Hi everyone, Just a kind request to the viewers and professionals who can afford to sponsor or fund this channel, mainly for the benefit of the viewers all over the world.🌎🗺✈ It will also definitely be a motivation for me, to continue this channel with good explanatory educational videos for all of you. You can contribute by being a Sponsor of this channel using the following link, patreon.com/ElectroAcademy I made this request six months ago, but no one has come forward to help this channel yet.🤔💔 I know, many have become patrons of entertainment channels mainly, but look forward to seeing at least some supporters who understand the value of an educational channel like this. If you are not willing to visit a particular website for help, please contact me via email, sudarshan78@gmail.com Your kind gesture will be most welcome..!❤❤❤ Thanks and Best regards. Sudarshan, Creator of Electro Academy Channel.

This was the BEST presentation! With the windings shown it is easy to remember what one is actually doing. Thank you so much ❤❤

This was the most straightforward and well explained and demonstrated example I have seen on YT! Great work, thanks!

Sir your explanation way so simple to understand thank you ji 🙏

I ran a three phase motor off single phase 220 volt AC (actually 250 volt) for nearly thirty years with a ROTORY contactor that was 1930's vintage, just like the 230 volt 3-phase Westinghouse motor on the Quincy 7 1/2 HP (? maybe 10 HP) two-stage three-cylinder air compressor with a 90 or 110 gallon ASTME tank I got used from a filling station, and sold a few years ago for twenty times what I paid for it to a fiberglas shop, and the buyer thought he STOLE it compared to a new compressor! He'd have to have bought an EPA "compliant" screw compressor new and HAD it installed. HE could install my old Quincy outside in a shed legally. I had never connected the water intercooler, but he did and it was fine. Mine wasn't a delta three-phase, it was a "star" three phase. I DID have to replace the "RUN" capacitor which bulged and leaked from age-a $120 item and while I was into it I replaced the three Vee-belts that were twice my age. It was an induction run repulsion motor that made the electric meter "JERK" violently when each pole of the motor passed, but it will probably run until 2134 when I think it was built in 1934! Yes, a modern Toshiba or Baldor could save some electricity, at the expense of motor-life. You don't get anything for free in life. I used to pump it up to 175 psi and shut it down and "run off the tank" all evening, and sometimes the next day! Oh, yeah, I forgot I had to re-build the second stage compressor early on-the poppet valves stuck and snapped, but I think it was about $50 to fix it from Quincy Parts, and no harder to fix than a lawnmower.

Superb and fantastic explanation and can understand very easily. Thank you very much

Thank You this is very useful knowledge for our needs in the countryside

I use that basic circuit on my milling machine. What is shown won't have much starting torque, and you'll need a start capacitor of up to 8 times the value of that run one momentarily connected in parallel with it. Also don't expect to get the rated output of the motor, because if you monitor the actual voltage across each phase, only the one between phase and neutral will be correct. One of the others will be higher, and the third lower, and the values will vary, depending on the load that is being driven. The start capacitor has the maximum number of starts/hour written on it. Exceeding that will produce magic smoke, and the necessity for a trip to the capacitor shop. Mine doesn't use that fancy relay, and uses old power factor correction capacitors for the run function.

From 3'54" rubbish - the overload relay does not detect zero current through T3 or anywhere else. The relay is designed to trip when all 3 lines are overloaded. When marginal overcurrent flows only through 2 lines, the thermal conditions for tripping are not satisfied and the relay will not trip. This is why, when using a 3 pole overload relay on a single phase motor, the load current must be taken through all 3 poles as illustrated.

I was once at a shop that a guy had built and setup but only had 220 single phase power available because it was in a residential area. He was able to start and run 3 phase motors on 220 without a capacitor. It's a bit spooky but he would wrap a rope around the pulley and pull start the motor. Once it's running over a certain RPM it will run on 220 single/split phase so pulling the rope like starting a lawn mower would get the RPM up and then throwing the breaker once it was spinning would get it up to about full speed. Also once a single motor was running he was able to take the 3rd leg and use that to start other electrical motors that were 3 phase without using the pull start method. So he had multiple 3 phase motors setup on equipment with a line that linked the 3rd leg of each one together and starting up the shop from cold was a process of starting one motor with a rope and then just throwing the switch on anything else he wanted to run. An added bit of information that I can not confirm was that he would often leave them running for weeks on end even if he wasn't doing anything and his power bill was next to nothing because of the setup. From what I was told the power company came out to check things as his bills were often abnormally low and they thought he was stealing power before the meter somehow. They pulled the meter and it all shut off however. The theory was that because he had a residential meter it wasn't able to handle what he was doing with it and there was some sort of odd ripple feedback or something of that nature which prevented the meter from properly reading the power use because of the 3 phase setup where the 3rd leg was connected between multiple motors. Again I can not confirm this but I don't have any reason to think he was lying about it. I am also doubting that modern meters would have the same issues but the power company opted not to change it because they would have had a major cost to them with little gained return.

