Eddy Currents (Quantitative Description) (P_eddy ∝ B²f²t²)
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P_eddy ∝ B²f²t²
What each symbol means
| Symbol | What it stands for |
|---|---|
| B | Magnetic field amplitude (T) |
| P | Eddy current power loss |
| f | Frequency of field change (Hz) |
| t | Thickness of conductor (m) |
When to use this
Induced currents in bulk conductors when flux changes. Minimized by lamination (reduce t). Applications: induction furnace, EM braking, speedometer. Opposes cause (Lenz's law).