CAJ | 학술논문

针对传统三相不控整流器接容性负载时网侧电流严重畸变,提出了一种直流侧采用C滤波的改进型低谐波输入三相整流器,该整流器由交流侧电感、三相不控整流桥、整流桥上桥臂并联电容以及直流侧滤波电容组成.分析了该整流器的工作原理,和原有的直流侧采用LC滤波的整流器进行了比较,并针对这两种整流器分别给出了其参数设计.实验结果表明通过增加交流侧辅助电感和电容的办法,可有效改善网侧电流波形;且直流侧采用C滤波的电路结构更加简洁、辅助元件取值较低,因而具有较优的综合性能,提高了该类型整流器的应用潜力.
침대전통삼상불공정류기접용성부재시망측전류엄중기변,제출료일충직류측채용C려파적개진형저해파수입삼상정류기,해정류기유교류측전감、삼상불공정류교、정류교상교비병련전용이급직류측려파전용조성.분석료해정류기적공작원리,화원유적직류측채용LC려파적정류기진행료비교,병침대저량충정류기분별급출료기삼수설계.실험결과표명통과증가교류측보조전감화전용적판법,가유효개선망측전류파형;차직류측채용C려파적전로결구경가간길、보조원건취치교저,인이구유교우적종합성능,제고료해류형정류기적응용잠력.
In order to improve the distorted current of the conventional uncontrolled rectifier with the capacitive load, an improved low harmonic input three-phase rectifier with DC-side C filter is proposed in this paper. This rectifier was composed of input inductors, three-phase diode rectifier, commutation diodes parallel connected with the upper diode and DC-side C filter. In this paper, operation principle analysis of this novel rectifier was deeply analyzed. Comparison between the improved rectifier and the exiting rectifier with DC-side LC filter was given as well. Moreover, a practical parameter optimal design methods of these two rectifiers were proposed. Experimental results show that input currents will be improved by adding auxiliary inductors and capacitors to the AC side. Better comprehensive performance can be achieved by using the proposed rectifier with DC-side C filter for its simplicity configuration and smaller auxiliary components.