Understanding the Tesla Model S Performance Motor

Join me for a deep dive into the details of the 18,000 RPM performance rear motor and drive unit from a 2015-2016 Tesla Model S P90D. This drive unit is similar to the one used in the 2017-2020 P100D. The video is divided into four sections showing: 1. The motor and gears. 2. The high-performance bearings. 3. The lubrication system. and 4. The cooling system.
CORRECTIONS:
Thank you to everyone for catching my errors. There are always errors ;)
1. The Nissan Leaf ring gear is held on with 8 bolts, not 6.
2. The fluid in this drive unit is Dexron 6 transmission fluid.
3. Induction motor rotors do not have poles, just the stator. The 60 slot stator has four poles.
4. Silicon Nitride is a ceramic material.
TIMELINE:
0:00 Start
0:10 Introduction
1:35 Gearbox housing
2:10 Video Section 1 - Gears and Motor Rotor
2:45 The giant differential ring gear with 16-bolts!
4:20 The giant differential case bearings
4:50 The differential case speed at 250 km/h (155 mph) = 1841 RPM
5:15 MUST SEE Comparing the Tesla 213mm x 50mm. ring gear to a Chevrolet Bolt EV and Nissan Leaf EV
5:40 A Chevrolet Bolt EV differential 198mm x 34.3mm ring gear with 12-bolts.
6:10 A Nissan Leaf EV differential 200mm x 32mm ring gear with 8-bolts!
7:30 The Counter Shaft (Jack Shaft) with 25 pinion gear teeth. 78/25 = 3.12:1 Gear ratio from countershaft to the differential case
8:50 The countershaft speed at 250 km/h (155 mph) = 5743 RPM
9:30 The motor shaft with 25 teeth drives 78 teeth on the countershaft for another gear reduction of 78/25 = 3.12:1
10:08 The motor shaft speed at 250 km/h (155 mph) = 17,919 RPM
11:20 See all three gears in the reduction gearbox with an overall gear reduction of (78/25) x (78/25) = 9.7344:1
12:05 MUST SEE The AC Induction Motor Rotor with 74 bars
13:25 Motor specifications for power, torque, and gear ratio
15:00 MUST SEE Ceramic Bearings (Silicon Nitride) on the rotor from the SKF Group (skf.com)
16:22 MUST SEE Close up view of silicon nitride bearing
18:20 The motor rotor speed sensor reluctor wheel (tone ring)
19:22 Must SEE The rotor installed on the drive gear and the functioning gearbox
20:18 Video Section 2 - Specialized Bearings
21:21 The 60 slot four-pole stator and housing
23:05 The oil pump and how it is overdriven by the differential ring gear 23/78 = 0.2948:1 gear ratio (3.339 times faster than the ring gear)
23:55 MUST SEE The function of the oil pump (it may surprise you)
26:27 Motor shaft bearing reference speed and limiting speeds
27:30 How to run bearings at higher speeds than their limiting speeds
29:54 Video Section 3 - Lubrication
30:25 Drain and fill plug locations
30:50 Gearbox vent and inverter vents
31:05 Sport model label
31:39 MUST SEE Four different sealed areas in the drive unit
32:46 Video Section 4 - Cooling System
33:30 MUST SEE The coolant inlet port and the two paths coolant takes
33:53 Up for rotor cooling and gearbox cooling
35:03 Down for stator and inverter cooling
36:05 Coolant from the rotor moves to the gearbox heat exchanger and the outlet port
37:25 Stator temperature sensors
38:10 Coolant from the stator to the inverter coolant passages
38:28 Stator coolant temperature sensor
38:35 MUST SEE Insulated-Gate Bi-Polar Transistor (IGBT) module coolant passages and flow through gearbox passages
40:34 Inverter coolant outlet temperature sensor
40:45 The gearbox oil-to-coolant heat exchanger
41:38 Coolant outlet port to coolant pump and on-board charger module under the back seat.
41:55 Drive unit cooling system summary
43:04 IGBT inverter modules installed and inverter cover
43:40 High voltage battery cable connections and low voltage connections at the inverter
44:35 Video summary
ABOUT US
Weber State University (WSU) Davis Campus - Automotive Technology Department - Advanced Vehicles Lab. A technical description and demonstration of the Tesla P90D Rear Drive Unit (RDU). We teach current vehicle technologies to our automotive students at Weber State University and online. For more information visit: www.weber.edu/automotive
This video was created and edited by Professor John D. Kelly at WSU. For a full biography, see www.weber.edu/automotive/J_Kelly.html
Visit my other youtube channel idmilk.info to see the amazing NVH app for vibration diagnosis!
ADDITIONAL TRAINING FOR YOU
Join us for hybrid and electric vehicle training with two online courses and in a 5-day on-campus boot camp with Professor John D. Kelly. See www.weber.edu/evtraining
DONATE TO OUR DEPARTMENT
Please consider a donation to the Department of Automotive Technology at Weber State University here: advancement.weber.edu/Automotive

