直线移相变压器应用性能优化设计

Design and optimization for application performance of linear phase-shifting transformer

直线移相变压器具有结构简单、可实现任意角度移相等技术优点,在多重叠加逆变系统中有着广泛的应用。然而,直线移相变压器在边端易形成端部效应,可影响变压器本身的工作性能。首先,文中基于磁路相似化原理,将直线电机与旋转电机的铁芯磁路进行相似化分析;其次,通过改变有效气隙长度,分析输出电流谐波含量和系统效率;最后,通过在边齿部分添加隔磁材料,分析其对变压器端部漏磁通的影响。仿真结果表明,合理选取有效气隙长度、在边齿部分添加隔磁材料可有效削弱边端效应的影响,提高直线移相变压器的应用性能。

The linear phase-shifting transformer has the advantages of simple structure and realize equal shifting at any angle,and it is widely used in multiple superimposed inverter systems.However,it is easy for linear phase-shifting transformer to lead an end effect,which affects the working performance of the transformer itself.First of all,on the basis of the principle of magnetic circuit similarity,it is analyzed the similarity of the iron core magnetic circuit between the linear motor and the rotating motor in this paper.Secondly,it is obtained the value of output current harmonic content and system efficiency with changing the effective air gap length.Finally,it is analyzed the influence on the leakage flux at the end of the transformer by adding a magnetic isolation material to the side teeth.The simulation results show that it effectively weakens the influence of the side effect and improves the application performance of the linear phase-shifting transformer by the reasonable selection of effective air gap length and the addition of magnetic isolation materials.