论文部分内容阅读
针对传统单相电压源 AC-DC-AC 变换器存在电压传输比低、死区控制复杂的不足，提出了一种具有Transformer-based Z-source(Trans-Z 源)的新型单相交流变换器。通过研究该变换器的拓扑结构和工作原理，分析了其稳态升压特性，并推导了变换器的升压公式；建立了变换器的小信号模型，分析了电路参数对系统性能的影响，进一步研究了耦合电感匝数比与逆变桥直通占空比对输出电压的影响。通过系统仿真和搭建200 V/50 Hz 样机模型来验证变换器的性能。仿真与实验结果表明了所提变换器的可行性。“,”1Due to drawbacks of low voltage transfer ratio and dead time control complexity of traditional single-phase AC-DC-AC converter, a novel single-phase AC-DC-AC converter transformer-based Z-source is presented. Based on analysis of topology, working principle and steady-state characteristics of the converter, boost formula is derived. The paper established small signal model, studied effect of circuit parameters on system performance, further analyzed effect of coupled inductor turn ratio and shoot-through duty cycle of inverter-bridge on output voltage. Performance of the proposed converter is verified with simulation and a laboratory prototype of 200V/50Hz. Results of simulation and experiment show that the converter is feasible.