EEVblog 1470 - AC Basics Tutorial Part 3 - Complex Numbers are EASY!

Complex numbers are NOT complex!
How complex numbers are used in AC circuit analysis.

00:00 - Complex Numbers
00:44 - Phasor graphical addition
01:22 - Why do calculators have the R-P and P-R buttons?
02:44 - Phasor diagram
03:59 - The AC voltage equation
04:47 - The complex plane and j vs i imaginary axis
06:21 - The Rectangular and Polar forms
07:36 - The j operator
10:38 - Polar and Rectangular format conversion
11:50 - Plotting points on the complex plane

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#ElectronicsCreators #tutorial

[cinobro]

Would genuinely love a full fundamentals course. Imagine if Dave had a full EE course!

[techman]

Thank you, Dave, for these insightful instruction videos. I have been out of the AC power field for many years. It is good to have a refresher about complex numbers. I have been doing digital electronics and computers fro 20 plus years. In the US Navy, I worked on AC generators and motors, not really knowing this aspect expect for private study. Thanks again!

[cinobro]

Thanks Dave!!! I can’t tell you how valuable this is for all electrical students!!!

[JYelton]

I love the fundamentals and tutorials content the most! Teardowns, debunks, and mailbag are fine, too, but this is the stuff that I revisit, benefit from, and recommend to my colleagues.

[mikegreen]

Another great tutorial, vital for both the new players and some old hands for a basics brush up over a coffee. Don't be disheartened by a few bad comments, your channel has something for everyone, after fifty years in the industry I still sometimes pick up a useful nugget from your content. Remember, you cannot please all the people all the time but I for one have watched your channel(s) for years, thanks.

[polaraligned]

30 years since I learned this in college. Never had a use for it in the real world, but neat to have learned it.

[classyjohn]

Thank you for covering this material! I'm learning electronics on my own as a hobbyist and so far, the complex numbers and transformations have been the toughest part!

[jvburnes]

This is awesome. 2 semesters of EE in 3 videos.

[jimhark]

Thanks Dave, I love this content. Your clear and simple explanation really helped me bridge the gap between vector math (which I'm comfortable with) and complex numbers. Looking forward to more videos in this series.

[SomeMorganSomewhere]

Loving this content, short punchy and gives you the info you need, as opposed to my university course (graduated some many years ago now) which padded this topic out to multiple semesters...

[bijayabaidya]

Brings back memories from 45 years ago! Well presented!

[ValeraManasyan]

I absolutely love this explanation! Small mistake there though at 12:37 - it should be = -5 + j4

[davidtodd]

We use j to avoid confusion with the symbol for current i

[MrDoneboy]

I, for one, am a HUGE fan of these instructional videos, Dave. Thanks so much...you are appreciated!

[NamelesGhost]

Currently studying electrical engineering and this series is exactly what we learn in the basic courses!

[SaturnV]

Another way to express "CIVIL" as I was taught in college: "ELI" the "ICE" man . . . E leads I in L inductive reactance, and I leads E in C capacitive reactance.

Since then, "V" has pretty much replaced "E" in electronics nomenclature . . . but still useful!

[nutsnproud]

Dave, thanks for taking the time t teach me something I struggled to understand for many years.

[johnp]

Dave, Did this a long time ago at Tech and Uni but never had it explained as clearly as you have just achieved. Thank you.

[SaturnV]

Dave's enthusiasm is contagious!😀Keep up the good work!

[davidgari]

So there is an application for imaginary numbers after all.
Thanks for taking us back to school. Well done.