Cheap 3Kw PSU for Induction Heater ll Huawei R4850G2 PSU

These PSU's are readily available on Aliexpress or eBay.etc Use the search term "R4850G2"
JLCPCB: $2 for 2Layer, 5pcs & $5 for 4Layer, 5pcs: jlcpcb.com/DYE
Taobao Volt/current controller:
English version: shop.tbfocus.com/item.php?id=...
Orginal Chinese version: 2.taobao.com/item.htm?id=5659...
PSU Pinout: bit.ly/3mjOGNp
Turn output On Pinout: bit.ly/3abOHAE
My Tig Welder: duroweld.co.nz/collections/ti...
Information provided in this video is for educational purposes only.
If you attempt to recreate/replicate anything you’ve seen in this Or any other video, you’re doing so at your own risk.
Schematix

[@larrypalmer7136]

I've come to expect great electrical videos from your channel, the really nice enclosure fabrication was unexpected. Nice work.

[@motherjoon]

your videos are very clean and well paced. Well done.

[@Beast80K]

I recently came across your Channel, I watched so many videos, content quality is really good ! We as an audience can see you're efforts. Keep It Up ! Merry Christmas 🎄!

[@jared85028]

Thank you so much for sharing love your cinematography good Cuts good edits great commentary fantastic build

[@victoryfirst2878]

Thanks for showing me TaoBao services fella. This will help me out just great.

[@ianbaker3281]

I fit these power supplies for a media company here in the UK, we use Eltec flatpack HE2. They are the same as that one you have. Very interesting video.

[@Music_Engineering]

That sponsor segway was SO random! Love it

[@gregzarkodimos9711]

Just landed on this channel. If I wasn't so broke, i'd buy into the 1st minute plug, just genius

[@isoladeipirati]

Beautiful video! So helpful that I subscribed to your channel. Thank you

[@Mosfet510]

Those are impressive numbers, quite a respectable amperage there. Good grab for $35!

[@shouryaumang6211]

I'm stumped by the power density here and at this price point it is unbeatable! Looks like a ZVS Full bridge converter after an active PFC rectifier. Im making a similar PSU but its nowhere close to this beast!

[@jimstravoulellis2602]

Excelent and stydied approach to eerything you do!

[@msf7168]

Really incridible explanation about induction heating power supply...

[@sortofsmarter]

great video.. I've been watching you sense " how to rewind a microwave oven transformer" you've come a long way...keep it up....

[@Schematix]

Wow, thanks!

[@sortofsmarter]

@@Schematix You were gone for so long I was worried....Glad to see you back and love the new shop..you have a great format and integrity

[@sortofsmarter]

@Norm T sorry....english is not my first language

[@frensoshaker4884]

man i respect how u make things .... so hat up for u

[@Farm_fab]

It was good to see you weld without filler wire. You can do the same thing when welding laminates on a transformer. It will be quicker, and will look much nicer as well. Keep up the good work.

[@simonstergaard]

Sweet when that lid slides in to the box...sweeet

[@donaldhoot7741]

I just soldered wires direct to mine! Works fine!

[@itanc1]

another very watchable film dood. useful stuff that psu. take care

[@bigmonkey999888]

Merry Christmas and a happy new year

[@bostedtap8399]

Great vlog, well done subscriber for sharing a gem. Thanks for sharing.

[@KCBhandy]

Just finished mine. Induction heater is next 😊👍

[@manhid1587]

good video, thank you, please review the Delta ESR-48 40A so that the DC voltage can be adjusted

[@benwilliam1010]

awesome work, thanks for sharing

[@lost4468yt]

mPrice has smick smocked right up there since this :( $92 (USD) as of March 9th 2021

[@Milkex]

glad to see you loving the chisel tipped TS80 as well!

[@cocosloan3748]

Coool ! You can use 2 of those to drive Hi-fi power amplifier 2x 3000W !

