I am electrical engineering student I'm very interested in electrical motor design, you videos are very informative , it would be great if you explained the slotless or coreless motor
Thank you for your feedback. Your idea is very good and I have put it on my task list. I've had so many client projects in the last few months that I haven't had time to make new videos. But I hope that I can still make 2 or 3 this year. Where are you studying, if I may ask?
That's a good video, in my opinion Can you go a little bit slower? For someone , like me, english is a secondary language, so it became a bit difficult understood at this velocity. Thanks for your work, and for helping to understand this argument
That's a good point. The problem is that when I speak too slowly, people switch off faster. But I will try to speak more clearly and simply. What is your native language, if you don't mind me asking?
Hi, thank you for the information in the video, I would like to know the losses of magnetic field what type of losses, and changing the medium between the stator and the rotor how it can affect the losses, or increasing the gap size between them if we can estimate how the efficiency will be affected. Thank you
Especially with induction motors and reluctance motors, a large air gap leads to poor efficiency. However, the additional losses do not occur in the air gap but in the sheet metal or copper. In motors with permanent magnets, the air gap can be made larger without much influence on the efficiency. However, more or stronger magnets are needed. If the air gap is filled with water or oil, additional mechanical losses occur, which reduce the efficiency of the motor. Liquids can also contain electrically conductive material, in which case electromagnetic losses also occur. What exactly do you want to implement? You can also write me a message via my website.
Hallo Markus, deine Videos gefallen mir. Als ich entdeckte, dass du aus Berlin kommst, entschied ich mich gleich in die Kommentar etwas zu schreiben. I’m a 26-year-old young guy from China. I’m in the business of neodymium magnets and magnetic assemblies, but now trying to expand to BLDC motor and controller field. That’s why I’m learning everything about electric motors. You have German accent when speaking English, which I find interesting. Danke für deine volle Videos!
it's a great presentation! 1-I hope you talk about motor winding ... like length, diameter size and number of turns of the wire and voltage/amper limits of motor winding 2-coreless (slot-less) motor ... is it become inefficient in large applications? 3- BLDC Golden motor ... how this small motor work in huge power?
Sorry for my late reply. Large slotless motors are not so bad. But a big problem is the heat dissipation that occurs in the windings. Therefore, a large motor without slots cannot deliver such high performance. The motors from golden Motor don't look bad, but my experience is that you have to adjust the control system to be able to use the full potential. What do you want to use the motor for?
@@Electric-Motor thank you for replying♥️ but what about winding... I mean if you want to design a motor with specific amount of current and voltage. such as 200mA , 220V how you could know the length of the wire and the diameter.... I tried to use ohm law ... the resistance of 0.32mm AWG is 212 ohm per Km ... so for 220v I need 5Km of wire (3.6Kg) but motor with same power has less wire
To design a motor you need a software where you can enter the number of windings, motor dimensions and magnet material. The software then calculates the speed / torque characteristic. Such software tools are usually very expensive, because they are only used by a few people. My tip would be to get a motor that roughly meets your requirements and adapt it. So for example adapt the windings and the magnet material. Then you can better make your own calculations and check them. You haven't told me yet what you want to use the motor for? Maybe I have an idea where you can get one cheap.
@@Electric-Motor the motor is for a electric vehicle... but I'm trying to design a small prototype... I'm trying to use the work concept of universal motor and reluctance motor
That sounds interesting. But did I understand you correctly that you want to build a reluctance motor with brushes? And if so, what would be the advantage?
So, I live in Alaska and the mains electric isn't very reliable sometimes, so I use a generator sometimes... The generator I use used to work perfectly, but then I hooked up a power tool and it seemed to "break" the generator... I tested the output at the plug, and it is only producing 5 volts now, so I tried exciting the field windings with a car battery and only got about double the voltage... what else can I try? It just occurred to me it might have slip rings and if so, this is where i need to apply the voltage in order to figure out where the problem is coming from ?
