EDIT: Please note that the "alternator" used in automobiles/vehicles are indeed AC generators. Until 1960, dynamos or DC generator were used but after that with the advancement in Electronics and Silicon semiconductor devices, alternators came into fashion with rectifier unit. This is because DC generators use commutators which convert internally generated AC to DC and are expensive and inefficient. Alternators are small have low weight and are easy to use for DC purpose with a rectifier in vehicles. Thanks.
Thank you Sir , Your American English speaking is in tune. To my American southern Ears. Thank you for passing along your knowledge. Gob bless you and your loved ones.
Les Hulsey Thank you. I am trying to correctly tune my accent for everyone so that nobody finds it tough to follow. Thanks once again and god bless you as well.
These are two semi-vague terms that can't be differentiated specifically. A generator is literally anything that converts mechanical power to electrical power. Usually you're talking about an industrial generator, it usually refers to a portable generator. "Alternator" may refer to any mechanical generator that outputs AC, but it usually refers to automotive alternators. DC generators are the "generators" you talk about here, and are pretty much 100% obsolete in favor of 3 phase alternators hooked up to rectifiers. There are also the single-phase or three-phase generator heads that are seen in anything from portable generators all the way to nuclear power plants, and are basically large automotive alternators that are usually excited with a smaller, diode rectified permanent magnet generator, rather than a battery source.
You have missed a important point alternator is specifically used in power generation station to keep the frequency constant 50 /60 hz, and also the DC current is applied on the rotor as per the load requirement.. Therby controlling the power produced.. Correct me if I am wrong...
Not specifically but mostly. Alternator is used everywhere like in cars or normal alternators used as backup power in case of power outage. What you are saying is how alternator works (exciting the rotor by DC supply) which I have addressed by showing where the field and the armature coils are located for a particular machine (generator and alternator).
@@NEWNATURE777 A DC current is all what is required to excite the rotor. Now-a-days brushless static excitation is done in which a rectifier unit is mounted on the rotor shaft itself. The AC output from the alternator is fedback to the rectifier mounted on the rotor and the output from the rectifier is connected directly to the rotor windings. Permanent magnet generators can also be used by coupling its shaft to the alternator's rotor and thus connecting the output of the generator to rotor winding with brush. But brushless excitation is more efficient as there is no contact loss/spark and no wear and tearing of contact point. That's why static excitation is more preferred.
I have noticed on some newer cars (such as the Ford Escape), their repair manuals describe their charging device to be a generator rather than an alternator. When you look at their 'generator' it looks very similar to a standard alternator. Are they using the term more broadly, or has the fundamental design changed to have a stationary magnetic field in the stator?
Not for a DC generator because its already DC voltage. But DC generators are not used now in general except in few applications. Rectifier is necessary where you need DC output voltage from an alternator.
Excellent explanation sir, I have a doubt Can we use shunt generator to charge the lithium ion battery of an electric vehicle while the vehicle is in motion I am mechanical engineering student but I have interest on electric vehicle range extender related projects Thank you sir
Yes you can but why using a shunt generator? Also battery power will be required to give power to the motor. So, it's not going to charge the battery although it can reduce the required supply current due to back emf. Hi
Some golf carts use a generator to power the wheels and also starts the gasoline engine. The centrifugal clutch uses a rubber belt to a gear box, the gear box connects to the rear axle with a drive shaft. But if you look at 2 stroke Polaris 4 wheelers, they use a cogged rubber belt.
i have an idea...... I have no way to put it on paper nor the schooling to tell you how to build it, i CAN show you... its a different way to power a vehicle of ANY size or mass... can you help?
Joseph A induction motor is what used for generation of electricity from windmill. Induction Motor rotor when made to run at super-synchronous speed (i.e, speed greater than Synchronous Speed), it cuts the synchronously rotating magnetic field and hence generates electricity. This is how windmill generates electricity. So basically both windmill generator and induction motor is same but difference is one works at super-synchronous speed while other at sub-synchronous speed.
Values differ from machine to machine. Any well designed machine will give you 95-98% efficiency. But the factor is the cost and maintenance which us high in case of DC generator as compared to that of an alternator of same power capacity. That's why you won't see DC generator in use generally anywhere. If DC current required, Alternator output is fed to a rectifier.
