Inductor current calculator
Calculate inductor current for AC, DC, or transients using i(t)= 1/L ∫ 𝑣 (t)dt or I=V/XL Where XL=2rfL.
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inductive reactance current
The current flowing through an inductor is dependent on induction, voltage, and frequency. Current in AC lags behind voltage by 90 degrees, and decreases with the frequency, or with inductance.
Formula & Table Summary:
Formula
\( X_L = 2\pi f L \)
\( I_{\text{rms}} = \frac{V_{\text{rms}}}{X_L} \)
\( i(t) = \frac{1}{L} \int v(t) \, dt + i(0) \)
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transient inductor current
Compute inductor current of AC, DC, or transients: I = V / XL with XL= 2pi f L or integrate voltage vs time for non-sinusoidal waveforms.This is useful to design coils and chokes and to analyze power systems to help ensure that current does not exceed component limits, and adheres to thermal constraints.
inductor current calculator
| Vrms (V) | f (Hz) | L (mH) | Calculation | Irms (A) |
|---|---|---|---|---|
| 230 | 50 | 100 | 230 / (2π·50·0.1) | 7.32 |
| 120 | 60 | 50 | 120 / (2π·60·0.05) | 6.37 |
| 240 | 400 | 10 | 240 / (2π·400·0.01) | 9.55 |
| 110 | 50 | 200 | 110 / (2π·50·0.2) | 1.75 |
| 400 | 60 | 2 | 400 / (2π·60·0.002) | 530.52 |
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Frequently Asked Questions - Inductor current calculator:
Use I=Vrms/XL where XL=2πfL.
XL=2πfL, the opposition of an inductor to AC current.
Voltage leads current by 90° in a pure inductor.
Use i(t)=1/L ∫ v(t) dt + i(0) for general waveforms.
Higher frequency increases XL, lowering current.
In steady DC, an ideal inductor acts as a short circuit.
Yes, series resistance limits steady-state DC current.
τ=L/R controls rise or decay of current in transients.
Current cannot change instantly; it starts at its prior value.
Increase inductance, increase frequency, or reduce voltage.
