What Measures Can Reduce the Noise of a Transformer?

The noise generated during the operation of a transformer not only causes noise pollution to the surrounding environment but also may affect the stability and service life of the equipment itself. Therefore, taking effective noise reduction measures is of great significance. The specific measures include:

Content

● Optimized Core Design
The core is one of the main sources of noise in a transformer. Selecting high-quality silicon steel sheet materials with a low magnetostrictive coefficient can reduce the core vibration caused by the change of magnetic domains. For example, high-permeability grain-oriented silicon steel sheets can effectively reduce magnetostriction and thus reduce noise.

In addition,Reasonably designing the structure and size of the core, such as using an oblique joint method instead of a straight joint, can improve the magnetic circuit distribution inside the core and reduce the vibration caused by the change of magnetic resistance. By accurately calculating the magnetic flux density of the core, it can be prevented from being too high and causing the core to saturate, thereby generating greater noise. In the design of large power transformers, the fine optimization of the core structure and materials can significantly reduce the noise level.

● Installation of Vibration Damping Devices
Installing vibration damping devices between the transformer and the installation foundation is a common noise reduction method. For example, using rubber vibration damping pads, spring shock absorbers, etc., they can effectively absorb and buffer the vibration generated during the operation of the transformer, prevent the vibration from being transmitted to the surrounding structures and the ground, and thus reduce the noise propagation.

For some places with extremely strict noise requirements, such as substations near residential areas, a suitable vibration damping scheme can be customized according to the weight, vibration frequency and other parameters of the transformer. Through a multi-layer vibration damping structure or a combined vibration damping device, the vibration amplitude can be minimized and the noise radiation can be reduced.

● Improvement of the Cooling System
The cooling fans and oil pumps and other cooling equipment of the transformer also generate noise during operation. Selecting low-noise cooling fans with more reasonable blade designs can reduce the turbulent and vortex flows during air movement and lower the aerodynamic noise. Optimizing the layout of the cooling system to avoid resonance between the cooling equipment and the transformer body or other structures. For example, adjusting the installation position and angle of the fan to make the air flow blown out more smooth and reduce the impact on the surrounding components.

At the same time, using intelligent control technology to automatically adjust the rotation speed of the cooling equipment according to the load and temperature of the transformer, reducing the noise generation while meeting the heat dissipation requirements.

● Modification of the Tank Structure
The tank, as the outer shell of the transformer, has an important influence on the noise propagation. Increasing the thickness of the tank wall or using soundproof materials to make the tank wall, such as pasting sound-absorbing cotton and damping materials on the inner wall of the tank, can effectively absorb and reflect the noise generated inside the tank and reduce the noise propagation to the outside. Optimizing the shape of the tank to avoid the formation of cavity structures that reflect and amplify the noise. For example, using an arc or streamlined tank design to make the sound scatter and attenuate better during propagation and reduce the impact of noise on the surrounding environment.

In Summary

The reduction of transformer noise requires comprehensive consideration and corresponding measures from multiple aspects such as core design, vibration damping treatment, cooling system and tank structure. By continuously optimizing these links, the noise level during the operation of the transformer can be effectively controlled to meet the environmental protection requirements. At the same time, the stability and reliability of the transformer operation can be improved, creating favorable conditions for the safe and stable operation of the power system and the harmonious coexistence of the surrounding environment.

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LuShan, est.1975, is a Chinese professional manufacturer specializing in power transformers and reactors for 49 years. Leading products are single-phase transformer,three-phase isolation transformer,electrical transformer,distribution transformer, step down and step up transformer, low voltage transformer, high voltage transformer, control transformer, toroidal transformer, R-core transformer;DC inductors, AC reactors, filtering reactor, line and load reactor, chokes, filtering reactor, and intermediate,high-frequency products.

Our power transformers and reactors are widely used in 10 application areas: rapid transit, construction machinery, renewable energy, intelligent manufacturing, medical equipment, coal mine explosion prevention , excitation system, vacuum sintering(furnace), central air conditioning.

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