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In the course of regular operation, the transformer core experiences magnetostriction. However, with time, it may result in the magnetic core delaminating, increasing the vibration levels that are detected on the surface of the transformer tank during diagnostic testing.
In order to rule out magnetostriction as the source of these vibrations, the goal of this work is to develop a model for analyzing elastic deformations in magnetic core that can be used to power transformers with intense vibrations.
The findings of the research on magnetic core anisotropy are presented, together with a description of the generated model created using the Matlab and COMSOL software and limits on geometry and material parameters.
Modeling of magnetostriction for a five-legged, 200 MVA power transformer with a rated voltage of 13.8/137 kV is done as a case study, which is used to compare elastic deformations and vibration levels.
Magnetic materials have a characteristic known as magnetostriction that causes them to alter their physical dimensions when exposed to a magnetic field. The core dimensions change periodically when the magnetizing field does. This regular change results in vibration and noise.
One thing to keep in mind concerning magnetostriction, though, is that the change in the physical dimensions is very slight, making it exceedingly challenging to evaluate this impact. Here, the magnetostrictive strain is calculated as a function of the magnetic field after being measured across a number of cycles.
The strain is shown as a change in the flux density across one cycle in the butterfly-shaped graph. The physical size variations are in the range of one millimeter per meter, as demonstrated.
The Global Magnetostrictive transformer market accounted for $XX Billion in 2022 and is anticipated to reach $XX Billion by 2030, registering a CAGR of XX% from 2023 to 2030.
launch of the INCON® Magnetostrictive transformer by Franklin Electric. The Magnetostrictive transformer offers high-value, mission-critical, low voltage pad mount transformers and traditional pole top transformers meter-grade accurate performance monitoring.
The Magnetostrictive transformer gives remote access to real-time transformer health data and automated alarms for condition-based maintenance planning by continually monitoring a transformer’s key performance metrics.
