pretty big boy Up there with some of the largest electric motor Ive been around those were 1250kw and they were deep down in a sewage pumping station lifting sewage up to the surface from ~45m deep. One motor was driving one pump each via a driveshaft and the whole setup was only spining at 750rpm which meant the torque was at around 15.000nm which is wild to think about but a semi truck in a very low gear at full throttle can easily send that kind of torque into the driveline. Bro those pumps were able to pump sewage trought a 45m pipestack at around 4.5bar and still they had a max flow of like 2600l per second. Unreal power. And it gets better they had 10! pumps in there. They made the entire building vibrate constantly I mean they pump raw sewage and all the garbage in there these pumps would probably shred a big branch or woodpieces and no one would notice. Even with the sewer at max capacity like literally 100% full to the point where it was shedding off water at overflows upstream due to severe rain they were only running 5 to 6 pumps at a time. Of course they had to overbuild the pump station for redundancy so one pump can be taken out of service at all times. The whole installation was of enormous scale like you dont realize how big a room 60 meters wide and 45m tall really is. Each pump had its own transformer and they were switched on the HV side too (22 or 33kv I dont remember) because 1000+ amps per phase on the 690V side was too much. As you can imagine standard SF6 switchgear handling a fraction of the current that would be on the LV side lasts longer. But they had some sort of IGBT frequency converter setup on the LV side to slow the pumps down and for a softer startup I would assume. Didnt have a detailed look at the cabinets I was there to perform maintenance on something else.
In principle it’s municipal water but god only knows what’s growing inside. Parents had that problem with their multi-kilowatt medical laser that had filtered DI water cooling and algae loved to grow in there (presumably due to the light leakage from the xenon lamp and room lighting). Had to flush it every so often to get the green goop out. Although the copper plumbing and constant circulation here probably keeps it fairly sterile.
I recall watching a video of a 1930's radio station that used one of these rotary converters, the voltage output was less than 50 VDC however the current output was 4kA. This is quite a massive machine and used early on with the subway. The MG sets I'm familiar with are those used in DC traction elevators.
Researh the 500 KW AM station in Cincinnati. WLW. The filament supply generators were massive. Several RUclips videos. Also the Alexanderson rotary transmitter at Grimeton still fires up several times a year.
There were 2 rotary convertors on the essential supply system of the nuclear power station at which I worked for 20 years. In normal operation they would maintain a constant trickle charge to the storage batteries. If the incoming 415V ac supply was lost, the salient pole ac generator would maintain sufficient power to run the low speed circulator pony motors and oil pumps. Starting up following maintenance was not as easy as in this video. A diesel alternator at reduced voltage was connected to the ac generator to run slowly up to full speed whereupon the dc motor/generator would be excited and connected to the battery. The ac breaker would be opened and reconfigured to synchronise to the ac busbars, everything then being readjusted to maintain the battery trickle charge. Horrible machines, but at least the diesel alternators were good- W. H. Allen manufacture.
It's because of overall resonance which is one of harmonics of dynamic impedance frequency (in short xD) and ammount of back EMF of the engine as whole assembly of electromagnets limited by delta-star configuration
It gets quieter as it reaches rated speed because the speed of rotor equalizes with the speed of the rotating electromagnetic field of the stator, thus the power demand rapidly decreases to idle load.
Woah, never occurred to me but that is exactly what that feeling is. It's the same feeling I get when I catch myself in a sleep paralysis, it's like this feeling that something bad is impeding and it's ramping up.
@@redsquirrelftw I fired up a V12 Detroit backup generator set for one of the buildings I worked in and she ran away. You should have seen those old fat guys hauling ass lol. I gave her a big hit off a fire extinguisher and shut the flapper and got it shutdown. They all respected me for keeping cool after that.
Yeah, starting these up and hearing the aggresive 50Hz startup was always an experience, hoping they wont go boom since this older model was prone to motor failures 😁 But unfortunaely they're all gone now, scrapped. The factory was closed down for good earlier this year 😞
It is for sure! Unfortunaely all of them have been scrapped as the factory closed down its business for good, and soon it will be demolished. The 2kHz output was used in induction heaters to heat up steel cylinders, which were then processed in hot press forging machines.
