2019 05 22 eomys engineering 1 en slideshare · 2019_05_22_eomys engineering_1_en_slideshare...

© 2019 EOMYS ENGINEERING – www.eomys.com

EOMYS ENGINEERING Noise, Vibration, Harshness (NVH) expertise of electrical systems

LE BESNERAIS Jean

[email protected]

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© 2019 EOMYS ENGINEERING – www.eomys.com 2

PRESENTATION

*"Jeune Entreprise Innovante": the French government recognises that EOMYS runs significant R&D activities

• Young Innovative Company* created in may 2013 in Lille, North of France (1 hour from Paris)

• Activities : engineering consultancy specialized in NVH of electrical systems

• 9 R&D Engineers (electrical engineering, vibro-acoustics, scientific computing)

• 90% of export turnover in transportation (automotive, railway, marine, aeronautics), energy (wind, hydro), home & medical appliances, industry

• More than 80 customers worldwide and up to 40 dB reduction


• Troubleshooting NVH issues in electrical systems

EOMYS can work both at design stage & after manufacturing of electric machines & passive components

Technical trainings on vibroacoustics of electrical systems

Design optimization of electrical systems

CONSULTING SERVICES


Troubleshooting NVH issues in electrical systems

• Electrical and vibroacoustic simulations and/or testing

• Advanced post-processings

• Identification of the root cause of noise and vibration

• Proposal of mechanical or electrical engineering solutions (e.g. pole shaping, winding design, slot/pole combination, skewing)

• Validation by simulations and/or tests

Example: reduction of 40 dB of a traction PMSM by winding redesign


System(ex: electric vehicle)

Sub-system (ex: powertrain)

Subsub-system (ex: e-motor)

Subsub-system (ex: gearbox)

Air-borne+Structure-borne physical Sound Power Level

PerceivedSound Level

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Noise control actions adapted at each system level, from electromagnetics to sound quality:

- 0: excitations (EM)- 1: vibration power level transmitted at interface points

and Equivalent Radiated Power (EM+SM)- 2: intrinsic sound power level (EM+SM+AC)- 3: interactions at same component level (EM+SM+AC)- 4: system interfaces and overall structure-borne noise (EM+SM+AC)- 5: psychoacoustics / sound quality (EM+SM+AC+SQ)

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Troubleshooting NVH issues in electrical systems


Design optimization of electrical machines

• Electromagnetics, heat transfer and vibro-acoustics simulation under MANATEE® software

• Use of analytical, semi-analytical and numerical techniques

• Coupling with adapted multi-objective constrained optimization tools

• Structure-borne noise, air-borne noise, rotor dynamics

• Software development under Matlab & Python

Example: optimal design of wind turbine generators includingtechno-economical, heat transfer and acoustic models


Technical trainings

• From 2 to 5-day technical trainings on magnetic noise & vibrations (face to face or by teleconference) – 600 slides

A1. Electrical machines – basic working principles for NVH engineersA2. Sound & vibrations – fundamentals for electrical engineersB. Magnetic noise and vibration generation processC. Characterization of magnetic force harmonicsD. Calculation of magnetic noise and vibrationsE. Magnetic noise and vibration reduction techniquesF. Experimental characterization of magnetic noiseG. Application with MANATEE® e-NVH simulation softwareH. Application with OROS® NVH acquisition software

• « e-NVH Academy » open resources available at https://eomys.com/e-NVH


SOFTWARE SERVICES - MANATEE

• Electromagnetic and vibro-acoustic simulation software of electrical machines

• Only software specialized on e-NVH both in basic design (semi analytical models) or detaileddesign phase (optimized coupling with electromagnetic FEA and structural FEA)

• Fault simulation (e.g. eccentricity, uneven airgap, demagnetization, pole displacement)

• More than 100 post processings to quickly find NVH root cause and implement noise mitigation actions

• Up to 40 dB reduction obtained on industrial cases



Third-party sound quality tools

Third-party electromagnetic design tools

Third-party structural design tools

Third-party acoustic design tools

Third-party gearbox NVH design tools

Standalone e-motor NVH solution (electromagnetics

+vibro-acoustics)

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Third-party NVH data acquisition tools

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v1.07 coupling

v1.08 coupling



• MANATEE is the only software extensively validated on real variable-speed cases

See more at www.manatee-software.com

IPMSM

WRSM

SCIM

IPMSM

SPMSM


SOFTWARE SERVICES - PYLEECAN

• First open-source software for the electromagnetic simulation of electricalmachines under Python (coupling with Femm)

• Commercial support, code/GUI development and training

• See www.pyleecan.org for more information

© 2019 EOMYS ENGINEERING – www.eomys.com

• Vibroacoustic analysis of more than 80 electric powertrains

• Wide range of electrotechnical solutions (e.g. skewing, current injection, notches, pole shaping)

• Wide range of topologies: induction & PM machines, inner/outer rotor, 5 rpm to 150 krpm, 1 cm to 10 m diameter, 100 W to 40 MW

• Extended NVH measurements (OMA, EMA, ODS, TPA) focusing on magnetic noise & vibrations, including telemetry

• Psychoacoustics / sound quality of electric powertrains

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EXPERIENCE


Combined semi-anechoic chamber & electrical lab

NVH hardware• 5 microphones (Piezotronics)• 12 miniature accelerometers (B&K)• 4 tri-axial accelerometers (B&K)• 6 mono axis accelerometers (B&K)• Impact hammer (DJB) and electrodynamic shakers (LDS)• Laser vibrometer (Ometron)• Tachometer (B&K)

NVH TEST FACILITIES

NVH software• OROS OR35 10+2 channel NVH acquisition system• Dewesoft Sirius 16 channel DAQ • combined measurement of temperature, voltage, current, vibration, noise

NVH post-processings• Sound Power Level • Order tracking and spatiograms• Operational Modal Analysis, Experimental Modal Analysis (OMA –EMA)• Operational Deflection Shape (ODS)• Transfer Path Analysis (ATPA – OTPA)• Sound Quality metrics (loudness, tonality, sharpness, roughness)


R&D INTERNAL RESEARCH PROGRAMME

• Internal R&D program on electromagnetically-excited noise & vibrations

• Collaborations with national (e.g. L2EP, LSEE) and international labs

• 2 PhD students

• More than 35 papers on e-NVH (IEEE Trans Mag, IEEE En Conv, IEEE Ind Appl, IET,

COMPEL) and 1 patent

• Publication preprints and posters can be accessed at

https://eomys.com/recherche/publications


R&D INTERNAL RESEARCH PROGRAMME

Analysis and reduction of electromagnetically-excited NVH

current injection & influence of control development of fast hybrid simulation methods (FEM / semi-analytic) 3D electro-vibro-acoustic simulation of rotating machines (asymmetries, skewing) psychoacoustics of electric powertrains advanced post processings of electrical machines NVH (e.g. spatiograms) new characterization methods of electrical machines structural behaviour


PARTNERSHIPS

• Member of industrical clusters

- Motors and Electrical Devices for Energy Efficiency MEDEE

- Mobility and Automotive R&D competitiveness cluster MOVEO

- Innovative Transport cluster ITRANS

• Member of SCO Expert Pool, international consultants in electrical machines

• Financial partners:

2019 05 22 eomys engineering 1 en slideshare · 2019_05_22_eomys engineering_1_en_slideshare...

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