In the waveform where the voltage is going to 85 volts, that particular voltage has nothing to do with the inductor, as such. It is the result of causing the body diode of the MOSFET to avalanche. It stays at the avalance voltage until the energy stored in the inductor been discharged. Avalanching the diode can be destructive if there is sufficient available energy/power (they are generally rated separately, hence the slash). In some circumstances it is perfectly safe to allow it. Note that at all times the drain of the FET is positive with respect to its source.
Yes, interesting point from @d614gakadoug9. Fred, I've looked over your LinkedIn Profile, and I have sent you an invitation to link with me if you wish. If I may offer a small piece of advice. Your "I'm crazy passionate about (Power) electronics" is or will limit your career development going forward, and I must say after reviewing you on LinkedIn, you seem to lack a broader experience base in the field of Electronic Engineering. Switch-Mode PSUs have been around in consumer electronics since before you were born, I was dealing with them during the 1970s, of course, the power requirements in today's Automotive applications are somewhat different (I ran an Electronics design Laboratory for one of the largest blue-chip Car manufacturers in the world). One of the areas I would perhaps suggest you would like to encompass more in your development is Telecommunications, but whatever you do, don't become a "one trick pony" 😉
I found your channel just a few hours ago but I'm sure I'll watch all your videos starting with the first. I love your style and your clear and logical approach. 😊😊❤❤
A wee bit of calculus without mentioning it. Nice. LOL. Seriously, I like the presentation. You would have lost a lot of the audience if you'd gone the full dt/dx and first second derivatives, eh? The fascinating thing is how dynamic inductance / capacitance phenomena are, and how our 'maths' can tame them! Thumbs up!
Superb presentation skills! I have watched a lot of RUclips on the topic, and few are as good as this channel. I wonder if the glamor face close-ups are a bit off-putting to the browsing electronics hobbyist. Keep the camera on the topic and let your butter voice unravel the near-insurmountable mysteries of electricity.
@shawncalderon4950 ah don’t worry you weren’t rude I’ve had much worse haha! Thank you again, I’m hoping to make more videos in a few months when I’m done with uni.
I'm stuck on a problem I need a solution to! Think this video may be close to the solution. I need a Vampire power supply, that can give a regulated 5v dc @1amp, No matter what the AC input voltage is. An operational example: Have an electronic dimmer on a lighting circuit say 100w bulb we need to generate the 5v dc no matter what that Dimmer or Variac is set to (20 to 100 percent) Any help is be appreciated. Love your videos they are very Good, You right get to the point, and you are good at making them understandable for us average folk.
A simple linear regulator like a generic 7805 is the simplest way to get 5VDC@1A, I would use one of those as the final stage of a PSU, but they can only take up to around 35VDC on the input so preceding that you'd want something else. simplest would be a transformer with a rectifier such that the output would always be between 35VDC and maybe 7VDC. this wouldn't be very efficient or compact though. Really you want a switch-mode PSU which you could maybe achieve by rectifying the mains directly then feeding it through a circuit similar to this, but with voltage feedback rather than current. This wouldn't be isolated though so definitely shouldn't be used for anything a human could come into contact with. I'd look into buck converters, or forward converters if you need the isolation.
Good job mate. Yours is one of the many videos and variations in explaining electronic components and in each video I am able to glean knowledge. This video helped me understand the link between a mosfet and inductor.
AMAZINGLY well done!! NEVER seen anyone explain concepts and relations this clearly and using the actual components to demo! If you wouldn't mind, would you ping me to check an explanation on MOSFETs in a circuit I'm preparing? Much appreciated and keep this up! Much needed!
Thank you for proving that the driver I designed will work. I'm using an h bridge to isolate and increasing voltage on the secondary then running a bunch of 50w COBs in series, limiting the current to 1.5A. That 200ma window using a flipflop and comparators, maybe a little signal filtration and there's uninterrupted light, which is ideal.
This single video on inductors has made me immediately wonder if some of my circuit designs are wrong. Working with Arduinos and purely digital circuits mostly for signalling, I suspect in some circumstances, I may need to revisit my designs. Cheers!