[@papengom8358]

This video help me to use my power supply

[@yukashy]

Nice Jon, ever! 🇧🇷

[@Viddiecent]

So cool! With that kinda power I could do Very Cool, Dangerous, Fun things hehe

[@sarrab.marketingservices5384]

thanks so much ,good work...we want a video about how to repair it

[@JawadAhmadsahibzada]

the thin wires which needed to be connected with ground to turn on PSU , i added a switch there - easy turn on and off.

[@victoryfirst2878]

Thank you for letting us all know about this power supply. What I am wondering is the average life expectancy of this unit ??? The power density is way up there. Look forward to you making the other part which is the induction heater. Great work too. V

[@lronet]

Tested this little controller on the Huawei R4875G 4KW 75 amp supply. Voltage controller worked great. I do not have a load bank sufficient to test the current limiter. I expect it will work just fine. Also using one of the PC card plugs available online. The card plug has a pair of CAN leads that connect together, however my supplies seem to start right up without those lines grounded. The R4875G is exactly the same size as the 4850, however it has more switching devices inside. R4875 delivers 75 amps at 240vac 53.6vdc or 32.5 amps at 120vac. The 4850 is 56.1 amps / 25.2 @ 120vac. both range from 41.2 v to 58.8v with the controller, and seem to remember setting as long as the controller is connected. I also installed a 37 ohm 2 watt resistor in series with the red fan header wire (to quiet it), using a $5 temperature controller to short the series resistor if the power supply gets hot. Any higher value resistor will cause the fan to surge. The tiny temp controller gets power from the fan header, so easy to hook up. www.banggood.com/Digital-Temperature-Control-Switch-Adjustable-Thermostat-Temperature-Switch-12V-Cooling-Controller-W1701-p-1587150.html?rmmds=detail-topright-recommendation&cur_warehouse=CN I think this controller will fit entirely inside if the screw terminal is removed and wires soldered directly. R4875G on Taowow baowow.. item.taobao.com/item.htm?id=604456015560&ft=t&toSite=main. A brand new one is about $75 US and about the same to ship it using this service. It came very quickly. Ali Express has them also, $100 plus shipping, so this way is cheaper and much faster. www.aliexpress.com/item/1005001762436248.html Thanks for turning me on to this little gem..

[@johnnycash4034]

So the voltage range is what you stated between 40 and 50 ish?

[@lronet]

@@johnnycash4034 about 41.2 to 58.8. I also discovered if you use two of these controllers with a dpdt switch, you can switch instantly between 42v and 58.8v This could easily be done with a logic circuit. Also I noted that in the center off position, the power supply didn't boot. once it boots, it stays booted. I had not grounded the other cann lines though. I used a miniature dpdt center off switch and just switched between the two controllers cann wires (blue and yellow). I'm now debating if I want to keep this circuit, or just put a single controller on my LDmos amplifier project.

[@laurentfievre5652]

Lonnie Have you a link available to order the can bus module? I m interested to bought it Regards laurent

[@nagoyakuroi6353]

ohhh i wanted to see the end product .... now have to wait next year

[@Aleziss]

thanks for the infos !!

[@electronic7979]

Excellent

[@gregwmanning]

What a great idea

[@didierlugan2601]

to improve the solderability of tabs, do some small holes on the tabs, where the tin welding goes; your welding seems a little strange? so, very good project!

[@nerdnoise]

Thank you!

[@artificialintel]

Excellent display of ingenuity.

[@apurvmj]

Impressive 👍

[@alexandermuratov7728]

An excellent solution in the construction of the device. Thanks for the idea! Can you please tell me where to connect the heating pedal (turning on)? What kind of relay is required or is there any heating control contacts on the circuit?

[@fvckyoutubescensorshipandt2718]

Pretty impressive that you get all those parts for $35. Was expecting to see a mostly empty box like cheap 500w ATX supplies.

[@randybobandy9828]

This isn't $35. The cheapest I found was $115 shipped from china.

[@fvckyoutubescensorshipandt2718]

@@randybobandy9828 yeah that sounds more realistic. $35 sounds too good to be true.

