Induction Cooktop STEVAL-KITXCB

[amnbkr]

Hello all, 

I was implementing software for this kit STEVAL-KITXCB from ST, and I was wondering how to measure power of the inverter. 

 

I'm using now two ADCs at sampling rate 2 MSBS to read both current and voltage of the inverter, But I don't know what the exact equation is to calculate the power. Can anyone help?

[AScha.3]

To get the average power, it's much more easy to use some power meter at the mains input.

But if you want to try: power is just U*I , for every sample you have to get both at same time and then add all ws (WattSeconds) together, then divide/ time. 

Usually this is not done in cooking appliances, because you cannot change it anyway: it's a resonant power, you just can switch on or off.

So usually just the on-off time is set or the target temperature is the thing, you need to measure and control/regulate.