Gordon I wish I had your videos in the 90's where I was learning in my technical college in Poland. Because of the materials which you produce is so easy to undesrsted electric principles. In the 90's I had to learn from the books and somtimes it took me so long time to undestand and make sure that I undestend correctly a lot of these principles which you showed. What you made is incredible just only few minutes isteead of months or years is needed to learn the same quantity of materials. Your materials should be provided to many many schools in the world as the basic curruciulum. Best regards Piotr
Great stuff Dave. Always a treat to find new material posted. Love forwarding your material to the up and comers as well as reviewing myself! (And all glory to god indeed!)
I'm just a lowly vintage tube guitar amp tech and want to know every detail of every part I deal with, you have helped me tremendously and now that I understand this great video I can watch the next one confidently.
The fact that this has less than 10k views is criminal, but it also helps me feel secure in my job. If the average TH-cam viewer can ignore these fascinating and amazingly well-done videos, perhaps there's hope for us yet. ❤ Keep it up, champ!
Excellent Dave! Thanks for making this subject much easier to understand. Your explanation was clear and understandable combined with the visual...Perfect!!!
I’ve always thought of voltage level induced into the secondary as simultaneous overlapping voltage addition & subtraction (ac) for each winding, equaling out to the total amplitude of the induced sinusoidal waveform. I like the series battery analogy better though because it’s easier to picture & understand, even with the DC distinction. Clicked with my brain anyhow, so thanks!
Hey Dave I know you have done a ton of videos, your a good instructor nd have a organized way of explaining things, I was wondering if maybe you could give us se lectures on some grounding ?
Dave. Great video. Can you make a video explaining separately derived system on generators. When the bobding on the grounding wire needs to be disconnected fron the generator neutral. Thanks for taking the time to provide this great information.
Hello Dave. Just wanted to say how great I think your channel is. I'm a college lecturer in electrical installation here in the UK and I would love to build something like that so I can demonstrate transformer theory to my students. I don't suppose you would be interested in sharing the specs on that at all? Our cable sizes are metric here and our single-phase voltage is 230V, so I would have to make certain adjustments. Would be great to talk to you if possible. All the best.
I'm coil crazy, yes coils are very interesting things.Each one has it's own personality, so to speak, the specs. determine the properties exhibited. Built a pulse motor using coils and a magnetic armature that has run a year and maintained the battery voltage. Self Sustaining Pulse Motor, have to make a schematic but don't want to disturb the thing.
Dave could you make a video about the Scott T connection and show how the H1 and H2 taps are connected. I’m sure you’re aware but I’m interested in how it’s a 2 transformers bank with 3 cut outs giving 3 phase
Does winding the coil one way versus the other way determine which side will be "positive"? I.e. the meter was reading positive voltage. If you had left leads on same ends but taken entire coil off and flipped it before putting back on would it have read negative? Course it being AC might throw things a bit. But I think you kind of addressed what I am trying to figure out when you talked about phase. So maybe one direction of secondary is in phase or positive same time(excluding lag) and an opposite wound secondary would be out of phase or negative when primary positive?
still waiting for your future videos. and also try to explain why neutral of transformer is grounded? and what will happen if the neutral of transformer not grounded
Can you tap into a transformer wire while the voltage changes? Like have a multi stage level transformer. Oooo okay i understand taps haha wow right when i was typing this you mentioned it.
Dave, how could one get 120 in each phase to neutral from a 3 phase source from a delta connection??? Without having a high leg... i saw a delta Service 120 each phase to neutral and 240 between phases shouldnt it be higher one phase? What equipment could be between tranformer and panel?
In a 3 phase delta, the line voltage magnitude is equal to the phase voltage magnitude. If you have a 240Vphase delta transformer with a center tapped transformer on one of the legs, you can get 120V with respect to the neutral on that phase. Some complicated math for the other leg that does not have the center tap with respect to neutral, but it would end up being 73% higher. (multiply by sqrt 3).
Hi Ivan, Thanks for asking, but I haven't seen a scenario that you describe, and thank you to "A V" for replying with the math for a high-leg delta. You should see about 208 V from the high-leg to neutral. I suppose someone could take that 208 V (high-leg phase wire and neutral wire) to a single-phase transformer and transform it down to 120 V, but this is probably highly unconventional and could have unintended/negative consequences depending on how the transformer connections are made and if the other phases or the center-tapped neutral from the original delta transformer were accidentally connected to the "neutral" (not really a neutral, but potentially a grounded conductor) from the single-phase transformer. I it were going to a panel this would likely be the case. For starters, you may end up with current finding its way back to the delta through the single-phase transformer by traveling on the ground conductor between the two transformers. I have never seen the high-leg used for single-phase 208, but I have heard that some people say they have. There may be something out there like what you're describing, but I haven't seen or heard of it.