Hi thanks for your question, however I probably can't really help you there. It will probably be a separately excited generator or? The excitation voltage for the rotor could be too low. If the motor has drawn too much current, the stator winding could also have a short circuit and therefore less voltage. Have you looked at the voltage from the generator with an oscilloscope? Please remember that high voltages and currents can be life dangerous.
If the electric motor produces noise, it comes from mechanical vibration. The energy which is consumed for the vibration counts of course to the losses. An efficient motor usually generates very little vibration. Do you think I should have added vibration as an additional type of mechanical loss?
I'm working on 1.5kw BLDC Motor Design and prototyping. While testing the I'm facing lot of losses. Motor is running at its maximum rpm at 8 amps on 64 volts without any load. Would you please help to figure out how to calculate the exact gauge of winding wire, number of turns and number of strands.? And for Prototype I've used 2.5mm mild steel plates to make 50mm of stack. Should the plates be insulated to minimise the eddy current losses.?
Hi, I'm happy to help you but I need more information about your motor. The plates are definitely too thick, normally 0.35mm thick plates are used, but 0.5 millimeters will do. But it depends on the speed, how fast do you want the motor to turn? What do you want to use the motor for? And yes the sheets must be isolated from each other!
@@Electric-Motor Thank You for replying, I'm happy. ruclips.net/video/z3jzvDN5E08/видео.html see the motor how it is looks like. This is 3d printed though, but later I replaced stator and rotor with mild steel. Yes, the plates are too thick and not insulated and also it mild steel plates, that's definitely the main reason of losses. Apart from that I have to calculate exact number of turns and strands. I want to use the Motor for an E-Bike and for that I need the motor to run at 8000 to 10000 rpm and max Torque I'll need between 5 to 7 Nm. No. of poles 8, no. of slots 12, stack length 50mm, stator bore 80mm, rotor OD 78mm, stator OD 130mm. Slot depth 18mm. See the more pictures of my Motor. www.linkedin.com/posts/jatan-patel-222a9615b_bldcmotor-3dprints-activity-6817878626604855297-ezXW
I have added you on LinkedIn. Maybe we can support each other in promoting content on LinkedIn. If you have any questions, I'd be happy to help. What kind of position sensor do you use because that's often a big problem?
Many manufacturers provide the specifications for their electrical sheets. Otherwise, you have to measure the materials yourself. For example, with an Epstein frame.
I tend to look at the topic in general and try to give as many people as possible an added value. But maybe I can be a little more detailed here and there and go into the materials you mentioned. But I will be able to cover the topic of electrical sheets only in the next but one video. What field do you work in, if you don't mind me asking?
Very good idea! The video about servo motors with SPMSM is already in preparation. But it will take 2 months until I can make it ready. Thanks for your comment it helps a lot to get more views
Please I need your help agently am trying to run three ac motor of 5.5hp on single phase source of electricity but if am trying to run all the three motor usually one of them will have a problem with the starting winding (burnt) what could be the problem
Very interesting material for learning motor design. I am working using motorcad for electromagentic motor degisn, do you have any guide or book about the design flow, design process and recomendations for this software?
Of course, it depends on the motor type. But in general, you can rewind the stator to a lower voltage, for example 48V. In simple terms, fewer turns with a thicker wire for a lower voltage.
So then ,wouldn't a motor made of vanadium dioxside, alloy would be a great choice for cooling. That it reduce heat losses. also if the motor didn't have metal bearings. but instead had electromagnet bearings with very tight tolerances That would suspend the motor shaft when switched on then as the Rpms increased the voltage/current also increased on the bearings to m further stabilize the spinning motor and have no friction losses
Is there a good book on electric generator design? I'm looking at making a wind generator. I want it to work well with lower wind speeds of around 15 mph. I've seen a lot of videos about the subject but many of them are contradictory and I was wondering if there is a good reference book for this sort of thing. I need to know what shape everything is supposed to be... windings, magnets, cores, etc. I need to know what quantity of components is optimal. Six coils or nine or twelve? What gauge of wire to use. How many windings should be in each coil. Obviously these are a lot of questions. But every time I go looking for a reference book about this I get lost. Is there a good book that will answer my questions so I can design this thing? Thank you for your time.
