Study on Transformer Core Vibration Noise Based on Low-Noise Electrical Steel Sheets

This study investigates the vibration noise of a single-phase four-column transformer iron core based on low noise electrical steel sheets. Firstly, electromagnetic performance tests were conducted on three types of electrical steel sheets, obtaining the hysteresis curve and magnetostriction curve. Subsequently, a model of a single-phase four-column transformer was established, and the acquired data were incorporated into a finite element method simulation model. This resulted in transformer magnetic flux density contour maps, vibration displacement diagrams, and noise levels based on the electromagnetic performance data of the three types of electrical steel sheets. Finally, vibration noise tests were performed on the physical transformer in the simulation model, obtaining the vibration noise values of the transformer iron core under operating conditions. A comparison was made between the experimental values and the simulation results, demonstrating the correctness of the simulation. By comparing experimental and simulation results, it can be inferred that the simulation calculations are accurate. The study on low-noise electrical steel sheets can provide support for the electromagnetic design, vibration reduction, and noise reduction aspects of transformers.