Skip to Main content Skip to Navigation

Conception, modélisation et expérimentation de moteurs-freins intégrés à réluctance variable et à courants de Foucault

Abstract : The technological development of thermal engines and of power units in general, has been tending towards increased complexity and now requires fail-safe reliability. Testing equipment must also evolve in order to ensure greater reliability and measurement frequency at a minimal cost. Test benches have become entirely automated and allow operating the thermal engine using pre-bench cycles. The loading benches in use today are primarily of the "static" type and feature eddy current brakes. The research presented herein lies within this study framework and has been mainly shaped through the three following areas of investigation : * Critical analysis of existing brakes. We have conducted several tests on homopolar standard brakes (220 kW); these tests and the analyses performed on their results have allowed us both to focus on the effects of magnetic remanence that generate a residual torque and to propose a power supply along with adequate strategies for minimizing this problem. Moreover, this area of research has enabled us to determine the limitations of the brake and, in particular, of the cooling system currently in place. * Development of reliable magneto-dynamic models for a power range extending from 5 to 750 kW. Concerning this second area of research, we have sought to devise non-linear analytical magneto-dynamic models that take both the armature reaction and 3D effects into account. These models are then validated by finite element calculations and tests conducted on existing brakes. The flexibility of these models has allowed us to perform fast parametric studies and to propose, on the basis of the results obtained, methodologies for sizing homopolar eddy current brakes. * Topological study, design, development and experimentation of dynamic loading test benches presenting the two requisite functions : engine and braking. For this third research topic, we have carried out a non-exhaustive study of the various possible solutions for adding a driving function to current brake configurations. The comparison of two topologies (i.e. integrated and separated) has shown us that the first solution provides an advantage in minimizing the revolving masses and shaft lengths, both of which heavily support the vibration behaviour of test benches. This solution has therefore been selected for developing an original-design, integrated brake-engine with switched reluctance and eddy currents. A 24-Nm model has been created and validation tests have demonstrated the feasibility and technological viability of the proposed solution.
Document type :
Complete list of metadatas

Cited literature [22 references]  Display  Hide  Download
Contributor : Hamid Ben Ahmed <>
Submitted on : Monday, January 18, 2010 - 12:59:58 PM
Last modification on : Thursday, March 5, 2020 - 12:06:06 PM
Long-term archiving on: : Wednesday, November 30, 2016 - 11:07:52 AM


  • HAL Id : tel-00448101, version 1



Antoine Lesobre. Conception, modélisation et expérimentation de moteurs-freins intégrés à réluctance variable et à courants de Foucault. Sciences de l'ingénieur [physics]. École normale supérieure de Cachan - ENS Cachan, 2001. Français. ⟨tel-00448101⟩



Record views


Files downloads