Connecting 3x1 Phase Motor to 3 Phase Power

You can run a single phase motor off of a single phase of a 3 phase system if the voltage is right (eg. 347V lighting is very common in industrial building around here; it's a single phase of 600V to neutral). For safety purposes you should look at individual fused disconnects for each load.

I wouldn't count on the synchronization factor though. With different tolerances, slip etc. from motor to motor you could have a variance apart from the normal lag of each phase. Also, phases are often unevenly loaded so you can't count on identical voltages on each. A VFD may allow you to adjust the output voltage to your 220V requirement if needed, and would remove any problem of balancing the input phases. you'll have to ask someone else about running motors on individual phases off it though.

ok no jokes....bad idea. you'll have more success using s DC motor, it will be much easier to control it's speed

I smell smoke

Washing machine motors?

Send us a picture, before the fire.

You are the expert, you tell me. Thank for commenting, appreciate it...

NO, I'm not the expert. I just have an opinion that this is a very bad idea.

Syncronization will be a problem, as will mechanically connecting three different motor shafts.

And, unless you have a gear reducer, I don't think these motors will develop sufficient torgue for use as grinders.

Let us know how it works.

Even identical motors on the same shaft can be a problem. The most powerful motor will do most of the work and it may cause the other motors to work as a generator, taking away from your available torque.

It might also be possible to set up an oscillation between the two motors where one causes the other to speed up and slow down at the natural (or harmonic) frequency of the entire system. It might be fun to watch for a few seconds, but it won't be very useful.

Sell your three motors and use the money to buy one motor instead.

This is a good recipe for either a convector heater or a fuse-blowing device. Do make sure that all CR4 readers are standing well back before energising this contraption.

will do, but ideas can't kill. You did read it is only an idea, not something going to happen in my garage tonight. Thanks for commenting appreciate it...

Yes you can run three identical single phase motors from a three phase power source with their shafts coupled directly together without problems.

The reason it will work is that single phase motors have a somewhat variable slip ratio from no load to full rated load which will allow them to automatically self balance their respective mechanical power outputs between them if each of the phase voltages are within the motors working specs.

The VFD will not work however being that each motor is still a single phase motor with its own starting windings and related components. For a VFD unit to work it has to be connected to a three phase motor.

For what its worth good used three phase motors are very cheap to pick up. Just ask around your nearest electric motor winding shop. The odds are they have a few or know of someone who does. Salvage yards are another good location to look as well. Much industrial machinery gets scrapped out that still has good working motors on it and th salvage yards tend to separate electric motors from the rest of the materials so it easy picking to get them there. Best part is you will only pay scrap recycle value too!

Thank you very much good sir, i appreciate cleen cut informal answers i can learn from. i am just a tech head trying to learn. It was just an idea i have had in my head for some time and no matter how i try to google it i can't find the accurate answer. so i cast this idea to you people. ,,can i run a 3x 1ph motors from an 3ph power,,.

3 PH power at home too? or are you planning to use 3PH at work and single PH at home? any Idea how many RPM the motors are wound for?

it is just what are the possibility to use a 3ph power...

Good luck. I re-read your initial post.

I'd suggest that you continue your work.

Unfortunately, you have "4 universal washing machine motors which are very similar in size and powers" and not, "3 identical 1 phase electric motors".

You may want matched motors.

Yes i know, i was just saying the closest to match is this collections of 3 to 4 universal motors i do own, but in the theory i would use 3 exactly the same motors.

But, just so you know, so you don't have to be worry about my health and safety. I am assembling a kit from velleman Universal AC Motor controlol. K2636 velleman Motor control. K2636 And it is capable to manage up to 5,5 amps at 220v.

And also i am assembling a motor controller from a book ,,Electric motors in the home workshop after Jim Cox. so i am in good hands, regarding controlling the speed of my motors. the Jim Cox circuit.

just to let you know i am not a complete idiot...

If you have 3 ph to hand you can run 1 or 10 1ph motors from just one of the phases. After all, most houses are wired this way. IF 3ph wiring runs down your street the utility will connect your house along with several others to one ph and neutral; a similar number of houses to another ph and neutral and then another similar number of houses to the remaining ph and neutral. And as you can plug in any number ( within limits ) of single phase motors to your houses' General Purpose Outlets you can see why i said you can use just one ph.

I think that you can work out the answer you seek from the above.