Study on vibration characteristics of deflection generator considering magnetostrictive effect

Abstract

In order to improve the utilization of wind energy and solve the problem of single rotor rotation of existing switched reluctance generators, a new type of deflectable dual stator Switched Reluctance Wind generator is proposed. Firstly, based on the electromagnetic-solid mechanics module, the electromagnetic field, flux density and magnetostrictive density of stator structure are analyzed theoretically by establishing the magneto-solid coupling numerical model. Secondly, the finite element platform is used to model the generator intuitively. based on the theory of mechanics, the basic equation of electromagnetic solid mechanics considering magnetostrictive effect is established. Finally, the finite element method is used to simulate the internal and external stators of the generator and the rotation and deflection of the rotor. The stress distribution and the corresponding vibration displacement are obtained. The simulation results show that: The vibration displacement under magnetostrictive effect belongs to nanometer level and the stress is small, so the influence on generator operation can be neglected. The analysis method of magneto-solid coupling provides theoretical reference in analyzing motor vibration and further optimizing generator parameters.

Keywords

• electromagnetic solid mechanics
• magnetic solid coupling
• vibration displacement
• double-stator
• magnetostrictive effect