@44Kilovolt Oh wow, that is a fascinating use of the high power, high frequency power. It's a shame that the plant closed. I do appreciate you explaining the use of the converters, though.
@@pootispiker2866 Brake Torquing is when you hold the brake and the accelerator at the same time in an internal combustion engine car with an automatic transmission to allow the engine to build torque and “get up on the converter" before launching. Google is your friend here. This really doesn't work in an EV since they make max torque at 0 RPM, but it would sound cool if they could. Example. ruclips.net/user/shortsPnu1UJfpUwc “Just say something to let everyone know, you know nothing” -Someone
@@pootispiker2866 Obviously. That artificial humming sound is just the cat's pajamas. I'll take that over a highly tuned ICE any day 🙄. Some of us EV owners still have a soul and are still car enthusiast. You do not appear to be.
@@SkyzTh3Limitt Relax, I just told you how things are ya sensitive git. You, despite claiming to have a soul, continue to demonstrate living in complete misery. Have you tried being happy? I like cars and I can tell a pretty car apart from a Nissan Rogue. My Chevy Bolt's just a car. I like it, and it does the car thing pretty well. Do I need to put myself up on a soapbox when saying as much? No.
Awesome, what is the unit used for? That's a lot of ULF RF output! Is the output 3ph or single ph? Edit: just realised it's for an industrial induction heater, super cool!
It is used to power up induction heaters that heat up usually steel cylinders up to 1250 degrees celsius which are then processed in hot press forges. There used to be 10 units in total few years ago, now there are 5 from which 3 are functional, 1 is being repaired and the other one is currently dismantled due to short in a motor windings, might get repaired in the future.
Thats a water cooling of the rotary converter. Its done like that so its clearly visible that the water is flowing. In case the water stops flowing, there is a sensor that will register that and automatically shut down the rotary converter.
@@44Kilovolt It's an interesting machine. I'm assuming its massive inertia provides the stable frequency output required for efficient induction heating. I've been doing some investigation regarding the process, as I'm unfamiliar with the physics.
@@quick75023 Yep, they do have a tremendous inertia indeed. When the rotary coverters are turned off, they usually keep spinning for an half hour before they stop.
A pretty old machine that stills lives. At my work, there's something simular for testing purposes. Can you tell us the technical datas, e.gh. rated voltages and hp / kW?
@@44Kilovolt Notice how the 50 Hz hum quiets down once the rotor comes up to full speed; the armature current falls off once the rotor is no longer accelerating. The machine must be running without any significant load; once it's at speed, only friction losses need to be supplied.
@@44Kilovolt True, but even the weight of the rotor represents a significant load. I'm sure the rotor weighs at least one or two tons, maybe more. To accelerate that to 3000 RPM in 24 seconds takes a lot of power.
Yes, its to check visually if the water is flowing. There were also water flow and pressure sensors that would shut down the converter if it went beyond minimum.
What I would give to be able to... 🚵 Have one of these mounted onto my bicycle to drive the rear wheel, and 💪 Have enough physical strength and might to be able to carry a backpack with enough lead cells and an inverter capable of driving it! 😁 I can't seem to stop playing this on repeat right now. It's slightly slower to get up to speed, but it sounds every bit as epic as a TGV TransManche! 🚄🇪🇺❤🔥🤘💨
I remember seeing pumps all over plants and refineries where I wanted nothing to do with them restarting. I’m not against the sparkies wiring them, but the idea of I smell weird smells and that miniature potential nuke setting things off while I’m doing my thing.
The older type units, like the one in the video was prone to motor failures on startup. From what i heard from former co-worker, it could do a seriously loud bang.