I just subscribed after watching your popular video about power supplies. I know enough to be dangerous. I'm commenting about an extremely popular problem that I'm sure would get many views. I (like thousands of others) bought a VFD and read in the manual that I should have "AC reactor" and an "Input EMC filter" before the VFD. (My VFD powers a 3hp motor that is normally 3 phase but the best I can do is single phase 240v). As for the AC reactor ebay has them for around $300 which is what I paid for the vfd. I've been told I can use a used 3 phase one if I use the outer 2 coils. Then I found a guy who made one for less than $20 by cutting an iron pipe and wrapping wire around it. He ended up with around 5% inductance, which is what is recommended. I am not alone with this problem. If you could made video about it I'm sure you would get everyone who bought a vfd to watch it. Should I buy one of those big 3 phase ones, could I make one with an iron torroid, how does one size a filter, how about just a surge protector, where do babies come from, what is the capital of South Dakota? All these questions keep me up at night. Thanks for your great videos
Hmm pipe sounds a bit dodgy I would imagine there would be a lot of losses. I can have a look into it though as I recently got the kit to characterise inductors so can test custom ones. As for babies, absolutely no idea I'm afraid...
Very nice videos, I like your step by step methodology in presenting subjects, subscribed instantly. The inductor is the analog compliment of the capacitor: a capacitor once charged would short-circuit (lose charge) if we touch its leads, an inductor needs its leads connected once charged so that it does not lose charge (and keep the magnetism not collapsing)! In a perfect world where the inductor was made out of a super-conductor, the current would keep on going. In this world we are in, however, we have ohmic losses, so an inductor cannot possibly compete with a capacitor in this area. A capacitor can remain charged with no losses, indefinitely. Therefore, in any power systems where you care about efficiency, you would use a capacitive design, as they do for mobile phones (the voltages are upped or downed with putting capacitors dynamically in series and parallel, and the current is supplied by how many charge transfers you do). In the design here, you are using a diode to keep its leads connected in the off-cycle, and this introduces a huge amount of losses. You see, a photovoltaic cell, an LED and a diode are the EXACT same devices (believe it or not!), with a slight change in bang gaps. The simple p-n silicon diode is like effectively having an infrared LED turning on every time it is forward biased!! The perfect solution here is to have a field effect transistor also on the top side, instead of the diode! You energise it when you de-energise the bottom one, so you could have it on a single wire if you use p and n types for the top and bottom transistors respectively. That way you have extremely low losses (a good transistor nowadays has a resistance at the range of milli-ohms when turned on, it has a negligible voltage drop). Also, for very high frequencies, or for excellent synchronisation of the two transistors, you could count the nano-seconds it takes to energise and de-energise the gate for each one, depending on the voltage you are supplying, and you could apply the correction time offset with a microcontroller. If you are wondering how you could connect both of the mosfets on a single signal, on a single wire, you could have a look at the videos I have uploaded on my channel regarding the CMOS not gate. Best regards :)
@@electrarc240 Yes, they use them there... An inductor like that would be very happy in a closed circuit. It would be the equivalent of the quality we enjoy with capacitors: the charge is not lost, until you need it. For example, in a system like that, once you do the initial charging, you would leave the top transistor closed while opening the bottom one. The energy would just exist as a magnetic field, until you need it.
Very nice I've basically just startet making this my new edgy hobby. I've learned a thing and english ist not my native language. So really good job. xD I'll stay around some time. ☕
Samsung hides this component, so I checked on what it really does. Blacklisted power banks, stolen ones use the winding to self drain the battery, it becomes very hot. During normal charging it is warm. It is designed to self maintain the battery during normal use. I am not sure, if it has radioactive memory effect for a while after it is bought.
It raised some questions about where the MOSFET's gate is hooked up. why didn't explain about the capacitor and push switch? why you didn't show the final & the whole schematic with their component numbers/values?
Adding a capacitor can lead to a less uniform current waveform which makes this kind of very basic control less stable. If you make this circuit properly with a microcontroller adding a capacitor would make more sense. I will try and make a video covering that in the next few weeks if I find time.
@electricarc240 just subscribed yesterday & been watching some of your old videos. Not made it far yet but wanted to say i have a somewhat uniquely compromised problem. 3-phase motor that only needs to run at a single (base) speed. 850, 1750 or 3450RPM depending on pole pairs of the motor. We inly have single phase 240v (120v +/-) to use. The waste water pump is what we are making. Can we control / run the pump with the windings as the inductor side? Sure a VFD could be used but the enviroment is bad so solidstate small discretely built components may hold up long term much better for a 16 amp motor specific design? Than will keep watching.