Yes but not directly. If you are using Li-ion battery then you need a power regulator module to control the charging otherwise your batteries would be left damaged.
Generator is a broad term. An alternator is a generator, a dynamo is a generator, regardless whether the output is AC or DC. If you are using an alternator for automobiles then the output of this generator is DC, but if you a using generator to supply your house then the output is AC.
That's why I said it is not wrong to call a machine by either name. However the differences pointed out here are between certain design related things in a general Electrical machine, generator/alternator.
To all commentators...YES, An ALTERNATOR or GENERATOR can produce electrical energy by ROTATING or ROLLING in BOTH directions. LEFT or RIGHT. It makes NO DIFFERENCE.
some late information it appears that the efficiency of a generator/dynamo was low, and the output was DC, because slip-ring/continuous-contact commutation was not utilized.! d
Yes you're right. Efficiency and capability of a DC machine is limited as there is no physical isolation between the stationary and the rotating parts. This problem led to the invention of AC machines.
@@TellAStoryofficial00 It can be but as you know permanent magnets lose their magnetic property over time thus field excitation is a good way. Also by just controlling the field current we can vary the active/reactive power from the alternator which is important. For a permanent magnet that's not possible.
Alternators aren't used only in cars. What I meant was that if DC voltage is required then one can take the output from the alternator and convert it to DC using a rectifier-filter unit. Hence no need of lossy and bulky DC machines.
@@ervivekchoubey If an alternator is strictly AC, then why is a car's generator that charges its batteries (obviously requiring DC) called an alternator?
@@carultch- Because it is in fact, an alternator, which produces AC but is then fed to a three phase full wave rectifier. This changes the AC to the DC required to charge the vehicle battery and power the electrical system.
Power factor is basically the ratio between Active Power to Apparent power of an AC device or simply put, it is the amount of total power in the circuit being used actually by the machine to do some work. Like an AC motor of 220V and 5A has total power or capacity of 220*5=1100VA if fully loaded. But, when measured using a wattmeter, you will find that it is using some less power than that, say 1000W only. Thus power factor =1000/1100=10/11=0.99. This 1000W is active or real power represented by VIcosφ while 1100VA is the apparent power represented by VI. So, the power factor is VIcosφ/VI = cosφ. Actually, it happens due to nature of load. AC motor for example is an induction machine. By Lenz's law we know that any time varying current passing through a coil or inductor is opposed by the counter magnetic flux generated by the coil. Thus the amount of useful power reduces and only a part of that power does real work while another part is used in generating magnetic field flux. This is the magnetic field flux generated between the stator and the rotor in a machine which is sine of the total or apparent power that is VIsinφ (called reactive power) while cosine component is the actual measurable power that the machine uses that is VIcosφ. That's why we calculate power factor to understand what part of power is actually being used by the machine out of the total power. If power factor that is cosφ is poor then for same voltage and same power demand, the machine will draw huge current and may burn out or affect other loads in the line. Thus it should be as close to unity as possible. Here's a video I made on measuring reactive power using Wattmeter - ruclips.net/video/Z8We1ytQgOM/видео.html I may make a video on the topic in the future as it's a broader concept. I didn't get your second question regarding motor. Can you elaborate. Thanks
@@ervivekchoubey Great. Now my question is, the power grid comes with voltage and current in phase. So PF 1. Then eventually PF will change according to the load. My issue is that this time my source isna GenSet having already its PF 0.8. So my question is: how comes a source has a PF? Also, how can I correct the PF of my GenSet so that I can maximise it VA usage? If my Genset is 2500 MVA / 2000 MW means that PF is 0.8. Can I improve PF so that I can improve 2000 MW to 2200 MW ?
Who said that source has now pf? Source or generator has power factor and it's not unity. That is because of the generator circuit. Generator itself us an inductive component and has two components of reactants which make the synchronous reactance. There isn't much you can do about the generator but the load can be put as to utilise the max active power by Static VAR compensation techniques or by using an over-excited synchronous motor.
0786RICARDO In a way you can say that because generators are bigger in size and have thus a speed limitation also because of armature reaction (talking about DC generators). Alternators are basically of two types 1. Salient pole alternator 2. Cylindrical Rotor alternator According to design, salient pole alternators are limited upto certain speed because the poles are like inside out carrying windings and hence rotating them at high speed will cause tearing of the windings under centripetal force. Whereas cylindrical rotors are used where the primemover is of high speed like coal based thermal power plants. Salient pole alternators are used in hydal power plants where the thrust applied is low but output is nominal.
