Sir, I am Electrical Engineering student. I study a lot of Theory, Physics, & Maths and answer a lot of Exam questions. But these AMAZING Videos show me the REAL LIFE Practical Applications of those theories. Thank you very much sir. Love from Malaysia ❤
Hi Jeremy I am 57, female and knew nothing at all about electric motors until very recently. However after watching two of your videos I'm thinking "this stuff is so simple! How could I not have understood this before!" lol. Thank you! We should all be taught this stuff at school, along with a lot of other practical stuff, but of course we are not! Love your relaxed delivery as well, you are great to listen to. Cheers mate from over here in New Zealand :-)
I'm a high school physics teacher and I use these two videos each year in a flipped classroom to teach students how motors and generators work. So simple and so important for kids to understand.
I've spent a couple of hours watching your videos and they are pure genius; you have a real talent. I've learnt more in this couple of hours than endless videos of wiring diagrams , technical explanations and so on. These really ought to be a must for kids schools. Well done mate.
Just started self-study electricity and, after watching 100+ well-intended videos explaining the core principles, I got to your videos ... and I am thrilled. Finally !!!!! Thanks so much, you are an awesome teacher.
I really like the practicals examples you use in your videos. Seeing the insides of the motors helps me grasp the concepts of electric motors. Thx Jeremy
I'm catching up on your Videos slowly but surely ! I'm so Glad I found someone that can explain electromagnetic fields in a physical comprehension way ! Bravo Sir !
Sometime when you are needing subject matter for videos, could you get into more details regarding how larger generators work like car alternators and portable generators? I think some of those huge wind driven generators are interesting.
Now this is good. Text book concepts demonstrated physically, high school learners would understand much better whatever they are being theoretically taught if it was continuously integrated with such demonstrations. As an Engineering student I appreciate and will fully utilise this.
I maby understand 10% of what your talking about. But the sound of your voice and those moving hands make me think I understand 100%. Thank u so much. And thanks of course to your family for given you time off for doing those vids. (Excuse my english )
Don't understand me wrong. I'm aware of lacking in basics. So on your side this way of schooling is awesome. The voice has the right sound. The speed is very much to my satisfaction. The cuts are optimal. And the hands are very well used. Its very helpfull when you make those quick tips with your hands to marque the object. This is so much better then ordinary schematics. And on my side I will just have to step backwards on the level. I definitely also check your patreon side. So thanks again n for the heart, awesome. Edit: So now I just came back from your side and I'm now also a patreon. :-).
What a talent you possess. Your teaching skills are 'top shelve'. I was able to understand the motor operation finally. I hope you provide other topics that you are also well versed in. Thank you for helping me learn something new.
On the topic of using a universal motor as a generator by applying a starting voltage and then letting it power its own electromegnets- uh, thats how most large power stations work these days. its just a lot more cost effective then making massive permanent magnets. (its called like self motivation or something) thats probably the only bit on motors and generators i understood, some practical generator stuff, you're teaching me a *lot*, thank you. This is very helpful
From one instructor to another. I am sure you know that you are a good instructor. This particular subject is rife with seeming intangibles but you a very good job of tying it all together.
Very interesting stuff. Can't wait for more videos!! Thank you so much. Your presentations are super clear and easy to understand. I could watch this stuff for hours!!
Iv been passively learning how to manipulate electric motors for years now, as they appear in most all the tools I own. This channel has been an incredible resource, thanks.
Love your videos! I commented on one a few months ago where you were showing the uses of washing machine motors and dishwasher motors and such, so you may remember me, but I wouldn't be surprised if you don't. I have worked in industrial machine design and maintenance for about 30-something years and have a fair bit of experience in all sorts of motors -especially DC motors, which I cut my teeth on as a wee lad. One way I do a quick and dirty check on the commutator of a PMDC motor is to disconnect it from the load and the power and let the positive and negative leads hang free. I then spin the shaft and have someone short the leads from the motor. Even a relatively free spinning motor shaft on a PMDC motor will practically "lock up" the instance the leads are shorted if the commutator and brushes are in relatively good and clean condition. It is a terribly interesting thing to do, and may be worth you doing a demonstration of it in a video. I don't want to sound like I'm trolling on this next part, and I'm not technically "correcting" you because you didn't say anything that needed correcting, but there was a slight implication that you could run 130VDC through an inverter and get enough power to run ~120 VAC products. Actually, inverted 130VDC will give you up to about 90 volts AC unless you run it through a boost transformer first.. This is because the apparent voltage of the AC waveform is determined by the root-mean-square (RMS) of the peak AC voltage (PV). The RMS is defined as 0.707PV. So, in order to get 120 VAC, you need about 170PV. While you can rectify 120VAC down to a fairly decent 120 VDC, you cannot directly invert 120VDC up to 120VAC unless you use secondary boosting transformers to take the AC up to at least 170 or so.
I was trying to point out the relationship between speed and power output... in DC. Most home made generators use a 12 VDC to AC inverter with transformer to step up the voltage. That is why I added the note on the screen about not needing that much voltage to invert the power you need. Also it would be very impractical to spin the shaft at 4800 RPM unless your power source is another motor.
You ca use an universal motor as a generator without external dc. You can use the power is generating to supply the field windings. You just wire the stator in series with the rotor and the load. An to start it will use the magnetic remaining field in the armature.. Or in other words you can just hook up a drill or an angle grinder to a 100w light bulb and use a drill set in reverse to spin the shaft in the opposite (clockwise) direction.
