27 lines
975 B
Plaintext
27 lines
975 B
Plaintext
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= Transformers =
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Transformers are an application of mutual inducatance, caused by inductors.
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Transformers transfer power between two inductors that share a mutual core.
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Two sets of windings (giving winding is primary, pulling winding is secondary)
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are used and rated in the given direction, however it works both ways.
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By using different amounts of windings on each side we can step up or down
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voltage and current. This is because the same amount of energy is on both
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sides, however if there are fewer turns then the energy is more concentrated,
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leading to a step up transformer.
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The relationship between input and output voltages are based upon the primary
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winding N,,p,, to the number of turns on the secondary winding N,,s,,. The
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relationship with their voltages _E_ is shown below
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E,,s,, / E,,p,, = N,,s,, / N,,p,,
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E,,s,, = E,,p,, * N,,s,, / N,,p,,
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Example,
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What is the voltage across a 500 turn secondary if 120V is across a 2250 turn
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primary?
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120V * 500 / 2250
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