CORRECTIONS: 1. The Nissan Leaf ring gear is held on with 8 bolts. Apparently, I can not count today! Thank you to everyone for catching my error. There are always errors ;) 2. To my great surprise, I was wrong about the fluid in this drive unit, it actually is Dexron 6 transmission fluid! 3. Tesla states that this is a four-pole motor. Induction motor rotors do not have poles, just the stator. The stator has four poles. Thank you to everyone for catching my error. 4. Silicon Nitride is a ceramic material. I was wrong to say the rotors bearing balls were not ceramic. Thank you to everyone for catching my error.
Hey professor John, just got a Chrysler Pacifica Hybrid. I’ve seen your video on the gear reduction gearbox but are you planning on doing a break down on the hybrid battery? Thanks for your videos and as alway another great video and explanation.
@@conelval seriously, can't even imagine a person that would thumbs down this video! perhaps they feel unworthy of the huge amount of information that wouldn't fit in their small brain... lol.
@@trumpetmaris Mindless TH-cam trolls find every video eventually. I think they get their jollies by being the first to downvote something, and they certainly don't take the time to watch.
At 9 yrs old I took apart my Grampa's radio cause I wanted to know what made it work. I'm 64 now and still want to know what's inside. Thank you sir for showing me what's inside and how it works. You're the best teacher I wish I'd had.
For years I have wondered what the makeup of the Tesla drive system was built like. I doubt that I have ever seen a more concisely explained explanation of any machine. Done with no showy exaggeration or hype, just as good as anyone could hope for. Thank you for your efforts
As an engineer, can't get enough. A fantastic and inspirational mechanical engineering talk for not only seasoned but new engineers. Your experience and humility are inspiring. Thank you for taking the time to share your knowledge and perspective. Much love.
A fantastic presentation and an example of excellent teaching. 'm neither a mechanic nor an engineer. I'm just a city guy who years ago traded a small second mortgage for a classic Mercedes 190 with a cracked head and in need of a restoration. After learning all I could about aluminum motors and restorations, I restored the 190 and sold it for a profit. My reason for telling my story was to compliment the professor on his thorough and coherent presentation on the Tesler motor and differential. Although my story about the 190 did not detail the restoration (
I think my favorite part was the explanation of the cooling system. It blows my mind that engineers can manage to get coolant to the right places in the correct amounts such that the system stays stable for so many years of operation. Thanks so much!
I'm in a wheelchair too and I love cars. I still was surprised when i saw that you were moving on wheels. We shouldn't stand only to stand and judge the wheelchair. thanks for showing everybody that we are still here and pushing hard to do what we like. You are an example, thank you.
Thank you very much! Sometimes I forget I am in a wheelchair. You are correct, people in wheelchairs can be very productive and contributing members of society. Thanks for watching
my grand mother had one leg. She was a little league baseball coach in th worst side of time. she worked as a 911 operator and also went sky diving with one leg. she was inspirational to me. how she never let being handicapped hold her back from doing what she wanted to do.She had a modified van that allowed her to drive
Thank you, Professor, I wish all my educators were as well-spoken as you. I would not have nodded off in the lecture hall as many times. As an Aviation Maintenance tech in the turbine engine department for 32 years, I say Bravo.
I am a 73 year old retired mechanic with above average knowledge of auto electrics and I really enjoyed the professor's detailed explanation of the drive unit. I have subscribed to the site and look forward to more.
I wanted to mention that, as a potter, I have uses nitride bonded silicon carbide kiln shelves to fire my pottery for years now. I believe that they are made of the same material as the bearings you mention. I fire my kilns to 2,400°F, though the shelves are only 3/8” thick, 18” X 18”, supported only at the four corners, and holding as much as 100 lb, they do not warp or distort and they are so dense that a molten glaze drip, when cooled, will not stick to the surface of the shelf. Incredible material! Thank you for your very informative and well presented video.
First rate lecture sir! Although I’m not a professional technician I get a huge amount of pleasure watching and learning from your videos. We recently bought an EV (Mini SE) and I’m itching to take it apart. Sadly my family appears less than enthusiastic about the idea so for now I’ll need to live the dream by watching all your EV drive line tear downs.
Understanding engineering concepts is quite easy for me, though understanding how Professor John Kelly keeps producing such awesome content on the other hand is much harder to grasp. This man was born to teach! From a fan in Australia, another bloody good effort mate.
Dear Professor Kelly, thank you for this impressive and very well explanatory video. As an electronics engineer who works in the field of e-mobility, I can confirm that Tesla has done an excellent job here. (That is one of the reasons why I have been driving a Model 3 with great pleasure for almost 2 years).
I been in the auto repair business for 40 years. Since there's no Tesla service info publicly available (as of last week in Alldata and ProDemand), I'll likely never get a chance to repair a Tesla because I plan on retiring in a couple years. We couldn't even get brake pads and rotors for a Model S that came in last week with a brake squeal. The brake system looks very much like any other disc brake system but no parts stores near us carried parts nor could they get them. The closest Tesla dealer is over 2 hours away. I wanted to drop the under shield to get a look at the motor/transaxle setup but my manager said not to just in case something went wrong. But I'll keep looking because I just want to see how they work. So far this video has been the most informative on their drivetrain setup. Thank you. Side note: To those saying electric cars are going to kill the auto service business: This car was a 2016 Model S with 38k miles and it already had worn brakes and the tires were getting close to the wear bars. The suspension system looked very much like the suspensions on our beloved fossil fuel vehicles. Assuming aftermarket parts do become available or a dealer is near you, I don't think you'll have to worry about losing work except for oil changes and engine air filters.
I enjoy the fact the narrator has disassembled (before reassembling) an actual component with explanations that can be understood by a lay person. Great learning tool by teaching that way.
This is simply the best of TH-cam, demystifying and inspiring. Added to superb content and presentation, audience centred post-production links for easy navigation and reference. Thank you for creating the gold standard for others to follow.
