部分磁芯的带绕式脉冲变压器的研制

Development of the Spiral Strip Pulse Transformer with Magnetic Core

针对空芯变压器传输效率低的缺点,采取了在带绕式空芯变压器中加入部分磁芯以提高其性能的改进措施。通过比较选择,最终确定用铁基非晶带材料作为磁芯材料,用计算机软件仿真确定只加内磁芯的圆环式结构并根据分析结果制作了初级电感3.1μH、次级电感298.7μH、耦合系数0.87的高功率带绕式脉冲变压器。理论计算和模拟试验得到变压器的变比相一致,部分磁芯变压器是空芯变压器变比的1.2倍,部分磁芯带绕式脉冲变压器的输出电压>635 kV,满足设计和实验要求。

For the air-core pulse transformer has no magnetic material to form the magnetic loop, its coupling coefficient and energy efficiency is lower. In order to improve its properties, a partial magnetic material is inserted in aircore spiral strip transformer. The influence of performance of the transformer is investigated when the part magnetic core is assembled to an air-core spiral strip pulse transformer. On the basis of comparing many kinds magnetic materials, the amorphous iron material is acted as magnetic core of high power spiral strip pulse transformer. According to the previous simulated results, an inner cylindrical magnetic core is used in the air-core spiral strip pulse transformer. A high power strip magnetic-core pulse transformer with primary inductance 3.1μH, second inductance 298.7μH, coupling coefficient 0.87 has been constructed. Its output voltage is more than 635 kV. Compared with the air-core spiral strip pulse transformer of the same dimension, the output voltage ratio is increased by 20 percent. The characteristics of transformer satisfied the requirements of experiment and design.