L. Rossini, O. Chételat, E. Onillon, Y. Perriard
Centre Suisse d’Electronique et Microtechnique – CSEM, Neuchâtel, Switzerland
Ecole Polytechnique Federale de Lausanne - EPFL, Lausanne, Switzerland
The reaction sphere is a magnetic bearing electromagnetic spherical actuator for satellite attitude control. The reaction sphere consists in a 3D motor composed of a 20-coil stator and an 8-pole permanent magnet rotor. The rotor is synthesized wit a mosaic of 728 cylindrical magnets glued on the rotor back-iron so as to approximate the selected magnetization pattern. These cylindrical magnets ...
D. Andrade, and D. Schiffabuer
Pennsylvania Breaker LLC, Canonsburg, PA, USA
Pennsylvania Breaker presents a dielectric stress study for its 72kV class breaker. This study was instrumental in the design and testing procedures during the research and development phase. COMSOL was incorporated into the design pipeline as an important tool for rapid reference of complicated and costly steady state electric cases. The purpose of this study was to develop a robust geometric ...