His question is...Can we use a dc generator or as you said induction motor for supplying power to lift. I guess the answer should be to use "Slip Ring Induction motor or wound rotor motor which have high starting torque and used for variable speeds applications."
It is wrong to say that in a Generator the field is stationary. All AC machines (synchronous and asynchronous generators) have rotating magnetic fields! There is a technique where the coordinate system rotates with the rotor (Direct and Quadrature), by such analysis the currents can be modeled as constant in the rotating coordinate system so that the control of such machines is accomplished more easily. Alternators are usually related to Claw-Pole Generators to which I was looking more information about, but the video was not helpful at all.
I am sorry if the video wasn't helpful to you. However the basic theory says that either the field should be rotating or the armature conductor. In a generator or specifically a DC generator has field stationary while it is the armature that rotates and as armature carries conductor therefore there is a speed limitation on a DC generator due to centripetal force. Another thing is that there are brushes on a DC generator with commutator which causes speed of the DC generator to be lowered further because of sparking. The other type of machine that we have therefore is an alternator where the magnetic field rotates while the 3 phase armature conductor remains stationary. No brush required and thus the speed of an alternator is high and thus the generated terminal voltage is high. That's why the basic difference between generator and alternator is based on what rotates and what remains stationary.
Good knowledge . 2 splits ring connect shaft 2 carbon sets . Splits ring contact crossing punge + - or - + one brush connected Dc second brush out connected tranceformar primary transformer secondary shaft rotation from transformer out AC? I am asked question but my english bad than more question
Thanks @David. Yes both of them can be said to be the same. Any generator produces AC current. Although Dynamo has commutator which converts the same into DC, magneto as per definition has no commutator to convert AC to DC. So, that's the slightest difference between them. All of them fall in the category of generator.
A generator is a mechanical device which produces electrical power...Ac or Dc... An alternator is a similar device which produces Ac power only... A device which produces mechanically electrical power in Dc form is called a Dynamo..
Alternators used in automobiles/vehicles are indeed AC generators. Until 1960, dynamos or DC generator were used but after that with the advancement in Electronics and Silicon semiconductor devices, alternators came into fashion with rectifier unit.
@@ervivekchoubey Ok thank you for clarifying. So it has to do with what format of power the rotating parts originally produce, even if power-electronics like a rectifier reformat it at a later stage.
Yes, original emf generated by any machine is AC. In DC generators we have commutators that do the rectification work. But with power electronic converters the rectification is easier and efficient without much wastage of power.
Chelford Quider an alternator is more economical due to its liw weight, Higher kW capacity. No brushes, no commutators and smooth operation. And if you need DC, you can take the alternator output and fed it to rectifier bridge. The total setup is mire economical than a generator.
If someone could help me I will be very grateful, is there another type of machine that converts mechanical energy to electrical energy that does not involve magnets... If you know the answer please help!
Hi sr thanks for your great video. In terms differences wich one would be more efficient if you were planning a system for providing Ac electricity to a house off grid with or whithout a battery bank, a generator or an alternator?, taking into consideration that in the case of wind, rotating speeds will vary significantly
If you are talking about wind-generated power then definitely an AC generator or more specifically, an induction generator. Induction motor when made to run higher than the synchronous speed, it begins the generation of electricity and hence called induction generator. Finally, the output of the generator is fed to a converter circuit (rectifier) and stored in a battery. To control the variation of speed, Ball-bearing must be connected to the windmill rotor as well as a speed controlling circuit must be there along with a gearbox to maintain a constant speed. You can learn about the windmill system on Google/RUclips.
In an Alternator, the Magnetic Field is NOT moving at all, in a Generator the Magnetic Field is rotating (Single Phase or Three Phase)... Your drawings are not accurate for either machines, although your first as Thumbnail image is correct.
In a Typical Alternator the Magnetic Field run parallel to its shaft, and magnetic poles are re-routed/redirected through the steel claws in a NSNSNS configuration...but, no matter how fast shaft goes...North and South will always be on the same side of shaft. You are welcome
**THERE IS NO FREE ENERGY!** You can't have a free electric generator no matter what you do. However there is a small generator that you can make which can turn fan air into electricity to lit small LEDs. Just search for a video titled "Turn an electric motor into generator" on my channel.