Komentar

  • Hello Dolly
    Hello Dolly4 jam yang lalu

    I believe those knobbly heat exchangers are called pin-fins. Thank you for a great tear-down.

  • Avelino Goncalves
    Avelino GoncalvesHari Yang lalu

    Nissan with 8 bolts...wight?

  • WeberAuto

    WeberAuto

    6 jam yang lalu

    @Avelino Goncalves Thank you

  • Avelino Goncalves

    Avelino Goncalves

    7 jam yang lalu

    @WeberAuto After, I saw your acknowledge. Thank you for your care! BTW...great video!! Mainly because you showed that there are fluid to be exchanged ate roughly every 100K miles, top at those loads! But Dextron knows it better!

  • WeberAuto

    WeberAuto

    Hari Yang lalu

    Yes, I was wrong. Thanks

  • Ayoub Boulehfa
    Ayoub BoulehfaHari Yang lalu

    Excellent video

  • WeberAuto

    WeberAuto

    Hari Yang lalu

    Glad you liked it

  • Didža Nazis
    Didža Nazis2 hari yang lalu

    Damn, those bearings!

  • WeberAuto

    WeberAuto

    2 hari yang lalu

    I thought the same thing

  • Johan Grimm
    Johan Grimm2 hari yang lalu

    Hi prof. Kelly. Very interesting! Thank you! Have you seen this (deep dive but very short) idmilk.info/cycle/video/mqSGl5nA25aFn9M.html

  • Philip Quinlan
    Philip Quinlan3 hari yang lalu

    Excellent presentation. Thank you.

  • WeberAuto

    WeberAuto

    2 hari yang lalu

    Glad you enjoyed it!

  • Mariusz Zaleski
    Mariusz Zaleski3 hari yang lalu

    Another Wow!. High quality material. Thank you for sharing

  • WeberAuto

    WeberAuto

    3 hari yang lalu

    Glad you enjoyed it

  • Sam Ehlers
    Sam Ehlers3 hari yang lalu

    Thanks so much!

  • WeberAuto

    WeberAuto

    3 hari yang lalu

    You're welcome!

  • Rudolf Wickond
    Rudolf Wickond5 hari yang lalu

    250 km/h ? That's fast enough on the Autobahn ... unless someone is in a hurry.

  • WeberAuto

    WeberAuto

    3 hari yang lalu

    True, Thanks for watching

  • Amundsen
    Amundsen5 hari yang lalu

    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.

  • WeberAuto

    WeberAuto

    5 hari yang lalu

    Thank you very much

  • Greatest Evar
    Greatest Evar6 hari yang lalu

    bet that motor survived the fire just fine.

  • WeberAuto

    WeberAuto

    5 hari yang lalu

    Everything survived that was not plastic or nylon

  • JagiChan
    JagiChan6 hari yang lalu

    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.

  • WeberAuto

    WeberAuto

    6 hari yang lalu

    Thank you very much

  • Learn Progress
    Learn Progress6 hari yang lalu

    Is the lucid are motor better ?

  • WeberAuto

    WeberAuto

    6 hari yang lalu

    I haven’t seen one yet

  • Lucian Mihai
    Lucian Mihai6 hari yang lalu

    Would have been interesting to see the winding and inside of the rotor

  • WeberAuto

    WeberAuto

    5 hari yang lalu

    Thanks for watching

  • Lucian Mihai
    Lucian Mihai6 hari yang lalu

    The bearing technology is that used in the CNC machines spindle.ceramic are the best and can rotate up to 18000 rpm. They limited it under 18000 in order not to have surprises.

  • WeberAuto

    WeberAuto

    6 hari yang lalu

    Thank you for the information

  • T. W.
    T. W.7 hari yang lalu

    You can actually hear the motor and transmission whine if you sit in the rear seats on Tesla Model S P series cars when driving top speed on the autobahn.

