Transformer Noise and Techniques of Reduce Transformer Noise
There are many losses are occurred in the transformer, so by this losses and friction, Noise will be produced and which spread the noise pollution in environment.
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| Transformer Noise and Techniques of Reduce Transformer Noise |
So, How noise will be occurs and prevent of noise is provided below in detail.
Transformer Noise
The “hum” noise sound caused by energized power transformer, under no-load conditions, originates in the core where the laminations tend to vibrate by muriatic forces.
The noise is transmitted through the oil to the tank side and thence to the surroundings.
There are the main factors which produce noise in transformers:
Magnetostriction (occurrence of dimensional changes both parallel to, and perpendicular to the direction of magnetization).
The mechanical vibrations caused by the laminations, depending upon the tightness
of clamping, size, gauge, associated structural parts, etc.
The mechanical vibration of tank walls.
The damping.
The noise produced by Transformer may be reduced by the following methods/means:
Prevention of vibration of core-plate by the use of a lower flux density and giving attention to constructional feature(such as clamping bolts, proportions and dimensions of the 'steps' in plate width, tightness of clamping and uniformity of plates).
Using cushions, padding, or oil barriers to sound insulate the transformer from tank.
Designing suitably the tank and stiffeners to check tank wall vibration.
Sound insulating the tank from the ground or surrounding air.
Perfectly noise problem cannot be solved. completely.
