Love your videos.. no obnoxious music.. just dialogue, perfect to relax to..

An engineer knows he has achieved perfection, not when there is anything left to add, but when there is nothing left to take away.

@josefaschwanden1502

4 жыл бұрын

Strongly disagree

@seancollins9745

2 жыл бұрын

@@josefaschwanden1502 then you are not a good engineer , or you work for mercedes

This could be very handy for large aquarium pumps. Thanks for sharing! That VFD is soooo much more simple than those such as the Allen Bradley ones. We used to use the 1336 drives a lot at work but now they are being phased out and we now use PowerFlex400 or 700 among other larger units.

Paul, do you know what a lovely guy you are? Well you should be told - you're calm, humble, happy and exceptional - you know me, I always speak how I feel. Even if I'm not VERY enthused about a particular video (rare, btw) I watch them because I enjoy your slow, careful and thorough style. You are such a blessing to me, I am sure many others will agree likewise. God bless you and Happy Christmas on your chair in what can only be assumed is... "Space Station V"

@MrCarlsonsLab

6 жыл бұрын

Thank You For your very kind words! Merry Christmas to you too!

@unlokia

6 жыл бұрын

Well people need to know, don't they :) - you're welcome, and thank you!

@peterfitzpatrick7032

6 жыл бұрын

unlokia Nice comment.... +1 from myself... 🎅

@martinda7446

6 жыл бұрын

He is the most amazing in this field - most likely no1 on the planet, I thought I was good, but simply don't reach his standards and couldn't. I'm much too slap dash in comparison. He is a technical Black Belt, 7th Dan master. The more I watch the clearer it is, and yes he is a delightful person too.

@fenarris

6 жыл бұрын

you wrote exactly what i was thinkin but with better delivery! my first thought was "this guy has to be The teacher". absolutely amazing instructional video! Mr Carlson has gotten one new Subscr. keep on the excellent work man! =)

Excellent video, not only for the subject matter but for the patient, enthusiastic, detailed explainations! I had no idea what a variable frequency drive was or what it would be used for, but now I want to build my own for a noisy fountain pump. Way cool!

Your videos are like ASMR for electrical engineers. Awesome content, awesome and knowledgeable engineer making that content, and no rubbish. You are a joy forever. Thanks for what you do.

Overclocked desoldering gun, nicely done.

@ET_Don

6 жыл бұрын

I actually laughed out loud when I read your comment. :)

@sagebrushrepair

6 жыл бұрын

Same. I love this comment.

Thanks Paul, I was hoping you would do a video on this. I remember your mentioning it a few times. You builds are always professional looking. Mine look like they were done at gunpoint.

@MrCarlsonsLab

6 жыл бұрын

LOL, Thanks Ian!

Mind boggling attention to detail. Extraordinary professionalism. Don't think there could be another like Mr Carlson.....Er, I'm just a little jealous.

@armandine2

2 жыл бұрын

Phillip Schofield is a television presenter who reminds me of Paul - similar un-flustered delivery

I really love this design and the build quality is top notch. Your ability to explain things clearly for us budding tech types is the best I've seen online, please keep up the great work! I also liked the way you provided a way to quickly return this device to its original format. I always try to do nothing I can't undo later - saved my butt many times over the years!

@MrCarlsonsLab

6 жыл бұрын

Thanks for your kind comment, and feedback too!

Thanks for this! I’ve been brainstorming a VFD circuit to control the run motor on a Hammond organ, it maintains its tuning via mains Hz. With this I could bend pitches which would be amazing.

@MrCarlsonsLab

6 жыл бұрын

If you build something, make a video. It would be neat to hear that.

Excellent video, This is the highest quality video I have ever seen on KZread….. You are amazing …..

You'd be hard pressed to find a smarter, wiser, better natured guy than this dude right here . A very Merry Christmas to you sir'

@MrCarlsonsLab

6 жыл бұрын

Thanks For your very kind comment! Merry Christmas right back!

@NipkowDisk

6 жыл бұрын

I agree 1000%- Mr. Carlson is an incredibly gifted, seemingly natural teacher. Such people are very rare.