I don't know much about industrial stuff, but if you need to run a 3-phase motor from a single phase supply I'd definitely try to stick with a VFD. Maybe look for extra robust ones or fully sealed units
@electrarc240 what we want to do is put the electronics into the pump cap (submersible pump) and pot the components so that it runs single speed when power is applied. VFDs are way too costly for this application, household sewage ejector pumps. Price is paramount & if we can run the 3 phase motor without the required capacitors etc maybe it would be a better idea?
@electrarc240 we have single phase motors, they are a bit of a issue with the start components & spikes on the lines. Starting & stopping 5 or 10 times an hour also can cause those start caps/relays to go south in a few short months on the small basins. Why we were / are looking at simple solutions for 3 phase conversions, (DPS) units have to be tailored & seem to have similar issues.
Fred, I've looked over your LinkedIn Profile, and I have sent you an invitation to link with me if you wish. If I may offer a small piece of advice. Your "I'm crazy passionate about (Power) electronics" is or will limit your career development going forward, and I must say after reviewing you on LinkedIn, you seem to lack a broader experience base in the field of Electronic Engineering. Switch-Mode PSUs have been around in consumer electronics since before you were born, I was dealing with them during the 1970s, of course, the power requirements in today's Automotive applications are somewhat different (I ran an Electronics design Laboratory for one of the largest blue-chip Car manufacturers in the world). One of the areas I would perhaps suggest you would like to encompass more in your development is Telecommunications, but whatever you do, don't become a "one trick pony" . Interesting Videos 👋
I think the content on my channel shows that I focus on a range of things, but I think if one has to be a "one trick pony" automotive power electronics is the place to be. Not sure how being passionate will limit my career as that is a very rare trait these days. At university I would say 1 in 100 students are actually passionate for the subject and the rest are there for money or because of family pressure. Also back to RF I made a (bad) radio transmitter when I was 16 and it wiped out the villages internet every time I turned it on, Openreach vans started turning up all over the place so that's kinda put me off. Power electronics isn't regulated in the same way so I can actually have fun.
@@electrarc240 You say: "At university, I would say 1 in 100 students are actually passionate for the subject" Fred, like yourself my career started as a passionate hobby, Uni wasn't an option for me in my teens, my path was via Trainee and part-time release to Technical college, my technical training in Radio & Television Broadcasting took 4 years. In those days we used a Slide Rule for 'principals & calculations', if you had to use one you might well be forgiven for thinking it was a "back scratcher",😀 also all my examination sessions were written, and no coursework was taken into consideration. You Passed or Failed "on the day". If you were "ahead of the curve" in your student years, like me, you had classmates that thought you were just a plain weirdo/geek & you had the pi*s taken out of you right, or worse. All I saying is: 'I get it' when it comes to passion okay. I'm just trying to give you some friendly advice as a guy who spent some 40+ years in Electronics, ignore it if you want, that's entirely up to you. Firstly your "passion" may well have to come down to earth with a bump someday soon, when you have kids & a wife/partner, we all 'Work' because we need the money right, or are you quite okay to work for your "Passion" voluntarily? Maybe you still live with your mum & dad. Okay let me tell you some 'Facts of Life' regarding Engineering in the UK, I don't give a "tinker's cuss" who your current employer is. Engineering isn't a highly respected/ highly paid occupation in the UK, when you want/need the bigger bucks you'll have to move to Germany or side shift into Management, and your passion has to die for the greater good, at least for the hands-on side of Engineering. When I took early retirement from the Automotive sector my salary in 2009 was six figures. I doubt if you are anywhere near that in your current position. Whatever you can do in the UK, there's some guy, just as smart as you in China, that can do your job for the 'China Price". I'm telling you some truths here Fred. Telecommunications, Medical Electronics, NDT Principles & Techniques, are only a few of the huge and diverse areas of specialisms which now encompass 'Electronic Engineering'. Of course, you do what you have to do for "fun" but: "I love designing 'Switch Mode PSUs' won't get you where you need to be for the rest of your life! Spread your wings! Anyway, that my dear Fred is that, I have no more I wish to say or add as I am sure you'll choose your own path. I wish you well in your career 😉👍
