Three Phase Rotary Convertor Built Out Of Scrapped Materials
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- Опубликовано: 8 сен 2024
- Not a DIY. Not intended to be instructional beyond theory of operation. The focal point of the video is to show that not all scrap material is worthless. Every component used to build this functional little control box was destined to the salvage yard, discarded from construction projects and obtained during the demolition phase. Of course rotary convertors are available for purchase over the counter as are variable frequency drives and solid state motor controllers, but if you are a guy like me, nothing gives more satisfaction than building something out of nothing.
There's a lot to be said that couldn't be contained in such a short video so the content lacks a lot of pertinent detail. But anyone that has the capacity to obtain the components and build something similar will more than likely already be in command of those tidbits of thought. Electricity is one of the modern amenities that most people that use it should not be working on it. There are hidden dangers within every component. Shock hazard is real so if you do not have the knowledge or experience necessary, take my suggestion and go buy yourself a store bought machine on the order of one of the pre-mentioned components for successfully operating three phase machinery on single phase power. #shop, #3phase, #rotary
I know enough about electricty to know I shouldn't be messing with it.
I had an older electrician, that had experience with sugar mill maintenance, do all of my industrial wiring for my projects. I actually saw him do maintenance for a college electrical engineer's large refrigeration system (but electrical related) and when he made that electrican's repairs, the electrical engineer asked. "how did you do that?"
Lol...they were competitors for large projects in my area.....and the 'old guy' got about 75%+ of those projects.
Thanks for the video
Hahahahaha...good story about the old friend. I tell guys all the time that 85 to 90% of troubleshooting is electrical. So he was just just working well with in his element !!
hi there my friend Jeff does all that stuff , when we hooked up my new to me mill he just put a frec, drive on it , good show best to all john
A VFD is a great way to go. I have one on my mill and on the SIL's 3 ph lathe. Thanks for watching John.
Never heard it explain better. Thank you for sharing
Its a simple concept that works quite well. The good thing is I never have to buy parts. I used to have access to unlimited supply of used parts on demo'd equipment.
This is the coolest, im so glad i found your channel.
Cool !! Thanks for the cool comment !! There's a LOT of different stuff we work on here. You never know what's coming next. At least I don't. (-:
Much clearer explanation thank you...!
Thanks for the cool comment Chad. I wouldn't recommend anyone trying this unless they are proficient in electrical work though.
Good information! Thanks for sharing
Good Morning Jeff... I've been outta town a while. Thanks for watching....something different for a change isn't it.
My neighbor has a milling machine and 4 lathes. They all run off a rotory converter like you made.
Awesome !! The more you run off of one, the more balanced the third leg becomes too.
Very smart buddy you know you stuff for sure you lost me after good morning lol take care have a great week
Hahaha...that's ok Tom, I was just rambling and making it up as I went along.....LOL. Thanks for stopping by my friend. Have a great weekend !!
When a man understands 3 phase electricity....the world opens up
Well, I was trained as an 1141 electrician in '71 as a young Marine. Then the GI Bill put me through hvac training preparing me for the next almost 50 years as a service tech. So I've been working with and on 3 phase equipment from motors, to pumps to compressors and more for many, many years. I did spend some of the earlier years working in sheetmetal as well as in the service sector before spending the last 25 to 30 years almost strictly commercial service and DDC controls and piping. Retirement IS nice though. (-;
Hi my friend. Great explanation of how this works. I have watched the price for used motors going ever higher these days.I was going to do one for running a small saw mill. I guess that's on hold till we get our Country back,if ever. As always my friend I liked and shared. All my very best to all.
Hot dang Bobby, it'd take a big one to run a mill !! Of course a small circle mill might be fine or a bandsaw mill would be ok too. I used to get dozens of these three phase motors. Most salvaged from HVAC demolition projects.
@@tractorman4461 I was going to run a small circle mill. Had the seller picked out ,the motors and all. I just waited to late. Now shipping and the price of the parts would be about 8X more. Ah i will save my penny's and by the time I get enough It will cost 16X as much Haha. It's all good. All my very best.
@@tectalabyss hahahahaha....always looking on the bright side Bobby. LOL. I hate it when I don't buy something when I should and then when I get around to it, the price has changed or its GONE !!
I have no idea what you just did 😁. Cool video tractor man.
I just kick my brain in neutral and record what comes out...so sometimes I don't even know what I said either !! Thanks for the cool comment my friend.
Nice. I have worked on a couple of converters. We used to install some made by "Ronk" I think they were in Illinois and they made static converters (they may have made rotary as well). We used them in some old school buildings that had been converted from coal to oil and the converters were used to drive oil burner motors for the boilers. At that time 2hp & 3 hp motors were usually only 3 phase. Some of these old schools only had single phase power.
