Standard e-NVH Training Program
M1-Electrical machines and drives: fundamentals for mechanical / NVH engineers
Short description:
This part of the training covers the fundamentals of electrical machines for mechanical or vibroacoustic engineers who are not familiar with electrical engineering. Key notions such as electrical machines topologies, torque production and Pulse Width Modulation are covered.
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M2-Sound and vibrations: fundamentals for electrical engineers
Short description:
This part the training covers the fundamentals of acoustic noise and vibrations for electrical engineers who are not familiar with mechanical / vibroacoustic engineering. Key notions such as vibrations, structural modes and resonance, sound pressure / power, A-weighting and sound quality are covered. The link with electrical machines is regularly done during the course.
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M3-Generation process of magnetic noise and vibrations
Short description:
This part the training reviews the physical generation process of magnetic noise and vibrations. Key notions such as magnetic force shapes, resonance effects, and air-borne / structure-borne transfer paths are covered.
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M4-Frequency signature of magnetic excitations and impact of manufacturing tolerances
Short description:
This part of the training explains analytically why magnetic force harmonics appear at some specific frequencies and wavenumbers depending on topology and slot/pole combination. General formula of magnetic force harmonics in Permanent Magnet Synchronous Machines and Induction Machines are provided by combining permeance, magnetomotive force, and flux density harmonics step by step.
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M5-Reduction techniques of magnetic noise and vibrations
Short description:
This part of the training reviews some key design rules allowing to control noise & vibrations due to magnetic forces, with their advantages and drawbacks. Noise mitigation techniques cover magnetic, control and structural design parameters, but most of the course deals with electromagnetic design modifications as it is the most efficient way to control magnetic noise and vibrations. Key design parameters for Permanent Magnet Synchronous Machines and Induction Machines are summarized.
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M6-Numerical simulation of magnetic noise and vibrations
Short description:
This part of the training discusses the different ways to include the assessment of magnetic noise and vibrations in a virtual prototyping workflow of e-machines in terms of accuracy, speed and robustness. Different modelling approaches are reviewed, and numerical challenges of CAE-based calculations are discussed. Algorithms to speed up calculations like vibration synthesis and load extrapolation are presented.
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M7-Experimental characterization of magnetic noise and vibrations
Short description:
This part of the training demonstrates how to carry noise and vibration measurements to quickly troubleshoot issues. Some specific tests are recommended on Permanent Magnet Synchronous Machines and Induction Machines. Some experimental spectrogram coming from EV HEV applications are reviewed in detail and interpreted using theory.
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