  • WeberAuto

    WeberAuto

    7 hari yang lalu

    Awesome!

  • Michael Jennings
    Michael Jennings7 hari yang lalu

    to start, its a rotor not a motor

  • WeberAuto

    WeberAuto

    7 hari yang lalu

    Thanks, yes.

  • niceguy60
    niceguy607 hari yang lalu

    Wait, the Model S has gears ???

  • WeberAuto

    WeberAuto

    7 hari yang lalu

    Four of them per motor

  • Vasile Cretu
    Vasile Cretu9 hari yang lalu

    On the third differential /gear box, there are 8 bolts, not six! ;)

  • WeberAuto

    WeberAuto

    9 hari yang lalu

    Yes, thank you. I was wrong

  • Hank Hall
    Hank Hall9 hari yang lalu

    SKF website (www.skf.com/caribbean/products/rolling-bearings/engineered-products/hybrid-bearings/permissible-speed) says rpm of silicon nitride bearings is limited, their equation gives rpm < 250000/(mean diameter of bearing). Estimating dimensions from your video it appears to me that the 17,900 rpm you mention for the motor is much higher than this limit. Correction: this comment is for grease lubrication.

  • WeberAuto

    WeberAuto

    9 hari yang lalu

    Thanks, I too was confused at first, but then I found the section of the catalog explaining how to safely exceed those limits. Thanks for watching

  • Aaron Schwarz
    Aaron Schwarz9 hari yang lalu

    Thats a very complex cooling system // but keeping electronics & transmission oil cooler makes both last longer //

  • WeberAuto

    WeberAuto

    9 hari yang lalu

    Yes it does

  • Aaron Schwarz
    Aaron Schwarz9 hari yang lalu

    20:16 there is something magical, no rare earths (china controls) permanent magnets (NdFeB etc) // induction motors are cooler than IPM for this specific reason & can be much much less expensive to make //

  • WeberAuto

    WeberAuto

    9 hari yang lalu

    Thanks for watching

  • Huw Williams
    Huw Williams10 hari yang lalu

    On the latest models there's something called the 'Octovalve' to manage the cooling systems as I understand it. It would be interesting to see how that works, because it is apparently unique to Tesla.

  • WeberAuto

    WeberAuto

    10 hari yang lalu

    Yes, coming soon. Thanks for watching

  • your wife's boyfriend
    your wife's boyfriend11 hari yang lalu

    Wow such a simple motor.

  • WeberAuto

    WeberAuto

    10 hari yang lalu

    It sure is! Thanks for watching

  • your wife's boyfriend
    your wife's boyfriend11 hari yang lalu

    Why didn't they just use 2 gears? 😐 why have not just have the differential gear contact the motor gear directly? Its both 78/25 isn't it?

  • your wife's boyfriend

    your wife's boyfriend

    11 hari yang lalu

    @WeberAuto so basically just adjusting gear size will increase acceleration & torque?

  • WeberAuto

    WeberAuto

    11 hari yang lalu

    It would need to have gears with sizes relative to being in first gear on a chain driven bicycle. The gear that turns the wheel would have to be gigantic to get the same gear ratio as we have now with two sets of smaller diameter gears.

  • your wife's boyfriend

    your wife's boyfriend

    11 hari yang lalu

    @WeberAuto how? Why? I don't understand 😕

  • WeberAuto

    WeberAuto

    11 hari yang lalu

    It keeps the gearbox size smaller

  • your wife's boyfriend

    your wife's boyfriend

    11 hari yang lalu

    If less gear = more torque, why not just use 2?

  • Buzz Pedrotti
    Buzz Pedrotti11 hari yang lalu

    Fascinating. Thanks.

  • WeberAuto

    WeberAuto

    11 hari yang lalu

    Glad you enjoyed it

  • Jon-William Murphy
    Jon-William Murphy11 hari yang lalu

    Crazy to me that the stator is welded to the other drive unit housings. I'm thinking about eccentricity, warp and tolerance issues, how did they get that to work? At 39:10, I'd call those pin fins. But buttons is definitely cuter.

  • WeberAuto

    WeberAuto

    11 hari yang lalu

    Good points, pin fins does sound better than buttons, lol, thank you!

  • THE16THPHANTOM
    THE16THPHANTOM12 hari yang lalu

    he uses mixed metric and imperial units... that's kind of a super power(to me). i could never get the feel of size with out translating one to the other.

