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NVH & Acoustics of Electric Vehicles

Electric and hybrid electric vehicles drastically reduce CO2 emissions, but bring their own NVH and acoustic challenges. Our integrated solutions optimize the electrical motor noise behavior while leaving the electromagnetic performance unchanged. They integrate electric power sources in the driveline while ensuring smooth operation with minimum NVH impact. In addition, they balance NVH and ride comfort with body weight.

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NVH & Acoustics of Electric Vehicles

Electric and hybrid electric vehicles drastically reduce CO2 emissions, but bring their own NVH and acoustic challenges. Our integrated solutions optimize the electrical motor noise behavior while leaving the electromagnetic performance unchanged. They integrate electric power sources in the driveline while ensuring smooth operation with minimum NVH impact. In addition, they balance NVH and ride comfort with body weight.

Webinar

Address NVH engineering issues of hybrid and electric vehicles

Acoustic comfort in an electric vehicle means tackling a host of new phenomena that weren’t on the radar in the past. Discover how to combine different methodologies to improve the NVH of electric powertrains, illustrated by application examples.

Learn More

Address NVH engineering issues of hybrid and electric vehicles

Acoustic comfort in an electric vehicle means tackling a host of new phenomena that weren’t on the radar in the past. Discover how to combine different methodologies to improve the NVH of electric powertrains, illustrated by application examples.

Learn More

Learn More

Source-transfer-receiver methodology to avoid NVH issues in electric vehicles

Not only is the high-frequency tonal noise of electric vehicles often perceived as annoying, traditional noise sources like wind or tire noise are no longer masked by the dominant internal combustion engine noise. This white paper describes how to address complex NVH problems by breaking each issue into source-transfer-receiver components. Using this methodology helps identify the root causes of late design issues and offers the possibility to implement design changes later on.

Identify the root causes of NVH issues of hybrid and electrical vehicles. Download white paper

Design a warning sound system using acoustic numerical simulation

Electric vehicle warning sounds are a series of sounds designed to alert vulnerable road users such as cyclists, pedestrians and especially the visually impaired, to the presence of electric drive vehicles travelling at low speeds. Siemens PLM Software has contributed to eVader, a European project to address the road safety concerns for pedestrians with the future marketing of electrical vehicles. We are providing solutions to the consortium to simulate and study three basic acoustic elements for the sound system devices: detectability, annoyance and brand sound.

Spatial distribution of the acoustic pressure field at 600 Hz.

On-demand webinar: pass-by noise testing and engineering

Pass-by noise standards are evolving with new certification methods and lower noise emission level limits. In Europe, noise emission levels should be lowered from the current level of 72 dB to a maximum of 70 dB by 2020 and to 68 dB by 2024. Register for this on-demand webinar and see how Simcenter solutions can help meet future noise emission requirements and reduce testing time with innovative pass-by noise engineering methodologies.

Silencing traffic noise with pass-by noise engineering Register for the On-Demand Webinar

Vibro-acoustic analysis to avoid NVH issues in electric vehicles

When designing electric drives, current processes primarily focus on energy efficiency. This might affect acoustic performance, especially when structural resonances coincide. This white paper explains the additional influence of radial forces on the noise signature. By performing vibro-acoustic simulation and analysis, engineers can capture the mechanisms and major contributors of the acoustic signature of an electric motor to accurately predict related NVH behavior early in the design cycle.

Measurement of a SRM motor noise signature. Download white paper

Solution Capabilities

Learn how our customers benefit from this solution.

Vehicle Integration & Balancing

Vehicle Integration & Balancing

Integrate (sub)systems without compromising on performance. Balance and optimize seemingly conflicting requirements for NVH, fuel economy, drivability and comfort to ensure the desired driver experience.

Electric Motor Noise Optimization

Electric Motor Noise Optimization

Optimize electric motor noise behavior and leave electromagnetic performance unchanged by combining electromagnetic simulation and acoustic radiation studies in one process.

Powertrain Testing

Powertrain Testing

Increase the operational efficiency of hybrid and electric engines. Identify orders, determine structural operating conditions, and combine torsional vibration and acoustic measurements.

Road Noise Testing

Road Noise Testing

Analyze road noise using the transfer path analysis (TPA) solution. Decompose road noise into independent components and investigate each individual uncorrelated noise source.

Road Noise Simulation

Road Noise Simulation

Study road noise early in the early development stages and understand the impact of engineering changes on the NVH performance of electric vehicles.

Flow Induced Noise

Flow Induced Noise

Accurately predict the noise generated by unsteady flows. Understand flow-induced noise mechanisms at subsystem and vehicle integration levels.

Auxiliary Noise

Auxiliary Noise

Efficiently optimize the high-frequency tonal noise of auxiliaries. Design, analyze, validate and optimize components while maintaining fuel economy requirements.