Guru
Joined: 02/02/2017
Location: AustraliaPosts: 1459
| Posted: 10:19pm 17 May 2021 |
Hi FF
the situation now is that the nanoverter board has been proven to work well.
This is a control board running my firmware.
The power board design above is not proven yet. It is almost identical to the board
that ran 4 x 3 FETs at 11kW at 45V DC. The changes relate to silk screen errors, a dumb mistake with the 18V zener that is used to make 15V gate drive supply and 4 pull down resistors that ensure the FETs stay OFF during power up/brown out conditions.
I could apply this fixes without moving anything on the first iteration PCB.
I think it will work fine.
Since it uses the same totem-pole drive as Madness's board, I expect it will run
well with all 6 FETS installed.
I just ordered 5 picoverter PCBs and once they arrive I will build one and
complete the firmware for it. If I were you I would use this to control the powerboard.
It will be a much simpler build. It will run the nano1 code as used in the nanoverter
but with some modification. I think in a week the picoverter code will be completed
and I will change my home inverter to use/prove it.
Your output voltage of 120V is going to work fine with these.
Other parts needed would include a small (wallwart?) 120V ->12V transformer for voltage feedback, a couple of large chokes that will not saturate at about 2x the maximum operating power levels, the transformer as described by InPhase.
Starting your own thread would be a good idea since it keeps all your info in one place.
I would prefer no SMD design since it's getting to the stage for me that even through-hole projects are beyond my eyesight. I like having most parts available at home when building a board. IF SMD there would need to be a few big orders of assorted passives. And you need to select them before soldering in place...