  • WeberAuto

    WeberAuto

    11 hari yang lalu

    Thanks for watching

  • kyimedical
    kyimedical12 hari yang lalu

    You can call nodule for those aluminium lump to increase surface area of coolant chamber ,

  • WeberAuto

    WeberAuto

    12 hari yang lalu

    Thanks

  • Kimche TV
    Kimche TV12 hari yang lalu

    PREPARE SHIP FOR LUDICROUS SPEED...lmfao i say that every time i drop the hammer...

  • WeberAuto

    WeberAuto

    12 hari yang lalu

    Lol. Thanks for watching

  • A B
    A B13 hari yang lalu

    Damn i wanna watch but his breathing is so disturbing to hear omg.

  • WeberAuto

    WeberAuto

    12 hari yang lalu

    Thanks for the feedback

  • שמעון קופפרמן
    שמעון קופפרמן13 hari yang lalu

    I must mention that I enjoyed every second of your video!! You explain excellently (even though I do not really speak English)... I'm glad you're recording with a microphone at a constant distance from your mouth - you sound great! And the video is really good and clear. Your effort and investment is evident in every detail! What could I have asked for more? Wish you the best! And glad to see such videos. I also sent to some friends.

  • WeberAuto

    WeberAuto

    12 hari yang lalu

    Thank you very much

  • craigslist04
    craigslist0413 hari yang lalu

    John, another well-done presentation with great lighting and camera angles. You and Jack Rickard would have made for an awesome collaboration.

  • WeberAuto

    WeberAuto

    12 hari yang lalu

    Thank you very much

  • Fedupwithfed forever
    Fedupwithfed forever13 hari yang lalu

    So what ......I..... Will say ...as much as I'm against tne Uber lib Elon Musk and his TESLA....I DEFINITELY WILL...praise his company for his Quality that's put into the product his products......!

  • WeberAuto

    WeberAuto

    13 hari yang lalu

    Thanks for watching

  • sarastro60
    sarastro6015 hari yang lalu

    Mr. John Kelly, I am writing to you from Argentina. I thank you for such a didactic explanation of the operation of so many mechanical and electronic-mechanical systems. I would like to know what is the voltage in volts and what capacity in ampere hours of the Tesla battery output which you refer to as high voltage. Thank you very much and best regards.

  • WeberAuto

    WeberAuto

    15 hari yang lalu

    You are very welcome. The fully charged battery is about 400V DC. It is a 90kWh battery, so 90,000 Watts / 400 V = 225 Ah

  • Vita Quasus
    Vita Quasus15 hari yang lalu

    Best explanation of Tesla Motor I have ever seen. Thanks for this, it was informative and succinct.

  • WeberAuto

    WeberAuto

    15 hari yang lalu

    Glad you enjoyed it!

  • TIYOL56
    TIYOL5615 hari yang lalu

    this is goood stuff.

  • WeberAuto

    WeberAuto

    15 hari yang lalu

    Thank you

  • Wolverine Windsor
    Wolverine Windsor15 hari yang lalu

    Magnificent video

  • WeberAuto

    WeberAuto

    15 hari yang lalu

    Thank you

  • Brian Fretwell
    Brian Fretwell16 hari yang lalu

    I keep wondering what performance S performance. All motor perform so I can't get it.

  • WeberAuto

    WeberAuto

    16 hari yang lalu

    Thanks for watching

  • THE ELECTRIC SIDE OF THINGS
    THE ELECTRIC SIDE OF THINGS16 hari yang lalu

    Thank you for such a great video you explained it very well and I enjoyed watching the passion that you have for this electrical vehicle

  • WeberAuto

    WeberAuto

    16 hari yang lalu

    Glad you enjoyed it. Thanks for watching

  • Greg Hoyle
    Greg Hoyle18 hari yang lalu

    Why doesn’t this require any routine maintenance?

  • WeberAuto

    WeberAuto

    15 hari yang lalu

    The magic of marketing

  • Mingyar
    Mingyar18 hari yang lalu

    Tesla are over engineer. Just bought more stocks after watching this video

  • WeberAuto

    WeberAuto

    15 hari yang lalu

    Thanks for watching

  • Old Skeptic
    Old Skeptic18 hari yang lalu

    ... with professional background in Mechanical Engineering and Electronics I would like to thank you for this majestic presentation of the emerging technology... The makers of this car could have done it in a 'flashier' manner, but not with such a careful, detailed approach you have employed here.. Thank you, Sir..

