The purpose of this research orientation, started during 1997, is to analyze the generation of the acoustic noises phenomena, during the association of an electric machine and a power converter (magnetic noises).

Its applications can be multiple, but design of the machine unit + converter, starting from an analytical approach, and/or the adaptation in real time of the PWM strategies remain the principal goals of the work carried out.

The applications of the study considered and the will to approach the electromagnetic and vibratory phenomena in a unified way, naturally led us to a representation of the phenomena based on the Fourier analysis. An original approach was developed and led to a unique analytical formulation, allowing the resolution of radial efforts exerted on the stator (essential source of the magnetic noises), and of the torque pulsations of the machine, starting from the knowledge of the windings distribution and the spectral contents of the injected currents.

Various stages of modeling

It makes it possible, moreover, to approach the modal analysis of the structure in a "natural" way. A bench of characterization of the acoustic and vibratory phenomena will have been developed thanks to the financial support of the ANVAR. This research orientation, although recent in our Laboratory, quickly integrated the GDR "Safety and availability of the electrotechnical systems".

The purpose of this research project, independent of any industrial contract, is to establish a complementary competence to the Laboratory on two of its research orientations:

Design, modeling and optimization of the electric actuators (COMEC)

Interaction of the power electronics and the electric machines (AS2E )