无取向电工钢片旋转磁特性测量与损耗特性分析  

Rotational magnetic characteristics measurement and analysis of loss characteristic for non-oriented electrical steel sheets

作　　者：丁杰 李琳[1] 张希蔚 DING Jie;LI Lin;ZHANG Xi-wei(State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources(North China Electric Power University),Beijing 102206,China)

机构地区：[1]新能源电力系统国家重点实验室(华北电力大学),北京102206

出　　处：《电工电能新技术》2022年第7期72-79,共8页Advanced Technology of Electrical Engineering and Energy

基　　金：国家自然科学基金项目(51677064)。

摘　　要：设计低耗、高效变压器和电机离不开对铁心的磁化特性与损耗性能的精准把握。实际运行工况下,铁心中同时存在交变磁场和旋转磁场,且交变磁场和旋转磁场存在着本质的不同,因此探究电工钢片在旋转磁场下的磁化特性和损耗性能就显得至关重要。本文以电机定子作为电工钢片旋转磁特性励磁装置,通过电机的三相励磁绕组产生椭圆形旋转磁场,给出两相输出反馈到三相输入的控制策略,研究不同磁化角度、轴比对损耗特性的影响。并分析了传统正交分解损耗模型在高磁通密度下计算误差较大的原因,提出修正模型,解决了原模型在高磁通密度下存在较大计算误差的问题,为优化设计新一代高效率变压器、电机奠定基础。The design of low-consumption,high-efficiency transformers and motors is inseparable from an accurate knowledge the magnetization characteristics and loss performance of the core.Under actual operating conditions,alternating magnetic fields and rotating magnetic fields exist in the core at the same time,and there are essential differences between alternating magnetic fields and rotating magnetic fields.Therefore,it is very important to explore the magnetization characteristics and loss performance of electrical steel sheets under rotating magnetic fields.In this paper,the motor stator is used as the electric steel sheet rotating magnetic characteristic excitation device,and the elliptical rotating magnetic field is generated through the three-phase excitation winding of the motor.The control strategy of two-phase output feedback to three-phase input is given,and the impact of different magnetization angles and shaft ratios on loss characteristics is studied.The reason for the large calculation error of the traditional orthogonal decomposition loss model under high magnetic density is analyzed,and a modified model is proposed to solve the problem of large calculation error of the original model under high magnetic density.It laid the foundation for the optimal design of a new generation of high-efficiency transformers and motors.

关 键 词：电工钢片 旋转磁特性 损耗特性 

分 类 号：TM275[一般工业技术—材料科学与工程]