新型单相电压型准阻抗源AC-AC变换器

摘要

给出一种新型的电压型准阻抗源AC-AC变换电路,分析了电路的基本结构和工作原理.这种电路拓扑由大升压比阻抗网络和单相LC滤波器依序级联构成,大升压比阻抗网络是由储能电感L1和依序级联的2个相同的SLCC型二端口阻抗网络单元串联构成.采用脉冲宽度调制法对电路进行控制从而改变输出电压,利用电感伏秒特性,用MATLAB/Simulink对电路仿真,最后在仿真结果的基础上用TMS320F2812搭建出实验电路,实验结果和仿真结果共同验证了电路结构的可靠性和正确性.%A new type of voltage-fed quasi impedance source AC-AC converter is presented,its circuit structure and working principle are analyzed.This kind of converter is cascade composed of impedance network with high voltage transmission ratio and single phase filter.The impedance network with high voltage transmission ratio is composed of energy storage inductance L1 and SLCC type with two ports impedance network units connected in cascade.The output voltage of the circuit is controlled by pulse width modulation method.Using the volt-second characteristics of the converter,the MATLAB/Simulink is used to perform the simulation for the ac converter circuit.The experimental circuit based on TMS320F2812 is built,both of the experimental results and simulation results verify the reliability and validity of the circuit.