永磁同步电机交直轴增量电感计算与测量研究  

Research on calculation and measurement of d-axis and q-axis incremental inductance of permanent magnet synchronous motor

作　　者：李巍[1] 王浩淞 陈伟 LI Wei;WANG Hao-song;CHEN Wei(College of Electronic and Information Engineering,Tongji University,Shanghai 201804,China;Shanghai STEP Electric Corporation,Shanghai 201801,China)

机构地区：[1]同济大学电子与信息工程学院,上海201804 [2]上海新时达电气股份有限公司,上海201801

出　　处：《电机与控制学报》2022年第12期19-27,共9页Electric Machines and Control

基　　金：国家自然科学基金(51777139)。

摘　　要：电感参数是电机设计及电机控制系统的重要参数,电机的各种性能指标与电感参数有着密不可分的关系。针对永磁同步电机磁路结构复杂、铁磁材料非线性导致电感参数为变量的问题,本文以一台内嵌式永磁同步电机为对象进行相关研究,阐述交直轴增量电感计算和测量的方法及结果对比验证。首先采用有限元法对不同负载下的交直轴增量电感进行计算,建立电感关于电流的三维数据表格,剖析交直轴增量电感的变化趋势和交叉饱和特性的影响。其次为了探讨增量电感和视在电感二者之间的关系,对一台未充磁电机交直轴的两种电感进行相应的计算和对比分析。最后采用多种不同的实验方法对上述电机的交直轴电感进行测量,并将实验测量结果与有限元法的计算结果进行对比,证明了理论分析的正确性。The inductance is a very important parameter in motor design and motor control system, which relates to many kinds of performance metrics. For the inductance is a variable due to the complex magnetic circuit structure and the nonlinearity of ferromagnetic materials, this paper takes an interior permanent magnet synchronous motor(IPMSM) as the research target. Firstly, the finite element method(FEM) was used to calculate the dq-axis incremental inductance under different load conditions, with the trend of dq-axis inductance and the effect of cross saturation elaborated by constructing inductance look-up-table(LUT) varying with current. Secondly, in order to dissect the relationship between apparent inductance and incremental inductance, corresponding calculation and contrastive analysis were carried out to a demagnetized motor. Finally, several different experimental methods were used to measure the dq-axis inductance of the motors. The results of experimental measurement and finite element calculation are compared to verify the correctness of theoretical analysis.

关 键 词：永磁同步电机 增量电感 视在电感 有限元法 冻结磁导率法 离线辨识 

分 类 号：TM351[电气工程—电机]