@@telboy911I’ve never done this for money, I could have chosen a simple three year degree and already have graduated earning double what I am now but I chose the longest course because it’s what I enjoy. I could’ve worked somewhere else but picked F1 (twice) because of my interest and the fact it’s the best place to learn fast. Money isn’t really a problem for me so I see no reason to leave, there are plenty of interesting positions in the UK that pay plenty well enough for my simple lifestyle. This is genuinely all I do every day of every week, I get back from work at 7pm after doing electronics all day and stay up till 11pm doing more electronics at home. Weekends more of the same, this is actually my one and only occupation in life (bit sad I know). In reality my true passion is for teaching and doing this kind of thing (RUclips), if I can keep up my current views I can live off this which would be my dream. It’s like teaching at uni but the people watching actually care. Though I’d want to do something else too to stay “relevant” and keep learning. Also I do a lot more than is seen here and on my LinkedIn, I’ve been doing electronics for about half my life and I’m only 20, so I’ve had plenty of time to dabble in many fields, I’ve simply honed in on the one I find most interesting. Hopefully you’ll see over the next few months that I am not just a one trick pony
college student? equations are good except that E = - Ldi/dt. you connected the scope clip to the positive power and the scope readings are upside down. seems like a little bit of a mess. when you first saw the flyback pulse going down that should have been your clue to correct the scope probe connections.
The clip is on the source terminal of the MOSFET to allow simultaneous measurement of Vgs, Vds, and Ids (inverted). Connecting different ground clips to different potentials would have resulted in a little bit of a mess.
It's great that you show the equations, explain and apply them into real circuits + you don't play a distracting bg music. 👍✌
I usually try to avoid equations to keep things simple, I only show them if I can prove them to you all with a real demo! Thanks
@@electrarc240 Keep up the good work.
In the waveform where the voltage is going to 85 volts, that particular voltage has nothing to do with the inductor, as such. It is the result of causing the body diode of the MOSFET to avalanche. It stays at the avalance voltage until the energy stored in the inductor been discharged.
Avalanching the diode can be destructive if there is sufficient available energy/power (they are generally rated separately, hence the slash). In some circumstances it is perfectly safe to allow it.
Note that at all times the drain of the FET is positive with respect to its source.
Yes, interesting point from @d614gakadoug9.
Fred, I've looked over your LinkedIn Profile, and I have sent you an invitation to link with me if you wish. If I may offer a small piece of advice. Your "I'm crazy passionate about (Power) electronics" is or will limit your career development going forward, and I must say after reviewing you on LinkedIn, you seem to lack a broader experience base in the field of Electronic Engineering. Switch-Mode PSUs have been around in consumer electronics since before you were born, I was dealing with them during the 1970s, of course, the power requirements in today's Automotive applications are somewhat different (I ran an Electronics design Laboratory for one of the largest blue-chip Car manufacturers in the world). One of the areas I would perhaps suggest you would like to encompass more in your development is Telecommunications, but whatever you do, don't become a "one trick pony" 😉
Well, I'll be damned. I don't believe I've ever run across such an understandable explanation of a constant current driver circuit. Cheers, mate!
Bro, this is absolutely GOLD. Can't express how simple you made it. I wish I could have this level of understanding!
Wow thank you very much!
understanding of what?? 🙄🙄🤪🤪
Best an most informative video on youtube for simple circuits, for all of us that only know basics. Please keep them coming. Thank You
Thanks, more to come!
I found your channel just a few hours ago but I'm sure I'll watch all your videos starting with the first. I love your style and your clear and logical approach. 😊😊❤❤
That was one of the if "NOT" the best explanation of PWM an inductor.
Yoy just got a new subscription. 👍☺️🇮🇪
A wee bit of calculus without mentioning it. Nice. LOL. Seriously, I like the presentation. You would have lost a lot of the audience if you'd gone the full dt/dx and first second derivatives, eh? The fascinating thing is how dynamic inductance / capacitance phenomena are, and how our 'maths' can tame them! Thumbs up!
11:39
"Ah, yeah. It's all comin' together"
But seriously. Getting a feeling I'm actually getting a handle on this stuff, lol. 13:08 Agreed, man.
