Contribution
Analytical Model for Noise Prediction of Axial Flux Electric Machines
* Presenting author
Abstract:
The necessary reduction of greenhouse gas emissions is a major challenge which affects all areas of life. In order to reduce the contribution from the transport sector, the electrification of aircraft engines currently receives increased attention, where conventional gas turbines are replaced by electric machines. One promising motor topology is the axial flux machine, which offers high power and torque densities and thus makes these architectures a viable option for aviation. For these machines, the fluctuating electromagnetic forces in the air gap between rotor and stator can be assumed to be the main noise source. In order to enable a reliable prediction of noise emissions, the electromagnetic field needs to be modeled to evaluate the forces acting on the structure and, subsequently, the radiation of sound to the far field. The present paper aims to investigate a selected analytical model for the calculation of electromagnetic forces for axial flux synchronous permanent magnet machines and the resulting acoustic noise emissions. Results from this analytical model will be compared to numerical simulations using a commercial FEM-software.