Hi everyone, I have a question maybe one of you can help me out. I have been working on a solid state tesla coil made with mosfets and a sg3524 PWM chip, I have got it working and am in the process of adding a current limiter to it (Mosfets can get expensive). The current limiter works with a current transformer on the output from the H bridge and has a 2:33 turns ratio with a 1.5 ohm resistor. By measuring the voltage across the resistor, I can calculate current using ohm's law. That part is all fine and good. My problem is that in my experience I have always worked with a sine wave current AND voltage, so finding rms watts was a simple matter of 1.414. With this setup however, I have a squarewave voltage waveform and a sinewave current waveform, to me it doesn't seem like the same equation would apply, thoughts?