Superb presentation skills! I have watched a lot of RUclips on the topic, and few are as good as this channel. I wonder if the glamor face close-ups are a bit off-putting to the browsing electronics hobbyist. Keep the camera on the topic and let your butter voice unravel the near-insurmountable mysteries of electricity.
Thank you very much! And yes I’ve been working more on hiding my money maker!
@@electrarc240 Please forgive my rudeness. You are a gifted, talented, genius teacher; let no one tell you otherwise!
@shawncalderon4950 ah don’t worry you weren’t rude I’ve had much worse haha! Thank you again, I’m hoping to make more videos in a few months when I’m done with uni.
@@electrarc240 Is uni short for university? I'm a retired military veteran from Chicago and am unfamiliar with that abbreviation.
Yes it’s for university. I will be working next year so should have more time for this. I’ve been very busy this year
Hi ,thanks , the beauty of your series is we can watch it over and over again until we understand haha. Keep them coming, many thanks.
Please make a video about Oscilloscope, i am a hobbyist and i love to see a video made by your way of explanation
Hmm that's a good idea, I usually avoid using them because they can confuse people, so clearly they need a video making about them!
I'm stuck on a problem I need a solution to! Think this video may be close to the solution.
I need a Vampire power supply, that can give a regulated 5v dc @1amp,
No matter what the AC input voltage is.
An operational example:
Have an electronic dimmer on a lighting circuit say 100w bulb we need to generate the 5v dc no matter what that Dimmer or Variac is set to (20 to 100 percent)
Any help is be appreciated.
Love your videos they are very Good, You right get to the point, and you are good at making them understandable for us average folk.
A simple linear regulator like a generic 7805 is the simplest way to get 5VDC@1A, I would use one of those as the final stage of a PSU, but they can only take up to around 35VDC on the input so preceding that you'd want something else. simplest would be a transformer with a rectifier such that the output would always be between 35VDC and maybe 7VDC. this wouldn't be very efficient or compact though. Really you want a switch-mode PSU which you could maybe achieve by rectifying the mains directly then feeding it through a circuit similar to this, but with voltage feedback rather than current. This wouldn't be isolated though so definitely shouldn't be used for anything a human could come into contact with. I'd look into buck converters, or forward converters if you need the isolation.
Good job mate. Yours is one of the many videos and variations in explaining electronic components and in each video I am able to glean knowledge. This video helped me understand the link between a mosfet and inductor.
I already knew the subject, but clicked out of curiosity. Quite a good explanation, i approve
Simple projects 👍
AMAZINGLY well done!! NEVER seen anyone explain concepts and relations this clearly and using the actual components to demo! If you wouldn't mind, would you ping me to check an explanation on MOSFETs in a circuit I'm preparing? Much appreciated and keep this up! Much needed!
If id had a teacher like you, id have been something.
You do now! It’s never too late to learn :)
when first learned about inductors I was amazed by what they can do for example a "boost converter"
Yeah same, still not over the initial excitement of that revelation tbh 😂
Really nice explanation with real components and scope screen. Thank you!
Thank you for proving that the driver I designed will work. I'm using an h bridge to isolate and increasing voltage on the secondary then running a bunch of 50w COBs in series, limiting the current to 1.5A. That 200ma window using a flipflop and comparators, maybe a little signal filtration and there's uninterrupted light, which is ideal.
Best video I ever had. Answers to all of my question going in mind. What inductor is doing in the circuit,... :D
More ElecrArc in my life is always a good thing, keep it up! Also that's a fancy outro you've got now.
Very informative, thanks a lot
Thank!
Very nicely explained ! you would be a good teacher !!
Maybe one day I will be one!
Excellent explanation and demo
This single video on inductors has made me immediately wonder if some of my circuit designs are wrong. Working with Arduinos and purely digital circuits mostly for signalling, I suspect in some circumstances, I may need to revisit my designs. Cheers!
Totally awesome video and I've never heard it explained like this.
This video is Gold! Tank you for taking the time.
Great explanation as always. Thank you very much, I'm looking forward to the next ones!
Thanks, glad you enjoyed it!
I just subscribed after watching your popular video about power supplies. I know enough to be dangerous.
I'm commenting about an extremely popular problem that I'm sure would get many views.
