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In this paper, the rotor shape of synchronous reluctance motor (SynRM) is designed using the sensitivity analysis along with the level set method. To reduce numerical errors of sensitivity value on the interface, the adaptive level set method is adopted. The rotor shape of the SynRM is designed to maximize average torque or to minimize cogging torque by distributing the ferromagnetic material over...
The electromagnetic total force and body force density distribution in the high-field magnetic system are important factors for mechanical deformation or vibration, electromechanical-coupled phenomenon, behavior of ferromagnetic material, etc. Since the high-field magnetic system, such as the transformer, electric motor, and generator with magnetic core are driven by very high magnetic flux density,...
This paper presents a numerical method to calculate shape of ferrofluid droplet that undergoes three effects: external magnetic field, gravitational force and surface tension. The shape is calculated using an equilibrium energy condition of the coupled system of electromagnetic field and gravitational field and surface tension. The shape of the ferrofluid is traced using level set method, where the...
This paper deals with a coupling scheme for open boundary problem. It couples an analytical solution of Fourier series expansion with the standard finite element method. The analytical solution is derived for the magnetic field in the outside of the boundary, and the finite element method is for the magnetic field in the inside with source current and magnetic materials. The main advantage of the...
The magnetic force and body force density distribution in high field magnetic system is an important factor to analyze mechanical deformation, vibration or electro-mechanical coupled phenomenon. Since magnetic apparatuses such as transformer, motor and electromagnet is driven by high magnetic flux density, the resulting magnetic force is so large as to cause mechanical problems. Accurate analysis...
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