摘要
提出了一种基于AC-Link技术的新型充电电源,在各个工作过程都能实现零电流开关。采用电荷量分配的控制策略,分析电网电压对换流相位的影响。对输入线电流、线电流谐波和开关电流进行了仿真,最后进行了实验验证。实验结果表明:电源平均充电速率为62.5 kJ/s,功率密度为0.6 W/cm^3;电流波形能够很好地跟随电压波形,实现高的功率因数,每相总的电压谐波含量小于2%,总电流谐波含量小于10%;矩阵开关工作在软开关条件且实现软切换过程时,能够实现高的效率;在阻性条件下,效率为93%。
A new charging power supply based on the AC - Link technology is proposed to realize ZCS in every process. Using the strategy of charge distribution, the influence of grid voltage on commutation phase is analyzed. The input line current, current harmonics and switching current are simulated, and the experimental verification is completed. The experimental results show that the average charging rate is 62.5 kJ/s, a higher power density of 0.60 W/ cm3 is achieved, and the power factor is 0.99 with the input line current waveforms following the input phase voltage. Total voltage harmonic is below 2%, and total current harmonic is below 10%. High efficiency can be achieved in case of soft switch and natural commution utilized, which is 93% with resistive load.
出处
《电源学报》
CSCD
2017年第4期125-130,共6页
Journal of Power Supply
基金
中央高校基本科研业务费专项资金资助项目(2682014ZT20
2682014CX090)~~