[@firstmkb]

I think they were dumping them at the time after the company’s products were banned from some other countries. He got a hell of a deal at that price!

[@mezzoono]

Love your work - It would be interesting your thoughts on the Eltek Flatpack2 48v??

[@garagenliebe3843]

Nice Video, can you tell me which output values the notebook powersupply from your electromagnetic vise already has?

[@sams5803]

Telecom scrap is amazing

[@christopherstaples6758]

my new fav PSU , better than combining HP DPS-1200FB

[@lj516]

Look at the hp c7000 2450w 200A psu, $20 on ebay power factor correction and 120-240v input but it's nothing on the flexibility of this one so it's become my new favorite too!

[@landroveraddict2457]

Great video, thank you for sharing. Did you make the CNC router?

[@vincenthamilton4792]

Could you please explain to me your welding technique without filler? Are you holding the filler to use at the start and end of the weld? Also really confused about how the top of that 7805 voltage regulator fell off at 11:19 when you applied the soldering iron...

[@wojowrench4716]

Your video on how to build a 3000W induction heater and PSU is awesome! I just bought a 2500W ZVS induction heater- it was local and a good price... I have a 2000W Delta PSU that I am going to use to power it... I have question - I will be using the unit to solder Carbide grit to steel that is 0.75" width by 0.75" height but it is not straight... it is in a 3" radius semi circle - basically it is a J Hook!. I need to solder grit evenly coated inside radius of the J(for gripping purpose) - which is tricky!! - If I make a coil big enough to fit the entire steel J by lowering it in from the top.... the entire part will heat up and the solder melt and grit will slump to the lowest point of the J... I so I have to make a smaller coil for localized heating and basically insert the J hook from the side and rotate it keeping the solder area level... - So I have to make a side mount coil about 2-3" in dia - about 2 wraps of copper tube (1/4") (Sorry for the big explanation !!) .... Now to the Question 1) If I reduce copper coil size will it place to much stress on the induction heater - aka lots of energy less area to dissipate? Or will the less wraps increase localized heat at the solder site? (aka the reverse of the first scenario?

[@jessstuart7495]

13:39 Nice sheet metal brake.

[@dreamcat4]

Great video, was just wondering where you got the extra wide insulation tape from, can you recommend ? It would be also nice to know if we have anything like that R4850G2 psu available locally here in UK since it does not seem to be available here. And the shipping cost is otherwise twice the value of the unit itself. But of course you would not expect you to know such alternatives, living so far away!

[@mouldykev]

Another Great video, just found the PSU on Ebay for AU $ 49 only problem is shipping to the UK is $90.70 is there a way around this as you were describing. kev

[@wearemilesfromnowhere4630]

Nice!

[@stevenandros4586]

Great video! Given your comments I decided to give Taobao Focus a try. I just ordered a power supply and the control board $59.75 for both (NOT including shipping to the USA)!!! I paid for the product, THEN, a few days later, I get the bill for shipping: $95.03 for a package that can't weigh 7 pounds! Taobao Focus is a RIPOFF!

[@lronet]

There is a Huawei R4875 4kw unit on aliexpress now. I ordered one, I hope that this voltage control works for it. Does the 4850 still run without the internal fan connected? How is the noise level? BTW.. this was a great video. very well done, even if I don't intend to make a heater... I use mine for an HF amplifier I am building now.

[@grahamjones6712]

This kind of power supply could be used to charge the new lifopo4 batteries also

[@angusmitchell3901]

Love the video! I'm wondering why you added the RCD? I believe it's AS/NZS now for buildings to have RCDs. Am I wrong in assuming these would protect you if you were to come into contact with the AC line?

[@bolajiben]

Thanks, after repair i was utnable to test the output supply but when I watch the backplain looping you did, I was able to load test it, thanks bro, I want to know how to test the output for Delta dpr48/30 bdce

[@cncdavenz]

Merry Christmas to you and yours. Nice power supply I bet it is also power factor corrected. Do you have a link ?

