Noise, Vibration & Harshness – NVH for Electric Motors
FEA & CFD Based Simulation Design Analysis Virtual prototyping MultiObjective Optimization
FEA based Simulation Design for Electromagnetic multiphysics environments has a significant benefits for noise, vibration and harshness (NVH) analysis of electrical machines and transformers. NVH is an important analysis required by manufacturers of motors used in hybrid/electric vehicles, appliances, commercial transformers and other applications where quiet operation is an essential design parameter. Two-way transient magnetostriction coupling enables the magnetostrictive forces to be added to the magnetic forces and coupled to a mechanical design to predict acoustic noise.
Results from Electromagnetics solver obtained from the transient electromagnetic simulation to calculate the forces which are directly mapped to Mechanical solvers through special co-simulation algorithms for harmonic analysis. Optionally, an acoustic analysis can be performed to study noise.
The forces from Electromagnetics solver are mapped as force vectors within the volume of the individual mesh elements, allowing a detailed and accurate form of mapping. This is because element-based mapping allows forces to be calculated for individual mesh elements, increasing the accuracy.
To optimize for NVH, our engineers use the forces from the EM analysis to perform advanced vibro-acoustic simulations. The forces are mapped to evaluate the structural dynamics response of the motor.
Modal and harmonic stress coupling responses are important for simulating the NVH of an electric motor and for proper vibro-acoustic design of electric vehicles (EVs). The harmonic analyses generate absolute magnitudes of vibrations and waterfall diagrams to get a complete picture of the motor’s acoustic profile.
Electromagnetic Multiphysics
With advanced FEA tools we investigate the performance of electromechanical components, energy conversion, design and siting of antennas, electromagnetic compatibility (EMC) and electromagnetic interference (EMI). A range of dedicated solvers (time and frequency based, linear and nonlinear, finite and boundary element) offers a transformative CAE process, with simulations ranging from a fast, initial analysis to inherent realism for final verification.
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Brushless Permanent Magnet machine (BLPM), Induction (or Asynchronous) machine (IM), Wound Synchronous machine (SM), Switched Reluctance machine (SRM), Synchronous Reluctance machine, Permanent Magnet External Rotor.
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Coupled Electromagnetic Solver with Finite Element & CFD Based Multiphysics simulation
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RF, Microwave, Advanced Driver Assistance Systems (ADAS), Multipaction, and Electromagnetic Interference and Compatibility (EMI/EMC)
Ansys HFSS is a 3D electromagnetic (EM) simulation software for designing and simulating high-frequency electronic products such as antennas, antenna arrays, RF or microwave components, high-speed interconnects, filters, connectors, IC packages and printed circuit boards. Engineers worldwide use Ansys HFSS software to design high-frequency, high-speed electronics found in communications systems, advanced driver assistance systems (ADAS), satellites, and internet-of-things (IoT) products.
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In NVH Engineering and simulation of Hybrid/Electric Vehicles, the noise from tire, wind or auxiliaries, which consequently become increasingly audible due to the removal of the broadband engine masking sound, should be studied. New noise sources like tonal sounds emerge from the electro-mechanical drive systems and often have, despite their low overall noise levels, a high annoyance rating. Engine/exhaust sounds are often used to contribute to the “character” of the vehicle leads to an open question how to realize an appealing brand sound with EV.
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Vibration Fatigue, Creep, Welded Structures Fatigue, Elastomer and Composite Fatigue with Ansys Ncode, Simulia FE-Safe, MSC CAEFatigue, FEMFAT
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