Sometimes the old fashioned way of doing things is better; instead of trying to draw using the computer screen, a blackboard and chalk would have been easier and faster.
True. But alternator is a section of generator which generates alternating current. That's why in the beginning of the video I said that it's not incorrect to call alternator as generator, both are same.
I'm sorry for the bad experience you had. This was a video when I started my channel and was testing a number of videos. I am improving the quality. I am not a native English speaker hence was finding it a but difficult back then. Sorry for the inconvenience.
EDIT: Please note that the "alternator" used in automobiles/vehicles are indeed AC generators. Until 1960, dynamos or DC generator were used but after that with the advancement in Electronics and Silicon semiconductor devices, alternators came into fashion with rectifier unit. This is because DC generators use commutators which convert internally generated AC to DC and are expensive and inefficient. Alternators are small have low weight and are easy to use for DC purpose with a rectifier in vehicles.
Thanks.
Automobile alternator is basically a alternator. The alternating current is converted to direct current via a rectifier.
@@mazeofworld5155 Thank you for rectifying. I researched a bit and found it to be true.
Thank you.
Next time explain for week because some disturbence for dreawing.... Kk
U can by a power inverter and easily run DC on an alternator.. it's 35 usd at walmart!
Thank you Sir ,
Your American English speaking is in tune. To my American southern
Ears. Thank you for passing along your knowledge. Gob bless you and your loved ones.
Les Hulsey Thank you. I am trying to correctly tune my accent for everyone so that nobody finds it tough to follow. Thanks once again and god bless you as well.
These are two semi-vague terms that can't be differentiated specifically.
A generator is literally anything that converts mechanical power to electrical power.
Usually you're talking about an industrial generator, it usually refers to a portable generator.
"Alternator" may refer to any mechanical generator that outputs AC, but it usually refers to automotive alternators.
DC generators are the "generators" you talk about here, and are pretty much 100% obsolete in favor of 3 phase alternators hooked up to rectifiers.
There are also the single-phase or three-phase generator heads that are seen in anything from portable generators all the way to nuclear power plants, and are basically large automotive alternators that are usually excited with a smaller, diode rectified permanent magnet generator, rather than a battery source.
polymetric Agreed. The difference can be done on fewer points only.
What I can say now I'm so happy to watch this video and very interested to learn more about it thank you so much 🤝
You’re very smart Vivek
Thank you, this helps explain the difference between Generators and Alternators a lot! :)
Glad to know that 🙂
You have missed a important point alternator is specifically used in power generation station to keep the frequency constant 50 /60 hz, and also the DC current is applied on the rotor as per the load requirement.. Therby controlling the power produced.. Correct me if I am wrong...
Not specifically but mostly. Alternator is used everywhere like in cars or normal alternators used as backup power in case of power outage. What you are saying is how alternator works (exciting the rotor by DC supply) which I have addressed by showing where the field and the armature coils are located for a particular machine (generator and alternator).
Many thanks my friend! So much help to me, and it is so obvious you are keen to help us. You and your family stay healthy in these days!
Thank you so much. I wish you all the best.
Thanks a lot very nicely explained video
Thank you so much for giving the good explanation 👍..it is really helpful ❣️... good job sir... bless your heart 💜
Superb sir, Very good explanation👌
Thank you :)
Amazing computer graphics.
Thank you very much.
Can you exite an alternator using permanent magnet generator? Rather than a battery source?
Yes of course it can be done.
Can you briefly explain it, I'll appreciate, thanks
@@NEWNATURE777 A DC current is all what is required to excite the rotor. Now-a-days brushless static excitation is done in which a rectifier unit is mounted on the rotor shaft itself. The AC output from the alternator is fedback to the rectifier mounted on the rotor and the output from the rectifier is connected directly to the rotor windings.
Permanent magnet generators can also be used by coupling its shaft to the alternator's rotor and thus connecting the output of the generator to rotor winding with brush. But brushless excitation is more efficient as there is no contact loss/spark and no wear and tearing of contact point. That's why static excitation is more preferred.
@@ervivekchoubey thank very much Choubey, I'm working on ebike using an old alternator, didn't want to use battery to excite it.
@@NEWNATURE777 anytime :)
Nice explanation.
