变压器铁心谐波磁通抑制技术 及其在工业整流中的应用

提出了一种基于感应滤波的变压器铁心谐波磁通抑制技术，以解决现有大功率整流系统谐波污染严重及变压器振动与噪音大等问题.对新型整流变压器及滤波装置进行了分析与设计，根据新型谐波屏蔽变压器的谐波抑制原理，从变压器铁心的谐波磁通抑制方面揭示了感应滤波技术在谐波抑制和降低变压器振动与噪音的本质及特点，提出一种通过判别谐波电压电流相位差是否趋近于零以实现滤波装置全调谐的方法，构建了一套新型工业直流供电系统.最后，通过对实际新型工业直流供电系统进行测量，结果表明了本文提出的新型直流供电系统具有良好的谐波抑制效果和大大降低变压器振动与噪音等优点.

Harmonic Magnetic Flux Suppression Technology of Transformer Core and Its Application in the Industrial Rectifier System

In order to solve the serious harmonic contamination and transformers'' vibration and noises of the existing high-power industrial rectifier system, harmonic magnetic flux suppression technology of transformer core based on inductive filtering method was proposed. Firstly, the new rectifier transformer and filtering device were analyzed and designed. Based on the harmonic suppressing principle of the new converter transformer and the view of harmonic magnetic flux suppression in transformer core, the inherent distinction and characteristics of the inductive filtering method on the harmonic suppression and the reduction of the transformers'' vibration and noises were revealed. Then, this paper achieves the normal tuning of the filtering devices by measuring the phase differences between harmonic voltages and currents. A new DC power supply system was also established. In addition, the practical test results of the new DC power system have shown that the harmonics generated by rectifiers and loads are well suppressed and the vibration and noises of the transformers are greatly reduced.