It converts electricity to different output paramaters than the input parameters. In this case, the input is 6300 volts at 50Hz frequency, and the output is 1000 volts at 2000Hz frequency. The output is the used to power up induction heaters, which heat up metal cylinders that are then processed in hot press forging machines.
Indeed they are, but the company wont replace them with static converters due to price cost, lenght of the removal/installation process (bigger half of the production lines wouldnt be able to produce) and probably the old 6kV switchboard would need a replacement too. So yeah, thats a big no for the company. But iam glad that they are keeping such old technology running, it has its own magic. Oh and btw there are 5 static converters too, 4 of them are from 1980's and one is new from 2019. They are just located in a different place than the rotary converters.
@@weeardguy Yes they are durable, but a soft starter would extend lifespan of the motor part. Burn out / short circuits of the motor windings were quite common during the startup as its the most critical part during the operation of the rotary converter.
Its watercooling drain, it is made visible like that so the operator/maitenance can cleary see that the water is flowing. If water stops flowing or the flow pressure is too low, the pressure switches will trip the high voltage breaker and rotary converter will stop.
@@44Kilovolt The 800 kW MG unit I mentioned in another comment string had a 50 HP pony motor that provided initial rotation on startup. The starter on the mains was energized as the pony motor dropped out. The unit was used in a data center application, and a bypass circuit was wired to the control cabinet. The unit output breaker and the bypass breaker had motor drive mechanisms. If the unit failed, the breakers would operate in the 500 milliseconds before the frequency of the MG decayed below 60 Hz. This was back in the days of TTL control, and the logic worked quite well.
It converts high voltage 6300V low frequency 50Hz to lower high voltage 1000V medium frequency 2000Hz which is used in induction heater. Induction heaters do heat up steel cylinders (usually) which are then forged in forging presses.
This is actually a very special converter, it's purpose is to output 1 phase power, with a twist. That being It changes the line frequency to 2000Hz for a induction smelter. It's certainly cheaper to use a spinning thing than huge set of inverter banks with loads of power transistors or FETs to do that.
@@theLuigiFan0007Productions And back in the 1960's there was no other option than using rotary converters. Such semiconductor converters were being made since early 80's here with GTO thyristors.
@@44Kilovolt Indeed. And often the DC for things like electric trains was provided by Mercury Arc Rectifiers. The 3 and 6 phase ones look like a glowing blue octopus when in operation. Always very interesting to research the origins of various technology.
pretty big boy
Up there with some of the largest electric motor Ive been around those were 1250kw and they were deep down in a sewage pumping station lifting sewage up to the surface from ~45m deep.
One motor was driving one pump each via a driveshaft and the whole setup was only spining at 750rpm which meant the torque was at around 15.000nm which is wild to think about but a semi truck in a very low gear at full throttle can easily send that kind of torque into the driveline.
Bro those pumps were able to pump sewage trought a 45m pipestack at around 4.5bar and still they had a max flow of like 2600l per second. Unreal power.
And it gets better they had 10! pumps in there. They made the entire building vibrate constantly I mean they pump raw sewage and all the garbage in there these pumps would probably shred a big branch or woodpieces and no one would notice.
Even with the sewer at max capacity like literally 100% full to the point where it was shedding off water at overflows upstream due to severe rain they were only running 5 to 6 pumps at a time.
Of course they had to overbuild the pump station for redundancy so one pump can be taken out of service at all times.
The whole installation was of enormous scale like you dont realize how big a room 60 meters wide and 45m tall really is.
Each pump had its own transformer and they were switched on the HV side too (22 or 33kv I dont remember) because 1000+ amps per phase on the 690V side was too much.
As you can imagine standard SF6 switchgear handling a fraction of the current that would be on the LV side lasts longer.
But they had some sort of IGBT frequency converter setup on the LV side to slow the pumps down and for a softer startup I would assume. Didnt have a detailed look at the cabinets I was there to perform maintenance on something else.
Damn! Now that is something that'll pipe the shit right outa your house!
Great info! Thanks for the knowledge. 👍🏽
high voltage motors sound so good
I don't think any fictional machinery scares me more than the real stuff.
