02 - What is a Transformer & How Does it Work? (Step-Up & Step-Down Transformer Circuits)

View more lessons like this at www.MathTutorDV...
In this lesson, we will learn about the circuit element know as the transformer. Transformers use the phenomena of mutual inductance to generate a voltage in a secondary coil when a nearby primary coil is excited by a sinusoidal current.
The primary coil generates a magnetic field which interacts with the secondary coil and generates the secondary voltage. The physical law that explains this is known as Faraday's law from physics.
Transformers are used to increase or decrease a secondary voltage at the expense (tradeoff) of the secondary current.

[@silasado42]

You are marvelous lecturer, man! I will keep following up with you forever! I'm pursuing two courses at the same time, mechanical and industrial maintenance engineering in Nigeria in two schools full and part time... thanks mightily

[@TiberiusStorm]

This really helped me to understand how the voltage increase causes the current to decrease in a Transformer. I was trying to understand this for a new apprenticeship I got at Power Plant and nobody could explain it to me.

[@MathAndScience]

Awesome! Jason, MathAndScience.com

[@soesithu825]

Hoping this volume of AC Circuit Analysis to be released soon. Can't wait to study more about transformer.

[@JohnDoe-rm2gs]

Thank you very much for those explanations. You , Sir, are a very good teacher!

[@davisnganga6266]

The following was a question from a physics examination: “Using a diagram, illustrate the structure of a transformer which supplies 12 V when connected to 240 V mains. If this transformer takes 0.55A from the mains when used to light five 12V, 24watt lamps in parallel, find its efficiency.” i) Work out the question (5marks) ii) Identify the probable errors that leaners can make in answering this question (5marks) iii) Develop a marking scheme for the question. (10marks)

[@hadireg]

Great Professor! Great way to explain things. Thanks for sharing your valuable knowledge with the world!👍🙏

[@gregscheyd4131]

I am not sure what you are talking about , but sir , you are a CLASS ACT .....I will watch as many of your videos as possible ....!!!!

[@enricoalbor6588]

Concised, detailed...maraming salamat😊

[@fast_gtr]

I really appreciate all the circuits videos you have. I have purchased a few courses. However, I cannot find this specific course explaining transformers on your website. Could you send me the link to it?

[@rolandha912]

You're teaching is clear. Thank you sir. From Philippines

[@naimhasan2333]

Thank you very much for your tutorial.This video is very much helpful for me.

[@MathAndScience]

So happy you liked it! View all my Lessons and Courses! Visit: www.MathTutorDVD.com

[@albertomontoya4316]

Excellent , Jason. I will purchase the whole course

[@lalithsamarapala2055]

Excellent

[@BentHestad]

Super lesson! Thanks!

[@sgifford1000]

Well, done! I’ve always been puzzled by transformers and now I realize they are not ideal.

[@junieamboy4825]

Thank you for information that you have us.

[@shawncalderon4950]

Amazing job! The best lecture on the subject!

[@sgifford1000]

Do you have a presentation on how to compute the impedances?

[@alanx4121]

Interesting statement you made: The magnetic field of the polarized iron creates the magnetic field which is added to the induced field that causes the polarization of the magnetic domains in the first place. Veritasium made the same statement regarding energy transfer in an electric circuit: energy is transferred by the electrostatic field of the EMF source and the fields of the free electrons which are 'polarized' by the EMF.

[@alanx4121]

'holcomb' energy systems claim they have developed a system that taps into the spin energy as an energy source.

[@kokimkigunku3417]

Thank you very much for your teaching

[@nick848]

I need the rest of these lessons

[@lilnizo]

thank you very much, well understood pls waiting to see more from you

[@assabjorn]

Thank you mr keeper on

[@seawillows5268]

Thank you, Teacher

[@johndonne2181]

please do the Chemistry all the way to volume 24. I wash all your five volume and waiting for your next chemistry volume

[@francismannion7075]

That was excellent , thank you very much.

[@MathAndScience]

Welcome! View all my Lessons and Courses! Visit: www.MathTutorDVD.com

[@jonathanbacorro352]

i have a quiz next week about this topic. THIS REALLY HELPS ME. but i cant understand about the dot convention. 😢

[@abstractapproach634]

x dot == dx/dt the derivative of x with respect to time. (Think velocity in x direction) x double dot == d²x/dt² == d/dt(dx/dt) the second derivative of x with respect to time (Think acceleration in the x direction) x triple dot == d³x/dt³ == d/dt(d²x/dt²) the third dirivative of x with respect to time (Think jerk in x direction) And so on x w/ n dots = d^n/dt^n(x) the nth derivative of x ALWAYS with respect to time Very similar to prime notation, although the operand of x' myst be specified, x dot is always with respect to time. And in the best notation of all, Leibniz, everything is specified.

