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How to calculate power consumption of inductor with square-wave AC source?
I am trying to design an electromagnet and I am trying to calculate the power consumption of it. Since I want to be able to control the frequency of the AC current, I have designed a circuit where I can control the frequency with a microcontroller, but it will have a square-wave voltage source.
The question I have is how do I calculate the resistance of the circuit? I know that you have to calculate the inductive reactance and the impedance if it was a sinusoidal AC current, but does that still apply to square-waves?
2 Answers
- ?Lv 68 years agoFavorite Answer
Square wave are the summation of an infinite number of odd harmonics of sinusoidal waves.
To get an approximation use the first few terms of the series as shown in the link
- ?Lv 78 years ago
An ideal inductor does not consume any power. However, a real inductor has some series resistance. You can easily calculate the DC resistance. If your frequency is high, you need to take into account the skin effect.