Hello a good book I can not recommend you unfortunately. Most of them are written by professors and have no direct reference to practice. That's why I also make the videos so that you understand without much prior knowledge erverything. Whether you design an motor or generator is actually very similar and on the subject of motor design you will find more information. To get you started, I would recommend buying a cheap motor and adjusting the winding to your speed and voltage. This will not give you a perfect result but you will get a first result quickly. What power and voltage should your generator / motor have?
@@Electric-Motor It will be a 10ft diameter blade which at 15 mph and at 30% efficiency would have 1500 watts. Keep in mind, wind speed varies so at 5 mph it would produce about 200 watts at the same efficiency. Voltage can be stepped up or down. Something above 52 volts and less than 72 volts is preferred. Speeds above 20mph could be dangerous and the system would stop the blade from turning in higher wind speeds. And I would make a point of securing the system in intense weather. What I'm mostly interested in is getting the highest possible efficiency in low wind conditions. So 5 and 7 mph which is about a range of 200 to 550 watts. That would be normal operating conditions. Given that the generator will likely be a three phase AC system, internal use will need to be DC, and DC voltage will need to be kept at usable ranges... I will have to use an AC to DC rectifier... the quality of the DC output at that stage is not important as the voltage will just be for batteries. And a DC to DC voltage converter will have to be used to increase or decrease the generator's voltage to something compatible with my power system. Again, most desirable feature is high power efficiency at low wind speeds. The value of this will be providing enough power at night to keep always on systems powered so they don't drain the battery at night. Thank you for your time. I would also suggest given the nature of your channel, this might be something other people are interested in learning about given the trouble with energy in the world right now. For my own purposes, my boat will be off grid regardless. But For other people perhaps simple small generators that capture energy at their homes might be something people find interesting. You know more about this subject than most people that talk about it on youtube. In depth explanation of the pros and cons of different designs for different generation conditions would be very interesting.
@@diogenes848 Sorry for my late message. It is quite expensive to build a generator for your wind turbine. I am a sailor myself, so my question is why don't you just buy a wind turbine? What problem do you have with the current solutions on the market?
@@Electric-Motor I'm interested in learning new things. I wanted to understand the principles so that I could at the very least design what I want on paper. Even if I don't make it being able to represent the principles on paper accounting for all the issues is interesting to me. I've been looking around... I think there is a book by Hugh Piggott that might help me. In addition to the wind turbine I'll also be building a hydrogenerator as well so that I can generate power whilst under sail. Each generator has different rates of rotation and torque on the blades... and configuring the motor properly increases efficiency. Without more information, I'll have to either do more research which is fine or experiment which could be expensive as there will be failures. I'm reaching out to people on the internet to avoid making these mistakes.
Thank you for your question. A perfect motor would have one hundred percent efficiency and no mass. So nothing is impossible but it will take maybe one or two centuries until we are ready ;-) but we are working on it.
@@Electric-Motor what do you think if a power generator will be the one who provide power for the elec motor then step up the electricity like a transformer so the requirement of the motor will meet, is it possible?
@@lopnajhardcoremetal7686 If I have understood you correctly, you want to generate electricity with a generator and the generator is to be driven with a motor that is fed with the electricity from the generator, have I understood you correctly?
@@Electric-Motor wait, example like tesla. Battery>inverter>electric motor. Right? This one is like this. Electric motor>generator>step up transformer> electric motor with deffirential.
Sorry that I make so many hand movements. People then watch the video longer. But I will try that the hand movements have more relation to the content. Thanks for your feedback and have a nice weekend
Depends on the power of the generator. In the megawatt range, separately excited synchronous motors make sense. For small wind turbines PMSM are more suitable. For what application and what power exactly are you looking for a generator?
@@happyatheists9361 Of course I don't know all your requirements, but I would probably use a BLDC motor with external magnets for high efficiency. Are you developing a product or just doing a DIY project?
