How to do it: run a 3 phase motor on single phase supply. part 1

How to convert the wiring to run a three phase motor on single phase supply using capacitors and a delta motor wiring.
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Info from Electric Motors, workshop practice No 16, by Jim Cox. ISBN 0 85242 914 2. To follow all 7 parts of this series there is a playlist or just work your way though and follow the end screen links to the next video. Cheers

[@rtron2012]

love the calm and the passion of this man i would like to have him as neighbor to take coffie and talk a lot with, in serene evenings in his lab !!!!

[@allthings2allmen]

My 80yr old dad just passed in November of '23. He had worked for Harrison Radiator Division of GM for 40+ yrs. He had spent most of that time as a boiler code welder. When he retired he always wanted to set up a metal working shop here in our barn with 3 phase. Well that never happened. He was able to purchase some things from the plant where he spent the last 10 years because Delphi bought out Harrison and was closing it down. One of these 'goodies was a large fan which I believe has a 3hp motor. It was wired for 3 phase, my dad didn't know how to convert it, so it has just been sitting in our barn for 20yrs. I saw your video when it was fairly new, and shared it with my dad who got excited. The next thing we knew we were too busy to get into it. I felt like it was a carrot just dangling in front of me, but only inches from my grasp. Well, now I have a bit more time, so I'm studying up with all of your wonderful videos. I will be paying very careful attention be assured. Thanks again for sharing your great insight & resources Andy!

[@TheInfoworks]

Thanks for your heart felt message, it make me realise the relief that I took the videos of Uncle Harold in his workshop, when I had the chance, cheers

[@allthings2allmen]

@@TheInfoworks Yes sir absolutely! I do appreciate you immensely. years go by and I think about watching your videos. I have watch a vast number since too, mind you. I told my mother that you made pineapple pudding (we call cake). We've also made one quite similar over the years since I was a little boy. We call it Pineapple upside-down cake. It's not a fancy dessert, & is very simple to prepare, but It really is quite tasty! I say some of the simplest things are the best! Well, once again Andy my friend thank you for sharing your knowledge with humble runts like me. Bless you!

[@pignatari48]

In Brazil, where I live, there was a technician who asked good money to do this trick. Thanks for the videos.

[@pleaseyourselfsir]

Wow!... Brilliant work Sir... I am an electronics novice... and I wanted to do something exactly like this 3 years ago whilst on a holiday!!! Thank You so much... will be watching the second episode shortly!... Keep up the GREAT WORK!!!!

[@saudiarabia9060]

thanks sir andy, you help me a lot with my problem. its done now. its been almost a year now since I have this problem. thanks again sir andy and more power to you. by the way I am a Filipino OFW from Saudi Arabia.

[@TheInfoworks]

Thanks for the comment and appreciation. cheers, Andy

[@Rayram555]

I enjoyed your lecture. Hands on insruction beats any theory. Thank You

[@TheInfoworks]

Thanks for your appreciation. My books are available from the Centre for Alternative Technology (CAT), cheers

[@stockloc]

I've been learning about Capacitor Start motors for years but I could never understand how they worked until this video. THANKS ALOT BUDDY!

[@robinstokes5179]

Invaluable, simple presentation for the hands-on user. Brilliant. Thanks Andy.

[@TheInfoworks]

Thanks for the appreciation. It's all open source learning. I hope you get time to watch the other 5 parts of this series. Have you subscribed? Cheers, Andy

[@philbagley536]

Iam an industrial maintenance technician I think ur videos kick ass thank you for taking the time ur great

[@TheInfoworks]

Thanks for your appreciation, I have an eclectic mix of subjects on my channel so if you are interested you may wish to subscribe. Cheers, Andy

[@philbagley536]

Yes sir I will thx . ..and thx for putting this on line to be honest 2yrs ago I bs my way into a master tech. Job fake it till you make it worked for a while but now I gotta program HMS and plc and no time for school any suggestions

[@TheInfoworks]

I was having a bit of trouble with your text speak, but you cannot beat any form of education and training, So go for it, so you can work from a level of confidence and clarity in your own skills. Be a craftsman and impecable in what ever you do. Cheers

[@robertthomas4633]

This was very helpful for someone just starting in the HVAC field.Helped me to understand single vs three phase and how it affects a motor.Thanks again

[@TheInfoworks]

Hi, have you seen all 6 videos and subscribed? Cheers

[@TheInfoworks]

Thanks for the info. I find it very useful and have been using this technique for years.

