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rolinychupetin
Canada
Registrace 16. 09. 2008
People ask me ... "why do you do this?, why do you spend days upon days, putting together these videos of yours, and then making them available to the whole planet for free?" My response to them goes along the lines of "I started doing this a few years ago, and never looked back. I think it is the right thing to do. To share what little we may know. It goes along the same way as Wikipedia, but within the realm of expertise of each person, and in a conversational tone, with the apparent proximity of the video. It is an open invitation to others to do the same. To share what they know and love with the world."
What is regulation in a transformer?
One of my ELEC 342 students asked me this question on Piazza. I thought it might be good to answer that for the whole class, so here it is.
However, this answer is already in the textbook, the Stephen Chapman textbook.
The formula used RMS volts for Vnl and for Vfl, not phasors.
Of course, the regulation depends on the power factor of the load.
There is one particular value of the power factor for which the regulation is the worst. (largest value).
However, this answer is already in the textbook, the Stephen Chapman textbook.
The formula used RMS volts for Vnl and for Vfl, not phasors.
Of course, the regulation depends on the power factor of the load.
There is one particular value of the power factor for which the regulation is the worst. (largest value).
zhlédnutí: 750
Video
Magnetic circuit equivalent electric circuit
zhlédnutí 1,2KPřed 11 měsíci
This is an approximate solution to a magnetic circuit. It begins with the gross approximation of assuming that the permeability of the iron is constant. It was recorded live during one of my ELEC 342 office hours (earlier tonight). I hope that it is of some use.
Tutorial/Recitation Magnetic Circuit (constant permeability)
zhlédnutí 753Před 11 měsíci
As a gross approximation, we assume a constant value for the magnetic permeability of the core iron.
What is Inductance, short tutorial/recitation.
zhlédnutí 862Před 11 měsíci
This is the first of a short series of tutorials/recitations on Magnetic Circuits. I made them for my students of Electric Machines, but I uploaded them as public videos just in case they can be of some use to other people.
Thevenin with limits on XCAS/HP-Prime
zhlédnutí 780Před 11 měsíci
Just an example we worked on during an office hour. I recorded it "live" and edited it a bit. It's about six minutes long. It's about finding a Thevenin equivalent circuit using the power of a CAS (In this case, XCAS running on the HP Prime).
Tutorial/Recitation on the Ideal Transformer
zhlédnutí 1,6KPřed rokem
This is just a tutorial, a recitation. It is not a lecture.
(6/6) A tutorial/recitation on Power in ACSS.
zhlédnutí 463Před rokem
Solving a circuit with independent and dependent sources to find complex power in two of its elements.
(5 of 6) Tutorial/recitation on Power in ACSS
zhlédnutí 487Před rokem
Videos 5 and 6 of this series were so closely related and short that I decided to join them into a single video. Also. The remaining exercises are redundant, so they are no more. This is the end of this series. Six videos instead of eight, and that is sufficient.
(4 of 6) Tutorial/recitation on Power in ACSS
zhlédnutí 614Před rokem
In this one, a continuation of (3 of 6), we explore the power factor compensation of a trio of power loads specified as follows, two by their active power and one by its reactive power.
(3 of 6) Tutorial/recitation on Power in ACSS
zhlédnutí 448Před rokem
This is the fourth short video of this short series, of this tutorial/recitation on power and phasors.
(2 of 6) Tutorial/recitation on Power in AC SS
zhlédnutí 800Před rokem
This is the second video of these short six video clips, with one numerical example in each one (except for the first one). This exercise was taken from the "end-of-chapter" questions of the very good book of professors Alexander and Sadiku, published by McGraw-Hill.
(1 of 6) Tutorial/recitation on Power in AC SS
zhlédnutí 932Před rokem
I have broken what would have been an almost unbearably long video into five pieces. This is the first part. The foundation.
A Bode Plots Tutorial/Recitation Ver.2.0
zhlédnutí 950Před rokem
After the success of the previous version of this video, and after reading all the requests and questions about it, I expanded it to make it more self-contained. Previously, it was fine for my students who have been following my lectures for a whole term, but on CZcams, many of my followers were asking questions that were not addressed in the video. Special thanks to the wonderful people of Hac...
WATCH the Ver 2.0 instead.
zhlédnutí 1,7KPřed rokem
The silent Bode Plot tutorial was so successful and viewers have been asking me to add voice narration to it that I did it and here it is. I hope that you like it. Watch the Ver. 2.0, which has seven more minutes of background material at czcams.com/video/FnIYmDXBl4c/video.html
A very short Bode Plots tutorial/recitation
zhlédnutí 611Před rokem
This is a summarized version of the popular "Final Tutorial on Bode Plots" published in this channel some years ago. No words are necessary, I think.
