Thread: 240V VFD to power 110V motor
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30-10-2021 #1
Since nobody seems to want to buy my old lathe due to it's current dual voltage setup, I'm thinking about changing it so it runs solely of 240V.
The spindle is easy enough to sort, but the turret is more of a problem.
It uses a 600W 3 phase 110V motor, which is currently powered via a 3 phase 415->110V transformer, then two interlocked contactors for forward/reverse.
If I was to power it with a VFD, am I correct in thinking, all I need to do is change the rated motor voltage setting in the VFD from 230V, to 110V?Avoiding the rubbish customer service from AluminiumWarehouse since July '13.
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31-10-2021 #2
Not sure about that. In my experience (limited), the VFD's voltage output is pretty much set. For example in my 9100 VFD, they offer some tuning of the output but its like 380-410, not anything that would allow me to half the voltage.
That said, why not try one, set it down 110V and use a dummy load and measure what it outputs.
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01-11-2021 #3
Are you sure that's the reason it isn't selling? The way I see it, you are proposing to spend money to replace a perfectly acceptable and well understood method of powering the 110V motor with something which is probably less reliable, more complex and difficult to replace or fault-find at a later date.
KitAn optimist says the glass is half full, a pessimist says the glass is half empty, an engineer says you're using the wrong sized glass.
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01-11-2021 #4Avoiding the rubbish customer service from AluminiumWarehouse since July '13.
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01-11-2021 #5
I've had a couple people interested, but they've not had access to 3 phase, which is why I'm thinking about changing it.
Currently it needs 3 phase for the spindle and turret, and single phase for the controller and servos.
I am considering keeping it, as it can do things it's replacement can't, but I would like to simplify how it's powered regardless.Avoiding the rubbish customer service from AluminiumWarehouse since July '13.
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02-11-2021 #6An optimist says the glass is half full, a pessimist says the glass is half empty, an engineer says you're using the wrong sized glass.
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