Magnetostrictive effect is the most important reason for vibration of transformer and reactor

the vibrationcharacteristics of the normal operation of the core and containing DC components is analyzed based on internal theconservation of mechanical energy theory in this paper. The vibration mechanism of the two-stage magnetic-valvecontrollable reactor core in normal operation and with DC component is analyzed

and measured vibrationacceleration at different points of the core of the reactor under the normal load case by building vibration test andmeasurement platform. At the same time

the analysis of the vibration characteristics and measurements of themagnetic valve’s vibration characteristics in case of DC bias have been made

the results show that magnetic valvevibration increases with the DC component increases

the degree of waveform distortion also increases

theharmonics are showing an increasing trend and their growth is different. This study results verify that the vibrationcharacteristics of two-stage magnetic-valve controllable reactor core under DC bias

while provide a strongexperimental basis for the subsequent vibration and noise reduction.