History is exactly that.. HIStory.. Many great thinkers have been involved in perhaps what we take for granted everyday.. and even then perhaps people didn’t work collaboratively and some perhaps took credit for others work, the point is we are learning everyday… In my gratitude to Tesla it was the 2 phase cage motor that demonstrated phase displacement that I see as being key… (many motors of the time were wound rotor motors), this was later developed by the likes of Dolivo-Dobrovolsky, the efficiency of such was possible because of the development of the 3phase supply system.. credit where credit is due… I think Tesla was amazing ….
Have you seen the 2017 film, the current war? Great film regarding the a.c d.c battle and Teslas, historic input into the future of Motors.............;)
Although as we're finding today DC has significant advantages over AC for long distance transmission and with modern technology is simple to efficiently convert to AC for motors but of course that technology didn't exist back then so while DC was technically superior in many ways the technology to handle it effectively and efficiently didn't exist. All modern switch mode power supplies first convert the incoming AC to DC before then converting it to high frequency AC for conversion back to lower voltage DC.
@@kobirelf97 Film was made in 2017 but held back 2 years and relicensed/distributed because of the Harvey Weinstein investigations. I remember watching it on TV (netflix) 2 years ago, whilst drinking a nice cup of tea....;)
Further reading for you…. A universal AC motor is used in items such as food blender/lawnmower/vacuum cleaner.. noisy and not constantly rated (intermittent use) Series DC motors have poor speed control under load application, but have high starting torque.. battery drill/electric train/personnel lift Shunt (parallel) DC motors have very good speed reference under variable load conditions, but poor starting torque.. conveyor belt/escalator A combination of series And shunt connection would be what is known as a compound motor.. this machine would have the advantages of both series and shunt motors The fidget spinner speed is the synchronous speed of the motor, it is the speed of the rotating magnetic field The speed of the disk is the rotor speed RPM.. Notice in the video the fidget spinner is fast than the rotor speed… making this motor asynchronous… the difference between these is known as Slip.. it is fundamental for the operation of the motor but can be altered for efficiency.. by altering the number of pair of poles would alter the RPM of the motor more pairs of poles the slower the motor more torque.. squirrel cage motors are used for machine tools, pillar drill They have poor starting torque so are running before applying load The rotating magnetic field created by the 3phase motor stator has a rise and collapse of voltage therefore a rise and collapse of magnetic field.. this occurs at different time due to the sine wave DISPLACEMENT of the 3phase supply this displacement creates the rotating magnetic field.. self starting upon being energised, the displacement of the supply is 120degrees…. Thank you, I hope you find it useful…. Keep on learning🧲⚡️😎
Mikhail Dolivo-Dobrovolsky invented the squirrel cage motor not Tesla, Tesla developed a two phase induction motor based on other earlier work by Galileo Ferraris. Get it right and stop teaching students the wrong history! I also hope he doesn't teach that coiled extension leads overheat due to induction as I recently saw one lecturer claim. They don't.
Please.. anyone who views the video who is knowledgeable about rotor wound motors.. please accept the level intention and accuracy.. rotor wound motors are complex and require further description and intricacies of their operation … I’d love to do another video explaining further … 👍🏻👌🏻🙏🏼🧲⚡️
This is the problem why so many electricians know things that are wrong. It is because they are being taught wrong information and the justification is "we have to dumb it down to suit student electricians that don't have the intelligence to understand it properly". Perhaps they shouldn't be student electricians then. Motors are actually not that difficult if sufficient diagrams are used and practical demonstrations are used. And it can easily be done without mathematics. I am fed having to correct supposedly qualified electricians on YT that get it wrong so many times. And that American guy is one of the worst. His explanations are dire. And the reason is, because he hasn't been taught properly himself.
History is exactly that.. HIStory..
Many great thinkers have been involved in perhaps what we take for granted everyday.. and even then perhaps people didn’t work collaboratively and some perhaps took credit for others work, the point is we are learning everyday…
In my gratitude to Tesla it was the 2 phase cage motor that demonstrated phase displacement that I see as being key… (many motors of the time were wound rotor motors), this was later developed by the likes of Dolivo-Dobrovolsky, the efficiency of such was possible because of the development of the 3phase supply system..
credit where credit is due… I think Tesla was amazing ….
