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Пікірлер
@u1zha 15 сағат бұрын
15:32 Here you finally reveal that the needle is allowed to move very slowly when you close the contactor... Whereas throughout the lecture you're implying all the time that there's only one right moment, and that's when the match is perfect. So... You're actually quite confusing and failing to explain the crux of the synchronization process. I.e. _why_ a small speed difference is practicable and how.
@sergioalbertoroman2316 16 сағат бұрын
Thank to sharing very use full
@pabloetchepare7160 2 күн бұрын
Love to have you as My Best Personal TEACHER !!!!!!!! . You are THE GREATEST !!!!!!!. THANKS !!!!!!!
@johnstillman2935 2 күн бұрын
not only would I waste time reading circuit analysis but by and large I have learned that listening to other KZfaq channels is mostly a waste. Thanks Jim!!!!
@candicemartinez3649 2 күн бұрын
Thank you for this
@pabloetchepare7160 4 күн бұрын
oops. don't understand anything.......... :(
@pabloetchepare7160 5 күн бұрын
And you just made my day again !!!!!!. With your jokes ( woody wood pecker, and the medical coverage , you have got me ! ) and everithing, you catch the attention of everyone in your lectures. You are awesome !. Love to have you here and look to meet you some day !. Thanks. Pablo.
@pabloetchepare7160 5 күн бұрын
Hello Jim. Can't wait to thank you all the knowledge you share here. I can't just thank you enough for teaching me and us all what you know and have learned all over the years. You explain to me things that I just wondered around for 25 plus years and you made everything so clear. You are Awesome. Thanks. Pablo.
@pabloetchepare7160 6 күн бұрын
DONT GET IT WHEN IN THE ROTOR YOU DRAW TWO SOUTH AND TWO NORTHS...... :(
@bigbadtech 5 күн бұрын
Weird right? Yes, 2 pole pair motors have 2 magnets on the rotors. 3 pole pair motors have 3. Etc. etc. Although motors with more pole pairs go slower they're stronger (ie: more torque) than a similarly rated motor with less pole pairs. More magnets means more stopping points along the way but more strength.
@johnstillman2935 6 күн бұрын
how'd he know i had a piece of shit car ?
@pabloetchepare7160 6 күн бұрын
I JUST LOVE YOUR LECTURES !!!!!!!!! YOU ARE A W E S O M E !!!!!!!!!!!!!!!!!!
@pabloetchepare7160 6 күн бұрын
HELLO jIM. HERE WE ARE AGAIN. YOU ARE MY BEST TEACHER OF ALL !!!!!!. YOU MAKE MAGIC TURN TO UNDERSTANDING AND KNOWLEDGE. YOUR LESSONS ARE SO CLEAR, THAT I'M HAPPY TO BE AROUND AGAIN. THANKS AND TAKE CARE. REGARDS . PABLO.
@chuckcrizer 10 күн бұрын
Just found this channel today and I'm hooked. Fantastic data and a great learning opportunity.
@chuckcrizer 10 күн бұрын
This channel is off the freaking hook!
@benjaminibeji4132 11 күн бұрын
Thank you so much for putting this together
@matthewmubvaruri3248 11 күн бұрын
This is gold, thanks @bigbadtech.
@bernardogomes4058 12 күн бұрын
I have a doubt when we subtract A - B , should we take into consideration the values of the operation and draw the resultant vector from the origin? Because i am not understand why we start from B and then go to A.
@bigbadtech 12 күн бұрын
Common question. Here's an analogy. Think about the simple number line you used when your teacher first introduced subtraction when you were around 5-6 years old. Consider the expression 5-2. 5 is A. 2 is B. Draw a line from 2 to 5 (ie: B to A). 5 is 3 greater than 2.
@bernardogomes4058 11 күн бұрын
@@bigbadtech Thanks 👍
@noahrange9985 16 күн бұрын
I definitely have some sort of incorrect assumption somewhere any help is appreciated. I am totally fine with the idea of high side switching being safer given conventional current and all but I am still confused as to why that is because I remember that in reality it is the electron that carries the energy and is flowing out of the negative terminal. The electrons coming out of the negative terminal have a higher energy potential and disipate it through an element. So in reality the (+) end has the low energy electrons and should have a voltage of 0 in relation to the ground no?
@rybread1727 19 күн бұрын
Had this class in 2015 with Professor Pytel. Still come back to the lecture when I need to work with PLC
@bigbadtech 17 күн бұрын
What up? Hey if you’re in town this weekend swing by the campus Saturday for the STEM fair 9-12. You’ll be jealous of all the cool new equipment we have now!
@rybread1727 17 күн бұрын
@bigbadtech Would love to! But I live in Phoenix now. Finished a MS in EE at ASU and I work in Tesla's battery dept (Megapacks Utility scale). All these levels of education and CGCC still boasts the most technically adept teacher I've had.
@nhitc6832 20 күн бұрын
If this is a single phase transformer serving multiple houses, does the center tap get bonded to the grid neutral? (The one that runs along high voltage lines)
@sanjukbabu9958 20 күн бұрын
Love your sessions mate. Its so helpful and the way you have explained it and the flow of the presentations....love your work
@EarthMan-hx3xb 23 күн бұрын
Your content is extremely useful and awesome. Thank you!!!
@GopiKrishna-sm6pe 24 күн бұрын
Very nicely explained. Thank you so much...!
@jaypatel6998 24 күн бұрын
Great Explanation
@Leonarco333 24 күн бұрын
So a make makes sense and a break breaks my brain. Perfect naming convention.
