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This work addresses an efficient and highly reliable Noise-Vibration-Harshness simulation and analysis framework for electrical induction drives in E-mobility applications. Based on a combined nonlinear analytic and Finite-Element modeling structure in spatial frequency space the entire operational Noise-Vibration-Harshness-simulation is embedded in one simulation environment and can be performed...
This paper investigates the relationship between vibration and current in induction motors operated under external vibrations. Two approaches are usually available to define this relationship. The former is based on airgap variations, while the latter is based on torque perturbation. This paper is focused on the airgap variation model. The ball bearing fault is modeled by contact mechanics. External...
Increase of stray losses in the skewed rotor is mainly due to the cross-currents flowing from the conductor into the laminations. These losses are strongly related to the contact resistance between the bar and the laminations which depends on several factors including the casting process. A substantial reduction of cross-current losses can be achieved by changing or removing skew and by employing...
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