Brief Intro to to Electric Filters for Engineers (Part 2/4)
zhlédnutí 778Před rokem
Brief Intro to to Electric Filters for Engineers (Part 2/4)
Brief Intro to Electric Filters for Engineers (Part 4/4)
zhlédnutí 536Před rokem
Brief Intro to Electric Filters for Engineers (Part 4/4)
Brief Intro to Electric Filters for Engineers (Part 3/4)
zhlédnutí 902Před rokem
Brief Intro to Electric Filters for Engineers (Part 3/4)
Brief Intro to Electric Filters for Engineers (Part 1/4)
zhlédnutí 1KPřed rokem
Brief Intro to Electric Filters for Engineers (Part 1/4)
Pasting a program into the HP Prime Emulator
zhlédnutí 2,7KPřed rokem
Pasting a program into the HP Prime Emulator
HP Prime - Plotting APP (Advanced Graphing) Intro.
zhlédnutí 5KPřed rokem
HP Prime - Plotting APP (Advanced Graphing) Intro.
ELEC 202 - First Tutorial (Phasors) 2023.
zhlédnutí 732Před rokem
ELEC 202 - First Tutorial (Phasors) 2023.
Interpolation in semilog paper (TUTORIAL/RECITATION)
zhlédnutí 2,3KPřed 2 lety
Interpolation in semilog paper (TUTORIAL/RECITATION)
Gratidão imensa por esse vídeo tão bem explicado! 👏
"thank you" cannot express enough my feeling after viewing
many thanks sir
Your videos are the best I've seen for the 50g --- thank you I have the 50g and the prime, but I prefer the 50g....
Glad you like them!
Thanks a lot
Most welcome
Kudos.. really appreciate this too
Thank you.
Watch with 1.25x guys
Hi everyone! Thank you so much for the class ! I have a little question: when ypu compute Id, how do you know it wasn´t the other solution of the quadratic equation? My calculations shows that it could also be 7,9mA but couldn´t understand the criteria to do not consider ir. Thank you so much once again!
This deep and sexy voice save my life one more time when I try to make a shortcut of the partfrac function
En que pais estan?
En uno que no existe ya ... sniff!
@@rolinychupetin como?
@@rolinychupetin mi papá trabajó en OTEPI en Querétaro, México.
u are my legendary, doc linaries , i was one of ur student before and u write reference for me, now i was graduate, i miss u so much
realy❤❤❤❤❤
Thank you very much!!!
I wish professors would come and learn from you how to present their lectures to students. You make everything easy to understand. Thank you very much, Sir.
Wow, thank you!
How do I update the firmware?
I use the Connectivity Kit to do that. I go HELP/Update calculator (with your calculator connected). I am just describing what I do, not recommending that you do this. If you do it, it will be at your own risk and responsibility. My lawyer made me write the last paragraph.
THIS IS AWESOME! I finally found someone that sounds like they're speaking english when they interpret these data graphs.
Excelente explicación, gracias.
Excellent tutorial
Glad you think so!
Thank you! I teach at UBCO and this was helpful. I've been teaching for 4 semesters and each time I have to re-learn how to upload the grades 😅
Dear colleague, I'm glad it was helpful! I went though the same cycle myself. Thank you for the feedback.
When I try to solve the equations I get empty brackets why?
Possibly, you need to enable the use of complex numbers in the reported answers in CAS settings. Without it, you are asking it (XCAS) to solve the system but prohibit it to report a complex number, hence .... empty brackets (the way of XCAS to tell you, there are no real number solutions).
Your videos are so well done, it's exciting me to learn about this again! Thanks for your contribution and fun style of presentation! (a fellow Canadian!)
Glad you like them! I had a lot of fun making them. This is not a monetized channel (I don't get a penny to make them), so all I get is fun, and the joy of reading comments like yours. Thanks!
Yes, just yes! This is how educational videos should be made. I love the whole atmosphere of this video so much! The background, the blues intro, the tone of your voice, ... It makes me less afraid of the difficulty and more eager to learn about it! Thanks a lot! This will definitely help me for my exams :)
Wow, thank you!
Thank you professor
You are very welcome
Sir your explanation is great
Sir,is there any book written by you on electronics, electrical, control system...or any pdf soft copy available written by you..
Many years ago, two publishing houses approached me. My response at the time is more valid than ever. I think that the time for printed books is past. My videos are my book. In time, the videos will incorporate AI interaction that will turn them into a real interactive and personalized learning experience. I don't know if that will be in my time on this planet.
Great videos!
This guy talks sense with less BULLSHIT. He compresses AN ENTIRE SEMESTER to 40 minutes
you make me clear that i was not know the topic even i see many videos before thanks.
Thank you for your enthusiastic feedback.
Thank you, very much Roli. I find myself using expand() quite often and being able to assign it to a user key is very helpful.👍
Glad it was helpful! Recently, I've been using "collect" a lot, but to make it work I had to turn off "simply" to NONE in the CAS settings. Maybe I'll a video about that.
Awesome explanation! Love your videos
Thank you!