@sudhirsharma3435 25 күн бұрын
This is one of the most beautiful and elaborated video I have seen on this topic. Heads off to your effort.
@Ossorembo74-no3dc 26 күн бұрын
well put introduction to PLC
@FVCLUB16 Ай бұрын
You are great 🙌🏼
@FVCLUB16 Ай бұрын
18:25 ⚡
@JanKowalski-fk7gr Ай бұрын
Hey Man appreciate your work. Could you please help me understand what voltage is provided to rotor when nrotor=1800 and nstator=1800 (time 13:16 ). If i understood corectly when nelectromagnet is 0 rpm, voltage frequancy in rotor is also 0, which means that there is a Dc voltage or there is no voltage at all, second situation obviously does not make sense becouse there wouldnt be magnetic field, first situation is also not clear becouse how would you provide dc through AC/AC converter. I have also second question if i am right the current is provided to the rotor from the grid(but is it only during excitement or also during normal work?), if the rotor is provided with power from the grid whole time how is it possible that the power in wires is going in 2 opposite directions at the same time power going to the rotor and power going from the stator(is it possible becouse of 3 phase ac voltage?) or is it working like that: after generator is excited stator provide power to the grid and to the stator?
@bigbadtech Ай бұрын
first question, 0 Hz = DC, the middle part of AC to AC converter is DC so it's just AC to DC second question, yes it's 3 phase AC sometimes it goes in some times it goes out
@bautistabohm1168 Ай бұрын
Great explanation it was really helpful
@YakutY Ай бұрын
THANK YOU
@danieldejesus2721 Ай бұрын
Good morning what happens if is appears DATA VALUE OVER RANGE
@EsjayL Ай бұрын
Hey Jim, for the final problem, if I am trying to calculate S2 using I^2 * Z, do I keep the absolute phase shift for current since we are dealing with impedance in the equation and not voltage?
@NICKODIMATERA Ай бұрын
Sload= 61.57 angle -114° at 7:49
@bigbadtech Ай бұрын
Remember AC power is always calculated using "relative" phase shift. kzfaq.info/get/bejne/pNmVZdmE0bXTfXk.htmlsi=70pdqlKKBlYBHfN0&t=2237 In this example current leads voltage by 52 degrees thus apparent power has an angle of -52 and can be resolved into + real and - reactive. An incorrect angle of -114 would have - real. Negative real power is an active source like a generator.
@NICKODIMATERA Ай бұрын
@@bigbadtech Okay I get it, so E is the reference that's why both Iload and Vload has a negative angle. thanks
@relope5404 Ай бұрын
god I love this channel you are a legend
@rob8823 Ай бұрын
Is there any great reason for using octal bases on relays? Not as intuitive when visually inspecting circuits.
@bigbadtech Ай бұрын
If it was easy to be an electro-mechanical technician you wouldn't earn the big money. Yes, the pin outs for an octal base are a little odd but once you get used to them it becomes more intuitive. There are control relays that make use of isolated single pole single throw switches (SPST) rather than octal base relays (which use 2 pairs of SPDT transfer contacts) but, probably because of historical inertia the octal bases are more frequently employed.
@gemunuweeratunga9791 Ай бұрын
Great lecture.. Thank you very much
@sirousmohseni4 Ай бұрын
Excellent video
@vascovieira6207 Ай бұрын
put this in your pipe and smoke it hahahaha that deserves a like😂😂
@mayurmhaske545 Ай бұрын
Really Nice Explanation. Thank you..!!
@robertupthegrove1413 Ай бұрын
I was in the Navy Seabees and played that push ball game with some Army gents when I was in Kosovo. It was a blast from what I remember
@bigbadtech Ай бұрын
I still have a knot on my shin from that game.
@ggjuuuuuuuui Ай бұрын
Sir what is the purpose of two generator synchronisation
@bigbadtech Ай бұрын
Here's a 32 minute video on that topic: kzfaq.info/get/bejne/g5Zgi65mks6XZYU.html
@volcommikkel Ай бұрын
Thank you Jim for your videos. I really wish you would have gone into a little more depth on the explanation on real and reactive power supplied to the grid. I know you say you studied it so we dont have to, but im studying it too and find it difficult to understand the relationship between how real power and reactive power and how it is independent from eachother.
@bigbadtech Ай бұрын
Here's the video that describes the difference between real and reactive power: kzfaq.info/get/bejne/pNmVZdmE0bXTfXk.htmlsi=_LDG4_IXly2Kh_ux
@volcommikkel Ай бұрын
@@bigbadtech Hi Jim. Thank you very much! Gonna watch it right away. And again, thanks for all your videos, they are very informative and detailed.
@idadkumara1 Ай бұрын
Excellent Video for sharing good knowledge in PLC basics. For practice scenarios please visit following channel kzfaq.info/love/ZpRsBQ7HEnjr0_JypWhO9Q
@johnstillman1123 Ай бұрын
All the ridiculous books I have and none of them make it so crystal clear. Thanks Jim
@rudesback5013 Ай бұрын
This channel really made PLCs easier to understand and much more intuitive
@Sami00900 Ай бұрын
😵💫 I'm now hypnotized
@koffibanan3099 Ай бұрын
You weren't overstating it in the thumbnail text; this IS the best lecture on the subject!! Very much looking forward to your transmission line lectures, you really tickled me at the end with what's to come :) Thank you very much once again for the work you put in. One more thing which won't make you happy: in Belgium we call it a star (ster) too. Even better, the delta is called a triangle (driehoek) :p