Inductors - Energy Stored

Energy stored in the magnetic field

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The energy stored in the magnetic field of an inductor can be expressed as

W = 1/2 L I2         (1)

where

W = energy stored (Joules)

L = inductance (henrys, H)

I = current (Amps, A)

Example - Energy Stored in Conductors

The energy stored in a conductor of 10 henrys with a current of 5 A can be calculated like

W = 1/2 (10 henrys) (5 A)2

    = 125 Joules

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