控制方法缩短了13.8%的均衡时间,能更快的实现锂电池单体之间的SOC均衡,验证了所提方案的可行性。展开更多
文摘Boost-Buck converter is widely used in LED lighting drivers. In this paper, Boost-Buck main circuit related characteristics are firstly discussed, and then a new Boost-Buck high power efficient double loop control strategy is built by adopting error amplifier and integrator control method. It is demonstrated that the new system has many advantages such as high efficiency, fast response, strong anti-interference, good stability after analyses and simulations of its working dynamic characteristics.
文摘针对锂离子电池在串并联使用过程中出现的电压、容量、内阻等不一致性问题,对传统双层Buck-Boost均衡电路模组内进行改进,解决了传统均衡电路不能均衡相邻单体电池的问题并且提升了均衡速率。在此基础上,设计一种新型锂电池组分层均衡拓扑电路。均衡策略分别采用模糊控制与传统的均值控制算法,以各电池的荷电状态(state of charge, SOC)作为电池组的均衡控制目标,电池组组内使用改进型的Buck-Boost电路、组间使用双向反激式电路,在Matlab/Simulink中搭建模型并进行仿真分析。对比结果表明,采用模糊控制方法比传统均值控制方法缩短了13.8%的均衡时间,能更快的实现锂电池单体之间的SOC均衡,验证了所提方案的可行性。