@OSWOS I have a question there is a video of BLCD motor .. ruclips.net/video/SQvZ-FLwFX0/видео.html the rotation speed of the motor increases when stator left out the rotor.... why this happens? hope you do a short video about it .. Thank you Sir
Thanks for your great question, this is an interesting video! When the stator is pulled out of the rotor, the back EMF decreases. The back EMF is the voltage that the motor generates when it is turned quickly by hand, for example. The faster you turn the higher the voltage you can measure. If the voltage is too high, the phase current will decrease and the motor will no longer speed up. You can lower the voltage of the back EMF by using less powerful magnets and thus increase the speed. This is exactly what happens in the video, by pulling out the stator, the back EMF is lowered and the speed can be increased. If the stator were not pushed back, it would require a higher phase current at a lower speed because the back EMF has dropped. Please give me a feedback if you have understood this?
@@Electric-Motor Now I got it!! this answer led me to several questions ... Now I know why the motor has a small amount of wires, because it depends not only on the resistance of the wire, but also on the “~resistance” generated by the reverse voltage of back EMF .... am I right? Sorry for late reply I spent the whole day trying to understand Thank you so much, you are a wonderful entity 💎
@@ahmedshfra9746 Thank you for your compliment. Exactly the voltage of the back EMF prevents the current in the windings from increasing. If the voltage of the back EMF becomes too high, the motor can no longer speed up. Thanks again for your question and I wish you a high efficiency.
this is all the stuff i was reading in textbooks back when i was ten or so. all very basic and simple. i cant stand watching someone simply TALKING, and waving tehir hands around. wheres some practical demonstartions? like, hey, heres three coils of different gauges, same turns, same ampere turns... lets see which one heats up fastest... thats your ohmic losses. heres some iron, lets give it a taste of varying frequencies... theres your core loss, theres a BH loop, the hysteresis loss... or, iunno. heres a coil. on a core. with an adjustable gap. look at how we can vary the current and ohmic losses of the coil by varying the gap! see how it changes on teh scope in relation to the gap and the reluctance of the magnetic circuit? hey look, heres a welding transformer. see how the core moves, and alters the coupling, the current, when we have a fixed input supply and a fixed output load? its all related... now we have nice practical demonstrations of various principles, and we can walk away feeling we actually learnt something tangible, useful. oh. wait. we didnt use a scope. instead we had some guy stand there talking and waving his arms around. who wants practical when you can have theory and only just scratch the surface? if i didnt alredy know all this, it would be in one ear and out the other. as it is, the whole video was rather pointless. to me, this is sort of like watching an educational film targeted towards 8 year olds.
dont know what you expected for a 7 minute long video. i thought it was really good at covering the basics on losses, obviously it isnt going to be as in depth as a full research paper
It's One Of The Great Presentation I'm Gonna Add All These Info In my presentation 😃 on EL Machine loses
Thank you very much for your nice feedback and the support of my little channel
As always great video. Thanks for sharing.
Thank you for your nice comment 😀
I am electrical engineering student I'm very interested in electrical motor design, you videos are very informative , it would be great if you explained the slotless or coreless motor
Thank you for your feedback. Your idea is very good and I have put it on my task list. I've had so many client projects in the last few months that I haven't had time to make new videos. But I hope that I can still make 2 or 3 this year. Where are you studying, if I may ask?
@@Electric-Motor that would be great, I'm studding in Egypt Assiut university
@@Electric-Motor❤
excellent explanation
Thank you very much, I am glad to see that the videos help people a little bit.
Good guy OSWOS always ready to answer our questions ^^
Of course, I'm always happy to help.
That's a good video, in my opinion Can you go a little bit slower? For someone , like me, english is a secondary language, so it became a bit difficult understood at this velocity.
Thanks for your work, and for helping to understand this argument
That's a good point. The problem is that when I speak too slowly, people switch off faster. But I will try to speak more clearly and simply. What is your native language, if you don't mind me asking?
@@Electric-Motor is not a problem! my first lenguage is italian.
@@giorgioblabla9343 I like Italy, the weather is better there and also the food is better than in Germany. Thanks again for your feedback
Hi, thank you for the information in the video, I would like to know the losses of magnetic field what type of losses, and changing the medium between the stator and the rotor how it can affect the losses, or increasing the gap size between them if we can estimate how the efficiency will be affected.