[@Convolutedtubules]

Easiest way to control via switch or foot pedal? Can the pin connected to ground be used or would it be better to use some kind of contactor or relay?

[@jiradechsommung404]

Thank you very much.....Big DaTa

[@james10739]

That's crazy that you can get all that generally they are not really current limited except just a shut down and I assume that is really when it can't supply the voltage anymore so it shuts down

[@ardwikarindra9261]

mantaaaaaaaaaaap sir heating induction nya luar biasa iam from tambun west java Indonesia

[@hussainshabbir540]

I am curious if we can connect this PSU in series safely ? Would appreciate your suggestions and tips on how to do it

[@user-gw1fb7no3s]

The 1 and 5 legs are supplied with a voltage of 0 to 5 volts to adjust the current, or can you install a trimmer between the 1 and 5 legs? To adjust the voltage between 1 and 16 feet, can you put a trimmer resistor or do you need to supply a voltage from 0 to 5 volts?

[@StreamzNow]

any idea wherew to find the volatge adjuster? the website listed doesnt work anymore

[@EasyOne]

nice

[@PerchEagle]

so the type of applications clear many things of electronics in certain area is working. like this psu which is used in cellular towers. now I learned what range if voltages used in this type of applications. of course they are using power electronics devices for the powerful electromagnetic waves. the voltage is not so high it's 56 volts but the current is really high a question come now to my mind is that where voltages of hundreds or thousands are used ?

[@ajaykumargupta4367]

Dear friend Your explanation as well your vedio is outstanding. I salute you. frequency you get output to be fed to induction coil ? Can you please make power supply vedios for one Kg gold melting?

[@Protocol-X]

I was thinking about using a few hp dps-750 in series as they are cheaper here and have a high current for 110v. What would be the safest way to make them adjustable once in series? I looked around and most videos are using dc -dc converters, but they don't handle high currents.

[@OtherDalfite]

Schematix, if you're ever in a situation where that flux gets on the threads of it's container, clean it off ASAP. I was fool and left some of mine on the threads and the lid literally glues itself shut.

[@darwinwandler9136]

can you apply DC input by plugging in AC to PS with RF heater circuit coil having a steel load in coil?

[@jacquesblais6094]

I see that you used the Tig, was your case in metal or aluminum because you cut your background with the CNC for your fan.thank for the Video

[@manoelmoura682]

tks sir

[@romanvarcolac2238]

Hacksaw: The ultimate in PSU adaption technology

[@Mr_Wh1]

@Schematix Did your R4850G2 become very hot when turned on without a load on the output? Mine do, and I am pretty sure it's not supposed to happen. I just want to be certain it isn't some weird supply pumping, or inductance dumping that causes energy to be converted to heat. The supplies are very expensive now, so I would prefer not to have to buy a new one...

[@zenonkazienko988]

I'd love if you would show it's efficiency (power in/out) at a few load values in your followup video if possible? Also wondering about the current limit setting and variable voltage limits. You mention that the voltage can be set in the range of 41-58V and 0-60A. If you say set a limit of 10A into a 2ohm load this would only require 20V. Can it do that or can it only do current control when the matching voltage is within the 41-58 range?

[@johnnycash4034]

My question also. Too bad the cnt doesn't reply here.

[@user-yv8pr8sz6f]

На Авито есть в Москве за 4500,у меня в избранном,LTO уже приехал жду MS на 300А с зарядным током 60А,... Спасибо 🤝 большое за видео,вовремя,сам бы долго разбирался что да как...

[@mbsingh4597]

Hello, Nice information. Would like to know if this taobao voltage & Current limiter needs to be in the circuit permanently or if it should be removed after its job is over and the new voltage and current limits you set remain and the Power supply boots up to the new parameters after removing it from the circuit? it's not clear how to know what current is set as there was no visual of it after pressing twice to get into the current setting mode and the red LED blinks. Please let me know. Thank you.