Merry Christmas Paul & thank you for all of your time & expertise on all of your videos because you are helping so many people to understand, do repairs & even make their own items or boards because of you so once again many thanks from all of us & a very Merry Christmas to you & yours with a Happy New Year as well my friend, God Bless!

@MrCarlsonsLab

6 жыл бұрын

Thank You for your kind words and Blessings Thomas! Merry Christmas to you and yours as well!

Another fantastic video. Thanks for taking the time to share your knowledge with us, it's very much appreciated.

Now that is a solid design . Built to last .

That was a well worth modification Paul. All that baby needs now is some chrome to go along with that hot rod engine! Thanks for sharing.

@MrCarlsonsLab

6 жыл бұрын

Any time Buddy! Wishing you a Merry Christmas from our end!

NOS injection system for desoldering guns. :-) Great upgrade. Thanks for sharing. Mike

I always learn something from your videos, Paul! Thank you! Avery merry Christmas to you and your family! 🎅🏻 🎄

@MrCarlsonsLab

6 жыл бұрын

Thanks Jim, Merry Christmas to you and your family as well!

Merry Christmas Paul. You're a brilliant guy in this field and we all appreciate your videos. I have a Hakko 808. Works amazingly well for my needs. I can only imagine how much better yours is stock, let alone with the mod you made.

@MrCarlsonsLab

6 жыл бұрын

Thanks Glenn, and Merry Christmas to you too!

Fabulous, Mr. Carlson. I'm getting an understanding about the differences between a SCR drive and the VFD drive. Thanks !

Always appreciate your great videos. You are such a wealth of knowledge, and so easy to listen to. You do such a professional job on your videos, and they always seem so well prepared. Thanks so much for taking the time to do them. Hope you have a Merry Christmas!

@MrCarlsonsLab

6 жыл бұрын

Thanks for your kind comment James! Merry Christmas to you as well!

Paul your level of professionalism in every thing is bar none , I always try an watch your videos , I've learned so much already thanks for doing this for all of us noobs because you explain everything for a layman to really understand I'm gonna try an build one of these drives because I'm a clock repair man and I have multiple machines that need this

@MrCarlsonsLab

6 жыл бұрын

I'm glad you found this useful Daniel! Thanks for your feedback as well.

Another great video from the master himself. Have a great Christmas & thankyou

@MrCarlsonsLab

6 жыл бұрын

Thanks, and Merry Christmas to you as well!

I will go with ZEENER :-) Excellent as usual. Really appreciate this channel.

Can this get a part 2? I wanted to see the output waveform.

Hi Paul. This is an excellent video and it is very informative. The concept of using your VFD to control the induction motor is brilliant. HAVE A WONDERFUL CHRISTMAS & HOLIDAY SEASON ! 😀😀

@MrCarlsonsLab

6 жыл бұрын

Thanks Nerdygirl! have a wonderful Christmas as well!

When I was working as a computer programmer 3 stories underground at a base somewhere down a dirt road in virginia. I once saw maintenance/janitor guy fixing something they rolled out of the electrical room while I was walking to lunch. I only saw it for about 2 seconds, but it had a coil wrapping that was fascinating. The wrapping of the coil was not around a cylinder of iron or plastic. It didnt look like any normal looking wrapped coils. It was widely wrapped around different geometric shapes. There were about 12 stacks and each stack was offset so that when the entire coil was wrapped with the copper wire, the wire would protrude a little bit on each stack. Imagine a pole, and you slide down 12 6x6x2 square blocks, and then offset the blocks so it spirals upward, then lock the blocks in position and wrap the copper around the blocks, so the coil wire is not evenly lined up because it gets wrapped around the different position blocks. This is just me trying to paint a better picture of what I saw, it didn't necessarily spiral upward, could have been a more discordant different pattern of blocks, could have been different shapes than blocks. Basically they were using 'sacred geometry' as the basis for their copper coil. I thought that it must do some crazy stuff with the freqency, and wavelength, perhaps there using it to mess with phases idk. If anyone would know what that was, its you imo haha. Have you ever seen coils wrapped like that?

