Introduction to 3 Phase AC Systems (Full Lecture)
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- Опубліковано 6 вер 2018
- In this lesson we'll examine 3 phase AC systems on an introductory level. We'll discuss the advantages of 3 phase AC, examine the generation process, look at both Y and delta configurations, and learn to calculate line to neutral and line to line voltage for different types of 3 phase AC systems. (Full Lecture)
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Use it. Don't steal it. Be cool.
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For more FREE online technical training check out the following playlists available at the bigbadtech channel:
DC Circuit Analysis • DC Circuit Analysis
Single Phase AC Circuit Analysis • Single Phase AC Circui...
3 Phase AC Circuit Analysis • 3 Phase AC Circuit Ana...
Hydraulics • Hydraulics and Electri...
Motor Control • Motor Control
Motors and Generators • Motors and Generators
Motor Drives/Variable Frequency Drives (VFD) • Motor Drives
Programmable Logic Controllers (PLCs) • Programmable Logic Con...
Please continue making these lectures... it is the best i have seen so far in that field!!
You outweigh & topoff all my previous n " futur " professors ...All !! Keep Shining..sir
Great lecture! Provides good revision of undergrad EE curriculum.
Bravo to you king! My mind is blown by the explaination..
These videos are an amazing help. I am a Navy ET transitioning into the civilian job market and your videos help us brush up on the basics needed for job interviews as well as to learn more applicable knowledge for the civilian industrial work force. Keep these videos coming!!
3 years ago I transferred as an em. These videos saved me lol
Finally understood the concept, thank you 💯
Very great lecture sir! This has been very insightful for me the way you teach this subject. Thank you so much.
You are the best!
Thank you.
So my so called" smart ass " apprentices (all 10 of them) like to show off as to how smart they are, until I play a couple of your videos at break or lunch. It's fun to watch them turn their video games, stop bragging about how drunk they were the night before, and pay 100% attention to your lectures. Good Job !!!
I even get a refresher, and a headache, but the look on their faces is priceless 😳😳😳😳😳😳😳😳😳😳 😂🤣
Very helpful, thank you.
awesome video sir! Thabk you!
You're great!
Huge help
Excelente explicación. Gran trabajo
Gracias!
I appreciate you for making and uploading, going for my third year electrical. 🙏❤
Very nice, please tell your classmates (and instructor!) about these free resources!
Pytels street cred just levelled up quoting Atmosphere. You a stand up guy for these vids.
Your surfing analogy for the potential difference between phases is really helpful. This makes it much easier to understand what this difference actually means.
You deserve more subs brotha
Tell your amigos!
thank you great leactre
Great explanation
great video, lost me at the math bit, but your explanation of the principles were solid.👍
Thank you so much sir..
Thank you Jim for all the videos again and again. I have a question do you plan to make RC, RL Circuits or first/second differential circuits analysis?
Definite "no" on the differentials. I teach for a program that uses algebraic (ie: non-calculus) methods. I've done both methods before and I honestly prefer the algebraic methods although they do have their limits. I do have some RC and RL transient DC response lectures towards the end of the " DC Circuit Analysis" playlist: ua-cam.com/play/PLdnqjKaksr8qQ9w3XY5zFXQ2H-zXQFMlI.html and I do have RC filter circuits towards the end of the "Single Phase AC Circuit Analysis" playlist: ua-cam.com/video/flRocvQxQw4/v-deo.html
Amazing
Hi Jim, I like your video
I am trying to convert my drone's motor bought from DJI from delta configuration to y configuration to make it spin a quieter propeller at a slower speed and found your video very good for the basic concepts. But the drone motor has 14 magnets in 7 repelling pairs, and the 12 windings make counter polar forces in 6 pairs. I am failing my attempt. I used to rewind the entire motor myself that worked well. So, I maybe that is what I will do next.
at 28:50 how are you getting the line to line voltage/angle. I'm not seeing how substituting the given values for L1 and L2 get you to 380v @degrees. I understand because of the explanation before this, however im not seeing the shortcut to getting the line to line voltage. Thank you for an explanation you can give!
Line to line is the difference between the two line voltages. L1 minus
L2. Here's are the lectures that explains the math:
ua-cam.com/video/deZ8FCZ3iqY/v-deo.html
dank u wel voor een goed velkraringen)
graag gedaan!
Thanks!
What?! Thanks for the very generous donation! More material coming your way! Releasing a bunch of new pneumatic material and working on some new motors and generators content.
Your LL KoolTeq analogy reminds me of an ex girlfriend. She had me close but then moved on to something else and I lost it completely.. then after feeling like a 1 leg cat tryna bury a turd on a frozen pond, at 40:45 I found myself back in familiar territory. Where many people may be ok without understanding how this all works, as long as it does work, I am not one of those people
Stick with it man. Like ex-girlfriends there is some admittedly rough times you gotta go through (ie: the complex math playlist ua-cam.com/play/PLdnqjKaksr8o08K4VY02fVXQijxT1yDTI.html) but it's all easy* after that.
