VFD question

[NevNZ]

The motor is:
400 volt
3 Phase
4 Pole
50 Hz
1.1 Kw
1400 RPM
2.8 Amp
0.8 Cos (don't know the meaning of this).

 

[G-ManBart]

The VFD data plate says the output is 240V and the motor is clearly 400V....doesn't look like that's going to work properly.

 

[markba633csi]

That's what I was trying to ascertain- that certainly seems like something you should contact the vendor about
I can't see how that can work properly no matter what you do with the VFD settings
Maybe I'm mistaken?
Could it be that the VFD that you have DOES step up the voltage? I would certainly ask the vendor what's up with that

 

[mksj]

They need to replace the motor with a 230VAC rated one, it also changes the VFD programmed motor parameters, and with the higher end VFD's the motor should be auto-tuned to the VFD. This can significantly add to the performance of the motor. There are a few VFD's that have voltage doublers, but not any mainstream ones over 200V that I am aware of. The usual method would be to use a step-up transformer to get to the higher voltage and then have a compatible VFD that operates with that input voltage. That is not an applicable solution in this case, it is clearly a fault of the manufacturer.

 

[markba633csi]

Sounds like a poorly-informed middleman/distributor type of situation, rather than Optimum themselves
Someone didn't do their due dilligence

 

[NevNZ]

I spoke a technician at the supplier today, they are sending people over tomorrow to address the issues. Apparently the lathe has been wired in Star instead of Delta, and this is causing the issue. I'll post the results here once they've change it over. Im very interested to see the difference.

 

[G-ManBart]

I spoke a technician at the supplier today, they are sending people over tomorrow to address the issues. Apparently the lathe has been wired in Star instead of Delta, and this is causing the issue. I'll post the results here once they've change it over. Im very interested to see the difference.

I'm far from a 3-phase expert, but I think they may have said that backwards. 230/400V Star is possible, but not Delta.

 

[markba633csi]

I think that does make sense, delta would be the lower voltage configuration
We assumed up till now that the motor was a single voltage (400v)

 

[G-ManBart]

I think that does make sense, delta would be the lower voltage configuration
We assumed up till now that the motor was a single voltage (400v)

I'm not arguing...honestly just asking. Have you seen motors that are only marked 400V which could also work with 230V? It makes me wonder about the data plate since it has the same name as a lathe, and it's unlikely the lathe manufacturer actually made the motor as well.

 

[NevNZ]

I'm far from a 3-phase expert, but I think they may have said that backwards. 230/400V Star is possible, but not Delta.

Possible I got it around the wrong way :/