电动汽车驱动用内置式永磁同步电机直交轴电感参数计算与实验研究

发布时间：2018-01-23 03:49

本文关键词： 内置式永磁同步电机电感参数有限元冻结磁导率法　出处：《电工技术学报》2014年11期 　论文类型：期刊论文

【摘要】：准确计算电动汽车驱动用内置式永磁同步电机工作点电感参数Ld、Lq,对电机性能的预判以及高精度控制非常关键。驱动用内置式永磁同步电机转子上无自起动笼型条,有限元带载起动计算困难,本文通过确定带额定负载起动时转子初始位置,实现了30k W样机有限元带额定负载起动以及负载饱和磁场计算,为样机负载工作点电感参数准确求解提供计算基础。在永磁同步电机电感计算理论的基础上,分别采用忽略交叉饱和影响的有限元法以及冻结磁导率法计算了样机电感参数。并对30k W样机电感参数采用静态交流实验法进行了实验测量。通过对比,忽略交叉饱和影响的电感参数计算值与静态实测电感值相吻合,采用冻结磁导率法计算的q轴电感值比静态实测q轴电感值减小了20.5%,冻结磁导率法计算的d轴电感值比静态实测d轴电感值增大了38.1%。说明忽略交叉饱和影响有限元法可以准确计算样机的静态不饱和电感参数,但负载时样机磁路交叉饱和效应严重,此时采用考虑交叉饱和影响的冻结磁导率法计算样机电感参数更为准确。
[Abstract]:The working point inductance parameter LdLQ of built-in permanent magnet synchronous motor (PMSM) for electric vehicle drive is calculated accurately. The prediction of motor performance and the high precision control are very important. There is no self-starting cage bar on the rotor of the built-in permanent magnet synchronous motor, so it is difficult to calculate the starting with load by finite element method. In this paper, by determining the initial position of the rotor with rated load starting, the finite element starting with rated load and the calculation of the saturated magnetic field of the 30kW prototype are realized. It provides the basis for the calculation of the inductance parameters of the load working point of the prototype, on the basis of the theory of inductance calculation of the permanent magnet synchronous motor (PMSM). The inductance parameters of the prototype are calculated by the finite element method and the frozen permeability method, respectively, and the static AC experimental method is used to measure the inductance parameters of the 30kW prototype. The calculated values of inductance parameters neglecting cross-saturation are in good agreement with static measured inductance. The Q axis inductance calculated by freezing permeability method is 20.5% less than that calculated by static measurement. The d axis inductance calculated by the frozen permeability method is 38.1 higher than that of the static measured d axis inductance. It shows that the static unsaturated inductance parameters can be accurately calculated by neglecting the cross saturation effect finite element method. However, the cross-saturation effect of the magnetic circuit of the prototype is serious when the load is loaded, so it is more accurate to calculate the inductance parameters of the prototype by using the frozen permeability method considering the cross-saturation effect.
【作者单位】：西北工业大学自动化学院;
【基金】：国家自然科学基金重点资助项目(51177135)
【分类号】：TM341
【正文快照】： (Northwestern Polytechnical University Xi’an 710072 China)1引言电动汽车以电能为动力能源,具有零排放、低噪声和节能等优点,目前受到世界各国的青睐。内置式永磁同步电机(IPMSM)以其高效率、高功率密度、高转矩电流比以及更宽的调速区间等优点在电动汽车驱动电机方面获

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