Thank you
Especially with induction motors and reluctance motors, a large air gap leads to poor efficiency. However, the additional losses do not occur in the air gap but in the sheet metal or copper. In motors with permanent magnets, the air gap can be made larger without much influence on the efficiency. However, more or stronger magnets are needed. If the air gap is filled with water or oil, additional mechanical losses occur, which reduce the efficiency of the motor. Liquids can also contain electrically conductive material, in which case electromagnetic losses also occur. What exactly do you want to implement? You can also write me a message via my website.
Hallo Markus, deine Videos gefallen mir. Als ich entdeckte, dass du aus Berlin kommst, entschied ich mich gleich in die Kommentar etwas zu schreiben. I’m a 26-year-old young guy from China. I’m in the business of neodymium magnets and magnetic assemblies, but now trying to expand to BLDC motor and controller field. That’s why I’m learning everything about electric motors. You have German accent when speaking English, which I find interesting.
Danke für deine volle Videos!
That sounds interesting. Do you have your own company?
Great content, great visials. Just need improvement on the pronunciation. Subscribed
Thank you very much. I will try to improve the pronunciation.
it's a great presentation!
1-I hope you talk about motor winding ... like length, diameter size and number of turns of the wire and voltage/amper limits of motor winding
2-coreless (slot-less) motor ... is it become inefficient in large applications?
3- BLDC Golden motor ... how this small motor work in huge power?
Sorry for my late reply. Large slotless motors are not so bad. But a big problem is the heat dissipation that occurs in the windings. Therefore, a large motor without slots cannot deliver such high performance. The motors from golden Motor don't look bad, but my experience is that you have to adjust the control system to be able to use the full potential. What do you want to use the motor for?
@@Electric-Motor
thank you for replying♥️
but what about winding... I mean if you want to design a motor with specific amount of current and voltage. such as 200mA , 220V how you could know the length of the wire and the diameter.... I tried to use ohm law ... the resistance of 0.32mm AWG is 212 ohm per Km ... so for 220v I need 5Km of wire (3.6Kg) but motor with same power has less wire
To design a motor you need a software where you can enter the number of windings, motor dimensions and magnet material. The software then calculates the speed / torque characteristic. Such software tools are usually very expensive, because they are only used by a few people. My tip would be to get a motor that roughly meets your requirements and adapt it. So for example adapt the windings and the magnet material. Then you can better make your own calculations and check them. You haven't told me yet what you want to use the motor for? Maybe I have an idea where you can get one cheap.
@@Electric-Motor the motor is for a electric vehicle... but I'm trying to design a small prototype... I'm trying to use the work concept of universal motor and reluctance motor
That sounds interesting. But did I understand you correctly that you want to build a reluctance motor with brushes? And if so, what would be the advantage?
Great basics video! Thanks!
Wavoo... great Marcus
Thank you very much, i am very happy to read that you like it. Have a nice day
@@Electric-Motor Yes... Very Useful to me
@Mehandhi vino That makes me very happy :-) If you have any other questions, just write them in the comments. I help with pleasure 😊
A pop filter, curtains, and higher speech volume would help.
thx for the feeback
So, I live in Alaska and the mains electric isn't very reliable sometimes, so I use a generator sometimes... The generator I use used to work perfectly, but then I hooked up a power tool and it seemed to "break" the generator... I tested the output at the plug, and it is only producing 5 volts now, so I tried exciting the field windings with a car battery and only got about double the voltage... what else can I try? It just occurred to me it might have slip rings and if so, this is where i need to apply the voltage in order to figure out where the problem is coming from ?
Hi thanks for your question, however I probably can't really help you there. It will probably be a separately excited generator or? The excitation voltage for the rotor could be too low. If the motor has drawn too much current, the stator winding could also have a short circuit and therefore less voltage. Have you looked at the voltage from the generator with an oscilloscope? Please remember that high voltages and currents can be life dangerous.
Can you please comment if there is a considerable relation between Core looses and motor vibration.