Boa noite!! Ótimo vídeo!! Parabéns!! Não sei se pode me ajudar. Estou com o emulador, mas quando calculo a integral indefinida de (2x/(X²+4) ela apresenta como resultado LN (X²+4) / 2, mas o correto é apenas LN (X²+4). Já tentei escrever (2x/(X^2+4), mas o único jeito que ela apresenta a resposta correta é quando digito a expressão (2x/(x * x + 4), que seria a mesma coisa. Assim o resultado é LN (x²+4). Será que na calculadora física esse erro também acontece? Valewwww
Obrigado pelas suas palavras gentis. Acabei de inserir a função original no emulador do Windows, f(x)=2x/(x^2+4) e obtive a resposta certa LN(x^2+4). Minhas configurações do CAS são "modo exato", sem COMPLEX, sem 'i'. E o mais importante, atualizei o software recentemente para o de 13 de abril de 2023.
@@rolinychupetin Muito obrigado pela resposta!! Eu acabei de atualizar tb. Agora apresentou o resultado correto. Valewww
Thanks professor!
My pleasure!
@@rolinychupetin I love all the videos you make
Thank you sir
Welcome
I like your videos
I recently updated my HP Prime with the 2024 release of the firmware. It now shows an "S" value in the Triangle Solver. Can anyone tell me what that value measures or how it's computed? Thank you.
I think is the area (surface) of the triangle.
Thank you very much
You are welcome
Dear Professor, Apologies for the late comment, I just found and purchased a HP Prime G2 for my Engineering studies, and am very grateful for your videos. For this one, however, when I tried to solve for w using the exact steps you have mentioned, instead of nice numbers, I got some very strange, long results with _y and _x. Do you know why this may be the case and how it can be changed? (FYI I have tried again with the virtual emulator, and got the same result)
Try using fsolve instead of solve and let me know.
When I press check after writing this simple resistor program, the (physical G2) device returns a "syntax error". I'm stuck there.
The syntax error sends the cursor to the "offending" bit in the code. It could be as simple as a typo in the name of a variable.
how do you get a lower case j on the hp prime calculator. I can only see the capital J in orange. please respond. Thank you.
ALPHA SHIFT
Not a minute later after I sent you this message and right before i went into cardiac distress, I figured it out. Nevertheless, I still want to thank you for reponding and sharing some of your super powers with me. By the way if you're still not sick and tired of all the compliments, I have to say your videos paint a panoramic portrait of the subject at hand in all its glory. You always seem to have much to discuss and your themes are all for enlightement. @@rolinychupetin
😇😇😇👍👍👍🙏🙏🙏 really good, great job.
Wonderful
Superb video, with a high density of information and the granularity to understand the idea behind the method you show. I like your approach to explain in such a "friendly advisor mode"!
Glad you enjoyed it!
So smooth video, I like your approach as a friendly advisor👌
I appreciate that!
The best teacher on CZcams, on any subject; period.
I love your enthusiasm and support.
First of all thank you Sir for sharing your knowledges. Second, someone solved the first problem? If yes here are my answers: S(Source) = 0.704 - j3.874 kVA S(Factory )= 1.346 - j3.7 kVA I considered 125V and 63A as peak values.
Thank you for your kind words. AC voltmeters and AC ammeters read the RMS value of the corresponding parameters. The standard in the electric energy industry is RMS for any voltage or current (unless explicitly specified otherwise). That means that 125 V and 63 V are both RMS values. Please, try again. Observe that the active power delivered by the source cannot be less than the active power absorbed by the load.
Mind blown! Really good explanation!
Glad you liked it!
I like it!!
good wather comes from good source Excellent thank you
You are welcome
Dear Professor, Thank you for your channel. It is valuable. But I think I see a "bug" in the RR program. RETURN should not use the "()" to return value - using it, you return the complex number a real part :). I noticed that by a small mistake. I wanted to round the output to 2 digits, so I wrote RETURN(ROUND(r1*r2/(r1+r2)),2). I was surprised that the evaluation was x+2i. I made a mistake, and I realized output is a complex number. Now I have "RETURN ROUND(r1*r2/(r1+r2),2)", and it works perfectly.
I waited before responding to give time for you to realize the actual source of the wrong operation of your program. Here it goes. The line that you wrote, let me copy it RETURN(ROUND(r1*r2/(r1+r2)),2) has an error indeed, but it is not the optional parentheses after RETURN, it is that you closed the ROUND( bracket too early, it should be after the ",2" so the ROUND function receives the two parameters that it expects. Do try RETURN(ROUND(r1*r2/(r1+r2),2)). I commend your willingness to explore functions in the PRIME, but I strongly advise against using ROUND in what will be an intermediate result in a longer and more complex computation. The loss of those digits may, most likely, add up to a wrong final answer in the solution using RR. I've advised my students against that in class, and I thought it fair to add the same advice here. Thanks for your contribution and enthusiasm. There used to be a course on the propagation of errors in long computations. It was part of a Physics lab in the first year. I hope that it is still taught.
Great video, I have just bought an HP Prime for my nephiew, he wants to study enginnering, so in my opinion this is a very good Xmas gift, I had an HP 48GX when I was studying engineering in the 90s, a great machine, expensive but worth every penny I paid for it, but, as always, you need to start by the basics and learn how to use it to get the full potencial of it, thanks for the video and merry Xmas (2023 :) )
Merry Xmas 2023, and great gift for your nephew. I hope he appreciates it. I'd suggest that he download and install the emulator on their his laptop so he can practice on the big screen and with a full keyboard.