Journal of Jilin University(Engineering and Technology Edition) ›› 2025, Vol. 55 ›› Issue (6): 1862-1872.doi: 10.13229/j.cnki.jdxbgxb.20230968

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Multi⁃physics simulation method of vehicle motor under varying working conditions based on multi⁃software combination

Mei-xia JIA(),Jian-jun HU(),Feng XIAO   

  1. College of Mechanical and Vehicle Engineering，Chongqing University，Chongqing 400044，China
  • Received:2023-09-11 Online:2025-06-01 Published:2025-07-23
  • Contact: Jian-jun HU E-mail:jiameixia23@163.com;hujianjun@cqu.edu.cn

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Abstract:

A multi software based multi physics simulation method for automotive motors under variable operating conditions was proposed. By combining finite element and lumped parameter methods， both finite element and variable operating condition simulations can be carried out simultaneously， making the simulation process closer to the actual working process. On the basis of analyzing the temperature field and electromagnetic field of the motor， a mathematical model coupling multiple physical fields was decomposed. A multi software joint simulation model was established using Maxwell Simplorer Simulink， and the finite element model was reduced using the equivalent current extraction method， greatly improving the computational speed of the model. The joint simulation model is a fully coupled model that can achieve data exchange and transmission between different software models， thereby realizing transient simulation of the motor under different operating conditions. By using the joint simulation method， synchronous simulations of multiple physical fields can be obtained simultaneously， enabling real-time data exchange of the joint simulation model and avoiding errors caused by asynchronous simulation of non fully coupled models. Finally， the output torque of the motor was verified through experiments， and the torque error between the model and the experiment was less than 3%， proving the effectiveness and accuracy of the multi field coupled multi software joint simulation method.

Key words: vehicle engineering, multi-physics coupling, equivalent current extraction method, joint simulation method

CLC Number: 

  • TM341

Table 1

Motor parameters"

参数值参数值
极对数4母线电压/V380
相数3永磁体材料N35UH_100
槽数42铁芯材料B35AV1900
额定转速/（r·min-1）3 000绕组材料铜
峰值功率/kW70峰值扭矩/（N·m）201
额定功率/kW25额定扭矩/（N·m）90

Fig.1

Iron consumption of silicon steel"

Fig.2

Distribution of magnetic induction intensity and vector magnetic potential"

Fig.3

Distribution cloud of motor iron consumption at different temperatures"

Table 2

Maximum value of electromagnetic parameters at different temperatures"

参数60 ℃95 ℃130 ℃
磁密/T2.631 02.625 12.618 6
磁矢位/（Wb·m-1）0.031 60.031 50.031 2
铁耗率/107 （Wb·m-1）1.561.571.58

Fig.4

Maxwell-Simplorer-Simulink joint model"

Fig.5

Comparison of torque and speed"

Fig.6

Transient data of motor of transient process"

Fig.7

Copper loss under design conditions"

Fig.8

Iron loss under design conditions"

Fig.9

Motor electromagnetic field distribution at 2500 r/min"

Fig.10

Motor electromagnetic field distribution at 4 000 r/min"

Fig.11

Motor loss distribution at 2 500 r/min"

Fig.12

Motor loss distribution at 4 000 r/min"

Fig.13

Test bench installation"

Fig.14

Comparison of torque changes with temperature"

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