If the electric motor produces noise, it comes from mechanical vibration. The energy which is consumed for the vibration counts of course to the losses. An efficient motor usually generates very little vibration. Do you think I should have added vibration as an additional type of mechanical loss?
What happen to next video you mentioned in the video?
@Techno I think I'll do a video on loss reduction methods next.
I'm working on 1.5kw BLDC Motor Design and prototyping. While testing the I'm facing lot of losses. Motor is running at its maximum rpm at 8 amps on 64 volts without any load. Would you please help to figure out how to calculate the exact gauge of winding wire, number of turns and number of strands.? And for Prototype I've used 2.5mm mild steel plates to make 50mm of stack. Should the plates be insulated to minimise the eddy current losses.?
Hi, I'm happy to help you but I need more information about your motor. The plates are definitely too thick, normally 0.35mm thick plates are used, but 0.5 millimeters will do. But it depends on the speed, how fast do you want the motor to turn? What do you want to use the motor for? And yes the sheets must be isolated from each other!
@@Electric-Motor Thank You for replying, I'm happy.
ruclips.net/video/z3jzvDN5E08/видео.html see the motor how it is looks like. This is 3d printed though, but later I replaced stator and rotor with mild steel. Yes, the plates are too thick and not insulated and also it mild steel plates, that's definitely the main reason of losses. Apart from that I have to calculate exact number of turns and strands.
I want to use the Motor for an E-Bike and for that I need the motor to run at 8000 to 10000 rpm and max Torque I'll need between 5 to 7 Nm.
No. of poles 8, no. of slots 12, stack length 50mm, stator bore 80mm, rotor OD 78mm, stator OD 130mm. Slot depth 18mm.
See the more pictures of my Motor.
www.linkedin.com/posts/jatan-patel-222a9615b_bldcmotor-3dprints-activity-6817878626604855297-ezXW
See an another video where I've replaced the plastic core material with mild steel. ruclips.net/video/qIa4YcR0R58/видео.html
I have added you on LinkedIn. Maybe we can support each other in promoting content on LinkedIn. If you have any questions, I'd be happy to help. What kind of position sensor do you use because that's often a big problem?
@@Electric-Motor it is hall effect sensor. A3144
how can we know the value of constants eddy current, hysteresis, and additional?
Many manufacturers provide the specifications for their electrical sheets. Otherwise, you have to measure the materials yourself. For example, with an Epstein frame.
On your next video on electrical sheet material will you focus just on SiFe or explore NiFe and CoFe too?
I tend to look at the topic in general and try to give as many people as possible an added value. But maybe I can be a little more detailed here and there and go into the materials you mentioned. But I will be able to cover the topic of electrical sheets only in the next but one video. What field do you work in, if you don't mind me asking?
Please talk about clearpath servo motor think its a spmsm bout the software used is magnefesent i would realy be Thankfull if you talk about
Very good idea! The video about servo motors with SPMSM is already in preparation. But it will take 2 months until I can make it ready. Thanks for your comment it helps a lot to get more views
@@Electric-Motor thank you so much cant wait for it and again thank you for the informative videos
Please I need your help agently am trying to run three ac motor of 5.5hp on single phase source of electricity but if am trying to run all the three motor usually one of them will have a problem with the starting winding (burnt) what could be the problem
I don't think this is possible without additional electronics, sorry to say that
can you please clarify how these losses effect the air gap between stator and rotor
I'm not sure I understood your question. Do you want to know what influence the size of the air gap has on the losses?
Very interesting material for learning motor design. I am working using motorcad for electromagentic motor degisn, do you have any guide or book about the design flow, design process and recomendations for this software?
How can i calculate the number of copper strands to be taken when i want to wind the new motor??? and on what parameters are they dependent on??
hi I have electric motor ran on 220v can I make it work on 48v thanks
Of course, it depends on the motor type. But in general, you can rewind the stator to a lower voltage, for example 48V. In simple terms, fewer turns with a thicker wire for a lower voltage.
@@Electric-Motor do I have any video to see how it make
@@user-rq6wr4fg4x No, not at the moment. What type of motor is it?