The sound of Kv's trying to go somewhere just hoping its not towards you.
My screen dimmed when that thing came on
Yep, my fire extinguisher flew across the room!
🤣🤣🤣👍🏻
😀
And again when the second one came on.
Wow ! Hear this massive inrush at the beginning.
And the Clunk.
Yep, it is proper industrial stuff, maybe one of the manliest things on the planet.
I love the juicy sound it makes.
There's 3 different sound harmonics. Very cool and LOUD AS HELL
My electric bill just shot through the roof on start-up!😂
I love the setup for the cooling and that would make an awesome fountain!
In principle it’s municipal water but god only knows what’s growing inside. Parents had that problem with their multi-kilowatt medical laser that had filtered DI water cooling and algae loved to grow in there (presumably due to the light leakage from the xenon lamp and room lighting). Had to flush it every so often to get the green goop out. Although the copper plumbing and constant circulation here probably keeps it fairly sterile.
I recall watching a video of a 1930's radio station that used one of these rotary converters, the voltage output was less than 50 VDC however the current output was 4kA. This is quite a massive machine and used early on with the subway. The MG sets I'm familiar with are those used in DC traction elevators.
4000 Amps is crazy.
Researh the 500 KW AM station in Cincinnati. WLW. The filament supply generators were massive. Several RUclips videos. Also the Alexanderson rotary transmitter at Grimeton still fires up several times a year.
There were 2 rotary convertors on the essential supply system of the nuclear power station at which I worked for 20 years. In normal operation they would maintain a constant trickle charge to the storage batteries. If the incoming 415V ac supply was lost, the salient pole ac generator would maintain sufficient power to run the low speed circulator pony motors and oil pumps.
Starting up following maintenance was not as easy as in this video. A diesel alternator at reduced voltage was connected to the ac generator to run slowly up to full speed whereupon the dc motor/generator would be excited and connected to the battery. The ac breaker would be opened and reconfigured to synchronise to the ac busbars, everything then being readjusted to maintain the battery trickle charge.
Horrible machines, but at least the diesel alternators were good- W. H. Allen manufacture.
what a Monster!
The faster , the quieter it gets 😊
Electricity only makes noise when things resist
It's because of overall resonance which is one of harmonics of dynamic impedance frequency (in short xD) and ammount of back EMF of the engine as whole assembly of electromagnets limited by delta-star configuration
It gets quieter as it reaches rated speed because the speed of rotor equalizes with the speed of the rotating electromagnetic field of the stator, thus the power demand rapidly decreases to idle load.
The sound this thing made as it was spinning faster and faster triggered my fight or flight response so badly.
Woah, never occurred to me but that is exactly what that feeling is. It's the same feeling I get when I catch myself in a sleep paralysis, it's like this feeling that something bad is impeding and it's ramping up.
@@redsquirrelftw I fired up a V12 Detroit backup generator set for one of the buildings I worked in and she ran away. You should have seen those old fat guys hauling ass lol. I gave her a big hit off a fire extinguisher and shut the flapper and got it shutdown. They all respected me for keeping cool after that.
Excellent sound capture !
Thank you!
I think I saw the New York City skyline dim at start up!
My heart would definitely stop before this thing reach max speed
correction, if you touched the terminals of that, your heart would be deleted in less than a second :)
stará škola ... a funguje dodnes :)
What a beast 😉👍🏻 gave me goosebumps 🥰
Yeah, starting these up and hearing the aggresive 50Hz startup was always an experience, hoping they wont go boom since this older model was prone to motor failures 😁 But unfortunaely they're all gone now, scrapped. The factory was closed down for good earlier this year 😞
I'm reminded of the Raymond Scott composition "Powerhouse".
Is there a second one starting up in the background?
Yes
My screen dimmed from that inrush current
Lol
Lovely machine with an amazing startup sound! My question is this.. What is the use of the 2KHz output current? That is an odd frequency output.