[@kazykamakaze131]

I would like to extend my thanks!( I don't comment or thank much on youtube at all and you are my first) I've rewired 2 machine now, an industrial power hacksaw and an industrial air compressor(both 3 phase) and want to seriously thank you for your effort of explaining things in this video. You've not only saved me money but also taught me something I didn't know. Seriously you are a diamond in the rough channel and I honestly believe you have a vast amount of knowledge that a lot of future generations men must soak up. Thanks!

[@TheInfoworks]

HI, you did well with the compressor as the starting torque can be difficult. I have added links to the 3 phase playlist in each of the videos. Have you seen part 7? subscribed? cheers

[@kenee2362]

Fantastic information you have provided! thank you very much. To me you have provided layman's terms of circuit explanation and do's and don't's Thank you for your time and efforts. Cheers my friend!

[@TheInfoworks]

Thanks for the appreciation, cheers

[@markbatten5178]

Outstanding explanation sir! Best I have ever heard bar none and now I feel a much better grasp of the concepts involved. Thank you!!

[@TheInfoworks]

Mark, thanks for the appreciation, cheers, Andy

[@edammasteroffish]

Good video, thanks for the info. Now have my 1/2 hp pillar drill motor running well. Used a 10uF capacitor, not sure on the maths but it seems to work well after running for a good hours test.

[@TheInfoworks]

Adam, thanks for the update, pleased it all worked out, see part 7, Subscribed? Cheers, Andy

[@LongIslandEddie]

Thank you for a great lesson on phase conversion, mate! Certainly know your stuff. I'm going to turn my monitor upside down (4:38), to reverse the polarity! I certainly do appreciate you lesson, my knowledge is expanding, thanks to you, Andy. Have a happy holiday season.

[@TheInfoworks]

Thanks for your encouragement and appreciation. Andy

[@platano1742]

Well, I do appreciate your video....I just want to give credit to Hector Perez and all the other people who have been working on this project for years. I have the rotoverter attached to a generator, and I use it every day to charge my battery bank..I'm working on improvements.

[@TheInfoworks]

Hi. Thanks for your appreciation. Follow your interests and ask all those questions. Once you are interested in a subject then the rest is easy. If you are keen then you can do anything you want. All the best.

[@MrBaldypete1]

Sir, your video has helped me immensely! Looking at the diagrams in the big green book is one thing... This is amazing! Thank you ever so much! :D

[@TheInfoworks]

Thanks for the appreciation, and of course the books are equally down to earth. Cheers, Andy

[@DumbThumbsFPV]

This is an interesting video. I rewind motors for a living. A couple of issues I see here. 1. I can see people single phasing their motors and burning up the winding. 2. I can see them popping off capacitors pretty much everything you warned about. 3. i can see people not understanding that start up amperage is more than the run amps and they will keep popping off breakers or burning up the lamp cord they hooked the motor up to. The three safest methods are 1. static converter and lose about 30% hp (pretty much what your showing here but can be bought and hooked up by .. well somebody with above average mind (USA standards) 2. Roto phase and get 100% hp but you have to size it right 10hp rotor phase for a 5hp motor 3. Add a phase. Once again you have to size it right and you also have to adjust the third leg under load by unhooking or hooking up capacitors that could lead to death from the average guy here in the states. We had one of these last summer in fact. Great video but at least here in the state I see death from "handy men"

[@TheInfoworks]

Thanks for your observations and I agree with them. I see this method as a cheap and cheerful method of running low power 3 phase motors only. I think the "average mind" is not only pertinent to the US as I have had questions about 3 phase welders and heaters. Cheers

[@jjohnson67sg]

thx Andy! you are funny and a great educator. Liked It!

[@TheInfoworks]

JImmy, thanks for the comment, hope you have subscribed, cheers

[@TheInfoworks]

I have never messed with these motors, but there are some you tube videos describing the wiring. They are high speed to get the power and then a large belt speed reduction to get the torque. Hope you get the project sorted.