[@fakephysicsengineer6188]

what book reference do you use?

[@musnathilahi]

Wonderful Lecture!!! Thank you

[@user-fn2xz1wo8b]

Can you sir plotting laging and leading diagram of current and voltage ?thank you sir

[@luscent3737]

Fantastic explanation

[@dorel49]

is it possible for a step down transformer from 220 V to 110 V to have only three outputs?

[@bobdee2147]

Enjoyable video, but, where can I find the non-ideal transformer video? I am especially interested in quantifying the load complex impedance as seen at the transformer primary input.

[@UnimaxTechnology]

All Good ...Thanks For Everything

[@tfialdrin9747]

Does all devices need an AC signal but the Power source is DC, does always need a flipflop circuit as an AC generator of the circuit?

[@Festus2022]

Terrific lecture!! Thanks a lot.

[@josephhall704]

I have a couple of questions. Since there was no reference made to wire sizes used to wind the transformer. 1) were the input (primary) and output (secondary) assumed to be the same size wire? 2) increasing wire size also increases current flow so would increasing wire size on the output (secondary) help negate current loss while stepping up voltage? I know that also makes the transformer larger as a result. This was a very informative lesson! Thank you for it!🖒I liked and subbed. ;)

[@krtgaragegeetech5342]

Following her

[@gregscheyd4131]

I am not the sharpest pencil in the box , but I say IRREGARDLESS OF WHAT YOU DO , you cannot get the equation to change ; there is no FREE LUNCH ..... it just dawned on me about 2 days ago , when JASON was lecturing on TRANSFORMERS , that even if the EQUATION is made up of VARIABLES , AND NOT A SINGLE CONSTANT , THE EQUATION ITSELF IS THE CONSTANT , AND THERE IS NO CHANGING THAT , TRY AS YOU MAY ....that is so DANG KOOL !!!!!

[@jimpeachey7007]

Hi, I found this Transformer overview very useful and was really looking forwards to the follow on detail and examples. I noticed that you said 2 years ago "Very sorry but I have not filmed the remaining lessons yet. I will do that sometime in the spring. It will be AC circuits vol 7 and 8". Can you please provide an update on progress and when you may complete? Many thanks and excellent content.

[@gregscheyd4131]

MASTERFUL !!!

[@timmytim9054]

Do you realise how amazing you are

[@peacematthew909]

I hope he does..

[@ThePvcralph]

The way the primary input was drawn looks like the source is DC with the + and - . I thought a transformer will only work with AC?? Thanks for the excellent video.

[@bukskinner]

check out the comment at 2:05 "it's a sinusoidal source"

[@alexanderquilty5705]

You are correct but we don’t always draw a sine wave for a sinusoidal source. Often times we just draw the plus or minus as a reference and then the phasor associated to that independent voltage or current source. The plus and minus at this point is just simply a reference.

[@alexanderquilty5705]

Remember that the plus and minus doesn’t always refer to a battery source, it’s just a voltage source. Only when you see the long and short “plates” can you assume that it’s a battery.

[@mikechirombo8594]

you are simply the best...thanks a lot

[@mansfieldj.pokana7720]

How does an inverter obey the law of conservation of energy?

[@mohammedfawzikharroub8482]

where can I find the rest of the course, I could not find it on the website. Thank you

[@anthonycooper6963]

I was looking for it as well

[@alexanderquilty5705]

Same here

[@Festus2022]

I don't see this lecture on transformers OR THE FOLLOW-UP LECTURES on transformers in the membership series lectures. Don't see it under circuit analysis lectures. How do I access them? Don't mind paying for them, but I don't see them

[@fredgarvin4482]

real world question: i plug in a power pack/power supply for a electronic device into the wall socket. Now since it is a transformer the hot and neutral wires in socket are connected and create a circuit. now if the circuit was just a single wire loop it would be a short circuit and heat up and hopefully trip breaker. now the transformer is still a loop of wire and if the supply is not connected to device their would be no load. so is the reason the one side of the transformer does not act like a short circuit because of the impedance of the coil/inductor?

[@hussain6953]

Excellent lesson.

[@aurangzaibkhan543]

Great

[@lloydbrown1512]

Thank You!

[@mdfuadfahimulhaque2478]

this was a massive help, thanks

[@DELLISTX]

Excellent!

[@jyu7127]

Your right sir you cannot get free lunch if you rely on the transformer alone but theres a way to magnifye the current.power company did that already...the key is tha SPARK GAP.

