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Generation process of magnetic noise and vibrations
Eomys-doc05
This part of 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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Detailed content:
- Magnetic forces in electrical machines
- Maxwell forces and Laplace forces
- Magnetostriction
- Illustration with tuning fork and rotating magnet
- Notion of wavenumber – rotating and pulsating forces
- Lumped tooth forces
- Global forces – torque, UMP, moments
- Static effect of magnetic forces
- Radial and tangential forces on outer stator
- Radial and tangential forces on inner rotor
- Structural modes of electrical machines
- Stator modes
- Rotor modes
- Dynamic effects of magnetic forces
- Principle of resonance
- Application to stator / rotor modes
- Generalization with modal force
- Transfer paths of magnetic noise and vibrations
Number of slides: 60