With most transformers that have a magnetic core, including yours, doesn't the core suck up all the magnetic field? That is, like 99% + of the flux lines are in the transformer's core? And if in theory, in order to induce an emf you need a wire, and a magnetic field, and relative motion. When the wire "cuts through" the magnetic field lines it induces an emf. So if 99%+ of the magnetic flux lines are contained in the core of the transformer, which magnetic flux lines are "cutting through" the wire to induce the emf? I realize this is a different type question, but it seems that there is a conflict between the theory here to me. Any thoughts? Thanks
consider it from the corollary of Amperes circutal law. if there is alternating current passing a straight wire then there is alternating magnetic flux around. Now if there is alternating flux through a straight path then there is alternating voltage around it. Same happens in case of eddy currents. just a crude explaination.
@@Aadil41290 But a transformer is specifically made in a way to utilize the characteristics of a coil, an inductor. That is to "focus" the magnetic flux. The flux is already focused in the area inside the coil. So I mean amperes law is all good, but an inductor is not a straight wire conductor. They behave differently, and engineered on purpose to take advantage of the properties of the inductor/coil. Thanks.
Your videos are clear, concise, informative, and non-distracting. Please continue creating these sorts of videos, I really appreciate them.
I have learned so much from your videos. Thanks for sharing the knowledge and making the world a better place.
Gordon I wish I had your videos in the 90's where I was learning in my technical college in Poland. Because of the materials which you produce is so easy to undesrsted electric principles.
In the 90's I had to learn from the books and somtimes it took me so long time to undestand and make sure that I undestend correctly a lot of these principles which you showed. What you made is incredible just only few minutes isteead of months or years is needed to learn the same quantity of materials. Your materials should be provided to many many schools in the world as the basic curruciulum.
Best regards
Piotr
I'm so grateful that you are making this content for us students
I was a little bit confused how a transformer is built. But your videos really helped me understand it. Thank you so much for this video
Great stuff Dave. Always a treat to find new material posted. Love forwarding your material to the up and comers as well as reviewing myself! (And all glory to god indeed!)
I'm just a lowly vintage tube guitar amp tech and want to know every detail of every part I deal with, you have helped me tremendously and now that I understand this great video I can watch the next one confidently.
you are the best instructor i have ever seen you make it so simple and making sense
Clear and concise as always.
We remain a students despite all. Keep going Sir.
Best teacher ever
The most under rated channel your explanation is very concise and informative and easy to understand keep going sir you are amazing ❤
The fact that this has less than 10k views is criminal, but it also helps me feel secure in my job. If the average TH-cam viewer can ignore these fascinating and amazingly well-done videos, perhaps there's hope for us yet. ❤
Keep it up, champ!
sir good evening nice
And explanation way is so straight to understand by practical ❤
Just Amazing explanation.. Keep doing sir
Excellent Dave! Thanks for making this subject much easier to understand. Your explanation was clear and understandable combined with the visual...Perfect!!!
I love your videos. Please keep doing them.
Thank you, best explanation ever, keep on
Making equations alive. Amazing!
I’ve always thought of voltage level induced into the secondary as simultaneous overlapping voltage addition & subtraction (ac) for each winding, equaling out to the total amplitude of the induced sinusoidal waveform. I like the series battery analogy better though because it’s easier to picture & understand, even with the DC distinction. Clicked with my brain anyhow, so thanks!
Hey Dave I know you have done a ton of videos, your a good instructor nd have a organized way of explaining things, I was wondering if maybe you could give us se lectures on some grounding ?
Dave. Great video. Can you make a video explaining separately derived system on generators. When the bobding on the grounding wire needs to be disconnected fron the generator neutral. Thanks for taking the time to provide this great information.
Fantastic as always!!
very nice explanation
Hello Dave.
Just wanted to say how great I think your channel is. I'm a college lecturer in electrical installation here in the UK and I would love to build something like that so I can demonstrate transformer theory to my students. I don't suppose you would be interested in sharing the specs on that at all? Our cable sizes are metric here and our single-phase voltage is 230V, so I would have to make certain adjustments. Would be great to talk to you if possible.
All the best.
Thanks Dave. You are Brilliant :)
I'm coil crazy, yes coils are very interesting things.Each one has it's own personality, so to speak, the specs. determine the properties exhibited. Built a pulse motor using coils and a magnetic armature that has run a year and maintained the battery voltage. Self Sustaining Pulse Motor, have to make a schematic but don't want to disturb the thing.
Nice job done Master
Great videos Mr. Gordon, in your next transformers video could you explain why they make this humming sound?
Thanks
Another solid video. Thanks!
Really informative Dev..thanks for it.. I have a question, how can we select coil thickness?
very important for beginners thank you !
Great video thank you
Great job!!!
Dave could you make a video about the Scott T connection and show how the H1 and H2 taps are connected. I’m sure you’re aware but I’m interested in how it’s a 2 transformers bank with 3 cut outs giving 3 phase
Hi Dave! Love your videos!! What is the textbook that you use in your classes? Thanks!!
