【摘要】 提出了一种基于导抗变换器的新型三相电流型逆变器,并对其控制策略作了理论分析、仿真和实验研究。本系统利用导抗变换器的电压源?电流源变换特性,将输入直流电压变换为高频正弦电流,经高频变压器隔离及电流等级变换后进行裂相调制,输出为三相正弦电流。相比于传统的电流型逆变器,采用此方法不仅省去了直流侧电抗器,而且采用高频变压器替代了工频变压器,减小了隔离变压器及输出滤波器的体积,有利于装置的小型化和降低成本。仿真和实验结果证明了该方案的可行性及有效性。更多还原

【Abstract】 A three-phase current source inverter is proposed base on the basic principle of immittance converter. Theoretical analyses, simulation research and experiment research for control strategy of the new inverter are developed in detail. To take advantage of characteristics of immittance converter, DC voltage is converted into sine-wave high frequency current and is isolated by high-frequency transformer, then three-phase sine-wave current source is achieved through cycle-converter split-phase modulation. Not only the DC input reactor is reduced but also the power is transmitted by high frequency converter. So that the volume of input filter and isolated transformer is declined, and small volume and low cost are realized. Finally, the feasibility and validity are proved by the simulation and experimental results.更多还原