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@EngineeringFunda2 жыл бұрын
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@dvrblacktech5 жыл бұрын
Ultimate sir....today is my electronics exam.. now I m capable of explain this by seeing this video..... well understood...thank you sir....
@hemchandmovva44603 жыл бұрын
TQ. SO....MUCH .. ....SIR IT.......IS....THE....ONE.......OF.......THE.....BEST.....EXPLANATION.. SIR we all r support u sir
@EngineeringFunda3 жыл бұрын
Your positive comments motivates me, Thanks and welcome 🙏
@hiteshdholakiya8414 жыл бұрын
If R is more than alfa is more, If R is less than alfa is less.
@EngineeringFunda4 жыл бұрын
Yeah If R is more then current is less so alfa will increase and visaversa
@avinashmisal9544 жыл бұрын
Hitesh bro insted of than use then bcz its changes meaning of sentences..🙏🙏
@chittychittis33573 жыл бұрын
@@avinashmisal954 yes, first I confused
@avinashmisal9543 жыл бұрын
@@chittychittis3357 😊👍
@yashashs31913 жыл бұрын
Yes there is a mistake in the video
@shrutimukherjee83788 ай бұрын
He save us at ultimate cost at the exam time !!!😢❤
@EngineeringFunda8 ай бұрын
Your Appreciations, care and share matters a lot to me. #EnginneringLove. All the subjects playlist of Engineering Funda is available in comment section. Share it with your friends to support us. Your positive comments motivates me and person like me get boosted by my students feedback. Thanks and welcome 🙏
@roadlesstaken67904 жыл бұрын
There should be a correction - Firing Angle is proportional to sin_inverse(R), therefore if R (the variable resistance) increases, firing angle will increase.
@023_debarghyadebnath310 ай бұрын
correct
@dewalpraveen234 жыл бұрын
Thank u sir it's really helpful for diploma and engineering students
@EngineeringFunda4 жыл бұрын
Most welcome
@sandeeppandit6695 Жыл бұрын
Thank you sir for your efforts
@EngineeringFunda Жыл бұрын
All the subjects playlist of Engineering Funda is available in comment section. Share it with your friends to support us. Your positive comments motivates me and person like me get boosted by my students feedback. Thanks and welcome 🙏
@DarkRedZane3 жыл бұрын
Thank you sir! All was crystal clear except to the Resistor-Alpha part. Other than that it was well explained!
@mdsarfarazhussain28724 жыл бұрын
Thank you Sir , I am getting to learn a lot about the subject . Your process of teaching is very helpful , and thanks for giving time for snapshots 😊 ...!!
@EngineeringFunda4 жыл бұрын
Your positive comments motivates me.
@maddkraut034 жыл бұрын
nice presentation
@MANISHH4 жыл бұрын
VERY NICELY EXPLAINED SIR
@nickjung11995 жыл бұрын
if you increase the value of the potentiometer (R) you reduce the current and so it should take longer until the SCR fires, so alpha should increase with increasing R?
@edwinr43785 жыл бұрын
yaa
@chandankumar-vi3dw4 жыл бұрын
Yas
@sudeshna.m7289 Жыл бұрын
As R increases the current reduces and it takes more time to reach the required value of gate voltage that is required to turn in the SCR. The angle at which SCR is turned on is called firing angle (alpha)
@sudeshna.m7289 Жыл бұрын
This if R increases the value of alpha would also increased.
@MrYounisah5 жыл бұрын
increasing of r in the gate circuit will increase firing angle alpha , decreasing of r in the gate circuit will decrease firing angle alpha
@rakshithms26385 жыл бұрын
Thank you sir.. session was helpful
@vipuldhokte65375 жыл бұрын
As value of resistor increses trigerring angle will also increases. Sir you say wrong resistor increases firing angle decreses
@DAECAkashKR5 жыл бұрын
Yes bro u are right....by increasing R current decreases so the SCR turn on lately and alpha increases
@shubhankarghosh4 жыл бұрын
You are wrong!! If r increases then alpha also increase and vice versa. When r is low then the gate current is sufficiently large to trigger the device instantly, and when R is high then gate current is small and the device will trigger slightly later
@unorthodoxinsaan23363 жыл бұрын
Yes yes you are right bro because I were also thinking that...
@hemchandmovva44603 жыл бұрын
@@unorthodoxinsaan2336 same situation bro I'm also face this situation
@abhilashps77323 жыл бұрын
that is what he also said bro when r is low ,alpha is low too he just said it another wat that's it😬
@shubhankarghosh3 жыл бұрын
@@abhilashps7732 he didn't said that, watch 10:18
@mydukurusravan19913 жыл бұрын
Explain about trial firing circuit using diac
@EngineeringFunda3 жыл бұрын
It is there in my playlist of power electronics
@s.i.73553 жыл бұрын
Sir , Is thyristor firing circuit is same as trigger scr uring resister . Sir please make Vedio about Thyristor firing circuit..
