Centre National De La Recherche Scientifique

Institut National Polytechnique De Toulouse

Centre National Detudes Spatiales

Electricite De France

Centre National De La Recherche Scientifique-cnrs

Yvan Lefevre

Yves Neau

Christophe Casteras

Pascal Maussion

Olivier Pateau

Dominique Harribey

Philippe Ladoux

Gilbert Manot

An inertial actuation magnetohydrodynamic wheel () comprising a torus-shaped fluid ring () filled with a conductive liquid, at least one effective area () for setting the liquid into motion, and at least one magnetohydrodynamic pump (). The ratio of the set back distance of any magnetic conduction element () of the air gap of any electromagnetic pump () over the internal size of the fluid ring () is greater than or equal to 0.5 and the fluid ring () comprises at least two distinct effective areas (), for setting the conductive liquid into motion, angularly spaced apart by at least 120&#xb0;.

Magnetohydrodynamic inertial actuator

Provided is an induction heating method implemented in a device for heating a metal part, the device including magnetically coupled inductors. Oscillating circuits of the device have at least approximately the same resonance frequency, each inverter is controlled by a control unit to vary amplitude and phase of current passing through the corresponding inductor, the device also including a means for determining said current and an actual temperature profile of said part. The method includes: a) comparing said actual temperature profile with a reference temperature profile and calculating a reference power density profile; b) calculating target currents which the inverters must produce in order for the currents of the inductors to reach suitable target values; c) determining the currents passing through the inductors to compare said currents with said target values and determine correction current deviations, and sending correction instructions to said control units in accordance with said current deviations.

Induction heating method implemented in a device including magnetically coupled inductors

Growing community of inventors

Saint-Jean, France

Yvan Lefevre