I (like thousands of others) bought a VFD and read in the manual that I should have "AC reactor" and an "Input EMC filter" before the VFD. (My VFD powers a 3hp motor that is normally 3 phase but the best I can do is single phase 240v).
As for the AC reactor ebay has them for around $300 which is what I paid for the vfd. I've been told I can use a used 3 phase one if I use the outer 2 coils. Then I found a guy who made one for less than $20 by cutting an iron pipe and wrapping wire around it. He ended up with around 5% inductance, which is what is recommended.
I am not alone with this problem. If you could made video about it I'm sure you would get everyone who bought a vfd to watch it.
Should I buy one of those big 3 phase ones, could I make one with an iron torroid, how does one size a filter, how about just a surge protector, where do babies come from, what is the capital of South Dakota? All these questions keep me up at night.
Thanks for your great videos
Hmm pipe sounds a bit dodgy I would imagine there would be a lot of losses. I can have a look into it though as I recently got the kit to characterise inductors so can test custom ones. As for babies, absolutely no idea I'm afraid...
Perfect explanation, enjoyed to watch, keep on going!
Thanks!
A very important video Sir
I like these videos. Very clear and well explained. I also learn stuff :-) Well done and thank you.
Thank you very much!
MASTER TEACHER THANK YOU!
Thanks!
Great math explanation
nice job sir
Good explanation, thanks.
Glad it was helpful!
Very nice videos, I like your step by step methodology in presenting subjects, subscribed instantly.
The inductor is the analog compliment of the capacitor: a capacitor once charged would short-circuit (lose charge) if we touch its leads, an inductor needs its leads connected once charged so that it does not lose charge (and keep the magnetism not collapsing)!
In a perfect world where the inductor was made out of a super-conductor, the current would keep on going. In this world we are in, however, we have ohmic losses, so an inductor cannot possibly compete with a capacitor in this area. A capacitor can remain charged with no losses, indefinitely. Therefore, in any power systems where you care about efficiency, you would use a capacitive design, as they do for mobile phones (the voltages are upped or downed with putting capacitors dynamically in series and parallel, and the current is supplied by how many charge transfers you do).
In the design here, you are using a diode to keep its leads connected in the off-cycle, and this introduces a huge amount of losses. You see, a photovoltaic cell, an LED and a diode are the EXACT same devices (believe it or not!), with a slight change in bang gaps. The simple p-n silicon diode is like effectively having an infrared LED turning on every time it is forward biased!! The perfect solution here is to have a field effect transistor also on the top side, instead of the diode! You energise it when you de-energise the bottom one, so you could have it on a single wire if you use p and n types for the top and bottom transistors respectively. That way you have extremely low losses (a good transistor nowadays has a resistance at the range of milli-ohms when turned on, it has a negligible voltage drop).
Also, for very high frequencies, or for excellent synchronisation of the two transistors, you could count the nano-seconds it takes to energise and de-energise the gate for each one, depending on the voltage you are supplying, and you could apply the correction time offset with a microcontroller.
If you are wondering how you could connect both of the mosfets on a single signal, on a single wire, you could have a look at the videos I have uploaded on my channel regarding the CMOS not gate.
Best regards :)
Superconducting inductor, sounds like an MRI scanner. Thanks for all the info!
@@electrarc240 Yes, they use them there... An inductor like that would be very happy in a closed circuit. It would be the equivalent of the quality we enjoy with capacitors: the charge is not lost, until you need it.
For example, in a system like that, once you do the initial charging, you would leave the top transistor closed while opening the bottom one. The energy would just exist as a magnetic field, until you need it.
@@BillDemos Oh how we dream... Maybe one day
Brilliantly explained thank you.
I love your analysis.
Perfect explanation 😊
Thanks...Nice explanation.
a really good video, well explained, smart young man.
Great video! You explained this subject so well. Thanks!
Very nice I've basically just startet making this my new edgy hobby. I've learned a thing and english ist not my native language. So really good job. xD I'll stay around some time.
☕
Great explanation!! ⭐️⭐️⭐️⭐️⭐️
Awesome video, subscribed !
Thanks for the sub!
Just found you and I subed. Thank you for this work. Appreciate it.
Good video.
Very well explained! Congratulations"! I'll be looking for your following video.
