Patent ID: 9020156
Filing Date: 2015-04-28
Classification: G10K,H01F

Abstract:
1. A method for reducing the noise emission of a transformer, the transformer tank of which is filled with a liquid and the tank wall of which vibrates during operation, comprising: detecting natural vibration values of the tank wall for at least one excitation frequency; determining at least two eigenforms, from which the vibration of the tank wall is composed at an excitation frequency, by means of computer-aided processing of the natural vibration values, wherein areas of maximal curvature of the tank wall are determined on the tank wall in each case by means of computer-aided superimposition of these at least two eigenforms; arranging a vibration loading device in at least one of these areas; and activating the vibration loading device by means of a control device in order to counteract the vibration of the tank wall.