Guru
Joined: 21/06/2018
Location: AustraliaPosts: 1205
| Posted: 06:39am 26 Jul 2024 |
Hi Ziki, those devices are really meant for High voltage switching at high current. Whilst they could certainly handle the current required, their losses due to their inherent higher VCE when turned on would make them quite inefficient. For instance 6kW would be an input current of ~ 130A from 48V, these devices would be losing ~ 500W of power as heat, nearly 20% loss due to their ~2V C-E saturation for each switch.
If your battery source was 200V instead of 50V then the losses would be ~120W. I have not tried IGBT's on the inverter. Whilst I encourage people to play my suggestion is to just build the inverter as presented, when it is working, by all means experiment as you then also have a working reference unit to compare to.