It is for sure! Unfortunaely all of them have been scrapped as the factory closed down its business for good, and soon it will be demolished. The 2kHz output was used in induction heaters to heat up steel cylinders, which were then processed in hot press forging machines.
@44Kilovolt Oh wow, that is a fascinating use of the high power, high frequency power. It's a shame that the plant closed. I do appreciate you explaining the use of the converters, though.
@ You're welcome! Check my other vids too if you're interested, I've got more videos of various stuff from the factory ;)
well half the us just browned out when this started up.
we can paint him yellow so he looks like one of us
It deserves a new paintjob for sure, but unfortunaely its not up to my decision. The original paint was red base block with cream-white covers.
nah Menzel 💀 💀
@@44Kilovolt,
That sounded attractive.
Now if an EV could sound like that when brake torquing, I'm IN!!
Brake torquing? I love it when words don't mean anything
@@pootispiker2866 Brake Torquing is when you hold the brake and the accelerator at the same time in an internal combustion engine car with an automatic transmission to allow the engine to build torque and “get up on the converter" before launching. Google is your friend here. This really doesn't work in an EV since they make max torque at 0 RPM, but it would sound cool if they could. Example. ruclips.net/user/shortsPnu1UJfpUwc
“Just say something to let everyone know, you know nothing”
-Someone
@@SkyzTh3Limitt EV motors don't make induction sounds because they don't use induction motors or frequencies that are loud to our ears.
@@pootispiker2866 Obviously. That artificial humming sound is just the cat's pajamas. I'll take that over a highly tuned ICE any day 🙄. Some of us EV owners still have a soul and are still car enthusiast. You do not appear to be.
@@SkyzTh3Limitt Relax, I just told you how things are ya sensitive git. You, despite claiming to have a soul, continue to demonstrate living in complete misery. Have you tried being happy?
I like cars and I can tell a pretty car apart from a Nissan Rogue. My Chevy Bolt's just a car. I like it, and it does the car thing pretty well. Do I need to put myself up on a soapbox when saying as much? No.
Warp 6 and increasing!
Awesome, what is the unit used for? That's a lot of ULF RF output! Is the output 3ph or single ph?
Edit: just realised it's for an industrial induction heater, super cool!
It is used to power up induction heaters that heat up usually steel cylinders up to 1250 degrees celsius which are then processed in hot press forges. There used to be 10 units in total few years ago, now there are 5 from which 3 are functional, 1 is being repaired and the other one is currently dismantled due to short in a motor windings, might get repaired in the future.
@@44Kilovolt so awesome to see motor gens being used instead of tubes or transistors. Awesome tech!
@@inductivelycoupledplasma6207 Yes, tho we do have a few thyristor static converters too
@@MFKR696 Nope that is incorrect in this case, the input is 3 phase 50Hz 6,3kV, the output is 1 phase 2000Hz 1kV.
that's a lot of wall juice needed to make that boy spin
God, I'd like to see the contactor(s) when this starts up...
I may make a vid of the HV switch turning on
@@44Kilovolt,
Please do!
@@jacknedry3925 Just published a video of the high voltage breaker :)
What is the pipe dumping water into the funnel on the right?
Thats a water cooling of the rotary converter. Its done like that so its clearly visible that the water is flowing. In case the water stops flowing, there is a sensor that will register that and automatically shut down the rotary converter.
The 50Hz sounds much more interesting when seasoned with 2kHz and its harmonics.
“Mom, can we have THX Deep Note?”
“We’ve got THX Deep Note at home”
The THX Deep Note:
Nice!
Is that water?? For cooling?
Yes the motorgenerator is watercooled :)
and drinking
This sounds like a straight up death ray on startup
Damn that startup sound is insane. Probably the angriest sounding motor I've ever heard
2kHz, is it used for an induction heating/melting?
Yes
My Pc at 3 am when I want it to be quiet:
ARE YOU READY TO ROCK!!???
Excuse my ignorance but what is that water you see? Does it serve to cool something?