[@lilianfoody]

Hi Andy thanks for the videos, now I know how to run a three phase motor on 220 supply, great tutorial first class.

[@TheInfoworks]

Tommy, thanks for the appreciation. This is only for motors up to about 2 HP. Have you subscribed? Cheers, Andy

[@harryocampo3418]

+Andy Reynolds nice tutorial sir! maybe i'll try that to 3phase submersible motor

[@chanakajayawardana8937]

Very nice video Andy. Much appreciate this. Today I ran 3 Phase 1 HP motor using your instructions.

[@TheInfoworks]

Self reliance improved, well done, subscribed? cheers, Andy

[@chanakajayawardana8937]

Yes I did..

[@TheInfoworks]

This is a non commercial channel, so I do not make money from advertising. Please click the "like" button whenever you are watching any of my videos. Cheers

[@TheInfoworks]

It great news that people are out there doing things, and being interested rather than just participating in the consumer race to oblivion. Thanks for your comment, and yes the history of invention is littered with research ignored or credit given is the wrong person. Harrison, Patterson, Nicholson, and a huge list of others.

[@TheInfoworks]

Thanks for your appreciation; I would be useful to watch all 6 videos in this series. You may wish to subscribe to get email updates of new videos.

[@aseyhassan]

Thank you so much for your wonderful channel and useful

[@TheInfoworks]

Thanks for your question. This turned out to be a 6 part series, see part 2 for a continuation.

[@TheInfoworks]

Hi. How many wires are showing inside the motor box? Look at part 4 of this series to give you some clues. See if you can find 6 wires. There is a video by pooroldchap on this but the capacitors needed are much higher voltage. See how you get on and refer back as a work in progress. You may wish to subscribe to get emails of future uploaded videos.

[@murangom]

Am really glad to see this,keep up your good work

[@scottcaine3362]

You my friend are a genius!!! Thank you. You laid this out perfectly!!

[@TheInfoworks]

Thanks for the appreciation, check out my recent upload on global warming and flooding. Cheers, Andy. Subscribed?

[@scottcaine3362]

Mr.Reynolds I am subscribed. I am currently having a issue with the motor heating up very quickly. If I did my math right my motor requires .81 micro farad capacitance. However my motor is still heating up. I have a AHV 2-42-P-10 0-250 Volt, 2 Amp-3 phase motor I am trying to run it on single phase 110 Volt. any suggestions? Thanks in Advance..

[@TheInfoworks]

Sounds like you capacitor value is too high. Check the voltage between the supply lines and the capacitor / motor connection. It should be at or just below supply voltage. I suspect currently it will be much higher. Cheers.

[@DonatoThomas]

I converted a 3 phase motor to single phase use for a friend. Now you got me wondering if it was wired delta or wye. There was plenty of power, so I'm guessing we were using two of the three windings. I used a potential relay from an air conditioning compressor to de-activate the start cap. After the success, I realized I could have used a regular relay hooked to the line voltage with N.C. contacts for the cap. When the motor got up to speed, and the voltage returned, the relay dropped the cap.

[@narawadeesaisud7550]

Many thanks. We received 380v 3 phase motors from china on small lab equipment. Bugger!

[@TheInfoworks]

I hope you will enjoy working this out. Cheers

[@narawadeesaisud7550]

Andy, my husband and I are in the jungle in Laos. We purchased second hand capacitors from a junk dealer but are 450v umf. Will these work? We found a 250v 500umf capacitor and it worked. The motor runs mini ball crushing mills. Any help you can give is very much appreciated. From Nara and Dave

[@TheInfoworks]

HI. As long as the capacitor voltage is higher than the supply voltage, all OK. The 450v one is fine. It is the Uf (micro farads) measuremant of capacitance that is important. If the capacitance is too high then the voltage on the 3rd terminal will be too high and motor will get hot or fail. For a half Hp motor the cap should be about 30Uf, if I read you message right yours seem to be too high. Check the voltage with a multi meter between supply and the 3rd connection. Hope that helps. Can you promote my books out there? there is a very good discount direct from the publisher. Cheers Andy

[@narawadeesaisud7550]

Dear Andy, the motors are 2.2 and 2.5hp. The machines arw the size of a home cement mixer. Please give me a link to your books. Your videos are the most practical and helpful instructional DIY videos I've ever come across. I will put on a switch capacitor as per video 3 or 4. Many thanks.