Execellent . A little to fast explanation.
So nice thanks
Great description and explanation. 👌
My arsenal full of great content said your channel will fit in just nice and never sooner. New Sub earned.
Well done. Well done.
Excellent resource, thanks.
Samsung hides this component, so I checked on what it really does. Blacklisted power banks, stolen ones use the winding to self drain the battery, it becomes very hot. During normal charging it is warm. It is designed to self maintain the battery during normal use. I am not sure, if it has radioactive memory effect for a while after it is bought.
Love the videos. Keep ingoing. Pretty sure the youtube algorithm will push you soon :-)
Thanks!
Video put together well. Subscribed.
It raised some questions about where the MOSFET's gate is hooked up. why didn't explain about the capacitor and push switch? why you didn't show the final & the whole schematic with their component numbers/values?
Thank you
Awesome!
nice proj
ect
It would be good if you use the right units in the formula,t in ? L in ?
15:00 the inductor current limit is presumably your powersupply current limit ?
What is the current limit defined by?
The 2A limit is from the power supply
Wouldn't a capacitor at the output reduce the ripple?
Adding a capacitor can lead to a less uniform current waveform which makes this kind of very basic control less stable. If you make this circuit properly with a microcontroller adding a capacitor would make more sense. I will try and make a video covering that in the next few weeks if I find time.
I have an inverter which is internally arcing, coming from some sort of inductor...any ideas?
What kind of inverter? Motor drive or DC -> mains kinda thing?
its the collapse of the magnetic field that generates that voltage spike @ 10:00
What if we don't believe the equation or your oscilloscope? Could you please lick the inductor, turn it on and tell us how it feels?
Tesla knew this instinctively
@electricarc240 just subscribed yesterday & been watching some of your old videos. Not made it far yet but wanted to say i have a somewhat uniquely compromised problem.
3-phase motor that only needs to run at a single (base) speed. 850, 1750 or 3450RPM depending on pole pairs of the motor. We inly have single phase 240v (120v +/-) to use. The waste water pump is what we are making.
Can we control / run the pump with the windings as the inductor side? Sure a VFD could be used but the enviroment is bad so solidstate small discretely built components may hold up long term much better for a 16 amp motor specific design?
Than will keep watching.
I don't know much about industrial stuff, but if you need to run a 3-phase motor from a single phase supply I'd definitely try to stick with a VFD. Maybe look for extra robust ones or fully sealed units
@electrarc240 what we want to do is put the electronics into the pump cap (submersible pump) and pot the components so that it runs single speed when power is applied. VFDs are way too costly for this application, household sewage ejector pumps. Price is paramount & if we can run the 3 phase motor without the required capacitors etc maybe it would be a better idea?
@@markmatt9174 And you can't use a single-phase motor? I'm not sure you can do any shaded-pole trickery for a three-phase motor but I may be wrong
@electrarc240 we have single phase motors, they are a bit of a issue with the start components & spikes on the lines. Starting & stopping 5 or 10 times an hour also can cause those start caps/relays to go south in a few short months on the small basins.
Why we were / are looking at simple solutions for 3 phase conversions, (DPS) units have to be tailored & seem to have similar issues.
Like your videos sir
Glad to hear that!
🎉❤
What's the number of this MOSFET?
Toshiba K30A06N1
Yes but you controll current with voltage, but you monitor the current.
"Too" instead of "to"
Framing... slide that camera back a foot or two.
I like the framing as it is…
Fred, I've looked over your LinkedIn Profile, and I have sent you an invitation to link with me if you wish. If I may offer a small piece of advice. Your "I'm crazy passionate about (Power) electronics" is or will limit your career development going forward, and I must say after reviewing you on LinkedIn, you seem to lack a broader experience base in the field of Electronic Engineering. Switch-Mode PSUs have been around in consumer electronics since before you were born, I was dealing with them during the 1970s, of course, the power requirements in today's Automotive applications are somewhat different (I ran an Electronics design Laboratory for one of the largest blue-chip Car manufacturers in the world). One of the areas I would perhaps suggest you would like to encompass more in your development is Telecommunications, but whatever you do, don't become a "one trick pony" . Interesting Videos 👋
I think the content on my channel shows that I focus on a range of things, but I think if one has to be a "one trick pony" automotive power electronics is the place to be. Not sure how being passionate will limit my career as that is a very rare trait these days. At university I would say 1 in 100 students are actually passionate for the subject and the rest are there for money or because of family pressure. Also back to RF I made a (bad) radio transmitter when I was 16 and it wiped out the villages internet every time I turned it on, Openreach vans started turning up all over the place so that's kinda put me off. Power electronics isn't regulated in the same way so I can actually have fun.