Thank you
Great video, thank you
I have noticed on some newer cars (such as the Ford Escape), their repair manuals describe their charging device to be a generator rather than an alternator. When you look at their 'generator' it looks very similar to a standard alternator. Are they using the term more broadly, or has the fundamental design changed to have a stationary magnetic field in the stator?
Edit: please read the pinned comment.
spelunkerd
Very well explained☑️
Glad you liked it
When using a generator is it necessary to have a rectifier?
Not for a DC generator because its already DC voltage. But DC generators are not used now in general except in few applications. Rectifier is necessary where you need DC output voltage from an alternator.
Excellent explanation sir, I have a doubt
Can we use shunt generator to charge the lithium ion battery of an electric vehicle while the vehicle is in motion
I am mechanical engineering student but I have interest on electric vehicle range extender related projects
Thank you sir
Yes you can but why using a shunt generator? Also battery power will be required to give power to the motor. So, it's not going to charge the battery although it can reduce the required supply current due to back emf.
Hi
Some golf carts use a generator to power the wheels and also starts the gasoline engine. The centrifugal clutch uses a rubber belt to a gear box, the gear box connects to the rear axle with a drive shaft. But if you look at 2 stroke Polaris 4 wheelers, they use a cogged rubber belt.
Incredible explanation Mr. Engineer
Good explanation ,Thanks Engineer
ABOOTHAHIR U Anytime :)
i have an idea...... I have no way to put it on paper nor the schooling to tell you how to build it, i CAN show you... its a different way to power a vehicle of ANY size or mass... can you help?
Sounds good. You can put here a brief idea of what you want to say. And how can I help you?
what is the different between windmill generator and induction motor
Joseph A induction motor is what used for generation of electricity from windmill. Induction Motor rotor when made to run at super-synchronous speed (i.e, speed greater than Synchronous Speed), it cuts the synchronously rotating magnetic field and hence generates electricity. This is how windmill generates electricity.
So basically both windmill generator and induction motor is same but difference is one works at super-synchronous speed while other at sub-synchronous speed.
I was looking for dc generator efficiency values vs ac alternator value. Not found
Values differ from machine to machine. Any well designed machine will give you 95-98% efficiency. But the factor is the cost and maintenance which us high in case of DC generator as compared to that of an alternator of same power capacity. That's why you won't see DC generator in use generally anywhere. If DC current required, Alternator output is fed to a rectifier.
@@ervivekchoubey if efficiency is almost same and i don't care for capital cost then can i use dc generator to charge my battries?
Yes but not directly. If you are using Li-ion battery then you need a power regulator module to control the charging otherwise your batteries would be left damaged.
@@ervivekchoubey noted and thanks
nice and easy to understand
sujeet kumar Thank you, please share and Subscribe :)
Good and short explanation 👍
Generator is a broad term. An alternator is a generator, a dynamo is a generator, regardless whether the output is AC or DC. If you are using an alternator for automobiles then the output of this generator is DC, but if you a using generator to supply your house then the output is AC.
That's why I said it is not wrong to call a machine by either name. However the differences pointed out here are between certain design related things in a general Electrical machine, generator/alternator.
good explanation!!! fellow engineer!
op a Thanks please share and subscribe :)
To all commentators...YES, An ALTERNATOR or GENERATOR can produce electrical energy by ROTATING or ROLLING in BOTH directions. LEFT or RIGHT. It makes NO DIFFERENCE.
Victor Miranda but the emf polarity changes for a DC generator
some late information it appears that the efficiency of a generator/dynamo was low, and the output was DC, because slip-ring/continuous-contact commutation was not utilized.! d
Yes you're right. Efficiency and capability of a DC machine is limited as there is no physical isolation between the stationary and the rotating parts. This problem led to the invention of AC machines.
Can the field rotation in an alternator be a magnet?
Sorry I didn't get you. Please elaborate your query.
I mean can the rotor of an alternator be a magnet like neodymium magnet? Then the stator be of winding coils
@@TellAStoryofficial00 It can be but as you know permanent magnets lose their magnetic property over time thus field excitation is a good way.
Also by just controlling the field current we can vary the active/reactive power from the alternator which is important. For a permanent magnet that's not possible.
@@TellAStoryofficial00 The magnet is an electromagnet. It receives voltage from the car battery to make the magnet that rotates. In an Alternator.
