摘要
为降低基本二次型Buck-Boost变换器输入电感电流应力,提出一种基于开关电感的二次型Buck-Boost变换器。详细分析变换器在L_(1)-CCM、L_(2)-CCM、L_(3)-CCM下的能量传输过程,指出在该模式下电感L_(1)、L_(2)取值是否相等仅对变换器的工作模态有影响;对该模式下的基本关系进行推导,得出变换器电压增益,输入电感电流应力表达式,并分别给出电感L_(1)、L_(2)和L_(3)的连续导通模式(CCM)和断续导通模式(DCM)临界条件与临界电感取值。与基本二次型Buck-Boost相比变换器增益提高了两倍,输入电感电流应力降低了近一倍。最后,通过仿真和实验验证了所提电路的可行性和理论分析的正确性。
In order to reduce the input inductor current stress of the basic quadratic Buck-Boost converter,a quadratic Buck-Boost converter based on switched inductance is proposed.The energy transmission process of the converter under L_(1)-CCM/L_(2)-CCM/L_(3)-CCM is analyzed in detail.It is pointed out that whether the inductance L_(1)and L_(2)are equal in this mode only affects the working mode of the converter;the relational expressions of the converter voltage gain,the input inductor current stress expression are derived.The CCM and DCM critical conditions and critical inductance values of the inductors L_(1),L_(2),and L_(3)are given.Compared with the basic quadratic Buck-Boost converter,the converter voltage gain is increased by two times,and the input inductance current stress is reduced by one time.The feasibility of the proposed circuit and the correctness of the theoretical analysis are verified by simulation and experiment.
作者
刘树林
王斌
朱高中
王航杰
Liu Shulin;Wang Bin;Zhu Gaozhong;Wang Hangjie(School of Electircal and Control Engineering Xi’an University of Science&Technology,Xi’an 710054 China)
出处
《电工技术学报》
EI
CSCD
北大核心
2022年第S01期190-197,共8页
Transactions of China Electrotechnical Society
基金
国家自然科学基金资助项目(51777167,51604217)。