@@WeberAuto you say it is dry in there but do we really know whether they put some exotic gas in? I take it the atmosphere gets in through the bearings every time it cools down? I think dry is a matter of degree. Yes the atmosphere is a vapor. It's not clear if he is super drying air by taking it from the evaporative coil area for the cooling system. In terms of the camper mode and the heat pump history this video is helpful to explain that even electric cars in operation produce significant heat and that heat can be reused for passenger comfort as you say is rumored.
I have wound 3 phase ac motors for a good part of the last twenty years. A 500hp motor typically is around the size of a refrigerator and a 4 pole motor is typically 18 hundred rpm. I am absolutely blown away. Thank you for this video. Very impressive
This is one of the best videos I've seen of explaining the Tesla S series engine and transmission details. I'm studying to become an electric/hybrid car mechanic. Thank you so much for showing me all this.
As long as the gasoline stations had electricity to pump the gas out of underground tanks. If a station has an emergency gasoline fueled generator it can operate. The credit card system may not work, though, so they might be cash only.
Wow, that is some serious engineering; and you did a fantastic job in explaining the whole drive train and the various components. Appreciate the amount of time and effort you dedicated to making such a great video.
Amazing, just amazing that you’re able to follow all that tubing, ducting and break it down for the layman to understand. These Tesla engineers truly are squeezing the most HP/Torque they can out of these things and they’re still not done. Thank you for taking the time to do all these work to entertain us with your wonderful content.
These new electric autos are quite different from the combustion that I cut my teeth on 60+ years ago naturally but bearings, cooling & lubing haven't changed except for higher temps. Amazing video.
You are a great teacher. A big reason why is you are is your genuine enthusiasm for the subject. It doesn't matter how much academic training a teacher has, there is no substitute for love of the subject. Not to say academic training isn't very important and useful, it is.
Yet another "Gem" from Weber college; through one of THE greatest professors (John Kelly) on this planet; I do believe. For I can truly say without hesitation that of all the teachers, professors and instructors throughout my life (turn 89 on April 5th); that John is THE greatest. He is a blessing for sure. Thank you kind Sir. Again, If one can't learn under John, they simply can NOT learn, period IMHO.
@@blogengeezer4507 Interesting. But I want Russia, from a colorful third world country like African countries, to turn into a boring but developed country like the United States.
I'm pretty much a DA and don't even own a car. I find this guy so interesting at describing all this with his less than zero eggo. Refreshing and I learned something today! Loved when he smurked a bit, when he said "Ceramic Balls..."then got all serious. He thought about what he said. Love it!
I've been waiting for this video for a while, all the others just show the transmission but only you have the knowledge to teach us how it really works and show us all the little details like those bearings and the cooling system. Thank you Professor!
Superb video John. I haven't enjoyed a technical video so much for a long time. Your depth of engineering knowledge is impressive and your ability to get the message over in an understandable way is simply brilliant. Well done sir!
The hits just keep coming, another fantastic video. Pretty much the only channel on YT where I start a video and enjoy every minute right till the end.
I can appreciate all the design and engineering that went into this EV system...This is such a wonderful instructional video...I own a 2020 Model S and this is such a delight to understand the workings of the systems...Also, it is enlightening to see all the positive comments...Keep up the good work..
Amazing! So much high tech in such a 'simple' design, driving components to extreme conditions. Such a 'well' balanced system. Looking forward to watch the power electronics video tonight. Brilliant explanation (as usual). A 'perfect in every way' lecture! Respect!
According to the documentation I found, and looking in the parts catalog, the oil for the Model S large rear drive unit is "AUTOMATIC TRANSMISSION FLUID DEXRON VI - SYNTHETIC 212B (1031106- 00-A) - 3" The model S front drive unit is different, "LUBRICANT, MOBIL SHC 629 (1119780-00-A) - 1 LITRE - 2". So it really is just Dex6!
As always, the detailed explanations and the physical device demonstrations. I always feel that my brain has been taken to a good place with your videos, Professor. Thanks so much.
Wow , excellent break down and analysis, SKF is a world leader in bearing technology, and the engineering and sophisticated machining required in this 500Hp power train is quit impressive to say the least. Fantastic explanation.
So what you're saying is... DO-NOT physically damage that housing! Holy Smokes I had no clue of the level of simplicity and complexity going on in that assembly. I suspected as much but this blew my mind. Some adventurous engineering right there!!
You are an amazing teacher. I have a model S P 85 + and looking at upgrading the drive unit after experiencing a whining sound. Feel way more comfortable after watching your video. Thanks!
Power Grid reserves, the Root source of the tremendous torque/power sequestered inside the storage batteries, are enormous, efficient energy potentials.. if not constrained, restricted, overly regulated.. Steam power also capable of immense initial torque from relatively small piston, remarkable at time of Industrial Revolution ;}
Also, I'd like to thank you for the wonderful content you are creating. I've learned so much about cars from your videos! Keep making new episodes, please.
Stoked to see the quality content Weber State is putting out regarding EVs. It seems as if you are leading the charge in quality training in the nation! Every time I watch these videos, it makes me want to run up to campus and check it out in person. I’m just afraid I would quit my job and enroll back in school again (which may actually be a good great thing)
I'm a few days away from getting my long awaited Mach-E. This and John's video on the Bolt were very vey informative. In fact the Bolt video pushed me into buying the Mach-E. I hope he does a teardown of the Mach-E someday. Keep 'em coming John.
This is the best walkthrough of a Tesla motor and gear Ever. I’m impressed of the cooling system. Great work. I’m looking forward to see your next walkthrough.
Wow, I was hooked. Thanks so much for explaining - I cannot believe the speeds of those bearings... thats getting close to turbine speeds... wow! Really well presented. thanks.
one of the best videos I have watched in YT I work with Industrial automation and robotics, 48 years so far not planning to retire I have dealt with some very high speed applications and bearings ( mostly SKF btw ) I built 2 rally cars way back in my younger years never blew an engine I look at new generation of cars like Subaru WRX they pull 850 Hp out of those engines European Subaru full done rally car is 10 million Euros ! Thank you for an excellent video All The Best !
