Centre National De La Recherche Scientifique

Institut National Polytechnique De Toulouse

Liebherr-aerospace Toulouse Sas

Liebherr-elektronik Gmbh

Centre National De La Recherche Scientifique-cnrs

Pierre Brodeau

Thierry Meynard

Nejat Mahdavi

Ralf Cremer

Anne-Marie Lienhardt

Vincent Devanneaux

Regis Ruelland

Jean-Pierre Carayon

Dr-Ing Nejat Mahdavi

Dr-Ing Ralf Cremer

Youcef Abdelli

Régis Ruelland

The invention relates to a drive circuit for an electric motor having an aerodynamic bearing of the motor shaft, wherein the drive circuit comprises at least one storage means for storing electrical energy by which the electric motor can be fed with electrical energy on a failure of the supply voltage or DC-link voltage to obtain a minimum speed of the motor shaft required for the air support at least at times.

Drive circuit for an air bearing motor

The invention relates to a device having a polyphase electrical machine, wherein a plurality of inverters (), which are controlled by an interlaced control modulated by pulse width to an identical cutoff frequency, provide, on the phase outputs thereof, an alternating voltage signal having an identical fundamental frequency, amplitude and phase to an electrical machine () that comprises at least two separate so-called star windings (), each star winding being supplied by a related inverter, each phase output of which is connected to a phase circuit that includes the phase winding of the star winding, the device being characterized in that each phase circuit for a star winding has a negative mutual inductance with the homologous phase circuit of another star winding.

Device with a polyphase electrical machine, and related electrical machine

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Toulouse, France

Pierre Brodeau