  • WeberAuto

    WeberAuto

    15 hari yang lalu

    Thank you very much

  • tadeusz czachor
    tadeusz czachor19 hari yang lalu

    best videos

  • WeberAuto

    WeberAuto

    19 hari yang lalu

    Thanks for watching

  • Kristian Jonsson
    Kristian Jonsson19 hari yang lalu

    Truck bearing on a passenger car differential!

  • WeberAuto

    WeberAuto

    19 hari yang lalu

    Thanks for watching

  • Chrisso
    Chrisso19 hari yang lalu

    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 🥇🏆

  • WeberAuto

    WeberAuto

    19 hari yang lalu

    Wow, thanks!

  • fawzy moussa
    fawzy moussa19 hari yang lalu

    thank you , you are great,

  • WeberAuto

    WeberAuto

    15 hari yang lalu

    So nice of you

  • Xavier Garonnat
    Xavier Garonnat20 hari yang lalu

    Great video. Is it the same motor or at least same technology on Model 3 ? If yes on which version/year ? Thanks.

  • WeberAuto

    WeberAuto

    20 hari yang lalu

    Not for the rear motor of the model 3, this is different. The front motor of the Model 3 is similar to this one, but much smaller.

  • miguel goizueta
    miguel goizueta20 hari yang lalu

    Whoever designed this, deserved....What ???

  • WeberAuto

    WeberAuto

    20 hari yang lalu

    Thanks for watching

  • Pulkit Jain
    Pulkit Jain20 hari yang lalu

    Great. Now I just have to figure out how to make rest of the car!

  • WeberAuto

    WeberAuto

    20 hari yang lalu

    LOL, yes, me too

  • Richard Wallinger
    Richard Wallinger20 hari yang lalu

    My 1950 Westland Scout helicopter gearbox also used spray lubrication for the gears . I adopted this SECRET lubrication on my radio controlled model turbine helicopter .. Originally I attempted to tun oil bath lubrication which effectively fried the oil and overheated the gears due to hydraulic drag . Great video and super professional presentation .

  • WeberAuto

    WeberAuto

    20 hari yang lalu

    Very interesting, Thanks for watching

  • watchinglosersagain
    watchinglosersagain20 hari yang lalu

    So what he is saying at the beginning is that Tesla's balls are bigger than everyone else's.

  • WeberAuto

    WeberAuto

    20 hari yang lalu

    LOL, Thanks for watching

  • Petter Nygaard Hansen
    Petter Nygaard Hansen21 hari yang lalu

    Very good! My Tesla do 0 to 100km/h on 2,9 sek. No overheat, no vibrations, just 275km/h !

  • WeberAuto

    WeberAuto

    21 hari yang lalu

    Very cool!

  • René V1971
    René V197121 hari yang lalu

    Very interesting and nicely explained!

  • WeberAuto

    WeberAuto

    21 hari yang lalu

    Many thanks!

  • Mike Nelson
    Mike Nelson21 hari yang lalu

    Thank you for this enjoyable video . A clear presentation. I am in the process of expanding my limited knowledge and understanding of how EV's work and are built. This is a bit difficult for an old fart like me , but very, very, interesting and enjoyable journey. So, again, from an old bloke in Australia, thanks.

  • WeberAuto

    WeberAuto

    21 hari yang lalu

    Thanks for watching!

  • Gsacni
    Gsacni21 hari yang lalu

    Thank you for an excellent presentation. Well done! It does however begs the question.... how did the car catch fire..? Was it related to the electronics and/or overheating of something in the motors..?

  • WeberAuto

    WeberAuto

    21 hari yang lalu

    Thanks, I do not know

  • Gary Eisenzimmer
    Gary Eisenzimmer22 hari yang lalu

    Geart presentation.

  • WeberAuto

    WeberAuto

    21 hari yang lalu

    Thank you

  • Girth Quake
    Girth Quake22 hari yang lalu

    I'll be super interested to see the internals of not only the front motors, but also the core differences between the SynR Model 3 motor and the permanent-magnet based S motors. Great to see these layed out like this; I see where the motors needed "refinement" based on secondhand details of their performance limitations and where the coolant would leak prior to those bearings being replaced with those ceramics.

  • WeberAuto

    WeberAuto

    20 hari yang lalu

    No, the AWD model 3 still has an induction motor in the front. The model S still has an induction motor in the rear. I think they use the induction motors for maximum performance and the PM Synchronous reluctance motors for economy. I suspect they can use just one motor during steady state cruising. I am still investigating that theory.