Good Job! I learned something today!

Some 3 phase motors use star/delta starters to achieve soft start and to reduce starting current.

fantastic, the presentation is really super.

Thank you!

I just use a cheap small single phase motor with a coupler to a larger 3 phase motor as a converter…. Avoids huge current surges and voltage drops. Most power tools can tolerate slight power factor errors

I subscribed your channel sir

Yes, correct, you can drive a 3-phase motor using a Capacitor like that. . . . BUT the value of the Capacitor will only be correct for one size of motor and also for only one specific speed or Power output on that motor.. . . These days, it would be better to get a VFD drive unit, which can change single-phase to 3-phase.

Thanks,have heard of it but never seen one.

so lovely

also works with split phase 120 volts AC = 240 volts between the two phases instead of the neutral wire.

Nice bro... Continue good work.. ❤❤

Great video, thanks. You can start a 3 phase motor connected as you describe by momentarily connecting a heavy wattage resistance (I forget the resistance value) across where you have your capacitor. The motor will run, and is generates the third phase at its unconnected terminal. You now have a rotary converter, and you csn connect a normal 3 phase motor and its control circuit to your rotary converter.

Yes, this will run as a splt phase motor, but only at a very reduced output.

Thankfully sir

Vfd is the way to go. You can make a small air compressor produce high volume of air. For air tools.

Sir thank you very much. I'm very interested

The problem is that the phase shift between two phases of the 3phase is 120 ° but between the red and the black it is 180 °. So it may turn but it is far from optimal.

Wow! I'd like to see that.

thank you and God bless you

What I miss are the control of the voltages on the motor terminals. These should be nearly equal across the three points with a running motor.

Excellent sir 5hp motor full load current 9 Amps Please tell me capacitor rating

this is in my exam on my 5th year in Electrical engineering!😂

And also shared your channel

👍✌️👌👌👌👌🤗

That's same as my old air compressor setup 😂

I have done this before, on a tyre-changing machine, but wouldn't recommend it unless there was no other option. If you can afford it, a small VSD running off the single-phase supply is a much nicer option.

Gone seem to be the days of swapping two live connections in order to get the motor rotating correctly. Is the single phase operation covered in the IEEE Regs?

👍

❤

How does this affect the motor efficiency? Do you need to increase the fuse and overload amp ratings?

Would it be better to use 2 phase or 1 line and neutral?

Nowadays you get a VFD that has single phase input and three phase output.

And watch the lights in the house diminish to nothing LMAO

It may turn, but try to use it.

I bought a digital phase converter

Only if the motor itself is running.

In this method, does it possible to continuous run a motor? If possible, what is the maximum motor power???

What capasitor i use in 3 phase motor to single phase 220v? 3 phase motor specs.. Y DELTA 346-480/200-280V. 1.40/2.45 A COS♤ 0.80 0.55KW. 3400. 1/min. 60hz

Traduzione in italiano?

Is it starter capacitor or run capacitor?

25hp motor tell me the capacitor rating. Sir

electric chair :-)

Add the start, stop button

Just buy a single phase to 3 phase VFD

I'm not even gonna watch this and tell you to use a phase converter to operate a 3ph motor with 1ph power.

This is apallingly misleading. I am an EE and have designed motor drives. What is the 3 ph voltage L-L? What is the single phase voltage L-N? How much power can you expect from the 3 ph motor? (not much!). How much starting torque, for a compressor, say (a common 3 ph application). Basically so simplistic as to be worthless and potentially dangerous. And why the speech synthesis? Struggled with microfarad!

This will not startup of 3-phase motor under load cheapest way of doing called a pony motor

All motors are three phase, the reason for capacitors.

Connecting single phase to a 3 phase motor. That motor will loose 30% of its efficiency.

Could you have possibly made this any more confusing?

Sorry but this concept is kind of nonsense, it wouldn't even turn over. Just use single phase motor, is more efficient. By the way you cannot start 3 phase motor without star delta switch unless you run it just with star connection with less power.

Fake

Can you help with diagram on how to connect 1 phase 240v motor with two capacitors and reverse?

What is the biggest size of motor can run single phase and you were saying 70 uf capacitor for 1kw so 3kw by 70 with be 210uf am I correct thanks please let me know