Cool story. Now a LOT of motors and pumps are controlled with VFD's on commercial jobs for versatility.
Missed out on a really nice Lincoln mig welder with a remote unit cause it was 3 phase 🫤
If its an old mig, it may be able to be powered adequately with one of these, but new digital ones will not work. This is not a truely balanced 'clean' 3 phase. It's kind of a like a bulll in a China cabinet 3 phase. Works well for what it is though. My brother has a rotary welder that has (iirc) a 20 hp 240v 3 ph motor powering the welder. We power that motor with one of these with a 3 ph 10hp idler with a 1/2 hp pony. Now the amp settings are definitely off because to get it to burn rod the way we wanted, I stayed by the welder and he started burning rods, he'd stop and tell me up or down.
When he knew the rods were performing the way he wanted for different thickness and diameters, he'd have me mark the dial. The settings ended ALL marked above standard settings for what would be normal. That indicated to us that the output was marginally reduced from normal amp settings....I hope that explains it good enough. Its been working for close to 30 years now. But I wouldn't risk wiring one into a new digital control unit.
@@tractorman4461 It was an older mig. Almost bought it a few months back but passed. I probably should have bought it and stored it somewhere in the shed 🔧
@@HODGEPODGEDODGEGARAGE Oh well, maybe a better one will fall in your path. There ARE a lot of reasonably priced welders out there. I'd LOVE to find a newer 'autoranging' mig. Those automatically adjust internally for the voltage applied. Singe or three phase, 240 or 480 it doesn't matter. No jumpers or pins to relocate....wire up and go !!
@@tractorman4461 Oh yeah, that would be nice. We have a Miller welder at work like that. It's one nice, but pricey unit 🙂👍
Way too high tech for me. What I did out of ignorance was run 120v to two legs of my idler motor(phase converter), 120v to two legs of the motor on my mill, then connected the third leg of both motors together. A simple knife switch is wired to the idler motor. I have a two inch pulley on the idler motor that I kick start and and flip the knife switch to start. The motor comes up to speed quickly and just sits there and hums. I've often thought about setting up a pony motor to start the idler but what I have has worked for many years.
An electric motor shop nearby runs a similar set up with a series of capacitors that start the idler motor for start up.
I'd really have to think hard on that for a while to figure out how and why that works...But if it does, it does and that's all that matters !! I've seen the other style as well...the ones with the series of capacitors without a pony motor. I actually think I have one in the back shed just sitting on a shelf.
I had a large south bend turning lathe. It was 3 phase and I ran it off a converter worked Ok.
Good morning Randy...I'm back in the saddle again !! Heck yeah man, the old tools are just as good as the new ones. Just like women....only a fool trades in a good old one for a new model !!
Man has to know his limitations
Hahahaha.....yessir, I like the way you think !! True that my friend.
also.....3 phase electricity is more efficient and can also be accomplished with variable frequency drives but gets pricey over 5 hp
Oh yeah....I've worked on and installed dozens of VFD's in quite the variety of applications. From very small to quite large HP ratings. Some of our large air houses we built ran twin 75 HP supply air fans, three phase enthalpy wheels and large power exhaust fans for building pressure control and BAQ...building air quality. Usually ALL vfd controlled.
Havent seen any new videos in a while.Hoping all is ok with you.
Hey....good to hear from you. We've been outta town for a couple weeks. Getting back in the groove soon. Gotta measure up a furnace change out tomorrow. Thanks for the concern. I appreciate that.
Good video but ya lost me on the theory early in the video. But if you use a Lovejoy, the driven motor is going to rotate in the opposite direction from using the belt. Does that affect anything?
The rotation of the pony motor has to jive with the rotation of the idler (3 phase) motor. Belt drive, they must rotate the same direction....but end to end they have to be reversed to both turn the same way. If you get the rotation wrong on the three phase idler, reverse any two of the three wires powering the motor. In other words changing any two of L1, L2 and L3 will reverse the rotation of the 3 ph motor. Same thing with the subsequent additions to the circuit.
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Hot dang another one slipped by !! Glad you got to see it though. LOL. Have a great day my friend.
most people don't use those 3 phase motors no more 22O 24O 48O VOLTS they use alot of current and U won't like the electric bill either that won't be no joke 😮😢 OMG 5 28 2O24
Most people don't have access to them but those that do really like to be able to use them in a home shop. The little more it costs on the electric bill more than over shadows the cost of new single phase equipment. Of course, that's only my opinion Clarence.
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Holy cow !! This comment was hiding in the spam folder for two months !! I forget to check this location sometimes. Well, thanks for watching the video back then. LOL.