[@umasankarloganathan5254]

i have a doubt reply immediately. suppose if they given supply voltage 100v, 2:1 ratio and primary side impedance is 0+j30 what is the primary current

[@ohazulikelevi2260]

Very educative

[@MathAndScience]

I really appreciate it! Jason, MathAndScience.com

[@batistafrose6009]

Very good video

[@GODCOR]

wow. damn 19:54, pretty cool. blew my mind

[@gregscheyd4131]

MINE TOO , GODCOR .....no free lunch here !!!!!....even though so many of these equations are made up of nothing but VARIABLES , THE EQUATION ITSELF IS THE CONSTANT : THE RELATIONSHIP BETWEEN THE VARIABLES ....!!!! MINE TOO !!!!

[@user-fn2xz1wo8b]

Sir have you informations about prime voltage (v",v').I can't distinguish between them .I'm mechanical engineer

[@mikaeldanielsen4168]

wich volume is this lesson under? AC or physics???

[@mufakkirhussain2816]

why are you so competent?

[@ryaneickmeyer6191]

Great! Great video! Thank you!

[@kutijugadzama4508]

Basic introduction to digital multimeter verses analog multimeter

[@agbomichael384]

Why do you put the dot at the beginning of the transformer sir.

[@mmaad2165]

What is the difference if the winding was in clockwise or counterclockwise? And why one of the winding ends become phase and the other end become neutral??

[@alexanderquilty5705]

It changes the direction of the flux of the magnetic field.

[@alexanderquilty5705]

I think lol

[@notmubarak7915]

Thank you

[@pedramparsian3945]

Great, thank you 👌

[@GODCOR]

can someone link me to the rest of the series

[@tedlahm5740]

Please tell the country leaders. No free lunch. Wonderful explanation.

[@yusrilpratama7307]

what refference did you used ?

[@poconagean]

still waiting for the rest of the lessons.

[@elitesoccerblogs4947]

can someone help , what could cause the secondary side of a transformers output to drop its voltage ?

[@gregscheyd4131]

I have NO IDEA in a step - up transformer , but I CANNOT HELP THINKING ABOUT RESISTORS AND RESISTANCE , ON THE PRIMARY SIDE ...???

[@racquelsabesaje4562]

on and off

[@shaun7156]

He kinda favors one of the Baldwin brothers.

[@josephhall704]

I think he looks like Jeffrey Warren Daniels myself. I know Jeff Daniels is in the movie dumb & dumber so I mean no disrespect there! This guy is definitely NOT dumb!!!

[@assabjorn]

❤

[@mohammedfawzikharroub8482]

from which volume is this lesson and which category. I couldn't find it on the website. Could you please tell me where can I find all of the following videos thank you

[@MathAndScience]

Very sorry but I have not filmed the remaining lessons yet. I will do that sometime in the spring. It will be AC circuits vol 7 and 8

[@harrisgodwin8137]

@@MathAndScience Hey Jason your videos are wonderful and have helped me very much. I was wondering where you were on filming the remaining lessons for this section.

[@duvi]

@@MathAndScience is not there yet, any update?

[@angelachen641]

@@MathAndScience I am a member of your website. Your course saved me. But now I really need your vol7 and 8 to pass my final exam... Waiting for your update.

[@alexanderquilty5705]

Still nothing 😪 I suppose it was good while it lasted..

[@BarryBranton]

What about resonant circuits? Say a parallel-series resonant circuit...

[@ChaosContrl]

A transformer is a component to find the optimal prime number of a computer :3

[@racquelsabesaje4562]

transformer control electricity

[@kirchofffontaine6845]

subtitle please!

[@tomjoad6993]

This is how wireless charging works, isn't it? It's using induction.

[@yoavshumacher5724]

wait, so is it possible to get free energy?....

[@marshmallow5127]

"No free lunch" lol

[@atomadam5869]

You been listening to my convos huh lol

[@truthteller381]

👍👍👍👍👍👍👍👍👌👌👌👌👌👌

[@SeanLeonDrumz]

Your circuit indicates you are using DC (+,-) You cant transform DC voltage.

[@Krythus]

He says at the start it's sinusoidal my dude

[@abdosaiah6354]

lllllllllove uuuuuuuu

[@MathAndScience]

Awww thanks!

[@GODCOR]

32:10 lol :D

[@taslimaakter3071]

Autobots roll-out

[@boniphacewilliam3476]

grdj

[@chinmayvashishtha]

No free lunch (ಥ﹏ಥ)

[@GreenVtecintegra]

The caring storm accidentally bathe because swing coherently rely unto a busy stone. deep, nonchalant station