考虑电机磁饱和特性的车用永磁同步电机多参数辨识方法

打开文本图片集

DOI：10.15938/j. emc.2025.08.001

中图分类号：TM341；TM351 文献标志码：A 文章编号：1007-449X（2025）08-0001-09

Multi-parameter identification method of vehicle permanent magnet synchronous motor considering magnetic saturation characteristics of motor

QIU Jianqi1， LIN Junpeng1， WANG Jian²， LIN Zhichen²， WANG Zhiqiang²， YAN Yan1（1.School of Electrical Engineering， Zhejiang University，Hangzhou 310O27，China；2. Advanced Electrical Equipment Innovation Center， Zhejiang University， Hangzhou 3111O7，China）

Abstract：In order to accurately identify the online parameters of permanent magnet synchronous motors for new energy vehicles，a multi-step estimation method using d-axis current injection was proposed to solve the problem of rank-deficiency in multi parameter online identification. In order to improve accuracy of inductance identification，magnetic saturation and cross coupling phenomena were considered in the identification model. In response to the problem of increasing the number of parameters to be identified in the voltage equation of the motor considering magnetic saturation，three sets of measured data were identified using a two-step least squares method by injecting two currents in sequence.This enabled online identification of five parameters，including stator resistance，permanent magnet flux，apparent self nductance and mutual inductance of the AC and DC axes. The feasibility of the method was verified through simulation，and the selection method of the amplitude and duration of the d-axis injection current was analyzed and studied.An experimental platform and conducted multi condition parameter identification experiments were built for diferent loads and operating temperatures，demonstrating feasibility and ffectiveness of the proposed method under different conditions. Under the verification method proposed in his article，the identification error does not exceed ±5% ·

Keywords：permanent magnet sychronous motor; new energy vehicle； online parameter identification;rank-deficient problem; magnetic saturation; cross-coupled

0引言

永磁同步电机（permanent magnet synchronousmotor，PMSM）由于其高功率密度、高效率以及优良的动态性能而广泛应用于新能源汽车领域[1-2]。（剩余11547字）