@s.i.73553 жыл бұрын
Sir please tell me
@EngineeringFunda3 жыл бұрын
It is one type of thyristor firing
@arjun45155 жыл бұрын
Explaining is very clear to understand...but my question is ?)why silicon is use in SCR ...?
@EngineeringFunda5 жыл бұрын
It is Semiconductor
@arjun45155 жыл бұрын
@@EngineeringFunda i know sir but we can also use to germinium instead of silicon ..but in all operations why silicon is used...
@EngineeringFunda5 жыл бұрын
Germanium has less power handling capacity compared to silicon. So in most power electronics devices silicon is used
@arjun45155 жыл бұрын
@@EngineeringFunda satisfied...👍
@kalyanidevaraju13695 жыл бұрын
@@arjun4515 lekage current for germanium is more when compared to silicon so we prefer silicon instead of germanium(silicon controlled rectifier instead of germanium controlled rectifier)
@jaisiddhisuperpowerpltd1872 Жыл бұрын
Sir in our circuit we are facing problem in which current show in multimeter is 0.7ampere but it is showing in tester every much current and it is shoking Explain what is the problem
@veeresh.b.vveeresh4861 Жыл бұрын
We need some calculation related to R triggering.
@pankajchauhan5180 Жыл бұрын
BRO PLEASE ALSO TELL WHERE YOU ARE TAKING OUTPUT VOLTAGE ACROSS WHICH TERMINALS
@azheennazhad22055 жыл бұрын
why is it between 0-90?
@yashashs31913 жыл бұрын
that's intuitive, if alpha cannot be more than 90 cuz, if it was then it means it used to get triggered at a particular voltage that comes after 90, but u ll get the same valuee before 90 also
@SteVen-be7ic5 жыл бұрын
I don't understand the purpose of Rb. It takes away some of the triggering current, and when the thyristor is activated, it is also supplied from the main circuit?
@adarshadarshsaxena6 жыл бұрын
In case of negative half cycle, the SCR will behave as a open circuit.But there is still a path for the current through resistance Rmin branch. So how can the load current be zero?
@EngineeringFunda6 жыл бұрын
You see diode which is OFF during -ve half cycle.
@adarshadarshsaxena6 жыл бұрын
yeah, you are right, missed that thing. Thanks!
@surajgheware37095 жыл бұрын
From scr characteristics if Ig is more Vfb is less and scr will trigger earlier but in this case Resistance is reducing the value of Ig then Vfb should be increased and scr will trigger delay by angle alpha..is it correct??
@Zaim123635 жыл бұрын
Dear sir if it is possible post practical videos ,related to power electronics .
@dalenassar91526 жыл бұрын
What about the diode (D)? What would happen if it was NOT there? Thanks for the great videos!
@Silent_Shishya5 жыл бұрын
It is to prevent Gate-Cathode reverse bias to exceed peak reverse Vg during -ve half cycle
@siddharthshah49296 жыл бұрын
I cant understand that why they put secod SCR. Or use of othe SCR..
@birusintianilbabu19212 жыл бұрын
Why alpha is taking only 0-90 and what happened if the alpha is more than 90 degrees
@prasunbiswas80255 жыл бұрын
why the firing angle is within 90 degree?
@sudarsanmanohar43955 жыл бұрын
After 90 the volt decreases
@yashthakur69273 жыл бұрын
Why to limit gate current if we want to trigger scr
@techasthra44212 жыл бұрын
SIR CAN U GIVE THE NOTES OF EVERY VIDEO PLEASE I WANT IT
@EngineeringFunda2 жыл бұрын
All possible notes are there on my android application engineering funda.
@AdityaRaj-dp1no4 жыл бұрын
sir can you explain the use of diode in this ckt?
@MohammedUmar-ow2pl11 ай бұрын
❤
@EngineeringFunda11 ай бұрын
Your Appreciations, care and share matters a lot to me. #EnginneringLove. All the subjects playlist of Engineering Funda is available in comment section. Share it with your friends to support us. Your positive comments motivates me and person like me get boosted by my students feedback. Thanks and welcome 🙏
@technicalelectricalenginee24103 жыл бұрын
Sir 12 thyristor parlal conation kese kare
@Jharkhandtakoriginal5 жыл бұрын
Is scr off duration in 14:00min time is currect or upto before firing angle
@user-ei7yt7tg1i4 жыл бұрын
Different types of rating of scr ea bala vidio di gia
@arundhatipatil42644 жыл бұрын
Why alpha is from 0-90 degrees sir ??
@dewalpraveen234 жыл бұрын
It work as a phase control circuit ??
@yogesh95455 жыл бұрын
Applications of r triggering method
@omkarhonrao15822 жыл бұрын
Sir please also share theory of this topic .
@akmphy3 жыл бұрын
What do you mean by "firing angle"?
