Builiding of a complete 6kW PV inverter with MPPT chargers

Author	Message
-dex- Regular Member Joined: 11/01/2024 Location: Poland Posts: 99	Posted: 11:24am 11 Jun 2024         wiseguy said   Before you relegate the chokes to the waste bin you should find my earlier communication I dont remember the exact details but thought was it 11 turns would be good but you used 13 (I think those were the numbers) so reducing the ampere turns a little will help reduce the heat a bit.  Anyway hope it is performing to your expectations now. Currently, there is one layer of copper tape, the cross-section of which is  ~10 mm2. 10 minutes of operation with a 2.5kW load causes the temperature to rise to 70°C - this is the data I read from the inverter (it has an NTC thermistor on it) I tried this already before, I used 2 layers of the same tape for one choke, but then the inductance was too low and the cross-section was also not impressive. This is because I can't squeeze anything else in there. That's why I decided to build new chokes that will solve the choke's problem once and for all - I hope   I ordered toroid cores made of sendust material, large enough to fit enough turns to obtain 22uH with using 50mm2 cable. The current E-core coils won't go to waste - I'll definitely use them in another project   Edited 2024-06-11 21:25 by -dex-