  • Girth Quake

    Girth Quake

    20 hari yang lalu

    @WeberAuto Really? I wonder then if Tesla has completely switched motor production to a SynR type of AC motor; makes sense for economies of scale and parts sharing.

  • WeberAuto

    WeberAuto

    21 hari yang lalu

    Thank you. It is my understanding that the 2019+ Model S front motor and the Model 3 rear motor are the same unit.

  • Not The weeknd • 25 years ago
    Not The weeknd • 25 years ago22 hari yang lalu

    I will always much rather prefer the classic petrol/diesel engines, I can’t get enough of carburetor technology.

  • WeberAuto

    WeberAuto

    22 hari yang lalu

    Thanks for watching

  • Jorge Suarez
    Jorge Suarez22 hari yang lalu

    Good info. Your providing an incredible resource for us techs in the field. What do you think about the GM 2ml70 ECVT transmission?

  • WeberAuto

    WeberAuto

    22 hari yang lalu

    Thank you. It looked on paper, but it was so heavy that it almost made the whole hybrid project useless. They told us in the factory training class in Burbank, CA that they had to add aluminum body panels and improve aerodynamics to get an actual improvement in fuel economy compared to the non-hybrid.

  • Richard S
    Richard S22 hari yang lalu

    Very, >Excellent< explanation of this Model S Performance Motor..

  • WeberAuto

    WeberAuto

    22 hari yang lalu

    Thank you very much

  • MFA
    MFA23 hari yang lalu

    28:28 the ball's expand... can cope with that...there are only 2 of them...

  • WeberAuto

    WeberAuto

    23 hari yang lalu

    Thanks for watching

  • Krzywoprostydezerter
    Krzywoprostydezerter24 hari yang lalu

    They could use ceramic bearings because it is an electric motor, there are no vibrations or any loads from the crank and piston system. They have a higher allowable RPM and generate much lower rolling resistance. The density of the oil may be lower, so it is easier to cool it down. This is a well-engineered engine design. For maximum performance, the reducer also uses ball bearings, lower resistance and lower operating temperature due to lower pressures than tapered roller bearings. A nice thought-out drive ... simply. Great explanation, and great video Professor. Thanks. Greeting from Poland

  • WeberAuto

    WeberAuto

    24 hari yang lalu

    Thank you and thanks for the information

  • FamilyFirstJ
    FamilyFirstJ24 hari yang lalu

    Incredible

  • WeberAuto

    WeberAuto

    24 hari yang lalu

    Thank you

  • Michiel van der Meulen
    Michiel van der Meulen24 hari yang lalu

    It feels strange two gears in the same box have an identical tooth count.

  • WeberAuto

    WeberAuto

    23 hari yang lalu

    @Michiel van der Meulen Yes, we call those "hunting gear ratios." That is very interesting

  • Michiel van der Meulen

    Michiel van der Meulen

    24 hari yang lalu

    @WeberAuto In printing machines one sometimes uses whole number gear ratios to have errors repeat over themselves. But then the consequences for wear and possible vibrations are taken for granted deliberately. Interesting.

  • WeberAuto

    WeberAuto

    24 hari yang lalu

    I thought the same thing. It works well

  • Kim Hansen
    Kim Hansen25 hari yang lalu

    Great video, even for a non-engineer.

  • WeberAuto

    WeberAuto

    25 hari yang lalu

    Thank you

  • CW Science Projects
    CW Science Projects25 hari yang lalu

    I have watched many of Professor Kelly's videos. They are well presented, informative and easy to understand. As a gear design engineer with many years experience on off-road vehicle gears I can make following comments 1. Model S final drive gear face width could be wider than required for durability or torque capacity. When the helix angle is low, more face-width is needed for higher overlap ratio and quietness when running (possible explanation) 2. Size of diff carrier bearings. Many times the half shaft spline size required for it's strength under side gear dictates size of bearings rather than load carrying capacity . Also the special bearing type might have a lower capacity than the standard type. Thus requiring a larger size bearing (possible explanation) Please continue making these videos - Good luck

  • WeberAuto

    WeberAuto

    13 hari yang lalu

    Thank you very much!

  • Bob de Bruin
    Bob de Bruin25 hari yang lalu

    Excellent quality video and content

  • WeberAuto

    WeberAuto

    25 hari yang lalu

    Glad you enjoyed it

  • James LaRoche
    James LaRoche25 hari yang lalu

    OooOoOooo! I clicked this super fast!