Hi Paul. Have you created a video capturing various precautions to take when designing and building a mains powered device? Not necessarily code specific requirements. Thank you

Tim "The Tool Man" Taylor would be proud! :) Thanks for another great video. Paul, I sent you a message with a question regarding DMM's. Wishing you and your family a Belated Happy Thanksgiving, and an early Merry Christmas / Happy New Year.

@MrCarlsonsLab

6 жыл бұрын

Thanks Donnie! Merry Christmas and New Year to you too!

Interesting circuit. Good for those who can get their hands on a HAKO destoldering unit without having to mortage their house.

Thank you for the video and happy holidays Mr. Carlson.

@MrCarlsonsLab

6 жыл бұрын

Thanks Stephen, Merry Christmas!

I have built a number of VFD drives for turntables using an oscillator to drive small audio amplifier like a LM3886 that drives a 120/12v torriod backwards. Most turntables only need about 90vac, but you can easily get 120vac also. you can also build as large a version of this you want using commercial PA amplifiers. Old crown DC300's, Peavey CS800's etc. work well

👍🏽👍🏽👍🏽 great info very well presented. The circuit diagram was pure gold!

Merry Christmas, Mr Carlson.

@MrCarlsonsLab

6 жыл бұрын

Merry Christmas Steve!

Dang, didn't think you could get a sine wave without some sort of resonant LC circuit. Learn something new every day.

Well Paul, once again you have taken what would be a complex unit and broken it down so it is understandable. Thank you as always and great design and build my friend.

@MrCarlsonsLab

6 жыл бұрын

Thanks Skycarl!

I have been looking for a single phase VFD. I would hope for a cleaner sine wave! great video.

Another in the LONG string of great topics! I work with VFDs a lot (maintenance on CNCs + other equipment as a machinist). Such an elegant design, as opposed to the over engineered units I an accustomed to IMHO. Thanks so much for explaining and sharing the schematic, it is going on my project list. What type of camera do you use for your video work? Pics are always great quality. Many thanks again, Doug

@MrCarlsonsLab

6 жыл бұрын

Thanks for your kind comment Doug! The camera is a Canon C100 Mark II.

@vylbird8014

6 жыл бұрын

Simple, but at a cost: You're only going to get a 'sineish' wave at best from it, with the efficiency loss and increased motor heat dissipation that implies. But for driving a dinky little motor, that's not a problem.

love your vids, have more meat than eev, im a first yr engineer, loved your explanation of the circuit

most excellent idea , fit , form , and function.. super job keep up the great work.. i just love your productions..

Very nice explanation. I actually understand this circuit. That certainly cannot be said for my Hitachi VFD.

Cool thank you Mr.Carlson

What about a VFD for single phase motors? Some of the Seeburg jukeboxes use an auto speed unit that enable them to play 7 inch 45 & 7 inch 33 rpm records. The Seeburg auto speed unit is basically a single phase VFD that raises or lowers the AC frequency to the turntable motor to play either 33 or 45 rpm. Newer Seeburg jukeboxes have an auto speed unit as an option.

Thank you so much for the great lecture it was very informative to me.

Great vid Paul as always. And have a great new year.

@MrCarlsonsLab

6 жыл бұрын

Thanks Mark, Happy New Year to you too!

"Rectified Mains" will be my new band name

@koushiks_energy

3 жыл бұрын

Shall I join

Fairly simple and useful, Nice!

This is interesting. Not the approach i would have used, but it is always interesting to learn something new.

Mr Carlson, Gods gift to the electronic world. only Paul could hot rod a hako desoldering tool! Electrical engineer of engineers.Mr Carlson always overengineres everything so it will last 2 lifetimes

Awesome video and technical and enginering information!!! Thank you for sharing. Is there a replacement part or something equivalent for the MOS-FET APT5022BNFR? I tried buying, but many electronic manufacturers do not carry it or it seems that is an obsolete part or no longer being made. I am trying to develop a VFD learning kit for students at my college. Thank you.

AUDIO Glitch & Thanks : : : The audio faded out several times as you moved around. I was able to get the important stuff , no problem. /// As usual your topic, knowledge, style of presentation and demeanor are World Class !!! Thanks for what you do.

