Abstract
The vibration of reactors not only produces noise pollution, but also affects the safe operation of reactors. Giant magnetostrictive materials can generate huge expansion and shrinkage deformation in a magnetic field. With the principle of mutual offset between the giant magnetostrictive force produced by the giant magnetostrictive material and the original vibration force of the reactor, the vibration of the reactor can be reduced. In this paper, magnetization and magnetostriction characteristics in silicon steel and the giant magnetostrictive material are measured, respectively. According to the presented magneto-mechanical coupling model including the electromagnetic force and the magnetostrictive force, reactor vibration is calculated. By comparing the vibration of the reactor with different inserted materials in the air gaps between the reactor cores, the vibration reduction effectiveness of the giant magnetostrictive material is validated.
Highlights
Reactors are indispensable basic electrical equipments in electric power system
The measures to reduce vibration and noise of reactors are mainly concentrated on vibration isolation and noise shielding
Noise shielding refers to the use of noise covers and other devices to block the spread of the reactor noise
Summary
Reactors are indispensable basic electrical equipments in electric power system. The vibration will cause noise pollution, and affect the service life of the reactor and cause economic losses. The results show that the mechanical deformation of the giant magnetostrictive material can counteract the vibration force of the reactor. This method has the advantages of simple structure, convenient operation, and overcoming real-time problem of the passive vibration reduction. MAGNETIC PROPERTIES MEASUREMENT OF SILICON STEEL SHEETS AND THE GIANT MAGNETOSTRICTIVE MATERIAL. To analyze the vibration of the reactor including magnetostrictive effect, magnetostriction properties of silicon steel sheets is obtained by the magnetostriction measurement system. B-H working point and the size of the giant magnetostrictive material are based on the reactor and the desired vibration damper property. With iteratively adjusted dimensions of the giant magnetostrictive material and iron cores, we can obtain the desired reactance, loss, vibration etc
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