Yes its the watercooling of the rotary converter. Its made up open like that so the water flow can be clearly seen.
@@44Kilovolt Perfect, I understand, thanks for replying🙂🙂
How many poles are there and what RPM is used to accomplish 2kHz? The largest one I have installed and maintained was an 800kW 60Hz/60Hz unit.
Rotor spins at 1480RPM, so the generator should have 160 poles for 2kHz output
@@44Kilovolt It's an interesting machine. I'm assuming its massive inertia provides the stable frequency output required for efficient induction heating. I've been doing some investigation regarding the process, as I'm unfamiliar with the physics.
@@quick75023 Yep, they do have a tremendous inertia indeed. When the rotary coverters are turned off, they usually keep spinning for an half hour before they stop.
If Tesla CC could make their cars sound like that, I would definitely buy one.
*_Impressive._*
It has integrated Hypnotoad.
A pretty old machine that stills lives. At my work, there's something simular for testing purposes.
Can you tell us the technical datas, e.gh. rated voltages and hp / kW?
Unfortunaely the factory has closed down and the rotary converters were scrapped. Info is in the description.
This looks like something that should power a vampires house
What’s the 2kHz AC Output used for?
For induction heaters
@44Kilovolt Thanks!
@@kurtiunlisted8589 You're welcome :)
50 Hz sounds so deadly.
I always thought so. It definitively sounds scarier to me than 60Hz.
@@44Kilovolt Notice how the 50 Hz hum quiets down once the rotor comes up to full speed; the armature current falls off once the rotor is no longer accelerating. The machine must be running without any significant load; once it's at speed, only friction losses need to be supplied.
@@Obladgolated On the startup its running without a load, the only load being the weight of the rotor and friction in bearings
@@44Kilovolt True, but even the weight of the rotor represents a significant load. I'm sure the rotor weighs at least one or two tons, maybe more. To accelerate that to 3000 RPM in 24 seconds takes a lot of power.
This is what electric cars should sound like.
ill use that for my plastic fan rn
I think i saw the sun dim when that thing started
What is the little "fountain" for? Is it some kind of indicator that the coolant water is flowing?
Yes, its to check visually if the water is flowing. There were also water flow and pressure sensors that would shut down the converter if it went beyond minimum.
What I would give to be able to...
🚵 Have one of these mounted onto my bicycle to drive the rear wheel, and
💪 Have enough physical strength and might to be able to carry a backpack with enough lead cells and an inverter capable of driving it! 😁
I can't seem to stop playing this on repeat right now. It's slightly slower to get up to speed, but it sounds every bit as epic as a TGV TransManche! 🚄🇪🇺❤🔥🤘💨
A real motor for real men.
Heck yeah !
I remember seeing pumps all over plants and refineries where I wanted nothing to do with them restarting. I’m not against the sparkies wiring them, but the idea of I smell weird smells and that miniature potential nuke setting things off while I’m doing my thing.
The older type units, like the one in the video was prone to motor failures on startup. From what i heard from former co-worker, it could do a seriously loud bang.
I wanna see the bushings !
Do you mean the insulator bushings?
why not using a plain transformer instead?
Becase a transformer cannot change output frequency.
What is the 1KV@2KHz this converter generates used for?
It was used for induction heaters.
@@44Kilovolt Thanks!
Basically my lawn mower but bigger.
I think I heard that sound in "Forbidden Planet". Were those motors made by the "Krel"? ;
What is the purpose of this machine
It converts electricity to different output paramaters than the input parameters. In this case, the input is 6300 volts at 50Hz frequency, and the output is 1000 volts at 2000Hz frequency. The output is the used to power up induction heaters, which heat up metal cylinders that are then processed in hot press forging machines.
❤
I wanna hear a fast neutron reactor starting up next
I thought these things were outdated, why don't they use power electronics instead
Indeed they are, but the company wont replace them with static converters due to price cost, lenght of the removal/installation process (bigger half of the production lines wouldnt be able to produce) and probably the old 6kV switchboard would need a replacement too. So yeah, thats a big no for the company. But iam glad that they are keeping such old technology running, it has its own magic. Oh and btw there are 5 static converters too, 4 of them are from 1980's and one is new from 2019. They are just located in a different place than the rotary converters.