@EngineeringFunda3 жыл бұрын
Angle at which we trigger scr
@krithikaa4056 жыл бұрын
how resistance value determine the firing angle.?we need to cross only the threshold voltage of gate.if R increase I decreases how alpha decrease?,please explain
@EngineeringFunda6 жыл бұрын
If R increase then I decreases then forward break over voltage will increase so alpha will decrease
@krithikaa4056 жыл бұрын
if alpha decreases means we obtain nearly full waveform. it means by increasing R I decrease ,once the scr is triggered how alpha value depends on magnitude of current?.how forward break over voltage increase will result in the decrease of alpha?I am still not clear,I surfed through net I couldnt get the answer.Please explain Sir
@EngineeringFunda6 жыл бұрын
See the characteristics of SCR , as Ig increase Vfbo decrease.
@ankitanand95745 жыл бұрын
@@EngineeringFunda Sir ....... Many students in the commnets have asked this question about the relation between Value of Potentiometer Resistance(R) and The Firing Angle(Alpha). IT WOULD BE HELPFUL YOU PROVIDE US A DETAILED EXPLAINATION OF THIS IN ANY VIDEO OR IN THE COMMENT BOX. HOPE FOR YOUR REPLY SOON
@UmarFarooq-yp5ym4 жыл бұрын
Without stablizing resistance, can we operate scr safely
@EngineeringFunda4 жыл бұрын
Nope
@UmarFarooq-yp5ym4 жыл бұрын
@@EngineeringFunda can we give voltage by 1.5 volt cell (AA size) to scr gate/cathode with potentiometer and Without using Rmin and stablizing resistance safely??
@njkalita63244 жыл бұрын
Sir is speed control of dc motor by scr is same with this?
@EngineeringFunda4 жыл бұрын
Yes, you can change your load with DC motor
@ankitanand95745 жыл бұрын
If the value (R) INCREASES ...... The GATE CURRENT (Ig) DECREASES............ This results in the INCREASE OF FORWARD BREAKOVER VOLTAGE OF SCR(VfBO INCREASES) SO THIS SHOULD INCREASE THE FIRING ANGLE (ALPHA). Then why it is Decreasing ??
@mohammadrameez35084 жыл бұрын
I have to many questions sir . R (potentiometer) ko Kya variable resistant bol skte hai .agar ha to Rmin lagane ka faeda Kya hua R(potentiometer) ki value badane se bhi to current control ho skta hai . and Rb kaese stable krta hai smjh ni aya
@mohammadrameez35084 жыл бұрын
Aur sir hm agar Rmin se limited gate current bhej rahe hnto Rb ko gate resistance stabilize krne ki Kya zaroort h
@055_tusharlad73 жыл бұрын
Plz draw current waveform
@Veerkushwaha-s5s5 жыл бұрын
Sir , how voltage across the src is 0. When there is load voltage. Plz sir.
@EngineeringFunda5 жыл бұрын
If it is ON, it will short circuit, so voltage will be zero
@HITESHTHAKOR-js2dh3 жыл бұрын
But alpha ko calculat kaise kare jaise manlo hame alpha 30 degree chahiye to R kitna rakhna padega ?? Kisiko idea hai
@nickjung11995 жыл бұрын
what is the derivation for the equation of Rb?
@HITESHTHAKOR-js2dh3 жыл бұрын
What about calculation??
@mukundchippalkatti60616 жыл бұрын
Why is the angle Alpha limited to 90?
@Silent_Shishya5 жыл бұрын
Because the source voltage is maximum at 90° and Ig(min) has to be achieved between 0-90°
@Jharkhandtakoriginal5 жыл бұрын
What is the ratio of R/Rmin
@veedapusiddhartha48954 жыл бұрын
Sir how alpha decreases as resistance increases
@shreyasingh57504 жыл бұрын
It is wrong. Engineering Funda has reply to other comments
@pranavjs3 жыл бұрын
there is a mistake,if R is more,alpha should also be high...directly proportional
@EngineeringFunda3 жыл бұрын
See the pinned comment.
@jwngdaoboro82193 жыл бұрын
Upload the notes you have written
@pramvarma18514 жыл бұрын
Isme load phle kyu lagaya???
@chandrashekhar13015 жыл бұрын
why so many ads
@EngineeringFunda5 жыл бұрын
It gives me some earning
@adarshmondhe65266 жыл бұрын
There are only three wave forms
@shivuvhemanthkumar60055 жыл бұрын
Sir can send your notes
@EngineeringFunda5 жыл бұрын
You can take it from Android Application Engineering Funda
@arvindkumarrawat23664 жыл бұрын
Machine notes
@shivaprasad35125 жыл бұрын
Not satisfied
@SubhamDas-kc3cx5 жыл бұрын
Vogasss
@silenterror59295 жыл бұрын
Gate ke current(Igm) ko Control kiyu kar rahe hain .... jo Gate ki Firing hai kiya wo Current par Depend hai ...????