ASSESSMENT BY COMPARISON OF ELECTROMAGNETIC PROPULSION AND BRAKING SYSTEMS
EVALUATION PAR LA SIMILITUDE DES SYSTEMES DE PROPULSION ET FREINAGE ELECTROMAGNETIQUES
Full-scale tests on electromagnetic propulsion and braking systems can be very costly. It may be cheaper to carry out tests on reduced-scale models by applying the laws of similars. The article gives details of these laws and explains how they should be applied. It then provides examples of the research, based on these methods, carried out by the IRT. The first research project concerns the comparison of the performance of three types of linear motor on 1/3rd scale models. The second is connected with an eddy-current braking system where the currents are not created on the rail but in the wheel; the tests have been carried out with the cooperation of the SNCF on a 1/5th scale model. Compared with conventional shoe brakes, the advantage of the system lies in the fact that the eddy currents penetrate deeply into the body of the wheel and the heat stresses are consequently lower than when the braking effort is localised in the friction area.
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Corporate Authors:
Societe Nationale des Chemins de Fer Francais
92 rue Bonaparte
75 Paris 6e, France -
Authors:
- Giovachini, J L
- Publication Date: 1977-6
Language
- French
Media Info
- Features: Figures; References;
- Pagination: p. 345-352
- Serial:
Subject/Index Terms
- TRT Terms: Braking; Eddy current brakes; Electromagnetic devices; Intelligent transportation systems; Linear motors; Mathematical models; Propulsion; Prototypes; Tests; Thermal stresses; Vehicle power plants; Wheels
- Uncontrolled Terms: Models; Propulsion systems
- Old TRIS Terms: Advanced systems; Electromagnetic braking; Linear electric motor; Wheel thermal stresses
- Subject Areas: Bridges and other structures; Operations and Traffic Management; Railroads; Vehicles and Equipment;
Filing Info
- Accession Number: 00164447
- Record Type: Publication
- Source Agency: Revue Generale des Chemins de Fer
- Files: TRIS
- Created Date: Nov 9 1977 12:00AM