At Eomys, our NVH R&D engineers regularly post valuable e-NVH overviews on various topics on social networks. For easy access and a fast intake of this useful information, these short presentations are often shown in the form of carousels. The documents are compiled here for a better overview.
Magnetic noise and vibration process involves several equations involving electromagnetics, structural mechanics, and acoustics.Here is a summary of the main formulas useful for engineers involved in the development of electrical
Manatee e-NVH software offers unique post-processing to understand why an electrical machine is noisy. Discover 13 visualization tools including, among others, the Quick Campbell, the modal force matrix and the
The Jaguar i-Pace example is provided with Manatee free trial license. It illustrates a trend often observed nowadays in automotive electric powertrains: higher contribution of circumferential, pulsating r=0 forces applied to stator
Electromagnetic force wavenumber and mechanical structure mode order are sometimes confused when applying eNVH theory to predict noise and vibration due to magnetic forces in electric motors. Discover the difference
Simulation of magnetic noise and vibrations introduces several numerical challenges that are difficult to answer using general-purpose FEA software. Multiphysic coupling, speed and time discretization and numerical noise challenges are
Manatee software is the only solution to assess e-NVH metrics all along the development lifecycle of electrical systems. It helps to avoid common misconceptions met when designing electric drives. Discover for
Explore the differences between Induction machines and Permanent Magnet synchronous machines in terms of electromagnetic noise & vibrations. From the difference of frequency signature to the saturation and load effects
Discover the 4 noise reduction techniques most used by our control engineers (current angle modification, switching frequency shift, change of switching strategy and harmonic current injection). They are all based
Discover the 6 electric motor noise reduction techniques most used by our electrical engineers (change of magnet layout, coil pitching, modification of the rotor slot number, modification of the slot
Discover the 4 electric motor noise reduction techniques most used by our mechanical engineers (Mechanical structure natural frequency shift, change of boundary conditions, damping increase, and control of mechanical tolerances).