Building one of those, fantastic resource!
Great channel 👍
Have you seen the 2017 film, the current war? Great film regarding the a.c d.c battle and Teslas, historic input into the future of Motors.............;)
Sure have 👍🏻
Great film but you got the year wrong it came out in 2019 love that film watched it in the cinema
Although as we're finding today DC has significant advantages over AC for long distance transmission and with modern technology is simple to efficiently convert to AC for motors but of course that technology didn't exist back then so while DC was technically superior in many ways the technology to handle it effectively and efficiently didn't exist. All modern switch mode power supplies first convert the incoming AC to DC before then converting it to high frequency AC for conversion back to lower voltage DC.
@@kobirelf97 Film was made in 2017 but held back 2 years and relicensed/distributed because of the Harvey Weinstein investigations.
I remember watching it on TV (netflix) 2 years ago, whilst drinking a nice cup of tea....;)
Blessings and thanks
No way this is where I did my level 2 😄 still awaiting my news weekly prize 😉
Hi again Dad :)
Further reading for you….
A universal AC motor is used in items such as food blender/lawnmower/vacuum cleaner.. noisy and not constantly rated (intermittent use)
Series DC motors have poor speed control under load application, but have high starting torque.. battery drill/electric train/personnel lift
Shunt (parallel) DC motors have very good speed reference under variable load conditions, but poor starting torque.. conveyor belt/escalator
A combination of series And shunt connection would be what is known as a compound motor.. this machine would have the advantages of both series and shunt motors
The fidget spinner speed is the synchronous speed of the motor, it is the speed of the rotating magnetic field
The speed of the disk is the rotor speed RPM..
Notice in the video the fidget spinner is fast than the rotor speed… making this motor asynchronous… the difference between these is known as Slip.. it is fundamental for the operation of the motor but can be altered for efficiency.. by altering the number of pair of poles would alter the RPM of the motor more pairs of poles the slower the motor more torque.. squirrel cage motors are used for machine tools, pillar drill
They have poor starting torque so are running before applying load
The rotating magnetic field created by the 3phase motor stator has a rise and collapse of voltage therefore a rise and collapse of magnetic field.. this occurs at different time due to the sine wave DISPLACEMENT of the 3phase supply this displacement creates the rotating magnetic field.. self starting upon being energised, the displacement of the supply is 120degrees….
Thank you, I hope you find it useful…. Keep on learning🧲⚡️😎
Omg why this things are not covared in primary school here 😮
Hi dad :)
❤
Mikhail Dolivo-Dobrovolsky invented the squirrel cage motor not Tesla, Tesla developed a two phase induction motor based on other earlier work by Galileo Ferraris. Get it right and stop teaching students the wrong history! I also hope he doesn't teach that coiled extension leads overheat due to induction as I recently saw one lecturer claim. They don't.
Nicola Tesla did not invent the induction motor or ac electricity he just improved them
Please.. anyone who views the video who is knowledgeable about rotor wound motors.. please accept the level intention and accuracy.. rotor wound motors are complex and require further description and intricacies of their operation … I’d love to do another video explaining further … 👍🏻👌🏻🙏🏼🧲⚡️
This is the problem why so many electricians know things that are wrong. It is because they are being taught wrong information and the justification is "we have to dumb it down to suit student electricians that don't have the intelligence to understand it properly".
Perhaps they shouldn't be student electricians then.
Motors are actually not that difficult if sufficient diagrams are used and practical demonstrations are used. And it can easily be done without mathematics.
I am fed having to correct supposedly qualified electricians on YT that get it wrong so many times. And that American guy is one of the worst. His explanations are dire. And the reason is, because he hasn't been taught properly himself.
Good evening everyone ⚡️🧲
Evening Pete, All :)
Great collab Pete! Good to see you making these contributions.