Builiding of a complete 6kW PV inverter with MPPT chargers


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wiseguy

Guru

Joined: 21/06/2018
Location: Australia
Posts: 1172
Posted: 03:01am 03 Jul 2024      

In the picture of the current sensor it appears that the copper wire passes 11 times through the centre hole of the current sense transformer ?  Unless it is an optical illusion, it means that your max current trip is now actually 10% higher than you were trying to set ?

How is your inverter running, do you see any flicker of your room lights when a heavy load is switched on or off?  Do the Fets or Toroid get very warm under tests so far?

I believe your chokes are a total of 60uH, I would have thought that as per all of KeepIS's testing that a value around 40-45uH is probably closer to the mark. In my experience too, more inductance is not actually better, whilst a larger value might make the 50Hz "cleaner" and a lower idling power, it may not be best suited for larger loads.

The slight ripple observed on the mains output with smaller chokes should not cause any issues with the load, you only have to look at normal mains and the crap supplied with the fundamental 50Hz from the grid.