Excellent video. I think those “buttons” on the IGBT heat sinks are designed to avoid air bubbles forming on the heat sink, air bubbles would form an insulating layer between the heat sink and coolant. A similar technique is (was) used in cooling high power vacuum tubes and klystrons in broadcast transmitters.
The buttons create a non-laminar flow, which in addition to the increased surface area, causes the fluid to 'linger' longer and pick up more heat to be transferred out.
@@trumpetmaris Yes, but I think also to prevent air bubbles forming, though less of an issue here, with vapour-phase cooling is a big issue that has to be avoided.
@@G8YTZ re: "Yes, but I think also to prevent air bubbles forming" Welp, the laminar flow thing vs turbulent flow is a real thing. Turbulent flow works better to transfer heat energy, whether the working 'fluid' is air or water or something else ...
Thank you for sharing all this info that must have taken you many hours to compile. You and others like you make TH-cam a priceless source of information.
18:20 The balancing divots on the rotor are awesome! Every single rotor has to be precisely calibrated to prevent the motor from _blowing up_ through vibration!
Much neater than some of the larger / slower motors I've seen, where the balancing was done with an angle grinder! I have a suspicion that Tesla would have automated this process, for precise, repeatable accuracy.
I am not a mechanic just curiosity kicked in :) ... the way he explains was great..your students are lucky to have you as their mentor...sharing knowledge for free...keep it up professor! ..take care always and Godbless....made me a subscriber now!
Fascinating, and thanks very much. I cut my teeth as an engineering apprentice at Mawdsleys at Dursley in Gloucestershire in the late 1950s, who built a wide variety of motors and generators. Many were for Ward Leonard schemes, surely the pioneer (and then only possible) variable speed electrical drive. Insulating materials were then confined to impregnated paper, cotton tape and native mica! So I find myself re-learning (and trying to remember) things that I knew about, now at age 88! I now run a Renault EV!
It shouldn't flow much. Fluid needs enough time for heat transfer. We work with to spec.s CROSS TEMP> inflow temp and out flow temp. Too much flow = not enough time for HT, slow the fluid down = more transfer.
The coolant is also used to take heat off the drive unit to warm up other components such as HV battery. Thus it needs to be restricted flow to either heat soak the coolant or allow heat transfer when cooling Very intelligently made car
I'm a master electrician, I have seen many ac motors and DC motors with massive bearings, they are hooked up to drives because the ammout of torque the motors can generate on start up is insane, equipment can be destroyed if they are started across the line. Electric motors can be smaller but have massive amount of torque and power for their size
Amazing performance and explanation ! How can you be so clear and specific! I am also teacher in a mechanic college in France and take the curve of EV with my student is not obvious, so your explanations are welcome and I hope they could teach me to be more accurate in my explanation
I’m a Mechanical Engineer by education and training, and am blown away by the simplicity of the drive train. I daily drive a 90D Model S which I absolutely love to drive. I believe that a break through in rechargeable battery technology “is all that is needed” to make the vast majority of ICE obsolete. But that is a big big step.
Great video. Often you mention bearings and lube requirements. This made me think of my aviation turbine engine background. 17K RPM is about idle speed for a compressor on many turbines while some ( Allison T-63) turn at 60K + RPM. Being so I would venture that many of the Tesla items might have a Aviation heritage. Turbine engine oils also would be designed for the heat and RPM .
You remind me of the two top-notch auto shop instructors I had the pleasure of experiencing-in 1963 and 1964, San Leandro, California, Mr. Blanchard and Mr. Redeker at Pacific High.
That rotor cooling is brilliant, and likely the key to such high power density on these units. Although I wonder what kind of seal can withstand 18k RPM!?
The way that bracket fit on the back of the motor, that might be a service interval part, and not too hard to do w/o removing the motor/transmission. Maybe?
I particularly liked the cylindrical heat sink stubs. Am thinking they are better than internal fins in this application because they are probably less prone to clogging. Additionally, am guessing that they slow the flow a bit giving time for heat to transfer. Cool.
The difference is between smooth laminar flow and turbulent flow accounts for the use of the 'nubs' lets call them ... a mech engineer at Heathkit taught me that concept decades ago now ... the turbulent flow assures ALL the fluid sees contact with the nubs and housing, whereas laminar flow does not. Now you know!
I do not speak fluent English. But I was able to understand the speech ... by using clear sentences and words and the sequence of explanations in a simple logical way. Thank you...
One of the members of the diag.net recommended this channel and I am very thankful that they did! I've watched three of your videos and am now a subscriber! Thank you for making these superb videos!
He should reach out to Rich rebuilds, he has all kinds of parts that the school could use and Im pretty sure Rich wont charge an arm and a leg, hell he might hook the school up being that its for educational purposes..
Rich Hughes has involvement in class action lawsuit. Tesla forced to release Proprietary info for Owners/mechanics, to repair/service these vehicles. touted as Sustainable? , akin to Wind Turbines, that are massively accumulating worldwide ..'aged out' ... Junked... early ;}
Great channel professor very inspiring ... it's amazing the size to power ratio of these Tesla electric motors it's hard to imagine what the future holds for further reduction of size and weight to power output! 💪
The first fascination with that motor would not first be with the bearing design. In my humble opinion it is the rotor, with the unimaginable forces trying to pull that rotor apart! I would bet the engineers that designed this unit would agree it was the biggest challenge. As spinning objects increase in diameter just a wee bit centrifugal forces multiply greatly. Just try to make a 2 inch steel disk that you could spin to 10K RPM on A Dremel tool. You might die trying but if you found a material that held up to the task it would likely fail if you made it an eight of and inch bigger. Objects of this mass and diameter spinning at these RPM's might only be surpassed by rocket engine fuel pumps. I think A subject of interest would be if someone could calculate the forces of gyroscopic precession that rotor would create at 17K rpm! I promise it would blow your mind.