This ties perfectly into the videos that AvE has been doing nice one!

@MrCarlsonsLab

6 жыл бұрын

Weird coincidence.

@unlokia

6 жыл бұрын

Except with no profanity (uncalled for) and no sycophantic Ave fanboys parroting his "catch phrases" to much cringing.

@kentvandervelden

6 жыл бұрын

What variant of English does he actually speak? Is far-north Canadian? I have a horrible time understanding him.

@EscapeMCP

6 жыл бұрын

Amen on the parrots

@robertcalkjr.8325

6 жыл бұрын

unlokia Yeah, and if you question anything you'll receive an onslaught of insults. But I can't complain - dumping that channel aided in my finding Mr. Carlson's Lab, so I'm happy! Also to all the closed minded sycophants there, I'll be wearing my Shaxon anti-static wristband again this winter(without a tether of course) to keep myself from being shocked when I touch stuff or getting in and out of my car. lol!

Hello Mr. Carlson! Thank you for sharing your knowledge. I wonder how high the oscillator frequency could go. I am interested in building this VFD to run 115 VAC, 3 A, 400Hz motors. I probably would have to have a different output transformer value and do you think the components at pin 5 and 6 on the TL494 would allow me to adjust the frequency up to 400Hz? Or I would need to change the values of the resistors and the capacitor? I guess that there’s a formula to calculate the values knowing the frequency value desired. Could you comment on that please? Thanks in advance Lewis.

That's a pretty cheap and simple way of doing that, and I am a little surprised that it works as well as it does, although single ended flyback power supply's are quite common and work quite well, they are simply rectifying and filtering the output, and using negative feedback to control the duty cycle of the mosfet to provide regulation, those power supply's use a powdered iron core that is non saturable meaning that it has a good Q factor as an inductor, which is generally not the case with low frequency laminated iron core power supply transformers such as the one you are using, they tend to be very saturable unless you take the core apart and re stack it with all the "E's" in one stack and the "I's" in another and then place a thin piece of cardboard such as that from the back of a notepad between the "E's" an "I's" to break the magnetic circuit so it won't retain high levels of residual magnetism, thereby allowing it to have a much higher "Q", and as someone else commented, about the current pulses that occur when that mosfet turns on and those capacitors in parallel with the transformer primary are at zero volts or even worse opposite polarity, you might consider adding a resistor of say 10 ohms or so just to limit the current peek a little, it'll reduce the stress on the capacitors and the mosfet.

"it is easy" Yeap, for you that are a god damn master of electronics art!! Thanks for sharing!

Could this be used to drive a 3 phase motor from a single phase supply by having 3 of these circuits with a pi filter with each oscillator phase shifted by 120°? (the motor is about 500W)

thank you for your efforts ...

So many followers happy with your hand-drawn--only--schematic. Interesting.

It might be a good idea to connect a fuse on both sides of the AC line going into the unit, as sometimes the hot and neutral are reversed.

Very nice work Mr. Carlson. Thanks for sharing and Merry Christmas...

@MrCarlsonsLab

6 жыл бұрын

Merry Christmas to you as well!

Great video, thank you

I kind of wish I'd seen this a few months ago. After much searching, I ended up with a Hakko FR-300 self-contained desoldering iron/pump instead of the 802 desoldering iron/470 pump system. Like you, I'd have preferred modifying a used device and making it better than new, but I must admit the FR-300 is an excellent tool as is. If it ever breaks maybe I'll take what I've learned here and make it better... By the way, since Hakko is a Japanese name spelled with two "k"s, I believe it is more properly pronounced "Hah-ko" rather than "Hay-ko", though only people who live in Japan would know the difference. Love your videos Paul. Happy Holidays!

@MrCarlsonsLab

6 жыл бұрын

You know, I worked beside an engineer years ago, he mentioned the same thing... Your probably correct!

@skeggjoldgunnr3167

6 жыл бұрын

Indeed, "Hah-ko" is the correct way to pronounce this...but that makes it difficult to rhyme "Fake-o" . We like to have our fun. I understand.