[@TheInfoworks]

HI. About 100 Uf for the run cap and something like 200 UF for the start cap but this is not so critical. I have put a link in the description of part 2 to the list of LILI publications, many of which you may find interesting. LILI is a not for profit organisation, and so am I. Cheers, Andy

[@alfredtambunan8961]

Thank you so much. I am enlightened!

[@TheInfoworks]

Thanks for the message, Subscribed? Cheers, Andy

[@somnathdey7437]

Thank You Sir, its clear my lots of confusions

[@chuckgilbert2035]

This helps. However I am going to have to watch this more then a few times for it to sink in. Thanks, subscribed to learn more about this to build a rotary phase converter.

[@TheInfoworks]

Hi, yes the use of a no load pilot motor stabilises the third phase, I think I covered this towards the end of the series, cheers

[@mrlittlemouse1]

​@@TheInfoworkshi could this be done with my 1968 3phase 3hp motor on my lathe as my new landlord won't let me wire into the electric supply for a phase converter. I.e what capacitor size would I need to get it run correctly. Thanks Michael

[@TheInfoworks]

Hi, you would need a pilot motor and 3 hp would draw plenty of current when starting, cheers @@mrlittlemouse1

[@mrlittlemouse1]

@@TheInfoworks hi thanks how big would you go with the pilot motor thanks Michael I'll subscribe now

[@TheInfoworks]

I'd say something like 1 HP, you will probably have to take power from several outlets, cheers @@mrlittlemouse1

[@RODALCO2007]

Good explanation.

[@TheInfoworks]

Cheers

[@TheInfoworks]

Hi. Yes 1 Hp is 735 watts in theory, but when you take into account the losses in a motor, then the rule of thumb of 4 amps at 240v to the horsepower works as a guide to see if things are working correctly. I've just looked at my bench grinder 370 watt motor draws 2 amps and that is a half horsepower motor. It's all about the practicalities, thanks for your comment I'm sure it helps many other watchers to understand.

[@jegvil200570]

thanke you for this video. Very informative, very good to see the theory turned into real life.

[@TheInfoworks]

Thanks for the comment. Subscribed? Cheers, Andy

[@PaulSmith-le1jl]

Hi andy just subscribed I am going to start working on a 3phase garage lift motor to hopefully run it on single phase thanks for the video fingers crossed I get going once again thanks

[@TheInfoworks]

Hi. Garage lifts can be tricky, depends if they are chain or hydraulic. You might have to use a pilot motor to stabilise the third phase before trying to start the lift. Good luck, cheers

[@PaulSmith-le1jl]

Thanks for reply its hydraulic driven can you explain pilot motor as I am not at all electronically minded

[@TheInfoworks]

What you do is get a reasonably sized 3 phase motor and do the conversion. When this is running without a load it stabilises the 3 phase. If you wire your lift motor to the pilot motor connections through a switch then you have much better starting, so the pilot motor is always started first. Hope that makes sense, cheers

[@hmarillejla7]

OOps was too much in a hurry! An explanation followed. Thanks.

[@TheInfoworks]

Thanks for your comment. You are correct in assuming 30uf value is needed as a run capacitor per motor Hp, but this is a start point and the voltages must be checked to prevent over voltage of the coils.

[@TheInfoworks]

I have never got my head around power factors, something to do with current lagging voltage. But as a general way of thinking about it, the resistance of a motor coil should be suitable for the voltage. Too high a resistance and less current will flow and so the motor will be less powerful. I just find that for everyday home workshop this method works sufficiently well and it is inexpensive. Thanks for your interest. I will upload part 6 when it's finished.

[@fanwoodwatcher3873]

The dux guts is a tank circuit invoking power factor aka phase shift expressed as an angle or percentage in single phase transformed to a rotation direction. 3 phase dual voltage motors have 9 wires to connect properly. They run, or they hum, if they don't know the words, or the connection is faulty. Then they burn, while you learn, and I earn. Motors and condensing unit controls are often filled with mouse nests- a major source of fur for automobile ceilings, and work for guess who. 3 blind mice

[@alext9067]

What a great teacher this guy is. I suspect he didn't get all this knowledge from just browsing thru that book. He's hiding a brain somewhere on his person. I'm subscribing. Oh and thanks Andy.