@@44Kilovolt And there's reliability. Such beasts like these are close to indestructible compared to power-electronics.
@@weeardguy Yes they are durable, but a soft starter would extend lifespan of the motor part. Burn out / short circuits of the motor windings were quite common during the startup as its the most critical part during the operation of the rotary converter.
i think you got the output stats backwards
🤔
Nope, they're correct. The generator output can be connected in two ways, either to get 1kV 500A output (which was used) or 500V 1000A output.
What is it converting? Phase count?
Three phase 6,3kV 50Hz to single phase 1kV 2000Hz
What's with the water fountain?
Its watercooling drain, it is made visible like that so the operator/maitenance can cleary see that the water is flowing. If water stops flowing or the flow pressure is too low, the pressure switches will trip the high voltage breaker and rotary converter will stop.
мне интересно сколько в этом мотор-генераторе ампер?
When the motor generator is starting up, it takes more than 150A from the 6.3kV line.
@@44Kilovolt The 800 kW MG unit I mentioned in another comment string had a 50 HP pony motor that provided initial rotation on startup. The starter on the mains was energized as the pony motor dropped out. The unit was used in a data center application, and a bypass circuit was wired to the control cabinet. The unit output breaker and the bypass breaker had motor drive mechanisms. If the unit failed, the breakers would operate in the 500 milliseconds before the frequency of the MG decayed below 60 Hz. This was back in the days of TTL control, and the logic worked quite well.
The inrush current is 400A from 6,3kV line
Just the startup sounds alone, made me poop a little 😳😶
Elon Musks SpaceX ship starting up [LIVE]
What does it do
It converts high voltage 6300V low frequency 50Hz to lower high voltage 1000V medium frequency 2000Hz which is used in induction heater. Induction heaters do heat up steel cylinders (usually) which are then forged in forging presses.
@@44Kilovolt thank you
@@markdi2You're welcome
K čemu tohle sloužilo- myslím konkrétní aplikaci, princip znám 🙂
Rotační měniče napájely indukční ohřívačky, ve kterých se ohřívaly ocelové kusy na požadovanou teplotu a následně se zpracovávaly v kovacích lisech :)
@@44Kilovolt díky. Tak i proto ta frakvence a jiná videa s motory kovárny. Díky. Teď už vše zrušeno?
@@kluculda Není zač. Bohužel měniče jsou už dávno ve šrotu, v kovárně se se řeší poslední demontáže zařízení, v dubnu by se měla začít bourat.
@@44Kilovolt takže areál označovaný jako Nová Zbrojovka za Tomkáčem?
@@kluculda Nene, je to areál Zetoru u Stránské skály.
Who needs 1kV at 2kHz?
@@Damien.D Induction heaters
Eventually it just makes sense to pay for the three phase electric service.
This is actually a very special converter, it's purpose is to output 1 phase power, with a twist. That being It changes the line frequency to 2000Hz for a induction smelter. It's certainly cheaper to use a spinning thing than huge set of inverter banks with loads of power transistors or FETs to do that.
@@theLuigiFan0007Productions And back in the 1960's there was no other option than using rotary converters. Such semiconductor converters were being made since early 80's here with GTO thyristors.
@@44Kilovolt
Indeed. And often the DC for things like electric trains was provided by Mercury Arc Rectifiers. The 3 and 6 phase ones look like a glowing blue octopus when in operation. Always very interesting to research the origins of various technology.
@ Getting a 3 phase mercury rectifier has been on my wishlish for several years.
@@44Kilovolt It would be so cool to see one in person. I gotta find somewhere that's exhibiting one sometime.
Chuck Norris could stop that with one hand
well I wised EVs made that noise
THX sound much less satisfying than this.
Well that was very Anti-climatic.
Freaking junk