Research on Split-Core Reactor Vibration Reduction Method Based on Magnetostrictive Effect

Abstract

The reactor is an important power equipment in the transmission and transmission system, which plays many different roles in the power system. As a typical reactor structure, the split-core reactor can reduce the residual magnetism and effectively control the inductance. In recent years, it has developed rapidly and has been widely used. The vibration noise generated by the power equipment in operation not only affects its normal operation and service life, but also produces audible noise and other environmental problems [1]. How to reduce its vibration noise effectively has become an urgent problem for manufacturers and power departments. Accurate measurement of magnetization and magnetostrictive properties of silicon steel is the basis for the study of reactor noise and vibration. Lieven Vandevelde, a Belgian scholar, puts forward the method of calculating the deformation of an object due to maxwell and magnetostrictive force by means of finite element analysis [2]. GaoYanhui, Japan, Kazyhiro Muramatsu USES the relationship between the node displacement, the magnetostrictive stress of the node and the distance between the node and the center point to calculate the vibration displacement of the iron core of the reactor [3]. In the literature [4], the British scholar Annable Shahaj proposed using magnetic twin chips to control the magnetostriction on the stator teeth of the motor, and the magnetostrictive force components were offset by the magnetostrictive force. Manufacturers often compression core column and base structure, such as the increase of rubber vibration isolator between ontology and body and improve the air gap materials and other methods of reducing the electromagnetic vibration in the reactor from the vibration mechanism of reactor vibration noise research is less. Calculating the magnitude and distribution of electromagnetic vibrations is necessary for designing reactors with lower vibration noise. Based on the measurement results of the magnetization and magnetostrictive properties of orientation silicon steel and non-oriented silicon steel, the model of three-dimensional split-core reactor is established. Based on the inherent magnetostrictive properties of oriented and non-oriented silicon steel sheets, a new type of iron core with alternating core-column structure consisting of oriented silicon steel sheet and non-oriented silicon steel sheet was proposed. Numerical calculation of magnetic field, stress field and vibration displacement of reactor under ordinary structure and new structure, the results show that the method has a certain damping effect.