[@jayantyemul2493]

Nice work sir

[@TheInfoworks]

Thanks, this works for me on small machine tools, cheers

[@TheInfoworks]

Thanks for your appreciation.

[@gilmeneguia4424]

nice video,,i understand sir..

[@TheInfoworks]

Thanks for your enthusiasm.

[@imoza5268]

this video is an interesting to me,for example,after rewinding coil motor and test the motor,if voltage supply single phase 240 V,you can test the motor with supply single phase 240 V.it is very simple and easy..

[@TheInfoworks]

Thanks for the comment. It is important to test the voltage across the capacitors when the motor is running. This test gives a good indication if the cap size is correct. Cheers

[@patrickmulholland1840]

great video thanks

[@TheInfoworks]

Cheers, Just for small motors.

[@itsyou2323]

Thaks mr andy, am from indonesia.

[@marpuno8412]

Great,thank you for sharing your khowledge, More power.

[@TheInfoworks]

Thanks for the appreciation, subscribed? Cheers, Andy

[@user-uv8tc3yu7y]

Your video is very good information.You are converting single phase into a three phase by using the capacitors due to which the angle between the 2 windings is made between the voltages and currents.An induction motor single phase will never be a self starting .It requires angle differences between 2 or 3 windings. By using capacitors you get the 3 phase supply . It is essentially used in fans, mixers, blowers, drillers.You can use inductors to achieve phase angle differences . A ceiling fan motor which uses single phase supply has a main and an auxiliary winding which is nothing but a 2 phase split phase induction motor.

[@asadiqbal87]

thanks sir very good work

[@TheInfoworks]

Cheers

[@howishunternotinprison5614]

lol dololly i work with some of those...great video

[@jamesharper6190]

Thanks your good man, you've made me happy. More of the same please.

[@TheInfoworks]

James, thanks for the comment, check out my recent solar electrics, battery shed wiring, and uncle Harold's workshop videos. Have you subscribed? your channel shows no activity. Cheers, Andy

[@joshuadavies7335]

Thank's i'll check and get back to you thanks JD

[@Bianchi77]

Nice video, thanks for sharing it with us, well done :)

[@TheInfoworks]

Thanks, hope you subscribed, cheers

[@MsJerryrig]

great vid thanks for the knowledge

[@TheInfoworks]

Thanks for the comment, Andy

[@TheInfoworks]

Thanks for your appreciation. It's all about information sharing and encouraging self reliance.

[@dalsenov]

Thank you sir! Very useful video!

[@TheInfoworks]

Cheers, I hope you enjoy many of my other videos on self reliance.

[@archiedeguzman9272]

Thanks you sir for a great explanation.

[@TheInfoworks]

Thanks for your appreciation. Andy

[@TheInfoworks]

Hi. Further to your comment. You are dead right that the conversion drops a phase, so the motor is running on 2 phases. One directly from the 240v and another through the capacitor. As 3 phase motors are generally used continuously and are heavy duty, then in workshop conditions 60% power is more than adequate. The high torque situations can be a problem where the large start capacitor induces a high voltage, but this is switched off once the motor is up to speed. Thanks for your contribution

[@naokikashima9349]

Brilliant video! Thank you for posting, I'm a new subscriber to yours.

[@MrRay1388]

U R the best man, Thanks :)

[@kumbuwa]

Thanks my friend for help

[@TheInfoworks]

Hi. This is about converting the motor to run on a supply provided from 2 cables, live and neutral, rather than converting your supply to 3 phase. I suggest you watch all 5 parts and then get back to me if you have any further questions. Do not use capacitors that are too large. Do the experiments and measure the capacitor voltage. Hope this helps.

[@davsky7280]

thanks for the informative video..

[@TheInfoworks]

Cheers

[@geojor]

thanks for sharing...

[@mmmodcool]

Its very useful information. Thank you very much :)

[@TheInfoworks]

Cheers

[@mmmodcool]

:)

[@izzzzzz6]

great disclaimer :D

[@TheInfoworks]

Thanks for your appreciation. It's all about encouraging self reliance.