These are great videos, Jeremy. Thank you so much for putting so much work into them. I've had several 'a-ha' moments while watching, and that's just magic for me. Your a great & natural instructor, brother!!
A lot of generators use non-permanent stator winding. A small amount of residual magnetism in the rotor generates the initial field current for the stator and then as the field current increases, more power is produced. The field current is then limited by an Automatic Voltage Regulator to maintain the correct generated voltage regardless of load.
Arrived at your videos because of a question about motor operation was bugging me. Stayed for the whole video series. How much do I owe you professor Fielding? I can't take out any more loans 😜😂 Sad but true. But thanks to being in the electro-mecahnical trades, I'll always have work. Praise God and thank you sir for breaking it down simple and fun! Btw starting teaching my kids as I work on home projects. My girls are growing in STEM confidents 😁
Awesome! its worth noting that Car Alternators use the concept of a small electrical current supplied to the outer windings to create electromagnets that are subsequently used to generate electricity for the vehicle. Loving this series!
Absolutely... Also industrial generators use current to the stator. That is the most efficient way to get a very large magnetic field compared to what you can get with permanent magnets of the same size. The fact that you can turn them on and off is another benefit. I should talk about this in the Q and A. In the video I was thinking about homemade generators, but outside that context it is done that way for many reasons.
Cool.. I am looking forward to the Q&A, I toured a hydroelectric museum (a once working hydro plant turned into a museum) last year and they had separate small DC generators on small turbines specifically to generate the current to create the electromagnets for the main A/C generators. Learning heaps.. thanks!
This was helpfull, I am studying aviation engineering and this stuff is most complicated there, your videos helped me to “decode” words and schemes of our professors, thank you
I'm learning a lot. The subject matter is something I've been avoiding pretty much my adult life however I have a reason to study the subject now. I'm considering repowering my sailboat from diesel to electric. One problem with my situation is finding an education source that I understand and can comprehend. For me you do an excellent job of that. Thank you. Note I know Episode 2 is 4 years old but non-the-less very important to me to grasp the concepts.
I just put a treadmill motor on metal lathe,,,best thing I could have done,,,so much power and very quiet and smooth and the soft start is so much easier on the lathe itself. Love the speed control,,,
Now I have hope to build my own motor and if possible, i will also use it to generate electricity into my home soon. Thank you so much Jeremy for this videos.
The information and the way is explained is very stimulating. The simple process of making things out of discarded items is brilliant. I'm glad to see someone ingenious and practical like you. My saying is never measure a man by how tall he is. Rather measure from the shoulders up. ( good job my friend)
What I was wanting... You are giving the same. I am lehmann in this but I think you are helping me for short cut learning or I should call smart learning..
You are the best in explaining Jerie. Off the topic: Can you please make an Arduino video series for absolute beginners 🙏🏾🙏🏾🙏🏾. I saw your robotic arm and I thought you could be the best in teaching the rest of us. Thank you.
Thanks sir another knowledge....very clear explanation compared to other....easily to understand I will watch the other videos of yours thank you so much to helping us to understand well....you're a great teacher......
Im like you in many ways..even as a child, i loved taking things apart, and wonder what makes them tick..a bit trickier putting them back together though lol..
I am very much interested in the wind power generator and this is been a great help in terms of basically needing a permanent magnet motor thanks great instruction
Can you compare the power input given to the drill and the output power you got by driving the motor and give a value for the efficiency of power production when we use a DC motor to produce current?
Thank you for making these. I'm attempting to make an EV motorcycle, (4 months ago I didn't know the difference between a watt or volt) and you have definitely cleared many things up.
Jeremy Fielding I'm trying to find a good motor to use for a little electric motorcycle. Being my first attempts I ain't looking to put something too powerful. I have a car starter I was thinking about using. Do you think it's a good idea or should I look somewhere else
After watching several of your video's I detect a hint of wanting to share practical and usable information so that people are more likely to understand the underpinnings of how and why over-unity is a reality but also by complicated concepts are facilitated in order to confuse and dilute the understanding masses - ergo understanding masses = masses that are not servants to the metered institutions that have sought, successfully, to enslave and indoctrinate in order to perpetuate a slave cast system. Bravo sir, bravo.
I've always wondered how to get high voltage from generators with low rpm input. Thanks to watching your videos I now know that is from how strong the magnetic field is. Thank you!
A generator and an alternator both use electromagnet's normally. Tare apart a gas generator, or a car alternator. They both use electro magnets to induce current. You'll always notice they have more turns of wire in their electromagnetic windings than on their stators... most generators are not built with more windings on their stators? (Collecting) all dependent on time and the speed at which the fields are induced on magnetic fields... By the way great videos, love watching them.
I totally need to go back when I have some time and watch the first one. This is something I am very interested in but have limited knowledge. Thanks for posting the information Jeremy.
Around 9:00 you say you need external electricity to use these motors as a generator. In large sizes, however, remanent magnetism can be enough to start a small current which then can be fed back to the stator and used this way to self-amplify the generated electricity. In fact this is how old tramcars did dynamic braking using their traction motors.
Thanks for all these very informative videos, I really enjoyed watching them I believe that universal motors can be effective for electricity generation. Even in power plants, the generators used there are synchronous generators, which have a DC excitation in the rotors. These DC sources can be obtained by the generator itself. While some energy will be lost in the resistance of the field winding, it can be greatly minimized if a low resistance is used for it.