@@Electric-Motor it is 220ac motor I want to do it 48v DC its can do
@@Electric-Motor there is a email address I can sand you picture
So then ,wouldn't a motor made of vanadium dioxside, alloy would be a great choice for cooling. That it reduce heat losses.
also if the motor didn't have metal bearings. but instead had electromagnet bearings with very tight tolerances That would suspend the motor shaft when switched on then as the Rpms increased the voltage/current also increased on the bearings to m further stabilize the spinning motor and have no friction losses
Is there a good book on electric generator design? I'm looking at making a wind generator. I want it to work well with lower wind speeds of around 15 mph.
I've seen a lot of videos about the subject but many of them are contradictory and I was wondering if there is a good reference book for this sort of thing.
I need to know what shape everything is supposed to be... windings, magnets, cores, etc.
I need to know what quantity of components is optimal. Six coils or nine or twelve?
What gauge of wire to use.
How many windings should be in each coil.
Obviously these are a lot of questions. But every time I go looking for a reference book about this I get lost. Is there a good book that will answer my questions so I can design this thing?
Thank you for your time.
Hello a good book I can not recommend you unfortunately. Most of them are written by professors and have no direct reference to practice. That's why I also make the videos so that you understand without much prior knowledge erverything. Whether you design an motor or generator is actually very similar and on the subject of motor design you will find more information. To get you started, I would recommend buying a cheap motor and adjusting the winding to your speed and voltage. This will not give you a perfect result but you will get a first result quickly. What power and voltage should your generator / motor have?
@@Electric-Motor It will be a 10ft diameter blade which at 15 mph and at 30% efficiency would have 1500 watts. Keep in mind, wind speed varies so at 5 mph it would produce about 200 watts at the same efficiency. Voltage can be stepped up or down. Something above 52 volts and less than 72 volts is preferred.
Speeds above 20mph could be dangerous and the system would stop the blade from turning in higher wind speeds. And I would make a point of securing the system in intense weather.
What I'm mostly interested in is getting the highest possible efficiency in low wind conditions. So 5 and 7 mph which is about a range of 200 to 550 watts. That would be normal operating conditions.
Given that the generator will likely be a three phase AC system, internal use will need to be DC, and DC voltage will need to be kept at usable ranges... I will have to use an AC to DC rectifier... the quality of the DC output at that stage is not important as the voltage will just be for batteries. And a DC to DC voltage converter will have to be used to increase or decrease the generator's voltage to something compatible with my power system.
Again, most desirable feature is high power efficiency at low wind speeds.
The value of this will be providing enough power at night to keep always on systems powered so they don't drain the battery at night.
Thank you for your time.
I would also suggest given the nature of your channel, this might be something other people are interested in learning about given the trouble with energy in the world right now. For my own purposes, my boat will be off grid regardless. But For other people perhaps simple small generators that capture energy at their homes might be something people find interesting.
You know more about this subject than most people that talk about it on youtube. In depth explanation of the pros and cons of different designs for different generation conditions would be very interesting.
@@diogenes848 Sorry for my late message. It is quite expensive to build a generator for your wind turbine. I am a sailor myself, so my question is why don't you just buy a wind turbine? What problem do you have with the current solutions on the market?
@@Electric-Motor I'm interested in learning new things. I wanted to understand the principles so that I could at the very least design what I want on paper. Even if I don't make it being able to represent the principles on paper accounting for all the issues is interesting to me.
I've been looking around... I think there is a book by Hugh Piggott that might help me.
In addition to the wind turbine I'll also be building a hydrogenerator as well so that I can generate power whilst under sail.
Each generator has different rates of rotation and torque on the blades... and configuring the motor properly increases efficiency. Without more information, I'll have to either do more research which is fine or experiment which could be expensive as there will be failures.
I'm reaching out to people on the internet to avoid making these mistakes.
is it possible that mankind can make a perfect motor? an induction motor without any issue?
Thank you for your question. A perfect motor would have one hundred percent efficiency and no mass. So nothing is impossible but it will take maybe one or two centuries until we are ready ;-) but we are working on it.
