Optimisation design of double-column multi-gap reactor core structure for noise reduction

Abstract

Abstract The noise from a double-column multi-gap reactor is very loud and should be controlled. Based on different gap configurations, the gap configuration design schemes of the double-column multi-gap reactor to noise reduction are proposed. According to the positions of the gaps, the 20 gaps of the actual reactor are simplified into five gaps. Then, 31 reactor finite element simulation models are constructed respectively according to the gap position or length. A three-dimensional (3-d) electromagnetic–mechanical weak-coupled model is used to study the average surface vibration velocity of each reactor core simulation model with different gap configurations. The 3-d anisotropy of magnetisation curves (BH curves) and magnetostriction curves of laminated Grain-oriented steel plates are considered. Some gap configuration design schemes are proposed on the basis of the results of simulations. Two double-column multi-gap reactor models are used for comparative testing. The test results show that the gap configuration design schemes can reduce the sound power level of the reactor by about 6.836\u202fdB. Finally, gap configuration design schemes for noise reduction of a double-column 20-gap reactor are proposed.