Rectifier in the Alternator changes AC to DC?
No magnet in the alternator. The rotor receives voltage from the CAR BATTERY to create an Electromagnet.
Alternators aren't used only in cars. What I meant was that if DC voltage is required then one can take the output from the alternator and convert it to DC using a rectifier-filter unit. Hence no need of lossy and bulky DC machines.
So the generator is two phase DC or AC and the alternator is three phase AC only?
It's just one there is no phase in DC. Secondly, yes but alternator is also called generator but alternator is strictly for AC generator
Ok seems i need to study more. Lol. Thank you.
@@ervivekchoubey If an alternator is strictly AC, then why is a car's generator that charges its batteries (obviously requiring DC) called an alternator?
@@carultch- Because it is in fact, an alternator, which produces AC but is then fed to a three phase full wave rectifier. This changes the AC to the DC required to charge the vehicle battery and power the electrical system.
@carultch Sorry for the late reply. You can check the pinned comment on this video.
Thanks for your videos. Can you please explain the concept of power factor in generator? Can it that be corrected as it was a motor? Thank you
Power factor is basically the ratio between Active Power to Apparent power of an AC device or simply put, it is the amount of total power in the circuit being used actually by the machine to do some work. Like an AC motor of 220V and 5A has total power or capacity of 220*5=1100VA if fully loaded. But, when measured using a wattmeter, you will find that it is using some less power than that, say 1000W only. Thus power factor =1000/1100=10/11=0.99. This 1000W is active or real power represented by VIcosφ while 1100VA is the apparent power represented by VI. So, the power factor is VIcosφ/VI = cosφ.
Actually, it happens due to nature of load. AC motor for example is an induction machine. By Lenz's law we know that any time varying current passing through a coil or inductor is opposed by the counter magnetic flux generated by the coil. Thus the amount of useful power reduces and only a part of that power does real work while another part is used in generating magnetic field flux. This is the magnetic field flux generated between the stator and the rotor in a machine which is sine of the total or apparent power that is VIsinφ (called reactive power) while cosine component is the actual measurable power that the machine uses that is VIcosφ. That's why we calculate power factor to understand what part of power is actually being used by the machine out of the total power. If power factor that is cosφ is poor then for same voltage and same power demand, the machine will draw huge current and may burn out or affect other loads in the line. Thus it should be as close to unity as possible.
Here's a video I made on measuring reactive power using Wattmeter - ruclips.net/video/Z8We1ytQgOM/видео.html
I may make a video on the topic in the future as it's a broader concept. I didn't get your second question regarding motor. Can you elaborate. Thanks
@@ervivekchoubey
Great. Now my question is, the power grid comes with voltage and current in phase. So PF 1. Then eventually PF will change according to the load. My issue is that this time my source isna GenSet having already its PF 0.8. So my question is: how comes a source has a PF? Also, how can I correct the PF of my GenSet so that I can maximise it VA usage? If my Genset is 2500 MVA / 2000 MW means that PF is 0.8. Can I improve PF so that I can improve 2000 MW to 2200 MW ?
Who said that source has now pf? Source or generator has power factor and it's not unity. That is because of the generator circuit. Generator itself us an inductive component and has two components of reactants which make the synchronous reactance.
There isn't much you can do about the generator but the load can be put as to utilise the max active power by Static VAR compensation techniques or by using an over-excited synchronous motor.
good explanation but most generators that folks have experience with such as small portable generators have the field winding on the rotor.
The output is AC. But it is said generator loosely.The terms are used interchangeably at various places.
Good one
Is alternator better for high rpm?
0786RICARDO In a way you can say that because generators are bigger in size and have thus a speed limitation also because of armature reaction (talking about DC generators). Alternators are basically of two types
1. Salient pole alternator
2. Cylindrical Rotor alternator
According to design, salient pole alternators are limited upto certain speed because the poles are like inside out carrying windings and hence rotating them at high speed will cause tearing of the windings under centripetal force. Whereas cylindrical rotors are used where the primemover is of high speed like coal based thermal power plants. Salient pole alternators are used in hydal power plants where the thrust applied is low but output is nominal.
It should be better to have a single coil.wraped around iron spinning fast than many coils, right?
0786RICARDO how can you work with single coil? There are 3 phases and it is the rotor which carries a single DC winding.
