摘要
非晶合金和取向硅钢是制作配电变压器铁心常用的两种软磁材料,各有优劣。采用非晶合金-取向硅钢组合铁心结构可以综合两者的优势。该文以非晶合金和取向硅钢铁心并排的组合结构为基础,选取组合铁心的取向硅钢占比和尺寸参数为自由变量,提出一种基于自由参数扫描法的组合铁心结构设计方法。首先,根据非晶合金-取向硅钢组合铁心结构特点,建立组合铁心的等效双非线性磁路模型;其次,采用磁路法迭代求解组合铁心的磁通密度分布,并制定组合铁心的结构设计流程;最后,根据结构设计结果制作了组合铁心的实验模型,采用实验和有限元仿真结合的方法分析了其磁-振动特性,验证了所提设计方法的准确性,并与传统纯非晶合金和纯取向硅钢铁心进行对比分析,阐述了组合铁心的优势。
Amorphous alloy and oriented silicon steel are common soft magnetic materials used in manufacturing distribution transformer iron cores.Amorphous alloy with the advantage of low loss density faces challenges like low saturation flux density and large magnetostriction.Oriented silicon steel has the advantages of high saturation flux density and small magnetostriction,but its loss density is high.The opposite magnetization characteristics of the sematerials make the distribution transformer iron core difficult to simultaneously achieve low loss and low vibration.The combination of amorphous alloy and oriented silicon steel can synthesize the advantages of both materials.Specifically,the composite iron core can take advantage of the high saturation flux density of oriented silicon steel to prevent the supersaturation of amorphous alloy.The core loss is reduced by the low loss density of amorphous alloy,and the vibration of iron cores is reduced by the small magnetostriction of oriented silicon steel.Therefore,it is essential to design the structural parameters of the composite iron core and rationally allocate the proportion of amorphous alloy and oriented silicon steel to reduce the core loss and vibration indistribution transformer iron cores.In the composite iron core,the amorphous alloy part adopts a planar wound iron core structure,and the oriented silicon steel part adopts aplanar stack iron core structure.The exciting coil bypasses both iron cores to realize simultaneous excitation.According to the structure of the composite iron core and the magnetization saturation characteristics of amorphous alloy and oriented silicon steel,an equivalent dual nonlinear magnetic circuit model is established,and the iterative calculation method of flux density distribution is proposed.On this basis,the free parameter scanning method is used to design the structural parameters of the composite iron core.Firstly,the value range of free parameters is set.Secondly,all candidate-free parameter sets are determined by arrangement
作者
陈昊
李琳
Chen Hao;Li Lin(State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University,Beijing 102206 China)
出处
《电工技术学报》
EI
CSCD
北大核心
2024年第10期2925-2936,共12页
Transactions of China Electrotechnical Society
基金
国家重点研发计划课题(2021YFB2401700)
国家自然科学基金(52177005)资助项目。
关键词
非晶合金-取向硅钢组合
铁心自由参数
扫描法
结构设计
双非线性磁路模型
磁-振动特性
Amorphous alloy and oriented silicon steel composite iron
core free parameter
scanning method
structure design
dual nonlinear magnetic circuit model
magnetic-vibration characteristics