@@electrarc240 You say: "At university, I would say 1 in 100 students are actually passionate for the subject"
Fred, like yourself my career started as a passionate hobby, Uni wasn't an option for me in my teens, my path was via Trainee and part-time release to Technical college, my technical training in Radio & Television Broadcasting took 4 years. In those days we used a Slide Rule for 'principals & calculations', if you had to use one you might well be forgiven for thinking it was a "back scratcher",😀 also all my examination sessions were written, and no coursework was taken into consideration. You Passed or Failed "on the day". If you were "ahead of the curve" in your student years, like me, you had classmates that thought you were just a plain weirdo/geek & you had the pi*s taken out of you right, or worse. All I saying is: 'I get it' when it comes to passion okay. I'm just trying to give you some friendly advice as a guy who spent some 40+ years in Electronics, ignore it if you want, that's entirely up to you.
Firstly your "passion" may well have to come down to earth with a bump someday soon, when you have kids & a wife/partner, we all 'Work' because we need the money right, or are you quite okay to work for your "Passion" voluntarily? Maybe you still live with your mum & dad. Okay let me tell you some 'Facts of Life' regarding Engineering in the UK, I don't give a "tinker's cuss" who your current employer is. Engineering isn't a highly respected/ highly paid occupation in the UK, when you want/need the bigger bucks you'll have to move to Germany or side shift into Management, and your passion has to die for the greater good, at least for the hands-on side of Engineering. When I took early retirement from the Automotive sector my salary in 2009 was six figures. I doubt if you are anywhere near that in your current position. Whatever you can do in the UK, there's some guy, just as smart as you in China, that can do your job for the 'China Price". I'm telling you some truths here Fred.
Telecommunications, Medical Electronics, NDT Principles & Techniques, are only a few of the huge and diverse areas of specialisms which now encompass 'Electronic Engineering'. Of course, you do what you have to do for "fun" but: "I love designing 'Switch Mode PSUs' won't get you where you need to be for the rest of your life! Spread your wings! Anyway, that my dear Fred is that, I have no more I wish to say or add as I am sure you'll choose your own path. I wish you well in your career 😉👍
@@telboy911I’ve never done this for money, I could have chosen a simple three year degree and already have graduated earning double what I am now but I chose the longest course because it’s what I enjoy. I could’ve worked somewhere else but picked F1 (twice) because of my interest and the fact it’s the best place to learn fast. Money isn’t really a problem for me so I see no reason to leave, there are plenty of interesting positions in the UK that pay plenty well enough for my simple lifestyle. This is genuinely all I do every day of every week, I get back from work at 7pm after doing electronics all day and stay up till 11pm doing more electronics at home. Weekends more of the same, this is actually my one and only occupation in life (bit sad I know). In reality my true passion is for teaching and doing this kind of thing (RUclips), if I can keep up my current views I can live off this which would be my dream. It’s like teaching at uni but the people watching actually care. Though I’d want to do something else too to stay “relevant” and keep learning. Also I do a lot more than is seen here and on my LinkedIn, I’ve been doing electronics for about half my life and I’m only 20, so I’ve had plenty of time to dabble in many fields, I’ve simply honed in on the one I find most interesting. Hopefully you’ll see over the next few months that I am not just a one trick pony
Bro brush them teeth
Welcome to England my friend
6:47 - You speak out your mouth, not your eyes.
college student? equations are good except that E = - Ldi/dt. you connected the scope clip to the positive power and the scope readings are upside down. seems like a little bit of a mess. when you first saw the flyback pulse going down that should have been your clue to correct the scope probe connections.
The clip is on the source terminal of the MOSFET to allow simultaneous measurement of Vgs, Vds, and Ids (inverted). Connecting different ground clips to different potentials would have resulted in a little bit of a mess.
Very nice and practical explanation.
Thanks 👍