1 / 11

4th Japan-France Cooperative Program Seminar Nara - Japon - 4/7 Oct 2004

4th Japan-France Cooperative Program Seminar Nara - Japon - 4/7 Oct 2004. Electromagnetic levitation under pulsated magnetic field. J. ETAY and B. BARDET EPM-Madylam ENSHMG BP95 38402 S t Martin d'Hères Cedex (FRANCE). Levitation. Global balance. e.m. levitation. Local balance.

merrill
Download Presentation

4th Japan-France Cooperative Program Seminar Nara - Japon - 4/7 Oct 2004

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. 4th Japan-France Cooperative Program Seminar • Nara - Japon - 4/7 Oct 2004 Electromagnetic levitation under pulsated magnetic field • J. ETAY and B. BARDET • EPM-Madylam ENSHMG BP95 38402 S t Martin d'Hères Cedex (FRANCE)

  2. Levitation Global balance e.m. levitation Local balance e.m. shaping

  3. global oscillations local oscillations to be eliminated to be promoted • Levitation : main instabilities Cummins D.L. and Blackburn, D.A., 1991, Journal of Fluid Mechanics, vol 224

  4. 350 kHz 0,1 à 10 Hz 250 kHz heating-exciting levitation - centering • Why ? Sketch of the TEMPUS-MSL performe measurements of thermophysical properties of liquid metal alloys, in space

  5. Surface tension Viscosity • How ? no gravity Lamb, H, 1975, Hydrodynamics, Cambridge University Press

  6. Measuring equipment I With our power suppy • Levitation under pulsated magnetic field a good tool to more accurate measurement easy to use +no-contact + double checking

  7. Set-up • Experimental facility Nickel physical properties Characteristics of the experiment

  8. achieved levitation achieved melting no thermal equilibrium Experimental Results

  9. f2=0 Hz f2=8 Hz f2=7.5 Hz f2=8.5 Hz Spectra of Io(t)

  10. ∆f1 is a relevant for the global stability of the load • Comparison ∆f1 and peak values

  11. Conclusions • Stable electromagnetic levitation achieved • Original system of measurement tested • Detection of the state of global stability of the load achieved • Can be use on all induction system powered by triode power supply • To be validate : remote control of f2 = automatic excitation of the first resonance.

More Related