Electronics Fundamentals/Electromagnetic Devices/Transformer

Transformer

A transformer is an electronic component that has the capability to increase, decrease or buffer voltage

Transformer is constructed from two coils wounded on two sides of a square

{\frac {V_{o}}{V_{i}}}={\frac {-N_{2}{\frac {d\phi }{dt}}}{-N_{1}{\frac {d\phi }{dt}}}}={\frac {N_{2}}{N_{1}}}

V_{o}=V_{i}{\frac {N_{2}}{N_{1}}}

Step Up Voltage

V_{o}>V_{i}

N_{2}>N_{1}

Step Down Voltage

V_{o}<V_{i}

N_{2}<N_{1}

Buffer

V_{o}=V_{i}

N_{2}=N_{1}

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