I'm an electrical/software engineer, but this is a great insight into Tesla core component design. The amount of thought that went into energy management of these cars is staggering. I just wish they made an attempt to make their cars without unnecessary 'wow effect' gizmos and more easily serviceable. I will be watching more videos in these series.
Recommended for other engineering videos about Tesla: IngineerX & Damien Maguire (who covers basically all so far affordable Tesla powertrain components and makes them run without a Tesla)
-As Nancy Pelosi left a Congressional meeting, after Biden election, subsequent Laws ending fossil fuels, she immediately bought Tesla Stock. It did a Bitcoin and rose shortly thereafter.. Martha Stewart needs a profuse apology... and financial compensation ;/
Thank you very much Professor, for your knowlejable and clear explanations of this very interesting subject. The main thing that I got from your explanations is the very high end engineering and quality of the materials of the Tesla motors.
Wow and wow again! Does this professional professor know his stuff! Truly an icon on teslas and other motors i would have to say! Truly professional! Aussie Chrisso 🥇🏆
Great informative video, I'm always worried that your going to drop one of those heavy gearboxes on your lap when moving them around on that work bench, happy to see your careful with them.
Imagine in a parallel universe where we’d been driving electric cars for the last 130 years, and someone tried to explain a new internal combustion engine with all it’s moving parts and cooling/lubrication systems it would be laughed out of existance.
The internal combustion engine is a huge reason why you have such a comfortable life today. There could not have been electric vehicles en masse before ICE.
At the end of the day, the ICE is a 100+% duty cycle device, where the electric assembly is not. Different devices. Different mindsets. Different constraints.
CORRECTIONS:
1. The Nissan Leaf ring gear is held on with 8 bolts. Apparently, I can not count today! Thank you to everyone for catching my error. There are always errors ;)
2. To my great surprise, I was wrong about the fluid in this drive unit, it actually is Dexron 6 transmission fluid!
3. Tesla states that this is a four-pole motor. Induction motor rotors do not have poles, just the stator. The stator has four poles. Thank you to everyone for catching my error.
4. Silicon Nitride is a ceramic material. I was wrong to say the rotors bearing balls were not ceramic. Thank you to everyone for catching my error.
Hey professor John, just got a Chrysler Pacifica Hybrid. I’ve seen your video on the gear reduction gearbox but are you planning on doing a break down on the hybrid battery? Thanks for your videos and as alway another great video and explanation.
@@haulngrassracing Thank you, I would like to if I could get my hands on one.
@@WeberAuto Well I would loan you our 2018 but I don’t think my wife would be so understanding 🤣
@@haulngrassracing LOL! Probably not
You're like me, one, two, three, many.
2 hours after release, 2000 views, 270 thumbs up and 0 thumbs down. This tells something about the quality of the material. Thank you professor.
Thank you very much!
Unbelievable how can someone give thumbs down to such a great and well-explained video...
@@conelval Thank you
@@conelval seriously, can't even imagine a person that would thumbs down this video! perhaps they feel unworthy of the huge amount of information that wouldn't fit in their small brain... lol.
@@trumpetmaris Mindless TH-cam trolls find every video eventually. I think they get their jollies by being the first to downvote something, and they certainly don't take the time to watch.
At 9 yrs old I took apart my Grampa's radio cause I wanted to know what made it work. I'm 64 now and still want to know what's inside. Thank you sir for showing me what's inside and how it works. You're the best teacher I wish I'd had.
Thank you very much
I assume you still have your old radio shack home tube tester someplace..I do...
For years I have wondered what the makeup of the Tesla drive system was built like. I doubt that I have ever seen a more concisely explained explanation of any machine. Done with no showy exaggeration or hype, just as good as anyone could hope for. Thank you for your efforts
Thank you very much
As an engineer, can't get enough. A fantastic and inspirational mechanical engineering talk for not only seasoned but new engineers. Your experience and humility are inspiring. Thank you for taking the time to share your knowledge and perspective. Much love.
Glad you enjoyed it
Also of interest to the general public.. not just engineers.
Love it.please continue doing dis
A fantastic presentation and an example of excellent teaching.
'm neither a mechanic nor an engineer. I'm just a city guy who years ago traded a small second mortgage for a classic Mercedes 190 with a cracked head and in need of a restoration. After learning all I could about aluminum motors and restorations, I restored the 190 and sold it for a profit.
My reason for telling my story was to compliment the professor on his thorough and coherent presentation on the Tesler motor and differential.
Although my story about the 190 did not detail the restoration (
This (comment above) so much from an appreciative retired UK electrical engineer.
I think my favorite part was the explanation of the cooling system. It blows my mind that engineers can manage to get coolant to the right places in the correct amounts such that the system stays stable for so many years of operation. Thanks so much!
I'm in a wheelchair too and I love cars. I still was surprised when i saw that you were moving on wheels. We shouldn't stand only to stand and judge the wheelchair. thanks for showing everybody that we are still here and pushing hard to do what we like. You are an example, thank you.
Thank you very much! Sometimes I forget I am in a wheelchair. You are correct, people in wheelchairs can be very productive and contributing members of society. Thanks for watching
@@WeberAutog
EV chair coming soon.... (18000 RPM..!)
@@Mercmad Yes, imagine what Tesla could build to drive a wheelchair! Would need a helmet as you went down the interstate to keep bugs out of teeth!
my grand mother had one leg. She was a little league baseball coach in th worst side of time. she worked as a 911 operator and also went sky diving with one leg. she was inspirational to me. how she never let being handicapped hold her back from doing what she wanted to do.She had a modified van that allowed her to drive
Thank you, Professor, I wish all my educators were as well-spoken as you. I would not have nodded off in the lecture hall as many times. As an Aviation Maintenance tech in the turbine engine department for 32 years, I say Bravo.
Thank you very much!
Omg we are so lucky to hear these from a professor instead of a youtuber. Thanks for quality content
Professor vibes are always the best. I really began learning at age 15 when I met my first carpentry tutor. Thanks Peter Fletcher 👍
I am a 73 year old retired mechanic with above average knowledge of auto electrics and I really enjoyed the professor's detailed explanation of the drive unit. I have subscribed to the site and look forward to more.
