Temperature characteristics of vehicle motors under extreme variable working conditions

He, Liange; Shi, Wei

doi:10.1007/s43236-020-00191-8

Cited by 6 publications

(3 citation statements)

References 13 publications

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“…Because it is difficult to determine the convection coefficient of the air between the stator and the rotor during the operation of the motor, according to the literature [24], the rotor and the air gap are assumed to be stationary, and the air is assumed to be solid, and the original heat convection is transformed into heat conduction.…”

Section: Heat Transfer Theorymentioning

confidence: 99%

Research on Temperature Rise Characteristics of Vehicle Motors Under Bench Working Condition

Shi

Xia³

et al. 2021

J. Electr. Eng. Technol.

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The specific bench test specified by the product design standard is an important basis for judging whether the vehicle motor meets the requirements. To study the temperature rise characteristics of automotive permanent magnet synchronous motors under bench test conditions. Firstly, the bench condition was taken as the target we need to study, and the finite element method was used to calculate the loss of each part during the bench test condition. Secondly, use this loss as the heat source for temperature field calculation to simulate the temperature field of the motor under bench test conditions. Finally, a bench test platform was built for testing, and the test results and simulation results were compared and analyzed. Studies have shown that in the entire process of changing conditions, the temperature of each component is not the same as the sensitivity to changes in operating conditions. The maximum relative error between simulation and experiment was 9.4%, which verifies the effectiveness of this research method and process, which has certain guiding significance for the design and optimization of vehicle motors. KeywordsVehicle motor • Bench test • Temperature rise characteristics • Finite element method * Xiaohua Xia

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Section: Heat Transfer Theorymentioning

confidence: 99%

Research on Temperature Rise Characteristics of Vehicle Motors Under Bench Working Condition

Shi

Xia³

et al. 2021

J. Electr. Eng. Technol.

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“…Additionally, insulation damage and irreversible demagnetization of PM will cause its structural strength significantly reduced and a dramatic reduction in service life [4,5]. In a highland environment, as the altitude rises, the atmospheric pressure drops and so does the saturation temperature of the cooling water.…”

Section: Introductionmentioning

confidence: 99%

Temperature rise characteristics of permanent magnet synchronous motor considering boiling heat transfer

He,

Feng,

Zhang

et al. 2023

Electr Eng

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The temperature rise characteristics of PMSM (permanent magnet synchronous motor) during operation were studied under the condition of BHT (boiling heat transfer) in cooling water. The subcooling boiling heat transfer model, RPI (Rensselaer polytechnic institute), was used to calculate and improve the computational accuracy of simulation results. The experiments have shown that, when the motor was tested and simulated after preheating, the temperature rise characteristics were similar to test data because the boiling heat transfer phenomenon of the motor was taken into account, with an error of 1.7 %, which was more accurate than the error of 7.5 % without boiling. Therefore, from the results obtained from the experiments, the phenomenon of boiling heat transfer in cooling system has a significant effect on the temperature rise characteristic of the motor, which should be regarded as an important factor. Due to the influence of two-phase flow boiling heat transfer, the temperature rise of the motor in the plain areas is 4-5 ℃ higher than that in the high altitude areas, Consequently, if the motor is operated in high altitude areas, its temperature rise characteristic has better effect compared with plain area. Additionally, when BHT in cooling water is considered, the temperature of the motor drops as the rate of flow increases. In the meantime, the temperature difference between the minimum flow rate and the maximum flow rate is about 1 ℃, which means that the increase of rate of flow can enhance the boiling heat transfer effect. KeywordsPermanent magnet • Synchronous motor • Temperature field • Boiling heat transfer • Two-phase flow • Plateau environment

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“…The permanent magnet synchronous motor has a broad application prospect in the field of electric vehicles because of its small size, high power density, direct drive and high transmission efficiency (Gerada et al, 2013;He and Shi, 2020;Ahn et al, 2017;Xu et al, 2019) but it also has defects. The rotor magnet steel has high compressive strength but low tensile strength.…”

Section: Introductionmentioning

confidence: 99%

Damage evolution of vehicle motor rotor under single working condition based on GTN model

He¹,

Zhou²,

Shi³

et al. 2022

Journal of Theoretical and Applied Mechanics

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To study evolution of the void in the material of a motor rotor under different working conditions from a mesoscopic perspective, damage analysis of the rotor has been carried out based on thermal-mechanical coupling theory. According to the test methods of GB/T 228.1-2010 Part 1 and GB/T 228.2-2015 Part 2, tensile tests were conducted on rotor materials at different temperatures to obtain basic mechanical property parameters, and parameters of the fine-scale damage model at different temperatures were fitted by combining orthogonal tests and a finite element inverse calibration method. Then, the accurate temperature distribution law of the motor rotor was obtained through CFD calculation. Based on the material parameters and temperature data, the void evolution of the rotor material under thermal-mechanical load was studied by using the finite element method. The results show that: under the rated conditions, the stress concentration of the rotor is mainly appeared in the joint with the shaft, the maximum stress was 304.1 MPa, which did not reach the yield limit of the material. No plastic deformation occurred, so the volume fraction of voids inside the rotor material did not change still for the initial pore volume fraction of 2.5 • 10 −3 . In the peak condition, the stress concentration appeared in the rotor plate across the joint of the magnetic bridge and pole shoe with a maximum stress of 354.4 MPa and a small plastic strain of 1.133 • 10 −3 . The pore volume fraction increased to 2.503 • 10 −3 , where the initial pore growth of 2.150 • 10 −6 and the secondary pore nucleation of 2.079 • 10 −12 .

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Temperature characteristics of vehicle motors under extreme variable working conditions

Cited by 6 publications

References 13 publications

Research on Temperature Rise Characteristics of Vehicle Motors Under Bench Working Condition

Research on Temperature Rise Characteristics of Vehicle Motors Under Bench Working Condition

Temperature rise characteristics of permanent magnet synchronous motor considering boiling heat transfer

Damage evolution of vehicle motor rotor under single working condition based on GTN model

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