[@rickdixon3941]

Andy: Thanks for your videos on 3phase to single phase conversions. I expect on my 10HP 3phase motor that the amps on the remaining two legs to the motor will reflect the higher amperage resultant from the 240 V rating. I am sizing circuit breakers assuming such. Just a note: My application is the motor is being oversped by a 13' overshoot waterwheel into the slip speed of the motor. The producing current will feed the house. I'll let you know how its going. Thx. Rick

[@TheInfoworks]

Rick. We have done experiments with a 10 foot waterwheel. You can see the results in the 3 videos on my channel. We used a high voltage PM wind turbine generator and an SMA solar grid tie, both second hand. This might help you. Cheers, Andy

[@HiTechDiver]

Interesting difference in terminology. What you refer to as "Star" my US Navy electronics classes referred to as "Wye" (Delta or Wye connection) or at least they used to in 1980.

[@TheInfoworks]

Hi, yes I've heard of that, wye after the letter Y, having 3 terminals. Some vievers have attempted to tell me off due to termiality issues but as you say things have different names in the various parts of the world. Thanks for the comment, cheers

[@gravelydon7072]

Wye has always been the way it was described until recently. And for Andy, Wye can also have 4 terminals as you can tap the center of it for a lower voltage. Many Alternators used in industry can be wired in either style. If you have a heavy need for 120 Volts you can wire a 12 wire alternator to provide 208/120Volts and get better output than if you wired it for 240/120 3 phase.

[@TheInfoworks]

Yes, that's true. Look under pooroldchap, and he talks about using star. I believe the capacitors may need to be of a higher voltage. The resistance of the coils will be greater and so less current will flow. Interesting as to if there is any benefit with either method. Thanks for your interest and comment.

[@TheInfoworks]

Thanks for your comment and appreciation.

[@TheInfoworks]

Hi, I can see the problem. With star there are 2 sets of motor coils in series. This doubles the resistance and so with a 230v supply it reduces the current flow. This is why we use delta to match coils and supply. I suggest you make a wiring diagram of what you have, and then follow this series of videos to wire the motor for delta. You may need to experiment with cap values; it's in the videos. Remember to check the cap voltage with the motor running. Let's hear how you get on.

[@platano1742]

This is called "Rotoverter" It was invented in the 70s-80s-90s and publicly disclosed in 1999 by Hector Perez Torres from Puerto Rico

[@TheSummit396]

i like your video good teacher!

[@TheInfoworks]

Thanks for the feedback.

[@carmelpule6954]

Considering the three- sets of coils in a three-phase motor having both "electrical degrees phase shifting " and "mechanical degrees'' location on the stator then if a DC is applied to one phase it will magnetize the stator in a particular polarity and location. If the other two coils are added in series and supplied with DC voltage then their magnetic field will be opposite to the first coil. If the latter two series coils are subtracted and fed with a DC, then their resultant magnetic field will be at the right angle to that of the first coil. This means that one coil could represent one phase, while the subtraction of the other two coils could represent the starting quadrature winding of a conventional single phase motor. So considering the delta connection, one could apply the single-phase supply directly to one coil and through "series, capacitor" feed the other two coils in series but connected in a subtraction manner to the single-phase supply. This would form a single phase motor with running and starting/ running winding. The physical location of the resultant magnetic field would be in quadrature space-wise while the addition of a capacitor would produce the starting time delay or running the second phase to run the motor.

[@TheInfoworks]

Hi. Thanks for your question and interest. Part 4 shows what happens if you use too high a capacitance on the run capacitor, it produces a very high voltage on the associated coil and causes the coil to over heat. Using a capacitor value that gives about 230v is ideal, and if the motor will not start use a start capacitor and switch as shown in part 5.

[@wanabear5716]

Nice :) thank you !!

[@mseriesmusicseries276]

Very well

[@TheInfoworks]

Interesting. I would say that the new caps are less tolerant to over voltage. If you can get some rated for higher voltage this should sort the problem. Stay with the same capacitance but go for something like 380 volts or even higher. It's the over volts that kills them. Hope this helps.

