Three phase motors run fine on single phase if you spin them up some then connect power. That's what's going on in the video. They just make about 2/3 rated power. I have an old 10 hp with a 5" flat pulley, and I have started it by wraping a rope and pulling then close switch. When a 3 phase motor is running on single, the 3rd leg actualy generates slightly lower line voltage but this can be use as 3rd leg to run another motor. With this method, idler motor needs to be triple hp of work motor for best results.
Nameplate says "Made in UK", so it is a 50hz motor, and the voltages are standard UK industrial ratings. 240v is a North America standard (60hz). Using a capacitor to turn it into a 'split phase' motor can work, but at a very reduced output power. Single phasing is NOT wise, as the motor windings can burn due to the unbalanced currents. Get ready to spend some money: you would need a GS4-2100 inverter will drive 25Hp with single phase input for $US 5,566.00 from Automation Direct.
favret94: It's easier if you live in a country like Finland or Sweden, where 3-phase comes out of the wall as standard, no tricks and mods or anything, just plug it in and run it. Though it'd be hard to get an 18.5kw motor running on a standard fuse, think about 11kw with soft start is what's doable at the max.
it will run but it will no longer give 25 hp power,..and coil might be burned out try to check the heat sink its so hot...the motor is designed and tested for years before it was sold...and you can not just modify it for a minute...it will just run...
Hi there Im trying to build a rotatory phase converter to run my three phase tyre balancer it has digital display. ive got 240v single phase. with under 1hp motor and a 415v transformer in it. i have a new three phase motor 2hp 415v. I have it running on 240 volts with a cap to start. its wired in star but when i take a reading from each leg ie l1 l2 l3 they only show 192v each. do i need to put it in delta to get the 415v or is this right? hope you can help Nick
I was just reading your specs when i realized there is NO WAY this is a 25hp motor! 220 lbs, thats the exact same weight as my 10hp 220v....wwwaaaaiiiittt. this must be a 400 volt motor! duh! Im not sure if it will work like this. but i would imagine at 220v its going to draw about the same amperage but make 10hp. {really bad amp to hp compared to my motor that was wound to be 200v} Just a thought. interesting to see how it works out. Are you on 50hz or 60hz over there?
Three phase motors run fine on single phase if you spin them up some then connect power. That's what's going on in the video.
They just make about 2/3 rated power. I have an old 10 hp with a 5" flat pulley, and I have started it by wraping a rope and pulling then close switch. When a 3 phase motor is running on single, the 3rd leg actualy generates slightly lower line voltage but this can be use as 3rd leg to run another motor. With this method, idler motor needs to be triple hp of work motor for best results.
Nice work, people don't understand how easy it is to build a rotary phase converter and run 3 phase equipment.
It' only easy when you live in a country like england and you have a 100 Amp single phase line powering your home, I must say I' m quite envious...
Nameplate says "Made in UK", so it is a 50hz motor, and the voltages are standard UK industrial ratings. 240v is a North America standard (60hz). Using a capacitor to turn it into a 'split phase' motor can work, but at a very reduced output power. Single phasing is NOT wise, as the motor windings can burn due to the unbalanced currents. Get ready to spend some money: you would need a GS4-2100 inverter will drive 25Hp with single phase input for $US 5,566.00 from Automation Direct.
favret94: It's easier if you live in a country like Finland or Sweden, where 3-phase comes out of the wall as standard, no tricks and mods or anything, just plug it in and run it. Though it'd be hard to get an 18.5kw motor running on a standard fuse, think about 11kw with soft start is what's doable at the max.
it will run but it will no longer give 25 hp power,..and coil might be burned out try to check the heat sink its so hot...the motor is designed and tested for years before it was sold...and you can not just modify it for a minute...it will just run...
Hi there Im trying to build a rotatory phase converter to run my three phase tyre balancer it has digital display. ive got 240v single phase. with under 1hp motor and a 415v transformer in it. i have a new three phase motor 2hp 415v. I have it running on 240 volts with a cap to start. its wired in star but when i take a reading from each leg ie l1 l2 l3 they only show 192v each. do i need to put it in delta to get the 415v or is this right? hope you can help Nick
Better find a half the power motor on 1 phase.
Same power op 230 and less weight.
just use a VFD (inverter) ,it will be much easier
its only easy when you know how ! just getting the capacitor values right can take some time and obviously not killing yourself in the process!:-}
I was just reading your specs when i realized there is NO WAY this is a 25hp motor! 220 lbs, thats the exact same weight as my 10hp 220v....wwwaaaaiiiittt. this must be a 400 volt motor! duh! Im not sure if it will work like this. but i would imagine at 220v its going to draw about the same amperage but make 10hp. {really bad amp to hp compared to my motor that was wound to be 200v} Just a thought. interesting to see how it works out. Are you on 50hz or 60hz over there?
Sir can you share me a link on how can we do this?..tnx.
Ok is it the big or the little thing that makes the power
Hi there Andrew. I have a question for you. is the starter motor still electrified"working with current" after the big kahuna has taken flight?
Dear sir, Can i use 5HP motor to my home electric supply-220 Volt.
Nice sir
super
How can built this machine in home.
good
Like it
Hi