Wow, thanks!
I wanted to mention that, as a potter, I have uses nitride bonded silicon carbide kiln shelves to fire my pottery for years now. I believe that they are made of the same material as the bearings you mention. I fire my kilns to 2,400°F, though the shelves are only 3/8” thick, 18” X 18”, supported only at the four corners, and holding as much as 100 lb, they do not warp or distort and they are so dense that a molten glaze drip, when cooled, will not stick to the surface of the shelf. Incredible material! Thank you for your very informative and well presented video.
Awesome information, thank you!
First rate lecture sir! Although I’m not a professional technician I get a huge amount of pleasure watching and learning from your videos. We recently bought an EV (Mini SE) and I’m itching to take it apart. Sadly my family appears less than enthusiastic about the idea so for now I’ll need to live the dream by watching all your EV drive line tear downs.
Understanding engineering concepts is quite easy for me, though understanding how Professor John Kelly keeps producing such awesome content on the other hand is much harder to grasp.
This man was born to teach!
From a fan in Australia, another bloody good effort mate.
Thank you very much!
Are you the guy who does the Thompson CVJ video? That's a great piece of mechanical work.
Dear Professor Kelly,
thank you for this impressive and very well explanatory video.
As an electronics engineer who works in the field of e-mobility, I can confirm that Tesla has done an excellent job here.
(That is one of the reasons why I have been driving a Model 3 with great pleasure for almost 2 years).
Thank you very much
I been in the auto repair business for 40 years. Since there's no Tesla service info publicly available (as of last week in Alldata and ProDemand), I'll likely never get a chance to repair a Tesla because I plan on retiring in a couple years. We couldn't even get brake pads and rotors for a Model S that came in last week with a brake squeal. The brake system looks very much like any other disc brake system but no parts stores near us carried parts nor could they get them. The closest Tesla dealer is over 2 hours away. I wanted to drop the under shield to get a look at the motor/transaxle setup but my manager said not to just in case something went wrong. But I'll keep looking because I just want to see how they work. So far this video has been the most informative on their drivetrain setup. Thank you.
Side note: To those saying electric cars are going to kill the auto service business: This car was a 2016 Model S with 38k miles and it already had worn brakes and the tires were getting close to the wear bars. The suspension system looked very much like the suspensions on our beloved fossil fuel vehicles. Assuming aftermarket parts do become available or a dealer is near you, I don't think you'll have to worry about losing work except for oil changes and engine air filters.
Great comments, I agree. Thanks for watching
I enjoy the fact the narrator has disassembled (before reassembling) an actual component with explanations that can be understood by a lay person. Great learning tool by teaching that way.
Thank you very much
This is simply the best of TH-cam, demystifying and inspiring. Added to superb content and presentation, audience centred post-production links for easy navigation and reference. Thank you for creating the gold standard for others to follow.
Thank you so much 😀
@@WeberAuto you say it is dry in there but do we really know whether they put some exotic gas in? I take it the atmosphere gets in through the bearings every time it cools down? I think dry is a matter of degree. Yes the atmosphere is a vapor. It's not clear if he is super drying air by taking it from the evaporative coil area for the cooling system. In terms of the camper mode and the heat pump history this video is helpful to explain that even electric cars in operation produce significant heat and that heat can be reused for passenger comfort as you say is rumored.
@@arts8302 I do not know about an exotic gas being in there, but it is possible.
I have wound 3 phase ac motors for a good part of the last twenty years. A 500hp motor typically is around the size of a refrigerator and a 4 pole motor is typically 18 hundred rpm. I am absolutely blown away. Thank you for this video. Very impressive
Excellent, informative, engaging. You are the sort of teacher every mechanical engineer like myself crave for, take a bow Prof John!
Thank you very much
This is one of the best videos I've seen of explaining the Tesla S series engine and transmission details.
I'm studying to become an electric/hybrid car mechanic. Thank you so much for showing me all this.
You are very welcome
Full electric vehicles weakened/failed across Texas freeze, as the overloaded Grid failed., Hybrids had no such problems ;}
As long as the gasoline stations had electricity to pump the gas out of underground tanks. If a station has an emergency gasoline fueled generator it can operate. The credit card system may not work, though, so they might be cash only.
@@blogengeezer4507 A once in 20 to 30 year event; No one goes anywhere in those conditions, so?
Thanks. Channel is teaching me so much in my 3rd age !
Thank you very much Tony!
Wow, that is some serious engineering; and you did a fantastic job in explaining the whole drive train and the various components. Appreciate the amount of time and effort you dedicated to making such a great video.
Thank you very much
Amazing, just amazing that you’re able to follow all that tubing, ducting and break it down for the layman to understand. These Tesla engineers truly are squeezing the most HP/Torque they can out of these things and they’re still not done. Thank you for taking the time to do all these work to entertain us with your wonderful content.
Glad you enjoyed it! Thanks for watching
These new electric autos are quite different from the combustion that I cut my teeth on 60+ years ago naturally but bearings, cooling & lubing haven't changed except for higher temps. Amazing video.
You are a great teacher. A big reason why is you are is your genuine enthusiasm for the subject. It doesn't matter how much academic training a teacher has, there is no substitute for love of the subject. Not to say academic training isn't very important and useful, it is.
Yet another "Gem" from Weber college; through one of THE greatest professors (John Kelly) on this planet; I do believe.
For I can truly say without hesitation that of all the teachers, professors and instructors throughout my life (turn 89 on April 5th); that John is THE greatest. He is a blessing for sure. Thank you kind Sir. Again, If one can't learn under John, they simply can NOT learn, period IMHO.
Thank you very much! Best wishes
this time you, professor, are laughing and looking very pleased. Nice to see you more emotional in a good mood. your subscriber from Russian Siberia.