Single coil feeding the electromagnet
Good work am like your explanation thank you my question is can alternator or generator work if he is rolling lift or right?
yekeen adekunle Can you elaborate a bit. I was unable to understand your question.
His question is...Can we use a dc generator or as you said induction motor for supplying power to lift. I guess the answer should be to use "Slip Ring Induction motor or wound rotor motor which have high starting torque and used for variable speeds applications."
It is wrong to say that in a Generator the field is stationary. All AC machines (synchronous and asynchronous generators) have rotating magnetic fields! There is a technique where the coordinate system rotates with the rotor (Direct and Quadrature), by such analysis the currents can be modeled as constant in the rotating coordinate system so that the control of such machines is accomplished more easily.
Alternators are usually related to Claw-Pole Generators to which I was looking more information about, but the video was not helpful at all.
I am sorry if the video wasn't helpful to you. However the basic theory says that either the field should be rotating or the armature conductor. In a generator or specifically a DC generator has field stationary while it is the armature that rotates and as armature carries conductor therefore there is a speed limitation on a DC generator due to centripetal force. Another thing is that there are brushes on a DC generator with commutator which causes speed of the DC generator to be lowered further because of sparking.
The other type of machine that we have therefore is an alternator where the magnetic field rotates while the 3 phase armature conductor remains stationary. No brush required and thus the speed of an alternator is high and thus the generated terminal voltage is high.
That's why the basic difference between generator and alternator is based on what rotates and what remains stationary.
Excellent
Nice video..
Thank you
Good knowledge . 2 splits ring connect shaft 2 carbon sets . Splits ring contact crossing punge + - or - + one brush connected Dc second brush out connected tranceformar primary transformer secondary shaft rotation from transformer out AC? I am asked question but my english bad than more question
You can ask in Hindi if you know.
Why wind mill use dc generator and not the ac alternator ?
Windmill uses induction generator which is basically an induction motor rotating at super-synchronous speed. It doesn't use dc Generator.
Great theory explanation.!
Ty.
Thank you.
ruclips.net/video/ggslJTb-U7c/видео.html
A generator and magneto is the same thing, right?
I don't know something by the name 'magneto'. Do you mean Dynamo, then yes.
@@ervivekchoubey look up “magneto” on Wikipedia. It’s somewhat similar to a dynamo.
en.wikipedia.org/wiki/Magneto?wprov=sfti1
Thanks @David. Yes both of them can be said to be the same. Any generator produces AC current. Although Dynamo has commutator which converts the same into DC, magneto as per definition has no commutator to convert AC to DC. So, that's the slightest difference between them. All of them fall in the category of generator.
A generator is a mechanical device which produces electrical power...Ac or Dc... An alternator is a similar device which produces Ac power only... A device which produces mechanically electrical power in Dc form is called a Dynamo..
Why then is a car's generator that obviously has to produce DC to charge a battery, still called an alternator?
Alternators used in automobiles/vehicles are indeed AC generators. Until 1960, dynamos or DC generator were used but after that with the advancement in Electronics and Silicon semiconductor devices, alternators came into fashion with rectifier unit.
@@ervivekchoubey Ok thank you for clarifying. So it has to do with what format of power the rotating parts originally produce, even if power-electronics like a rectifier reformat it at a later stage.
Yes, original emf generated by any machine is AC. In DC generators we have commutators that do the rectification work. But with power electronic converters the rectification is easier and efficient without much wastage of power.
Sir how to connect u please tell me
You can reach out to me on E-mail
What am trying to ask is that, if am use a motor to roll anyone of the 2, can it work if he roll either left or right
yekeen adekunle No. There is a specific direction you need to rotate the rotor/armature. It is based on Fleming Hand rule or cork screw rule.
Well done!👍
Thank you 😊
Thanks Great Idea Video Channel
where are you study ?
Great! Thank you!
Whats the best design suits to economic but good output?
Chelford Quider an alternator is more economical due to its liw weight, Higher kW capacity. No brushes, no commutators and smooth operation. And if you need DC, you can take the alternator output and fed it to rectifier bridge. The total setup is mire economical than a generator.
If someone could help me I will be very grateful, is there another type of machine that converts mechanical energy to electrical energy that does not involve magnets... If you know the answer please help!
Yes there is. But it's not a machine. The device is piezoelectric sensor.
