How does a Thyristor work?
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- Опубликовано: 27 ноя 2019
- Do you know that a semiconductor device called a ‘thyristor’ solves the huge issue of power transfer from a generating station to consumers located far away? Traditional AC power transmissions face huge power losses and also suffer from the issue of stability and controllability. For long distance power transmission, HVDC technology is the right choice. In HVDC, bulk amounts of AC power have to be converted to DC with the help of converting stations. After that the DC power is transmitted to the consumers. This important task of conversion is performed by a unique semiconductor switching device called a ‘thyristor’, more specifically by silicon-controlled rectifiers. Let’s explore how a thyristor works.
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I designed and built a lot of gear in the 70s using SCRs and Triacs in disco lighting control gear. I knew how they behaved very well but never really knew the actual way they operated. I see now how the SCR anyway worked.
I wish we had benefited from such audio visual aids when I did electrical engineering (late 60s). At the time, we were only told the _outcomes_ and then had to learn the mathematical theory by rote. I don't think a single student graduated with a true understanding about the ionic or molecular issues. At the time, thyristors were described by or lecturers as a mysterious semiconductor that could switch large currents - and that was about it. They didn't even refer to Shockley as the progenitor. Many applications, at the time were using huge thyratrons - some were water cooled. When they burst, the fun really started.
@@facitenonvictimarum174 Shockley was indeed a racist. He was a big proponent of eugenics. He not only believed blacks were incapable of being as intelligent as whites, but that he and other "geniuses" had superior genes to the general populace and openly talked about giving his semen to a sperm bank developed for people with high IQ. As an EE student, I respect him for his discoveries, but the dude was from a different time and stuck in his beliefs, that's for sure.
@@SuperSaltyFries Thanks for this information. Henry Ford, the inventor of chain work, was antisemite.
600 66
Instablaster...
@@facitenonvictimarum174 "white supremest, about like Trump" lol trump was no white supremacist, unfortunately
An improvement would have been to explain the difference between a Thyristor (SCR or Silicon Controlled Rectifier) and a TRIAC.
A TRIAC is basically two SCRs in antiparallel - so it is possible to control both half waves of AC power at the same time.
Thyristors are utilised in converting AC to DC and viceversa.
It is possible to build thyristors with thousands Volts Vr, and ten thousands Ampere of controllable current. This is not feasible with transistors.
Thyristors are also widely utilised in railroad rolling stock.
Thank you for the video...
Two SCRs can be connected to form a high current triac, because single constructed triacs are limited in power.
Un tiristor no es un SCR, pero un SCR es un tiristor.
Los TRIACS, los SCR y los DIAC son todos tiristores. Los tiristores son una familia, no un componente.
Thyristor its a family not a component.
SCR, TRIAC and DIAC are thyristors.
I"ve seen a lot of videos try to explain transistors, this was the best one I've ever seen.
Amazing animations, they make these concepts so much easier to comprehend
Wow, so easily explained, one of the best videos you ever see about thyristor, thanks for amazing work
Great works, meticulous explanation, great job. Kudos dude! Keep it up !
Thanks for the explanation LE, I never heard of a thyristor before and it was really as clear as mud to me how it works and why but, just like all things electronic it's a massive mystery.
Wow the animation on this was great. Really helpful for visualizing electron flow through a semi conductor.
I am thyristy for knowledge. Great video 👌
me too but the large breasted woman at the beginning is quite distracting
I just want to see electric cars with graphene batteries, is that too much to ask?
Angryupvote
Nice pun
@@An.Individual lol
Wow that's really a very good animation of 3D wafers in a semiconductor. Really helps a lot in visualizing. Great video!
2:29 Funny how they explain "doping" with syringes.
That's pretty much how they're doped.
Nnnoooooooooooooooooo😂😅
lol, and here was I imagining some kind of electron gun
😀😀good analogy
Great video! Just one suggestion: I don't understand how the described device turns A.C. to D.C. and vice versa. Thanks for the video!
it is because , during reverse bias no electrons flow thus converting it into unidirectional flow or DC
Bud Step it's just working as a diode in a special manner
its one big multi-layer diode. so they just use it in a big rectifier array to convert ac to dc. single layer diodes would burn out if you reversed the current at that high of voltage. so adding more layers significantly increases the reverse current stopping capacity. but because of the extra layers; you have to pre-charge each extra layer in order for it allow current flow in forward direction. you could do the same by putting lots of single layer diodes in paralleled but in order to split enough voltage off not to burn them all out you would have to use way too many diodes to be economical. this is just a way of making super high voltage diodes with much less silicon.
further more when the current is going forward the thyrister works like a closed switch. but when its going backwards it acts like a big capacitor. the LC inductor is not to help turn off the thyrister so much is its to help ease the massive voltage spikes you would get when the current reverses again and that capaciter turns back onto a switch with extra voltage pushing the capacitor charge out.
the result is that a thyrister rectifier sends ultra high voltage DC pulses down the wire instead of AC or constant DC. the high voltage pulses have the same long distance transmision properties as AC but without the current ever fully reversing, thus causing flux in the wire to reverse, thus cause the wire to expand and contract and generate lots of heat and lose energy.
also the same way that most communication lines work. DC pulses for long distance... with diferential signals to detect voltage errors.
@@guymella that was a great explanation!
What about DC to AC
That's the best way for teaching any devices....thank you so much for this brilliant animations.....
