|Authors||Raphaël Pile; Yvonnick Le Menach; Jean Le Besnerais; Guillaume Parent;|
|Status||Accepted: 22nd International Conference on the Computation of Electromagnetic Fields (COMPUMAG19) to be held in Paris, France, July 15-19, 2019|
|Keywords||Magnetic forces, electric machines, electromagnetics, magnetomechanical effects, vibrations|
The Maxwell Tensor (MT) method is widely used to compute global forces or local surface forces for vibroacoustic design of electrical machines under electromagnetic excitation. In particular the air-gap Maxwell Tensor method is based on a cylindrical shell in the middle of the air-gap. This communication proposes to quantify the differences between the air-gap MT and the magnetic force wave experienced by the stator. In particular the air-gap to stator transfer and the tooth mechanical modulation effect are studied. A numerical application is performed with a turbo-alternator to illustrate the respective and combined effects of both phenomena. The communication highlights that the tooth mechanical modulation alone is not necessary relevant for electrical machines with a high number of teeth. However the combination of the two phenomena has a clear impact on the calculated surface force wave.
The one page digest can be found here:
Study of the combined effects of the air-gap transfer for Maxwell Tensor and the tooth mechanical modulation in electrical machines
The poster can be found here: