Optimization of electric motor for a solar airplane application
This paper presents a method to model and optimize brushless dc motor for a solar airplane. In order to obtain the optimal solution for the given specifications, all free parameters are analyzed globally in one go. For this, the commercial optimization software Pro@Design is used. The method is fully analytical and deterministic. The actual multiphysic model comprises electromagnetic, thermal, and propeller models. Different results of the design of solar airplane motor using this method are presented
Brushless DC Motor for a Solar Airplane Application: Comparison between Simulations and Measurements
The paper presents a comparison between analytical model, the finite elements method (FEM) simulations and measurements for a brushless DC motor used in a solar airplane project. In the preliminary conception phase, an optimization using an analytical model is performed. The motor efficiency and its weight are the key parameters. According to the obtained theoretical optimal configuration, a prototype is built. Airgap flux density, back-emf, iron losses and cogging torque are measured to validate the analytical model. Using a customized test bench, a special emphasis is made on the iron losses in the whole motor (stator and rotor).
Experimental observation of a strange nonchaotic attractor.
Evidence is presented for the existence of a strange nonchaotic attractor in a two-frequency quasi-periodically driven, buckled, magnetoelastic ribbon experiment. Scaling behavior in the Fourier amplitude spectrum is observed in agreement with predicted scaling behavior for strange nonchaotic attractors. Dimension measurements also support the existence of a strange nonchaotic attractor