Test and Analysis of Electromagnetic Noise of an Electric Motor in a Pure Electric Car

Kang, Qiang; Gu, Perry; Gong, Chao; Zuo, Shuguang

doi:10.4271/2019-01-1492

Cited by 12 publications

(3 citation statements)

References 17 publications

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“…e curve O ij in the figure denotes the j-th order force caused by the i-th pair of meshing gears. Each curve in the figure denotes the amplitude of the vector sum of the order force, which has been converted into A-weighted level in decibel, with the level F L calculated with equation (2). F(n) is the force amplitude corresponding to rotor speed n, and the reference value of the force F 0 � 1N:…”

Section: Bearing Forcesmentioning

confidence: 99%

“…As a result, the physical boundaries between components turn increasingly vague, and the mechanical coupling between the component structures become stronger, which introduces challenges to NVH analysis and control [1]. e generation mechanism of powertrain whine noise is consistent with that of the motor and reducer [2]. However, the coupling effect between the components will significantly affect the characteristics of whine noise.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of Vibration and Noise for the Powertrain System of Electric Vehicles under Speed-Varying Operating Conditions

Deng

et al. 2020

Mathematical Problems in Engineering

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Whine noise from the electric powertrain system of electric vehicles, including electromagnetic noise and gear-meshing noise, significantly affects vehicle comfort and has been getting growing concern. In order to identify and avoid whine problems as early as possible in the powertrain development process, this paper presents a vibration and noise simulation methodology for the electric powertrain system of vehicles under speed-varying operating conditions. The electromagnetic forces on the stator teeth of the motor and the bearing forces on the gearbox for several constant-speed operating conditions are obtained first by electromagnetic field simulation and multi-body dynamic simulation, respectively. Order forces for the speed-varying operating condition are generated by interpolation between the obtained forces, before they are applied on the mechanical model whose natural modes have been calibrated in advance by tested modes. The whine noise radiated from the powertrain is then obtained based on acoustic boundary element analysis. The simulated bearing forces indicate that the overlooking of the motor torque ripple does not result in significant loss in simulation accuracy of electromagnetic noise. The simulation results and tested data show good consistency, with the relative frequency deviation of local peaks being less than 8% and the error of the average sound pressure level (SPL) being mostly below 10 dB (A).

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Section: Bearing Forcesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analysis of Vibration and Noise for the Powertrain System of Electric Vehicles under Speed-Varying Operating Conditions

Deng

et al. 2020

Mathematical Problems in Engineering

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“…In order to find the law of the vibration and noise of the electric vehicle, and to improve the NVH characteristics of electric vehicles, it is necessary to carry out the bench vibration and noise experiment of electric vehicle motor and electric drive system, as well as the vibration and noise test of vehicle driving on the road [1][2][3][4][5][6]. In this paper, a ROEWE electric vehicle produced by SAIC Group is selected as the experimental object, and its parameters was listed in Table 1.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on vibration and noise of the ROEWE electric vehicle

Huang

et al. 2022

ITM Web Conf.

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In order to control the vibration and noise of the ROEWE electric vehicle, it is necessary to carry out the experimental study on the vibration and noise of the electric motor. Firstly, two acoustic sensors are arranged on both sides of the road to measure the pass-by noise of the electric vehicle and to analyze the influence of motor noise on the passing noise. Then, several acoustic sensors are arranged in the vehicle to measure the noise signal in the vehicle, and to analyze the characteristics of interior noise. At the same time, one acoustic sensor and three vibration acceleration sensors are arranged in the vehicle power cabin to measure the vibration signal, and measure the signals of the upper and lower vibration acceleration sensors of the powertrain mount, and analyze the vibration and noise characteristics of the motor and the vibration isolation rate of the powertrain mount. The experimental results show that the vibration of the ROEWE motor has obvious order characteristics, which is mainly composed of order components of order 8, order 16, order 24, order 40, order 48 and order 72 based on the motor output shaft speed and frequency converter switching frequency components concentrating on 10000Hz and 20000Hz. Therefore, to reduce vehicle vibration and noise from the perspective of optimizing motor vibration, the impact of cogging torque on motor vibration should be mainly considered.

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Influence parameters on the perceived magnitude of tonal content of electric vehicle interior sounds

2021

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Test and Analysis of Electromagnetic Noise of an Electric Motor in a Pure Electric Car

Cited by 12 publications

References 17 publications

Analysis of Vibration and Noise for the Powertrain System of Electric Vehicles under Speed-Varying Operating Conditions

Analysis of Vibration and Noise for the Powertrain System of Electric Vehicles under Speed-Varying Operating Conditions

Experimental study on vibration and noise of the ROEWE electric vehicle

Influence parameters on the perceived magnitude of tonal content of electric vehicle interior sounds

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