[@gragor11]

Hi. In your very well helpful video you demonstrated what you were doing to change the direction of rotation in a delta connected motor. I am assuming that a star connected motor works the same way as far as the capacitor connections are concerned. I just hooked up a used vehicle hoist w/ a 3 phase motor connected to a phase converter w/ Parallel Capacitors - WYN SCM05 . The lift had been lying on its side and there was lots of leaked hydraulic fluids about. The motor is a 3 phase / 3hp Leeson motor 9.2a @ 230v rated w/ 6 leads. Your diagrams helped me recognize the connection as star. Yea video. The available voltage is 249v single phase. Fairly high. Amperage draw should be less. I hooked up the L1 and L2 wires from the phase converter terminal strip to a 2p 15 amp breaker leaving all connections as they were after cleaning out the oil and tightening the loose connections and replacing the wire from #14 to #12. With 2 clip on ammeters attached to each lead, one set for peak and the other set to run I bumped the motor by lifting the control lever on the vehicle hoist which was in the down position. The motor engaged when the controller was lifted but the lift did not rise. The motor ran at 10.3a drawing 56a peak on start. Made a bit of a grinding noise. Thinking that perhaps the motor was running in the wrong direction I changed the leads at the breaker. Bumped the motor. Reading were the same and grinding noise was gone. Drive gear disengaged (?) In the Phase Converter box were 2 caps, a indicator lamp, a black box and a terminal strip wired as follows. L1 is connected to lead T1 (Rd) L2 is connected to lead T2 (Wt) and Caps via black box w/ switch in it. T2 (Wt) is connected to T3 (Bk) via parallel capacitors as noted above. T4 T5 T6 bolted. The motor ran at 10.3a drawing 56a peak on start. Lift doesn't rise. I was expecting a higher load. A 3 hp single phase motor would draw around 17 amps. The motor runs on when drive lever is released. Owner said the motor stopped instantly when the lever was released when last operated at place of purchase. Might indicate that the motor mechanism is not engaging the lift drive and the motor is idling. A loaded motor would draw more power and stop when power was disengaged. As this motor is a hydraulic pump motor there is no way to check rotation that I can see at the motor. Motor does drive a chain though. ( Perhaps I can see the drive wheel turning.) I was worried about killing the motor so I aborted the test at first. Later we ran the motor for about a minute to see if the hydraulics would pump up. No cigar. There would have to be a limit switch killing the lift at both ends of travel. If the motor would have been driving the lift in the wrong direction (Down instead of Up) the limit switch would be engaged stopping lift from moving. There could also be an air bubble in the hydraulic system as it leaked so badly which would not allow the lift to operate even if the lift were operating in the correct direction. Reservoir is at the correct fill height. So I decided to switch the black and red motor leads at the terminal block of the Phase Converter (Capacitors) wanting to reverse the rotation of the motor to test the drive against the lower limit switch idea. (Motor rotating in the wrong direction). So this is what I did to reverse the motor. Did I do it correctly? Switched leads T1 (Rd) and T3 (Bk) on terminal block. L1 is connected to lead T3 (Bk) L2 is connected to lead T2 (Wt) and Cap via black box w/ switch in it. T2 (Wt) and T1 (Red) are common to capacitors. T4 T5 T6 bolted. Motor runs at 10.3a drawing 56a peak on start. Lift doesn't rise. I'm thinking that perhaps the motor is not engaging the lifting mechanism but I would like to know that I did manage to switch the motor leads correctly to reverse the direction of travel. Any ideas? Did I miss anything? If nothing else writing this out allowed me to analyse what I was doing. Drawing out the cct helped as well.

