what is the accurate method for measuring dc input power of a square wave inverter,with variable duty cycle?how does the current fed back to
battery(through reverse diodes of mosfets) when the two mosfets are OFF
is accounted(considering push-pull operation). Will the RMS power be equal to the average power if we consider near
Add a large filter, perhaps a 2200uF capacitor, followed by a 500uH inductor rated for the current, followed by another 2200uF cap and then the circuit. At the input, add a small series resistor, 0.1 ohm or so, and measure the voltage across it.
RMS = average = DC, by definition. Any variation in the signal, by definition, is NOT DC, so does not hold the same relation. That's why you must filter to prevent reading errors.
Tim
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