This video is so damn good
Does winding the coil one way versus the other way determine which side will be "positive"? I.e. the meter was reading positive voltage. If you had left leads on same ends but taken entire coil off and flipped it before putting back on would it have read negative? Course it being AC might throw things a bit.
But I think you kind of addressed what I am trying to figure out when you talked about phase. So maybe one direction of secondary is in phase or positive same time(excluding lag) and an opposite wound secondary would be out of phase or negative when primary positive?
❤ love it !
amazing!
Excellent
Sir thanks please make a vedeo on wye/ Delta transformer and their calculations
still waiting for your future videos. and also try to explain why neutral of transformer is grounded? and what will happen if the neutral of transformer not grounded
Super cool 🤘🏻
Thank you 🙏
Do u teach any access control for commercial buildings TH-cam videos
Hello, I was wondering what book would you guys recommend for beginners who want to learn electrical theory
🙏🙏🙏👏👏👏
Could you do a video on ohm reading of OL on motor control starter n/o, n/c
Can i make a toroidal transformer with a generator stator and use stranded ac wire for primary and secondary winding?
Pleases explain the dott Convention with practical
is that multimeter made by apple? :D
nice thingamajig, so basically those "arms" close the core path, it's a swiss army transformer
What is the line to ground voltage of ungrounded system?
Can you tap into a transformer wire while the voltage changes? Like have a multi stage level transformer. Oooo okay i understand taps haha wow right when i was typing this you mentioned it.
What cause the humming? What is actually humming?
Dave, how could one get 120 in each phase to neutral from a 3 phase source from a delta connection??? Without having a high leg... i saw a delta Service 120 each phase to neutral and 240 between phases shouldnt it be higher one phase? What equipment could be between tranformer and panel?
In a 3 phase delta, the line voltage magnitude is equal to the phase voltage magnitude. If you have a 240Vphase delta transformer with a center tapped transformer on one of the legs, you can get 120V with respect to the neutral on that phase.
Some complicated math for the other leg that does not have the center tap with respect to neutral, but it would end up being 73% higher. (multiply by sqrt 3).
Hi Ivan, Thanks for asking, but I haven't seen a scenario that you describe, and thank you to "A V" for replying with the math for a high-leg delta.
You should see about 208 V from the high-leg to neutral. I suppose someone could take that 208 V (high-leg phase wire and neutral wire) to a single-phase transformer and transform it down to 120 V, but this is probably highly unconventional and could have unintended/negative consequences depending on how the transformer connections are made and if the other phases or the center-tapped neutral from the original delta transformer were accidentally connected to the "neutral" (not really a neutral, but potentially a grounded conductor) from the single-phase transformer. I it were going to a panel this would likely be the case. For starters, you may end up with current finding its way back to the delta through the single-phase transformer by traveling on the ground conductor between the two transformers. I have never seen the high-leg used for single-phase 208, but I have heard that some people say they have. There may be something out there like what you're describing, but I haven't seen or heard of it.
How is he able to touch the transformer without being electrocuted??
It’s insulated
Sir, what would have been the current in the secondary if you shorted it at the 4.67V you had😭😭😭
And what would have happened to the primary’s current? Stayed the same? Increase? Or decrease?
@@kyle5555 I plan to look at the relationship of current between primary and secondary windings in the 5th video in this series. Hopefully soon...
With most transformers that have a magnetic core, including yours, doesn't the core suck up all the magnetic field? That is, like 99% + of the flux lines are in the transformer's core? And if in theory, in order to induce an emf you need a wire, and a magnetic field, and relative motion. When the wire "cuts through" the magnetic field lines it induces an emf. So if 99%+ of the magnetic flux lines are contained in the core of the transformer, which magnetic flux lines are "cutting through" the wire to induce the emf?
I realize this is a different type question, but it seems that there is a conflict between the theory here to me. Any thoughts? Thanks
consider it from the corollary of Amperes circutal law. if there is alternating current passing a straight wire then there is alternating magnetic flux around. Now if there is alternating flux through a straight path then there is alternating voltage around it. Same happens in case of eddy currents. just a crude explaination.
@@Aadil41290
But a transformer is specifically made in a way to utilize the characteristics of a coil, an inductor. That is to "focus" the magnetic flux. The flux is already focused in the area inside the coil. So I mean amperes law is all good, but an inductor is not a straight wire conductor. They behave differently, and engineered on purpose to take advantage of the properties of the inductor/coil. Thanks.
They don't have a magnetic core.
They have a core made from a ferromagnetic material.
The core isn't magnetised, but it can conduct a magnetic field.
99% isn't "all".
@@deang5622
Ok, you're right the core is typically a ferromagnetic material.
And are you suggesting that the
This is very helpful.
Soli Deo Gloria
Gujarati translation helping
Go on, you have shown them one equation, now show them the differential equation which includes mutual and self inductance.
long time no see, sir. I miss you so much
I really appreciate for this type of knowlege🫡🫡🫡
You are amazing
If I can find someone who can explain how the motor rewinding is done like you are explaining on transformer I can be very grad