@@Electric-Motor what do you think if a power generator will be the one who provide power for the elec motor then step up the electricity like a transformer so the requirement of the motor will meet, is it possible?
@@lopnajhardcoremetal7686 If I have understood you correctly, you want to generate electricity with a generator and the generator is to be driven with a motor that is fed with the electricity from the generator, have I understood you correctly?
@@Electric-Motor wait, example like tesla. Battery>inverter>electric motor.
Right?
This one is like this.
Electric motor>generator>step up transformer> electric motor with deffirential.
Love your content, but your extreme arm movements are very distracting.
Sorry that I make so many hand movements. People then watch the video longer. But I will try that the hand movements have more relation to the content. Thanks for your feedback and have a nice weekend
What kind a genarator use for best efficiency?
Depends on the power of the generator. In the megawatt range, separately excited synchronous motors make sense. For small wind turbines PMSM are more suitable. For what application and what power exactly are you looking for a generator?
@@Electric-Motormini low rpm brushless genarator enough to power 15w fan
@@happyatheists9361 Of course I don't know all your requirements, but I would probably use a BLDC motor with external magnets for high efficiency. Are you developing a product or just doing a DIY project?
@@Electric-Motor just a DIY Project my man!
@@happyatheists9361 The most successful projects always start as DIY projects. Wish you much fun and success
@OSWOS I have a question
there is a video of BLCD motor ..
ruclips.net/video/SQvZ-FLwFX0/видео.html
the rotation speed of the motor increases when stator left out the rotor.... why this happens?
hope you do a short video about it ..
Thank you Sir
Thanks for your great question, this is an interesting video! When the stator is pulled out of the rotor, the back EMF decreases. The back EMF is the voltage that the motor generates when it is turned quickly by hand, for example. The faster you turn the higher the voltage you can measure. If the voltage is too high, the phase current will decrease and the motor will no longer speed up. You can lower the voltage of the back EMF by using less powerful magnets and thus increase the speed. This is exactly what happens in the video, by pulling out the stator, the back EMF is lowered and the speed can be increased. If the stator were not pushed back, it would require a higher phase current at a lower speed because the back EMF has dropped. Please give me a feedback if you have understood this?
@@Electric-Motor Now I got it!! this answer led me to several questions ... Now I know why the motor has a small amount of wires, because it depends not only on the resistance of the wire, but also on the “~resistance” generated by the reverse voltage of back EMF .... am I right?
Sorry for late reply I spent the whole day trying to understand
Thank you so much, you are a wonderful entity 💎
@@ahmedshfra9746 Thank you for your compliment. Exactly the voltage of the back EMF prevents the current in the windings from increasing. If the voltage of the back EMF becomes too high, the motor can no longer speed up. Thanks again for your question and I wish you a high efficiency.
this is all the stuff i was reading in textbooks back when i was ten or so. all very basic and simple.
i cant stand watching someone simply TALKING, and waving tehir hands around. wheres some practical demonstartions? like, hey, heres three coils of different gauges, same turns, same ampere turns... lets see which one heats up fastest... thats your ohmic losses.
heres some iron, lets give it a taste of varying frequencies... theres your core loss, theres a BH loop, the hysteresis loss...
or, iunno. heres a coil. on a core. with an adjustable gap. look at how we can vary the current and ohmic losses of the coil by varying the gap! see how it changes on teh scope in relation to the gap and the reluctance of the magnetic circuit?
hey look, heres a welding transformer. see how the core moves, and alters the coupling, the current, when we have a fixed input supply and a fixed output load? its all related...
now we have nice practical demonstrations of various principles, and we can walk away feeling we actually learnt something tangible, useful.
oh. wait. we didnt use a scope. instead we had some guy stand there talking and waving his arms around. who wants practical when you can have theory and only just scratch the surface?
if i didnt alredy know all this, it would be in one ear and out the other.
as it is, the whole video was rather pointless.
to me, this is sort of like watching an educational film targeted towards 8 year olds.
dont know what you expected for a 7 minute long video. i thought it was really good at covering the basics on losses, obviously it isnt going to be as in depth as a full research paper