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Hello Roddy Wayne,
It is a matter of measuring the voltage drop across a known resistance, the more voltage lost, the higher the current being used by the load. I would use the ADC to measure the voltage on both sides and subtract the lower from the higher. Build a lookup table with PWM duty cycle calibrations.
If you do not believe in MAGIC, Consider how currency has value simply by printing it, and is then traded for real assets.
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Since you have a RMS-DC converter, I suspect you already know the output current via this dc reading. If this is true, all it takes is a little proportional control to correct the output in relation to the input.
The PWM will be proportional to the error in the actual output.
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If you need to measure current, use an Allegro Hall-effect sensor. Isolated, accurate, high-output.
Charles Linquist
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Thanks Jerson!
Yes, you are right in assuming that I have detected this current draw correctly. So, I guess I'll need to build a lookup table with the PWM percentages in it.Originally Posted by Jerson
Thanks again Jerson!
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