Energy Stored in Inductors

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

W = 1/2 L I²                        (1)

where

W = energy stored (joules, J)

L = inductance (henrys, H)

I = current (amps, A)

Example - Energy Stored in an Inductor

The energy stored in an inductor with inductance 10 H with current 5 A can be calculated as

W = 1/2 (10 H) (5 A)²

    = 125 J

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This page can be cited as

• Engineering ToolBox, (2008). Energy Stored in Inductors. [online] Available at: https://www.engineeringtoolbox.com/inductors-energy-stored-d_1391.html [Accessed Day Mo. Year].

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