Mechanical and Aerodynamic Noise Prediction for Electric Vehicle Traction Motor and Its Validation

Gurav, Rahul; Udawant, Kishor; Rajamanickam, Ramkumar; Karanth, Nagesh Voderahobli; Marathe, S R

doi:10.4271/2017-26-0270

Cited by 8 publications

(3 citation statements)

References 7 publications

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“…Electromagnetic noise is a result of the interaction between electromagnetic flux waves and the resonance frequencies of the stator core. Aerodynamic noise is attributed to the sound generated by the passage of air around/through the motor [27].…”

Section: Noise From Electromagnetic Forcementioning

confidence: 99%

Acoustic Signature Analysis and Sound Source Localization for a Three-Phase AC Induction Motor

et al. 2021

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As part of the recent electrification of the transportation industry, internal combustion engines are being coupled with or replaced by electric motors. This movement towards an electrified drivetrain poses new noise, vibration, and harshness (NVH) challenges related to electric motors. In this paper, the acoustic signature of an electric motor was analyzed to obtain a better understanding of the sound generated by these motors. This work provides an insight into an acoustic measurement technique that can be used to identify certain frequency bands that significantly contribute to the perceived sound. In the first part, the structural response of the motor was correlated with its acoustic spectra. Furthermore, data from acoustic and structural measurements were used to analyze the order content of the signal and identify critical contributors to the overall perceived sound. The differences between data captured by microphones in different positions around the motor helped to localize components of the overall sound. The results provide some discussion about techniques to decrease the overall sound. The technique described in this paper can be extended to fan-cooled motors that are used in vehicles such as golf carts or as auxiliary motors in electric/hybrid vehicles, as well as across a wide range of industrial applications.

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Section: Noise From Electromagnetic Forcementioning

confidence: 99%

Acoustic Signature Analysis and Sound Source Localization for a Three-Phase AC Induction Motor

et al. 2021

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“…Blair [6] explored the benefit of viscous fan clutch with continuous variable speed for engine cooling system resulting improved overall fuel efficiency and reducing fan noise of the engine. Noise comparison studied through experimental models carried out by Werne et al, Gurav et al, and Mugridge [7][8][9][10] reveal that frequent shift from low to high speed creates higher frequency, compared to smooth proportional increase in fan speed. The current definition of fan in cooling system utilizes portion of engine power to run, thus, influencing the fuel consumption and contributing to NVH level of vehicle, which is critical to passengers' comfort.…”

Section: Introductionmentioning

confidence: 99%

Use of electronic viscous drive to optimize fan duty cycle

Ramdas

Dey

2022

Eng. Res. Express

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The Electronic Viscous Fan Drive Clutch is one of the key components of cooling system in automotive sectors. It is more efficient than the current traditional bimetal operated Mechanical Viscous Fan Drive Clutch in terms of fan power consumption. The comparative change in fan power with both fan drives is studied and it is observed that with electronic fan clutch 86% reduction in fan power is achieved. In the current study an attempt is made to demonstrate the improvement in the cooling system in terms of ambient temperature of air and the coolant temperature. This is achieved through the complete driving cycles by maintaining unvarying temperature. Standard rise over ambient vehicle test with support of Vector CANapeis utilised for testing and data recording. With use of electronic viscous fan drive there is direct proportional relation between coolant temperature and fan rpm. It alsoindicates that the system level temperaturesare optimized to achieve higher efficiency in terms of thermal and fuel economy.

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“…The noise generated during its operation has a high impact on the indoor and outdoor sound environments. Noise generated by traction motors includes electromagnetic noise, mechanical noise, and pneumatic noise [6]. Among them is the high-speed, self-fanning, air-cooled motor.…”

Section: Introductionmentioning

confidence: 99%

Noise Reduction Design Method and Validation of Unequal-Pitch Blade Fan for Traction Motor

Li,

Yang,

et al. 2023

Processes

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The traction motor of trains is an essential component that generates the traction force, but it has a significant influence on the indoor and outdoor acoustic environment during the running condition. To enhance passenger comfort and bolster the environmental performance of trains, regulatory standards and specifications governing train noise have imposed elevated criteria on both tonal noise and the overall A-weighted sound pressure level emanating from traction motors. This paper proposes an aerodynamic noise optimization design method based on aerodynamic interference. The objective function of the optimization is defined as the blade-passing frequency (BPF) noise and the A-weighted overall sound pressure level of the traction motor fan. The simulated annealing algorithm is used to optimize the circumferential distribution of the blades. The optimized unevenly spaced blade configuration of the fan effectively reduces the BPF sound pressure level amplitude by 4.6 dBA and the overall A-weighted sound pressure level by 1.2 dBA. The calculation results agree well with the experimental results. The study reveals that unevenly spaced blades contribute to better noise reduction at lower rotational speeds. However, the effect diminishes at higher speeds. The relationship between noise reduction and blade count is nonlinear, suggesting an optimal count for specific speeds.

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Mechanical and Aerodynamic Noise Prediction for Electric Vehicle Traction Motor and Its Validation

Cited by 8 publications

References 7 publications

Acoustic Signature Analysis and Sound Source Localization for a Three-Phase AC Induction Motor

Acoustic Signature Analysis and Sound Source Localization for a Three-Phase AC Induction Motor

Use of electronic viscous drive to optimize fan duty cycle

Noise Reduction Design Method and Validation of Unequal-Pitch Blade Fan for Traction Motor

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