Er. Vivek Choubey can it convert a spinning fan to electrical energy?
Er. Vivek Choubey (thank you for responding!)
@@chrisawesome3091 this might help you ruclips.net/video/mH3pKaZDON0/видео.html
Sopperb explanation
Thanks for liking
See the subtitles at 3:08😂
😂 it happens sometimes from RUclips voice recognition system ...
Sorry 🤦, have corrected it now. It was taken up by RUclips automatically. Thanks for informing 😅
@@vipulwaghmode29 yes, thanks for understanding 😅
@@ervivekchoubeyno problem ,
And thank you so much , your videos are giving me a lot information ❤️
@@vipulwaghmode29 Thank you 😊
Thank you so much.
😊😊
Hi sr thanks for your great video. In terms differences wich one would be more efficient if you were planning a system for providing Ac electricity to a house off grid with or whithout a battery bank, a generator or an alternator?, taking into consideration that in the case of wind, rotating speeds will vary significantly
If you are talking about wind-generated power then definitely an AC generator or more specifically, an induction generator. Induction motor when made to run higher than the synchronous speed, it begins the generation of electricity and hence called induction generator. Finally, the output of the generator is fed to a converter circuit (rectifier) and stored in a battery.
To control the variation of speed, Ball-bearing must be connected to the windmill rotor as well as a speed controlling circuit must be there along with a gearbox to maintain a constant speed. You can learn about the windmill system on Google/RUclips.
@@ervivekchoubey Thanks a lot
In an Alternator, the Magnetic Field is NOT moving at all, in a Generator the Magnetic Field is rotating (Single Phase or Three Phase)...
Your drawings are not accurate for either machines, although your first as Thumbnail image is correct.
In a Typical Alternator the Magnetic Field run parallel to its shaft, and magnetic poles are re-routed/redirected through the steel claws in a NSNSNS configuration...but, no matter how fast shaft goes...North and South will always be on the same side of shaft.
You are welcome
thankyou !
how to the make free electric with generator motor kindly tell me
**THERE IS NO FREE ENERGY!**
You can't have a free electric generator no matter what you do. However there is a small generator that you can make which can turn fan air into electricity to lit small LEDs. Just search for a video titled "Turn an electric motor into generator" on my channel.
Sometimes the old fashioned way of doing things is better; instead of trying to draw using the computer screen, a blackboard and chalk would have been easier and faster.
Yes I do agree. This video is from the time I started making video on RUclips with very little experience.
Generator producing dc current?
Normally a DC Generator is referred as a generator whereas its more accurate to refer to an AC Generator as an Alternator.
Thank you!
Anytime :)
Thanx.
super bro
sar AVR key bare me btaey
Great
Thanks
Nice video but Dc12 motor 415dc motor 220ac motor explain sir
nirajan bovi sorry I am unable to understand your question.
_at generator and alternator formulla is _rotE#_dB/dt+rot(v*B) and rotH# J+dD/dt and HrotE--ErotH#div(H*E) _arch lord
Tanks sir
Oki
👍👍
speak indonesia?
No I am from India.
Not explained well. Although certain points correct
Thank you for your feedback.
Блин, ну это просто образцовая лекция. Из говна и палок, точнее пейнт и дрожащие руки.
an alternator is a generation, just another verson of it. generator is a generic term!
True. But alternator is a section of generator which generates alternating current. That's why in the beginning of the video I said that it's not incorrect to call alternator as generator, both are same.
😁
keep going
v nice
Thank you :)
okay? okay.
Acha hai
Ok,.........
explain in Kannada plz
I don't speak Kannada.
Slips ring
make in hindi also bro...
hindi bhasha me bhi bana de bhai....
typical hindi bhi ni keh rahaa hoon , bas normal ..
or haan koi dil pe mat lena.....
Kartavya Gupta bhai south Indians ke liye bhi hai ye video warna kr deta.
It's ok bro
Double brain use karna padega.
Or iske bad me hi bana k dal dunga...
complete nonsense....
No problem friend. I hope you come up with something better 👍
I'm sorry but your English is horrible to listen to. ok.
I'm sorry for the bad experience you had. This was a video when I started my channel and was testing a number of videos. I am improving the quality. I am not a native English speaker hence was finding it a but difficult back then. Sorry for the inconvenience.