It was a lot of fun. Thank you
'Bald and Bankrupt', speaking fluent Russian, tours former USSR, searching for Anything 'Soviet'. Periodically depicts 'junked' ..[due to lack of factory support],..
luxury vehicles.
Vehicles that innovative Russians have acquired, Installed Diesel engines, conventional drive trains.
Brilliant concept, creative individuals, to Really render these complex vehicles ... .... Sustainable ;}
@@blogengeezer4507 Interesting. But I want Russia, from a colorful third world country like African countries, to turn into a boring but developed country like the United States.
I'm pretty much a DA and don't even own a car. I find this guy so interesting at describing all this with his less than zero eggo. Refreshing and I learned something today!
Loved when he smurked a bit, when he said "Ceramic Balls..."then got all serious. He thought about what he said. Love it!
Thanks for watching
didn't think I'd watch a 45 minute video on this, but it was fascinating!
Thanks for watching. I hear that quite often about my very long videos
I've been waiting for this video for a while, all the others just show the transmission but only you have the knowledge to teach us how it really works and show us all the little details like those bearings and the cooling system. Thank you Professor!
Glad you liked it! Thank you
Very nice video, and very easy to follow and understand for those that are not english native speaking.
Understanding the high performance teaching skills of the big Professor is a video I'd like to see!
Another bloody good video Prof.
Thank you very much
Superb video John. I haven't enjoyed a technical video so much for a long time.
Your depth of engineering knowledge is impressive and your ability to get the message over in an understandable way is simply brilliant. Well done sir!
Thank you very much!
This is useful in the extreme. Thank you for creating this explanation of the parts that make electric cars go!
The hits just keep coming, another fantastic video. Pretty much the only channel on YT where I start a video and enjoy every minute right till the end.
Glad you like them!
I can appreciate all the design and engineering that went into this EV system...This is such a wonderful instructional video...I own a 2020 Model S and this is such a delight to understand the workings of the systems...Also, it is enlightening to see all the positive comments...Keep up the good work..
Thank you very much
Amazing! So much high tech in such a 'simple' design, driving components to extreme conditions. Such a 'well' balanced system. Looking forward to watch the power electronics video tonight.
Brilliant explanation (as usual). A 'perfect in every way' lecture! Respect!
inverted commas are not used for emphasis in english. Stop using them in that manner.
According to the documentation I found, and looking in the parts catalog, the oil for the Model S large rear drive unit is "AUTOMATIC TRANSMISSION FLUID DEXRON VI - SYNTHETIC 212B (1031106- 00-A) - 3" The model S front drive unit is different, "LUBRICANT, MOBIL SHC 629 (1119780-00-A) - 1 LITRE - 2".
So it really is just Dex6!
You are absolutely correct, I was wrong about that. Thank you!
Do you by chance know if it's Dexron 6 for the Model 3 Performance F&R motors?
-Same used in 4x4 Transfer case GMs?
@@gabeh7373 It is not
@@blogengeezer4507 Yes
As always, the detailed explanations and the physical device demonstrations. I always feel that my brain has been taken to a good place with your videos, Professor. Thanks so much.
Thank you, you are most welcome
Incredible work, professor! Making curiosity visible, watch and learn from a master. Production quality and clarity helps immensely, well done team!
Thank you very much
Wow , excellent break down and analysis, SKF is a world leader in bearing technology, and the engineering and sophisticated machining required in this 500Hp power train is quit impressive to say the least. Fantastic explanation.
Thank you very much
So what you're saying is... DO-NOT physically damage that housing! Holy Smokes I had no clue of the level of simplicity and complexity going on in that assembly. I suspected as much but this blew my mind. Some adventurous engineering right there!!
You are an amazing teacher. I have a model S P 85 + and looking at upgrading the drive unit after experiencing a whining sound. Feel way more comfortable after watching your video. Thanks!
It blows my mind that a single AC motor of this size can put out over 500hp. That's just amazing.
I thought the same thing
@@WeberAuto I'm sure my first ride in a trimotor next year is going to be a religious experience ; )
@@tachikaze222 That sounds like a lot of fun!
Power Grid reserves, the Root source of the tremendous torque/power sequestered inside the storage batteries, are enormous, efficient energy potentials.. if not constrained, restricted, overly regulated..
Steam power also capable of immense initial torque from relatively small piston, remarkable at time of Industrial Revolution ;}
Imagine if it were a PM motor, which would be about one-half the size.
Also, I'd like to thank you for the wonderful content you are creating. I've learned so much about cars from your videos! Keep making new episodes, please.
Thanks, many more to come!
Retired '80s era ASE knuckle-buster appreciates your sharing & walking thru that for us, Old Bean. ;)
Thanks, I have busted a few of my own in that same era. Thanks for watching
Stoked to see the quality content Weber State is putting out regarding EVs. It seems as if you are leading the charge in quality training in the nation!
Every time I watch these videos, it makes me want to run up to campus and check it out in person. I’m just afraid I would quit my job and enroll back in school again (which may actually be a good great thing)
I'm a few days away from getting my long awaited Mach-E. This and John's video on the Bolt were very vey informative. In fact the Bolt video pushed me into buying the Mach-E. I hope he does a teardown of the Mach-E someday. Keep 'em coming John.
I hope to get one here at our school someday. Thanks for watching
This is the best walkthrough of a Tesla motor and gear Ever. I’m impressed of the cooling system. Great work. I’m looking forward to see your next walkthrough.
Wow, I was hooked. Thanks so much for explaining - I cannot believe the speeds of those bearings... thats getting close to turbine speeds... wow! Really well presented. thanks.
Glad you enjoyed it!
Very much like a comprehensive crash course. Very clear explanations that I learned so much in just under an hour watching. Thanks.
one of the best videos I have watched in YT I work with Industrial automation and robotics, 48 years so far not planning to retire I have dealt with some very high speed applications and bearings ( mostly SKF btw ) I built 2 rally cars way back in my younger years never blew an engine I look at new generation of cars like Subaru WRX they pull 850 Hp out of those engines European Subaru full done rally car is 10 million Euros ! Thank you for an excellent video All The Best !
