摘要
为提高能馈型直流电子负载的稳态精度和拓宽电压输入范围,提出了一种新型的负载模拟变换器——AB互补型Buck-Boost变换器.新型变换器基于交错互补消除纹波的思想,设计了A型和B型两部分电路,其中A型电路采用传统的四管Buck-Boost拓扑结构,在开关周期内,通过对驱动波形的移相达到电感电流波形呈点对称的目的;B型电路在A型电路的基础上在Buck级和Boost级分别增加了一个图腾柱,通过对4个图腾柱驱动波形的控制,在开关周期内产生与A型电路的电感电流互补的点对称电感电流波形,从而实现了电感纹波的相互抵消.借助Simulink平台搭建了传统Buck-Boost变换器和AB互补型Buck-Boost变换器的仿真模型,在相同的仿真参数下对比两种变换器的电流纹波.结果表明,AB互补型Buck-Boost变换器对电流纹波的抑制效果明显优于传统四管Buck-Boost电路,且相比普通的Boost负载模拟变换器其升压比范围从1~9拓宽到0.12~9.99.
In order to improve the steady-state accuracy of energy-feedback DC electronic load and broaden the voltage input range,a new load analog converter AB complementary Buck-Boost converter was proposed.Based on the idea of interleaving and complementary ripple elimination,the new converter was designed as two parts of A-type and B-type circuits.The A-type circuit adopts the traditional four transistor Buck-Boost topology.In the switching cycle,the inductor current waveform was point symmetrical by phase shifting the driving waveform;On the basis of A-type circuit,B-type circuit adds a totem pole in the buck stage and boost stage respectively.Through the control of the driving waveforms of the four totem poles,the point symmetrical inductance current waveform complementary to the inductance current of type a circuit was generated in the switching cycle,so as to realize the mutual cancellation of inductance ripple.With the help of Simulink platform,the simulation models of traditional Buck-Boost converter and AB complementary Buck-Boost converter were built,and the current ripple of the two converters were compared under the same simulation parameters.The results show that the suppression effect of AB complementary Buck-Boost converter on current ripple is significantly better than that of traditional four switch Buck-Boost circuit.At the same time,compared with ordinary boost load analog converter,its boost ratio range is widened from 1-9 to 0.12-9.99.
作者
梁东飞
苏淑靖
梁文科
邢震震
周广兴
LIANG Dongfei;SU Shujing;LIANG Wenke;XING Zhenzhen;ZHOU Guangxing(State Key Laboratory of Dynamic Measurement Technology, North University of China, Taiyuan 030051, China)
出处
《中北大学学报（自然科学版）》
CAS
2022年第2期173-179,共7页
Journal of North University of China(Natural Science Edition)