Excellent animation! Best explanation i have seen so far! Thank you
This type of animated knowledge is required for the future generations
Great and full clarity vedio
Beautiful animations and explanation of the functioning of thyristors. Thank you !
Nice Graphic Representation... Thanks for hard work 😍
As always, another excellent video from this channel. Just one precision: even when a diode or a thyristor is in high resistance mode, they are "working". In other words, "being working" is not synonymous with "being conducting current".
awesome video, made concepts clear the n distilled water. best channel on youtube.
Amazing work, I'm so grateful for the time you must have put into making this helpful video!
Excellent exposition, understood completely. Thanks!
This video very helpful. It's help me to do my job. Thank so much. I have been waiting for your next video
Thanks for the information!
Thanks for the video, it has really helped!
Thank you for explaining easily 💫
The concept of thyristor is a lot harder for me in the textbooks. This made it a little more intuitive but full insight of thyristor is still unclear or missing.
text books are mostly wrong as they dont include aether in it's explanation. Is like talking about the chiken while hiding the egg
change book 😄
The visual demonstration was awesome
I can't believe how easier I understand my lesson by watching this video. thanks a lot!
Well it explained better than all my high school textbooks, although I understand majority part but seeing this made me understand completley. Before I had to reply on memorizing but now that I understand its has become easy to memorize.
did electronics engineering...bt now i actually know the working of SCR... thnks....
I was waiting for your video
thank you
i wish this was out when we were studying engineering, but those times youtube and the likes werent a hit yet, still this makes visualizing very easy to understand theories. i was made to memorize formulaes which didnt even fully understanding the working principles. this should be the standard of teaching
I love the way of teaching
Thanku so much team learn engineering
Good video and good learning.
Really a nice animated video of SCR. Thank you Sir ❤️
Wow cool bro u made it so simple, keep it up
Great Video , we learnt lot of things
Thanks for giving the visual effect of electrons and hole movement to explain SCR concept .
Appreciate the video, Learn Engineering!
Thanks a lot for Making My Concept Deeply Strong 🙏
I never even knew these existed... very complex and thank you.
Good animation and explanation
that's a great video, thank you for posting :)
Very well explained and shown!
(But I was just wondering if those circuits shown will run on teeny tiny Eveready Batteries as well as your Duracell. I have all these semi-microscopic batteries Iaying around doing nothing ... )
Very well made video!
Learned something new today... never thought about this before but now it's tucked away in the memory banks.
Wonderfully explained
Plz make video on how HVDC converters station work
ruclips.net/video/DFQG9kuXSxg/видео.html
@@tripplefives1402 How are diodes and thyristers "stacked" to handle more voltage? Are they connected in series or parallel?
this is extremely intuitive
Bravo, bravo! Super intelligent video.
Excellent explanation
Thank you for your information.
These type of videos compansates the huge gap of efficiency between theories lectured in the class and the understanding of the delivered lecture by the learner
Thank u for this video.. my doubts are gone.. 🙏🙏🙏
Such a great video.
Awesome video
Thanks a lot for sharing
thank you so much great way of explanation
Thank you for this awesome video. This is the very first time I understood this whole issue. Either one or two barries layers. And the external voltage source acts as a trigger to start conduction. Wow, now I just have to figure out what the "Nullkippspannung" is and then off I go.
Thank you for sharing this video
this video is better than most of the teachers teaching this specific topic.
Thank you. We are waiting for Capacitors and Inductors.
Thanks for your video.
Superb explanation , make videos for other power electronics devices too !!
Tnx sir. Your explanation is the best 👌🙌❤
Great explanation u deserve a like
A universe-big thanks for this amazing video 🙏
We need one of these videos on Finfet and Tfet, please.
This method is the effective way of teaching
i finally got my deepest doubt cleared thanks
Wow! Great concept!
great visual aids for learning.
Big fan of yours...I LIKE YOUR 3D MODEL...Because it helps me so much...I request you to make more Video at electronics...your follower and subscriber will increase...
very helpful thank you
Very nice videos are posted on this channel
Great explanation thankyou lot 🤗
Great video 😊I love it.
Great video
Waao very clear explanation
It's a use full video 👌
Thanks for the video. I am in 9th standard but you gave me the feeling of an electric engineer. Thanks
Lucky guys. You have all this.
I would love to know some variety of things like this
I like how they correctly show the flow of electrons through a battery.
Most people think the electrons flow from + to -, but the opposite is actually true.
Excellent.... video....
Creative Tip to switch the thyristor into off mode .that s why it s No need to set any drivers in it . Nicely explained nice video.
Cool! I don't fully get it, but it's neat as heck.
very nice animation
Visualization is best 💯👍
thank you my teacher
Great video, but I didn't understand the explanation of why doped p-layer of thyristor that becomes n-layer saves its state after removing secondary power supply. For example, in bjt, as u mentioned, we always need a secondary power supply if we want bjt to be switched on.
There is essential 2 BJTs with the NPNP structure. The current most flow through all junctions. Some of those junctions are the bases of each BJT and it basically has a positive feedback loop through the structure, keeping the "BJTs" on or biased until the current is removed. The result being you basically have to pulse the gate once on thyristor to trigger it on and it will latch on.
Thanks a lot ❤
Thank you!
Bro which app use for audio please reply.
Thanks so much
You should now do one explaining VSC and MMC converters 🙏
Thanks you very much!!!!
what a perfect video
*Please upload more videos on Power Electronic devices*
Fascinating.👍
Thank you
Can you make video on traction....you explain really awesome