Guineafowl
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I’m getting a TS light vertical in the next few weeks, fitted with single phase motor and starter. I’d like to run a 3ph with inverter so there may be a chance of swapsies, if you’re interested.
- Thread starter W.olly
- Start date
roofman
Purveyor of fine English buckets and mops
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you have changed your mind that many times your confusing me..anyway step back here as plenty of good advice floating about
W.olly
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when folk say do this do that and get so many other ways to go then somebody says different its not easy when you have little idea on it. good to have many ideas from folk but all need to be looked at the best way to go for me.
W.olly
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whats the reason for you going 3 phase kida. better to run off inverter for speed control ?
Guineafowl
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I have three phase, but would still run through a VFD.
W.olly
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i am still waiting on a price for the Traswave to run my 3 phase. but i will later get a small VFD for the mill as its a small motor. Although if the Transwave ends up being daft money ill be getting the VFD sonner. cheers though for the offer kida
Guineafowl
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No probs. Not a proper machine unless it’s three phasei am still waiting on a price for the Traswave to run my 3 phase. but i will later get a small VFD for the mill as its a small motor. Although if the Transwave ends up being daft money ill be getting the VFD sonner. cheers though for the offer kida
not done it yet
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If it is a transwave converter I would not even consider it. Is it a static or rotary type - or is it a VFD? One is better than the other but both are inferior to a VFD - even a cheap one!
Shox Dr
Chief Engineer to Carlos Fandango
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3ph is smoother than 1ph. You can also adjust speed while keeping the Torque. Subject to the VFD allowing this
Agroshield
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What other advantages could we list? Please add to this list:
Speed can be increased over that provided by mains frequency.
Soft starting (ramp up the speed), so less likely to trip a breaker.
No issues with multiple stop-start or forward-reverse cycles.
Electronic braking, so can slow down faster than just coasting to a stop
Control circuit of VFD is all low voltage, so easier, safer and more versatile.
not done it yet
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Energy wastage - when motor is not running - is much lower (especially compared with a rotary converter).
Emergency stops are all low voltage circuits.
Wedg1e
They call me Mr. Bodge-angles
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Better surface finish: I had a Colchester Student which came with its original 3-phase but had had a single-phase motor fitted.
I kept getting a strange patterning on turned parts; tried all sorts to correct it but it only stopped when I put the 3-phase motor back on.
Guineafowl
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Torque pulsation, I expect. The only real advantage of a single phase motor, is that you can use it on single phase.
W.olly
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Just need to check before I blow myself up lol.
So 240v single phase tp output of 3 phase motor
The motor has this wiring coming out the switch. 3 in the motor.
Have my VFD to wite up. Blue goes in W1 Brown to V1 and both the Black go to U1 ?
Wire out the motor
Out the switch
And instructions
So 240v single phase tp output of 3 phase motor
The motor has this wiring coming out the switch. 3 in the motor.
Have my VFD to wite up. Blue goes in W1 Brown to V1 and both the Black go to U1 ?
Wire out the motor
Out the switch
And instructions
not done it yet
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You won’t blow yourself up but you may well do it to the inverter. I recommend you read the installation instructions properly.
i thought it had to be 220V/380V 3 phase windings in itYes you can. You run it at lower speed but with constant voltage. Sure you get reduced output, so it can cause the motor to lose synch, but it depends how much metal you want to cut. My Fritz werner has cut a lot of metal that way, as does the Richmond horizontal.
Its not perfect, but for hobby use it works.
Its not perfect, but for hobby use it works.
Please don't connect that up! At least not until you've drawn up and photographed your diagram, I have serous doubts about what you've done there....
Draw the circuit, pic please.