Wow, thanks!
Excellent video. I think those “buttons” on the IGBT heat sinks are designed to avoid air bubbles forming on the heat sink, air bubbles would form an insulating layer between the heat sink and coolant. A similar technique is (was) used in cooling high power vacuum tubes and klystrons in broadcast transmitters.
Very interesting! Thanks for the information
The buttons create a non-laminar flow, which in addition to the increased surface area, causes the fluid to 'linger' longer and pick up more heat to be transferred out.
@@trumpetmaris Yes, but I think also to prevent air bubbles forming, though less of an issue here, with vapour-phase cooling is a big issue that has to be avoided.
@@trumpetmaris Awesome information, thank you!
@@G8YTZ re: "Yes, but I think also to prevent air bubbles forming"
Welp, the laminar flow thing vs turbulent flow is a real thing. Turbulent flow works better to transfer heat energy, whether the working 'fluid' is air or water or something else ...
You are a very clever man Prof. Thank you for sharing your knowledge, I find it very interesting. Keep safe and best regards from the UK.
Thanks, you too!
Thank you for sharing all this info that must have taken you many hours to compile. You and others like you make TH-cam a priceless source of information.
18:20 The balancing divots on the rotor are awesome! Every single rotor has to be precisely calibrated to prevent the motor from _blowing up_ through vibration!
Thanks for watching
Much neater than some of the larger / slower motors I've seen, where the balancing was done with an angle grinder! I have a suspicion that Tesla would have automated this process, for precise, repeatable accuracy.
I am not a mechanic just curiosity kicked in :) ... the way he explains was great..your students are lucky to have you as their mentor...sharing knowledge for free...keep it up professor! ..take care always and Godbless....made me a subscriber now!
So nice of you. Thanks for watching
Fascinating, and thanks very much. I cut my teeth as an engineering apprentice at Mawdsleys at Dursley in Gloucestershire in the late 1950s, who built a wide variety of motors and generators. Many were for Ward Leonard schemes, surely the pioneer (and then only possible) variable speed electrical drive. Insulating materials were then confined to impregnated paper, cotton tape and native mica! So I find myself re-learning (and trying to remember) things that I knew about, now at age 88! I now run a Renault EV!
Very interesting, Professor. Thank you for sharing. I had no idea the cooling system was so complicated. Looking forward to the next three parts!
I was also surprised. Thanks
Wow! Excellent video, I appreciate this level of detail and explanation very much.
Thank you very much!
we need tom Tesla content as well haha
Still salty you sold the Grand National, Tom. You'll never live that down!
Tom Tesla!!!
Mm
Köszönjük!
Thank you very much!
Amazing! Thank you for bringing this major bit of information to us gas guzzler gate watchers. Your efforts are deeply appreciated.
Thank you very much!
The stuff you do is a one of kind on the internet... thanks so much.
Thank you
Thanks for the great video!! I purchased my P90DL a month ago and this is the only video I could find that gives me a full breakdown.
Great job on this. Amazing to me that the cooling system is effective. Doesn't seem like it flows that much.
Thank you
It shouldn't flow much. Fluid needs enough time for heat transfer. We work with to spec.s CROSS TEMP> inflow temp and out flow temp. Too much flow = not enough time for HT, slow the fluid down = more transfer.
Welcome to the geenyus of Tesla.
@@bretmuldner faster flow is cools faster, as convection is faster than conduction.
The coolant is also used to take heat off the drive unit to warm up other components such as HV battery. Thus it needs to be restricted flow to either heat soak the coolant or allow heat transfer when cooling Very intelligently made car
Reminds me of going to technical college for automotive, I had great teachers. Thanks Weber Auto!!!
Thank you
Always amazed how such small motors can produce so much output power. Work of art!
I'm a master electrician, I have seen many ac motors and DC motors with massive bearings, they are hooked up to drives because the ammout of torque the motors can generate on start up is insane, equipment can be destroyed if they are started across the line. Electric motors can be smaller but have massive amount of torque and power for their size
Amazing performance and explanation ! How can you be so clear and specific! I am also teacher in a mechanic college in France and take the curve of EV with my student is not obvious, so your explanations are welcome and I hope they could teach me to be more accurate in my explanation
I’m a Mechanical Engineer by education and training, and am blown away by the simplicity of the drive train. I daily drive a 90D Model S which I absolutely love to drive. I believe that a break through in rechargeable battery technology “is all that is needed” to make the vast majority of ICE obsolete. But that is a big big step.
Thanks for watching
@@WeberAuto My pleasure! Thank you for making such a great video.
Great video. Often you mention bearings and lube requirements. This made me think of my aviation turbine engine background. 17K RPM is about idle speed for a compressor on many turbines while some ( Allison T-63) turn at 60K + RPM. Being so I would venture that many of the Tesla items might have a Aviation heritage. Turbine engine oils also would be designed for the heat and RPM .
Some people are just naturals.....you're one of them John. Great Job!
Thank you very much
You remind me of the two top-notch auto shop instructors I had the pleasure of experiencing-in 1963 and 1964, San Leandro, California, Mr. Blanchard and Mr. Redeker at Pacific High.
Thank you very much
That rotor cooling is brilliant, and likely the key to such high power density on these units. Although I wonder what kind of seal can withstand 18k RPM!?
I wondered the same thing. Thanks for watching
The way that bracket fit on the back of the motor, that might be a service interval part, and not too hard to do w/o removing the motor/transmission. Maybe?
This was a very well put together video, thanks WeberAuto. Your knowledge base is extremely appreciated!!
Glad it was helpful!
Thank you for the highly technical tutor of theTesla motor mechanical and
clear explanations of the gears
and electrical functions in the
motor.
Thanks for watching
I particularly liked the cylindrical heat sink stubs. Am thinking they are better than internal fins in this application because they are probably less prone to clogging. Additionally, am guessing that they slow the flow a bit giving time for heat to transfer. Cool.
