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In the running state of the transformer, since the current flowing through the coil establishes an alternating magnetic flux that is closed along the core magnetic circuit, passes through the primary and secondary windings, and produces the primary self-inductance voltage U1 due to resisting the change of the magnetic flux.
Can 50Hz and 60Hz Power Transformers Be Used in Common?
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Author: Site Editor
Publish Time: 2023-07-21
Origin: Site
The commonly used operating frequency of the global power grid are mainly divided into 50Hz and 60Hz. Transformer users often have questions, whether the
transformers with the same grid voltage and frequency 50Hz and 60Hz can be used in common?
In the running state of the transformer, since the current flowing through the coil establishes an alternating magnetic flux that is closed along the core magnetic circuit, passes through the primary and secondary windings, and produces the primary self-inductance voltage U1 due to resisting the change of the magnetic flux. Its effective value U1=4.44fN1BSx10-4 (U1--primary voltage, 4.44--positive wave voltage form factor, f--operating frequency, N1--primary turns, B--magnetic flux induction, S--core effective cross-sectional area).
Obviously, for the same type of transformer, N1, B, and S are fixed. Under the same voltage U1, the magnetic flux induction B is inversely proportional to the operating frequency f. When the operating frequency is 60Hz, the magnetic flux induction is 0.83 times of 50Hz. times. When the working frequency is 50Hz, the magnetic flux induction is 1.2 times of 60Hz. The magnetic flux induction intensity is small, the no-load current of the transformer is small, and the operation effect is better. The magnetic flux induction intensity is large, the no-load current is large, and even magnetic saturation occurs, which makes the core temperature rise up suddenly and burn out.
According to above analysis and know that if the grid voltage is the same, when the 50Hz transformer is used for 60Hz, the working effect is better. But when a 60Hz transformer is used for 50Hz, the no-load current of the transformer will become larger or it will be burned due to heat.
