Having had a quick scan back through the thread, I think we established the motor was 415V in delta (more modern motors are generally 240V delta/415V star).My confusion (and remember i dont really understand this) is that the VFD says 380v output in the amazon link, but then says in the manual (on page 5) that the motor has to be a 220v delta connection.
The diagram above shows the motor in delta, so i think im ok?
What is written on the inverter itself?
That manual is only for 240V in/240V out versions, so although the functionality will be the same, the output voltage changes, so needs a 415V motor connected.
You can, but the start up surge requires a substantially overrated inverter, along with the infrastructure to support it.Secondly -
I didnt really understand then (or even now) and thought that you had to have a VFD for every motor, but reading back over this thread, it seems that i could just use one boost unit, correct?
At the time, i also purchased this unit -
Could i actually just fit this to the unit and run it with entirely stock wiring? I mean, put a plug on the inverter, and just plug the stock 3ph unit into it?
A thicknesser has quite a high amount of inertia, so would have a substantial start up current requirement. An inverter reduces the start up surge due to being able to slowly accelerate the motor/load up to speed.
As you have both inverters, I'd check their rating plates, and if they are both 'boost' inverters with 240V/380V out, I'd use both of them.I thought the VFD had to configured to each motor, but this comment -
...makes me wonder if im not over complicating it?
I have both inverters now. I think one was £50 and the other £80 or something, and i have no other 3ph gear, so is my best plan to fit both of them (assuming ive got it right that the small one will actually do the job?)
Thank you.
On the main motor, it will allow for a nice smooth start-up with little surge, and on the feed motor, it will allow you to control feed rate.