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This paper deals with the comparison of two actuators with dierent frameworks, for a direct drive active stick application. Each actuator will be compared with three dierent sets of specications which impose many constraints as: high torque, small volume, low temperature, etc. The high required torque per unit of mass and the small volume allowed involve the use of synchronous Halbach permanent magnet (PM) topologies which have the best torque performances. In this article, an analysis and a comparison of two optimized actuators designed with a Halbach conguration are done. It is a linear actuator and a double airgap rotating actuator. The electromagnetic torque is calculated by the Laplace force for which the ux density generated by the Halbach PM conguration is dened by a Laplace equation and a Poisson equation. An analytical optimization under a set of nonlinear constraints will be realized with the analytical expressions of the torque we got previously. In order to validate the analytical model, nite-element analysis (FEA) simulations will be performed on the optimized structure. Finally, two actuators will be compared in order to give the best compromises for the stick application for each set of specications

COMPARISON, WITH AN ANALYTICAL OPTIMIZATION PROCESS, OF TWO SYNCHRONOUS HALBACH PERMANENT MAGNET MACHINES, FOR A DIRECT DRIVE STICK APPLICATION