[@TheInfoworks]

HI, so you are using a phase converter to change single to three phase. Vehicle lifts can be tricky. From memory the way to change rotation direction is to change two motor wires over. It is the capacitor that detemines the direction. A pilot motor helps to stabilise the third phase. If you are using a contactor the coil needs to be across the true phases, not the induced one, otherwise the contactor will not work properly. Hope that helps, Cheers

[@gragor11]

The freewheeling of the motor after the control lever was dropped was the key to the problem that allowed the millwright to diagnose the problem over the phone. The hydraulic motor had become uncoupled from the electric motor during the move. Too bad the coupling was inside the hydraulic fluid tank . . . Once it was tapped the drive line fell together and the lift was in operation. As for telling if the motor was operating in the correct direction or not (it was) apparently the hydraulic pump will draw down the fluid when rotation correct and spit bubbles when it's not. That's how the millwright tells rotation. He also said it does't work all the time. As for the loading. The motor runs at about 10.6 amps and peak inrush in 60 amps. Perhaps another cap might help bring down this start voltage. With the voltage being so high to begin with (249v) I think that helps reduce the run current of the motor overall. As for rotation direction I saw a diagram on a different web page that showed how to determine the direction of rotation by where the cap was located in relation to the driven leads L1 and L2. I used those diagrams to determine that I had swapped the motor leads correctly to effect a rotation direction reversal. Here's the link to those rotational diagrams. www.electricneutron.com/wp-content/uploads/2014/12/forward-rotation-capacitor.jpg www.electricneutron.com/wp-content/uploads/2014/12/reverse-rotation-capacitor.jpg It threw me for a bit of a loop when one was delta and the other one was Wye but I did get the concept of the moving capacitor indicates rotational thing and I worked mine out by just printing the Wye diagram out twice and reading one backwards through the paper to reverse the image for the opposite rotation. So that is what the second motor is used for. I've seen that second motor trick demonstrated but I never understood what it was doing. I though it provided the third phase angle. So you are saying that a pilot motor would be used in addition to the caps to stabilize the cct. Thanks again for posting your great video. It was very helpful in identify what I was going to be seeing. Made me feel much more confident about the job even though I've never installed one before.

[@skbakanov]

Even if you do bump a cap. To start the rotation, the motor still runs at 1/3 What you do is use a neutral as a center tap to your star config and 120 to one coil with other 120 to other coil. And use the 3D point of a star to bump cap. To

[@johnnysandkly7899]

thx Sir Very useful Video's

[@TheInfoworks]

Cheers.

[@TheInfoworks]

Thanks for your comment and interest. To get max power out of a 3 phase motor on single phase there needs to a be capacitor from both the neutral and the live to the 3rd connection. A start cap is definitely needed to set the rotation direction. On automatic start this would need some extra current related switching (switching off as the current reduces as the motor runs up to speed.).

[@FABSTERRHQ]

thanks you, this is great for me! will try to use it for my 9kW heater!! I have a transformator, will see if it kan handle 9kW..

[@TheInfoworks]

Hi. Try it, but bear in mind that 9Kw at 240v is 32 amps. Cheers, Andy

[@TheInfoworks]

Hi. There's your problem. A 5 hp motor will draw at least 4 amps per horsepower. So there is your 20 amps. It all depends on if the motor has a free start or is starting against a resistance. I suggest, if you have not already watched all 5 parts, then do so. The use of a start capacitor may well help you, but your supply will need to be up to the start current demands. Hope that helps.

[@TheInfoworks]

You can contact me through this channel or the forum on the LILI website at lowimpact dot com. Thanks for the interest.

[@timothymunday1338]

give that man a cookie

[@aridosky]

Wow...... GREAT

[@saurabhawasthi4318]

awesome

[@TheInfoworks]

Thanks for your comment. There are 5 parts, I hope you enjoy them all. The books are in a similar practically based (I've done it so I know it works) style.

[@TheInfoworks]

Just to clarify, I have used 240v standard domestic supply of single phase for this motor in delta. That is a live and neutral.

[@TheInfoworks]

Hi. Thanks for the interest. The method uses the coils in star configuration. This way there is greater electrical resistance across the coils. The capacitors need to be suitable for a higher voltage 500v. pooroldchap shows this method on his channel, but basically it is just the same but with no wiring changes. Check out his channel and see what you think.

[@jeremyvoshage2410]

"prevention of serious brain fade" Love It!

[@TheInfoworks]

Thanks for the appreciation. you may be interested in the new solar power series. have you subscribed? Cheers, Andy

[@altheaviray8500]

how to convert ide 44 pin to 40 pin

[@altheaviray8500]

how to convert ide 44 pin to 40 pin

[@TheInfoworks]

Hi. You need to watch all six parts to fully understand. The capacitors are very important to delay the phase.