[@iz5cbmpaolobennati51]

Hi good morning. i would be interested in using this power supply to power an rf amplifier, modules require 65v but 50-53v is fine too. a curiosity, what are the differences between the G and G2 version as circuitry? are they activated and the current and voltage are drawn in the same way?how much can a similar power supply cost? thanks for the video

[@KernsJW]

Nice find and video. Also, great ideas for connecting to the unit. While you were soldering, Why not heat the pcb and then copper to pull in solder more? As for the mains, couldnt you use heat shrink on the mains lines versus tape? I keep thinking I should by a tig and move away from mig when I see videos like this!

[@Schematix]

Thanks! Heating the PCB would definitely help the solder to wick into the joint. The insulation tape is only temporary while I was testing on the bench.

[@ajtucker4217]

I’m trying to make a power supply for an electric vehicle that I can very the volts and the amps for if I built two of these and isolated them could I run them and series to get around 100 V?

[@stevetobias4890]

Great video. I wish I had your welding skills and ability to build enclosures like that. Very cool. Are you also an Aussie? If so what state?

[@kac3514]

He is from New Zealand

[@airsoftargonaut3738]

Could this unit be worked to make 12v with that sort of amps?

[@gillesdesansac5474]

Where i can found voltage and flow control board PSE. Taobao merchand site not useful from Europe. Cant' fount it neither on ebay or aliExpress. Thanks

[@user-gy7ze8cj7v]

Sir, I am near (HUAWEI R4875G1)Is the pin out of the said model the same as yours? Please provide an answer.

[@user-xl6mi1py8b]

عندي سؤال مهم هل من الممكن ان تصهر الفولاذ او صنع واحدة اقوا لصهر الفولاذ

[@mattdunlop6056]

Instructions unclear, PSU now supplying 1.21 gigawatts at 88mph

[@Egzoset]

It still a Mazzilli/Royer ZVS directly transfering workload to PSU, right??

[@marmac567]

How did you know all that about a unit youve not seen before??

[@j.rkaunang7493]

It's work 😁

[@SeanHodgins]

I wonder if a hot swap connector could be 3D printed. But maybe it would melt. Does anyone know what the mating connector looks like? edit: Just looked it up, you can buy the connector for the back PCB for around $20 too and it has heavy duty connectors built into it.

[@fardreaming]

How loud is the fan on this PSU, say at about 1kW?

[@russellwilson5246]

hey that earth contact between positive and negative dc....it looks to me like its conected to nothing....can any one else confirm this? i can not get continuity with the chassi or the other pins...also if you file away round the ac metal terminals you are left with spade conectors.. (they are close together.)...am i corect in thinking the ac earth can be simplified by conecting to the chassi some where? also if you do the same file round the metal with the dc terminals you are also left with big spade conectors..if that "earth" between them is nothing but a dead end then it can be removed and big spade conectors will fit.its showing 53.7 volts with out the centre pin between positive and negative dc being conected so it would seem it works with out that centre pin/contact.any thaughts?...oh i also noticed after filing that some parts of the board have 4 laminations of metal...when you drill and through bolt you are conecting all laminations together..hold it up to the light and you will see tiny holes punched in ac and dc terminals.i suspect this joins the laminations together or maybe it does not but any solder seeping into the holes would join laminations. the 2 tiny pins do not have these holes...any thaughts on this?...could we be shorting some thing if we drill bolt or solder?..i have just now discovered that it runs and shows the 53.7 volts dc with only the bottom tiny pin conected to dc negative.

[@iz5cbmpaolobennati51]

can you make another video to r4875g modify?

[@elderbautista3202]

What is the link to buy the voltage converter module on Taobao Focus please

[@okwieegwuagu832]

I checked the psu on aliexpress, couldn't find the exact type

[@rizkyp]

I got almost the same power supply from surplus supply also for mobile tower. Had to mod the fan thought it is very noisy.

[@randybobandy9828]

Price? Got a link?

[@dameerdj5403]

Quite easy to do your own if you have a facility...