* not really. It's still hard but it's worth it.
Work is being done on both sides of the axis? The further each wave is from zero, the more capacity it has for doing work?
True dat. + voltage times + current yields + power as does - voltage and - current yields + power. Instantaneous power does depend not only upon the magnitude of voltage and current (ie: distance from axis) but also the phase shift between them. Check out the AC Power lecture at: ua-cam.com/video/nse2vSlOoME/v-deo.html
Deserve to go viral
Spread it! Tell your friends.
@@bigbadtech One post to the Facebook 💥
No, please don't make me go there! Can you do it for me? I'm scared.
@@bigbadtech I'll do it leave it to me 👍
43:00 Im a little confused here - you were talking about sources and then you are talking about windings. Can sb sum up sth for me?
Delta for sources : line to line voltage = phase voltage
Delta for windings : line to line voltage = phase*sqrt(3) voltage ??
There's a lot of confusing terms associated with 3 phase AC. That's why I commonly restrict myself to the terms "line to neutral" and "line to line". Here the three windings on a 3 phase AC generator could be viewed as 3 independent sources with a relative phase shift of 120 between each other. How those sources/windings are hooked up presents us with two different scenarios: a delta configuration or a Y configuration. A delta configuration results in a line to line differential equal to the differential across each source. A y configuration results in a line to neutral differential equal to the differential across each source and a line to line differential equal to sqrt(3)*differential across each source.
hi jim, i recently saw a video of yours and you said you worked in the semiconductor industry before. i know its just one google click away but mind if you tell us what kind of jobs can we look for with a BS in EE?
EE careers are numerous: manufacturing, design, energy, information, transportation. Very good field because if something starts to bore you there's plenty of other options.
Is there difference between Wye-Wye Delta-Delta Wye-Delta and Delta-Wye? What's the similarities between them? I'm still confuse
3 phase AC circuit analysis isn't something that's immediately understandable. It takes time and practice. Luckily, I've got a whole playlist detailing these differences: ua-cam.com/play/PLdnqjKaksr8qzoIGCYx2rhVK51ZPjXkRO.html
Listen to Jim and you will be fine , if you had a problem then you not tracking 😁
I request you to make a course on Electric power system.
Stay in touch. More material coming your way soon.
which book you use?
No book. The electronics series is taught entirely using these online lectures. Stay in touch because I'm consolidating all the study notes this year and releasing them as an online book this summer.
I saw another video (ua-cam.com/video/4oRT7PoXSS0/v-deo.html) that suggests the strongest magnetic field, and therefore the strongest current, is seen when the magnet is perpendicular with the coil as opposed to parallel as shown in your video. Which representation is correct? Based on my understanding of magnetic fields, I would think the other video is more accurate, but I don't know enough to definitively prove that. Could you provide some insight, please?
The orientation of the windings axis, either radially or axially aligned with the rotor, and the direction of the winding wrap also dictate how the winding interacts with the rotor magnetic field so, depending upon construction, you could peak at different rotor angles and polarities. Because my graphics often have the production quality of a 1980s Bananarama video I have to throw in the legal disclaimer "... assume the windings are wound in such a manner ..." Regardless of winding orientation, the 3 phase AC output will still be phase shifted 120 from each other because of the 120 physical offset of the windings.
@@bigbadtech Gotcha. Thanks for the response
YESSS .... ENGLISH
Given this is based on time taken for current to travel, why don’t we take concern for the length of our conductors in the industry? Seems like our conductor lengths would need to be exactly the same in order to benefit from 3 phase.. any thoughts would be appreciated, and please keep in mind I’m kinda new to quantum physics, and also aware of the fact it’s not a new concept. I’m just really stupid and need help from you smart people. Thanks for your patience.
You'd definitely be dealing with the quantum realm if you're talking about speed of electricity. For the intents and purposes of this lecture series one can assume it's quasi-instantaneous. Often times applications necessitate matching lengths of wires not because of the time issue but rather matching the impedance (ie: resistance) for each leg.
This doesn’t help me put it into my circuits tho.
Precisely,Line to Line is 381/_30,why do all use 380 instead:)?
Or ... is LL exactly 380 and LN to precisely 219.393....? The world may never know.
@@bigbadtech Definitely maybe 🤔
I tried to follow this but my attention span fell at an angle of 120 degrees
Why counter clock wise? Because it's american thing to do everything opposite than anyone else.
That's actually a Prussian artifact courtesy of Charles Proteus Steinmetz.