The difference is between smooth laminar flow and turbulent flow accounts for the use of the 'nubs' lets call them ... a mech engineer at Heathkit taught me that concept decades ago now ... the turbulent flow assures ALL the fluid sees contact with the nubs and housing, whereas laminar flow does not. Now you know!
The nubs provide additional surface area for cooling. Flows thru here are very low so turbulence or flow resistance is not an issue.
Great video, clearly explaining how the motor works. Thank you very much for an enjoyable 46 minutes.
Glad you enjoyed it
Un-American splendid explanation. Straight to the point, very clear! A salute for Prof. Kelly
Thank you!
I do not speak fluent English. But I was able to understand the speech ... by using clear sentences and words and the sequence of explanations in a simple logical way.
Thank you...
Thank you very much
Such a dedication to teach, and so well done. Thank you.
Thank you very much
Best video regarding Tesla motor on youtube by far, maybe on the internet. This is what we want to see.
Thank you very much
I worked on military aircraft from 82' to 2020. As soon as I saw that gear reduction unit it reminded me of mil spec parts.
Impressive. Great video!
It does have more of a turbine reduction unit of a helicopter than an "automotive gear box".
Thanks for watching
This video is fantastic. I've learned a mountain from you. Thank you for making such a brilliant and interesting video!
Glad you enjoyed it!
One of the members of the diag.net recommended this channel and I am very thankful that they did! I've watched three of your videos and am now a subscriber! Thank you for making these superb videos!
Awesome! Thank you!
He should reach out to Rich rebuilds, he has all kinds of parts that the school could use and Im pretty sure Rich wont charge an arm and a leg, hell he might hook the school up being that its for educational purposes..
Thanks for your suggestion
He may take their principal out for dinner.
Rich Hughes has involvement in class action lawsuit. Tesla forced to release Proprietary info for Owners/mechanics, to repair/service these vehicles. touted as Sustainable? , akin to Wind Turbines, that are massively accumulating worldwide ..'aged out' ... Junked... early ;}
Funny, that's who I was thinking of while watching this, it's probably why I am here, due to watching Rich and his homeless assistant !
@@blogengeezer4507 WAS Tesla forced to release Proprietary info for Owners/mechanics, to repair/service these vehicles? Where are they available?
Great channel professor very inspiring ... it's amazing the size to power ratio of these Tesla electric motors it's hard to imagine what the future holds for further reduction of size and weight to power output! 💪
Thanks for watching!
As an Electrical Engineer I enjoyed your video a lot! Wonderful video :)
Thank you. This is an interesting and professional webinar. Keep going, and good luck.
The first fascination with that motor would not first be with the bearing design. In my humble opinion it is the rotor, with the unimaginable forces trying to pull that rotor apart! I would bet the engineers that designed this unit would agree it was the biggest challenge. As spinning objects increase in diameter just a wee bit centrifugal forces multiply greatly. Just try to make a 2 inch steel disk that you could spin to 10K RPM on A Dremel tool. You might die trying but if you found a material that held up to the task it would likely fail if you made it an eight of and inch bigger. Objects of this mass and diameter spinning at these RPM's might only be surpassed by rocket engine fuel pumps. I think A subject of interest would be if someone could calculate the forces of gyroscopic precession that rotor would create at 17K rpm! I promise it would blow your mind.
Cool Technology! Thanks for watching
Thank you
I'm an electrical/software engineer, but this is a great insight into Tesla core component design. The amount of thought that went into energy management of these cars is staggering. I just wish they made an attempt to make their cars without unnecessary 'wow effect' gizmos and more easily serviceable. I will be watching more videos in these series.
What has you comment to do that you are a electrical/software engineer?
@@littlereptilian7580
Stop being jealous of other people's success kiddo
John, another well-done presentation with great lighting and camera angles. You and Jack Rickard would have made for an awesome collaboration.
Thank you very much
Excellent, finally something about engineering and not "Tesla stock! Tesla stock! Tesla stock! Tesla stock!"
LOL, thank you
NoLOL. The business types are such hype.We need substance!
Recommended for other engineering videos about Tesla: IngineerX & Damien Maguire (who covers basically all so far affordable Tesla powertrain components and makes them run without a Tesla)
-As Nancy Pelosi left a Congressional meeting, after Biden election, subsequent Laws ending fossil fuels, she immediately bought Tesla Stock.
It did a Bitcoin and rose shortly thereafter..
Martha Stewart needs a profuse apology... and financial compensation ;/
Thank you very much Professor, for your knowlejable and clear explanations of this very interesting subject.
The main thing that I got from your explanations is the very high end engineering and quality of the materials of the Tesla motors.
Wow and wow again! Does this professional professor know his stuff!
Truly an icon on teslas and other motors i would have to say! Truly professional!
Aussie Chrisso 🥇🏆
Wow, thanks!
This was magnificent! Excellent job!
Thanks for watching
Thank you. This is by far the best video I have seen on the subject(s). The graphics are just amazing. Truly professional.
Great informative video, I'm always worried that your going to drop one of those heavy gearboxes on your lap when moving them around on that work bench, happy to see your careful with them.
Thank you very much
Imagine in a parallel universe where we’d been driving electric cars for the last 130 years, and someone tried to explain a new internal combustion engine with all it’s moving parts and cooling/lubrication systems it would be laughed out of existance.
LOL, thanks for watching
The internal combustion engine is a huge reason why you have such a comfortable life today. There could not have been electric vehicles en masse before ICE.
and comparing the weight..of a big block chevy engine.. 575 pounds!...
At the end of the day, the ICE is a 100+% duty cycle device, where the electric assembly is not. Different devices. Different mindsets. Different constraints.
@@wesmon3614 I think it can also be argued that we would have had mass EVs a lot sooner if not for ICE.
Fantastic video. So well explained. I have to say though, that when you talked about a reluctor ring, I immediately thought of the turbo encabulator.
LOL! Thanks for watching
I wish someone did a companion piece on the inverter portion, going into a similar level of detail...
That would be interesting