@fersunk

6 жыл бұрын

I don't live in Japan but I know how to spell it correctly. The funny thing is that *almost whatever native English speaker pronounce the words of another language in that form. I speak Spanish and I know how to spell it correctly at first glance (they way it's pronounced make it easier I guess). It's easier to learn another romance languages and japanese (at least how to spell it)

Hi Paul, as was mentioned earlier, mount the fan on isolator feet. That will quiet the noise.

A good improver to beat the pump's performance and thus to ensure quicker suction of tin from the circuit, I like it! Mr Carlson's I wish you a happy and merry Christmas! With Regards Miroslav from Slovakia Bratislava. :-)

@MrCarlsonsLab

6 жыл бұрын

Thanks Miroslav. Merry Christmas to you as well!

@miroslavbencic9582

6 жыл бұрын

Thank you Mr. Carlson's!

Very nice minimalist design. Thanks. Now onto 3 phase drive. 😁

Would something like this work for making 120 60hv to 120 80 to 200hz 120v around 3 amps ?

Old Maytag Neptune front loading washers circa 1998 have a nice variable speed 3 phase AC motor with a speed control built in that you can pickup used for a few bucks. The speed control only has 3 connections, a serial data input from the control board that tells it what speed and direction to run, a tach output so the control board can monitor the speed and AC power. I wonder how hard it would be to setup an Arduino to control the speed? There's an article on Hackaday with more information about how the motor works but they haven't advanced to the point of using a micro controller to control the variable speed system. hackaday.io/project/28630-variable-speed-washer-motor-and-controller-reuse

...a lot of knowledge right there! AWESOME. THANK YOU

Could you used a vfd like this to get a turntable to run at the right speed? Or is the current too choppy?

I've worked in a few labs, biomedical engineering and general technician level, your lab looks like an over ambitious Hollywood producers idea of what a lab actually looks like. I do however appreciate the fact that you are a fellow ham so keep up the good work. KD7YCX

I like this gray hammertone design !

Hi, if i may ask, Is it ok if i use this circuit design in a video? Also, what would happen to the transformer if you left out the thee capacitors?

Great add on to your pump Paul.But that way over my head.

OK, I work on a lot of old Teac "A" series decks. These use an induction motor and for some unknown reason they start to slow down. Is there a way to make a unit like this for speeding up these motors? The one of concern is the capstan of course. For those who think the cure is as simple as cleaning the insides and lubing this has been tried by many a tech, this is not the problem.

Well I must say that was really cool, Over the years I have souped up many things but never a piece of bench equipment. that got me thinking, I have a small drill press (AKA) a harbor freight nightmare it's too slow to drill PCBs and I'm considering building a unit like yours but the question comes to mind, why not just a frequency doubler inside the hako unit? I do like the stock plug option! So as I understand this a bit more the external power will not supply any voltage out unless the opto is triggered. So that would mean that the original voltage supplied to the motor inside hako unit is used to signal the external power supply, Nice they work together or not at all. Another cool design! Love your videos!

Could this be scaled up to run say a 3hp motor?

Do the three capacitors in parallel with the transformer form a tank circuit? Where does all that current go when the MOSFET switches off?

Really neat job have a good day. (:

@MrCarlsonsLab

6 жыл бұрын

Thanks!

hey mr. i would like to ask u, do u think there is a connection with frequency and humans

Great video! One minor detail...the Hakko sales reps I have spoken to pronounce the name with a short "a" as in the work "hack".

Wow, this APT5022 is tough, switching 12uF to 150V in microsecond times. Luckily it only does it below 100Hz. What about putting the 3x4uF on the transformer secondary side? The stray inductance filters and then discharging into the fet in avalanche might be less tough and also possibly better for EMI.

@theskett

6 жыл бұрын

Yeah, that "FET switches 12uF directly across the 150V" aspect made me flinch a bit, too; I'da added a low-value series snubber resistor between the FET and LC components. And I suppose if the caps were across the secondary, they should be higher value (per transformer turns ratio) but could be rather lower voltage. But as Mr C. says, it's been working for years; so it's definitely Good Enough as-is :-)

Might try some squiggle of hot glue on the inside of the case walls to deaden the sound if it bothers you. Though, by the look of your lab, it's all part of the ambiance. Great vid! I'd like to base a one-of controller build off your schematic, if you don't mind.

Hello there I am trying to find some that can take input AC110V 50 Cycle and output AC110V 60 cycle. Can you help. Thank you

Nice to see this

Nice project and presentation. What would it take to drive a 1/2 HP 110v single-phase induction motor? I got a hold of one dirt cheap to replace my drill-press motor, but it's double the speed. Variable speed would be nice, but I guess I could run ac through a half wave rectifier and a 1:1 transformer. I'm not that good on electronics, don't know if it's that easy.

Nice work, Paul. So you don't have any problems with the solder cooling too fast and clogging the nozzle with the increased airflow? Thanks for all you do. Merry Christmas!

@MrCarlsonsLab

6 жыл бұрын

Thanks Rob, Merry Christmas to you and yours!

tq ,for excellent videos,sir would u explain on servo drives in future videos, expecting a lot

Why have the open slits on the top and have the fan as well and you put extra holes underneath? You can quiet it down by inserting some self adhesive bitumen pads inside the casing. Get foil coated ones and non foil what they use in the car industry, this make it a lot quieter, and try installing the fan on some rubber grommets so it's floating. And maybe turning it upside down and having feet on the other side and having a bitumen pad underneath for it to sit on. I'm building a high end turntable and I'm looking what is my biggest problem! is for me is the motor and power supply I really want to go with AC, Would this be suitable with a conversion ? Running at 100 Hz and or 120 Hz. And any good suggestions on Motors. If I can get wow and Flutter below 0.024 or lower on a belt driven on a sophisticated double platter system.

Paul, how would you design a VFD with pure sine wave output that would make Photonicinduction jealous?

Dear Mr Carlson, I just started working on a project which consists of the design of a 3-phase 2-level inverter. The purpose is to drive a squirrel cage motor with scalar control and with the use of SVPWM technique. I have never designed anything like this before so I am having trouble to understand how to select the components that I need, such as diodes and controllable switches. Would you be able to help with this through your online lessons?

Some fine electrical engineering sir

Hi Paul, Interesting and simple circuit ingeniously designed really. I noticed you mentioned it can provide frequency of 60 to 90 hz or so, and I wonder if this can go below 60 such as 40, 50Hz, I have a washing machine collecting dust since it works on 50hz, and I have 60. Its a 220VAC, 2200W machine and all electronic controlled. Wonder if a VFD such as you dseigned would work, of course the wattage needs attention. Pl. advise if you will.

That is a heck of a difference.

Very interesting project. I builtSomething similar almost 50 years ago. Later i've used a power amp, with a sine oscillator to drive it. Output transformer helps to boost up the voltage. By the way my Patreon account collects 10$ from me each Month, but never lets me see your video's even though they send a preview of them every month. So i get to see your video's after they are old.

Cool project mr Carlson big thumbs up 👍

@MrCarlsonsLab

6 жыл бұрын

Thanks Allan!

What do you have to up the frequency to?

This guys a wizard.

@strangersound

6 жыл бұрын

No doubt about it. :)

@tom7601

6 жыл бұрын

I used to watch Mr. Wizard on TV, back in the 1950s. There are some of his videos on KZread.

I was wondering if you mounted the fan with rubber spacers to soften the vibration would that help with the noise? I imagine you tried that though. Your explination of the schematic was verry informative and clear to a novice like me. Thanxx

i have been through almost all your vids and as a complete beginner coming back to my interest in electronics i have found your channel to be one of my go tos for information which by the way has been awesome.. in all of what i have seen so far one thing has me curious.. with all of the test equipment you run.. what is the mains amperage service you run it all off.. again an awesome and informative channel for noobies..

@MrCarlsonsLab

6 жыл бұрын

Hi. Only a few pieces are ever on at a time, so nothing major. Probably less than a toaster or hairdryer.

@banjoperator

6 жыл бұрын

awesome..Merry Christmas to you and yours