  • WeberAuto

    WeberAuto

    25 hari yang lalu

    Thank you for watching

  • Johnny Voo
    Johnny Voo25 hari yang lalu

    Isn't that eight bolts at 6:18

  • WeberAuto

    WeberAuto

    25 hari yang lalu

    @Johnny Voo Thank you

  • Johnny Voo

    Johnny Voo

    25 hari yang lalu

    @WeberAuto OK. Very good video. Thanks.

  • WeberAuto

    WeberAuto

    25 hari yang lalu

    Yes, I was wrong

  • turk 182
    turk 18226 hari yang lalu

    DID you read the small print? You are not aloud to open the gearbox. A Law suit is coming your way so make sure your hole is greased up good because you are in for a roller coaster of a ride.

  • WeberAuto

    WeberAuto

    25 hari yang lalu

    Lol. I guess not

  • Paul Keith
    Paul Keith26 hari yang lalu

    Two in a car, from different households, but not wearing masks. Different rules of course.

  • WeberAuto

    WeberAuto

    26 hari yang lalu

    Thanks for watching

  • Alouis Schäfer
    Alouis Schäfer26 hari yang lalu

    The quality of their Drivetrain Components set the standard for everybody else. I hope they will apply that to commercial vehicles in the future because that is where the focus of the EV World should be. There are some potential issues in my opinion: -The oilpump setup looks very flimsy and cheap compared to the other components. Also the lack of an actual oil filter should be noted down. Sure the magnet will catch most of the worn off metal but pretty much all modern transmissions have a dedicated oil filter so why not Tesla? -Having multiple compartments with different fluids in them is a potential weak point. So I hope Tesla did their homework and used long lasting high quality seals. Failing seals are the Achilles Heel of any vehicle.

  • WeberAuto

    WeberAuto

    26 hari yang lalu

    It is impressive. Thanks for watching

  • Henry Chen
    Henry Chen26 hari yang lalu

    I disabled my adblocker and watched the entire ad for you. Keep it up!

  • WeberAuto

    WeberAuto

    26 hari yang lalu

    Thank you!

  • Wilderness Music
    Wilderness Music26 hari yang lalu

    Maybe we should look at the bearings of the Kawasaki Ninjas of the year 2000. My 250cc Ninja had a redline of 14,000 RPM. 20 year old technology.

  • WeberAuto

    WeberAuto

    26 hari yang lalu

    Amazing technology! Thanks for watching

  • Steve Brewster
    Steve Brewster26 hari yang lalu

    Great detailed explanation for somethiing not many of us electron heads get a chance to pull apart. Thank you for the insights.

  • WeberAuto

    WeberAuto

    26 hari yang lalu

    Thank you very much

  • Darren Hwang
    Darren Hwang26 hari yang lalu

    1.25x speed playback is just right

  • WeberAuto

    WeberAuto

    26 hari yang lalu

    Thanks for watching

  • Brandon Yarber
    Brandon Yarber26 hari yang lalu

    8 bolts

  • WeberAuto

    WeberAuto

    26 hari yang lalu

    Yes, thanks, I was wrong

  • mdimascio
    mdimascio27 hari yang lalu

    Great presentation and detailed analysis!

  • WeberAuto

    WeberAuto

    27 hari yang lalu

    Much appreciated!

  • Sherman Morgan
    Sherman Morgan27 hari yang lalu

    I really enjoyed watching the video. Very well presented. Thanks for making this very informative video.

  • WeberAuto

    WeberAuto

    27 hari yang lalu

    Glad you enjoyed it!

  • D U V A C H
    D U V A C H27 hari yang lalu

    idmilk.info/cycle/video/fnOdZq_Mq7FjmLk.html

  • Dessin animé
    Dessin animé27 hari yang lalu

    Excellent approch for E motors thanks . What does FSD tesla cars work ?

  • WeberAuto

    WeberAuto

    27 hari yang lalu

    Thank you. FSD is not my area of expertise.

  • Drone.Camera.Action
    Drone.Camera.Action27 hari yang lalu

    Would love to see a model 3/Y video to see the difference, especially as this is the future..

  • WeberAuto

    WeberAuto

    27 hari yang lalu

    Coming soon

  • Sanket Devle
    Sanket Devle27 hari yang lalu

    Very nice video with detail information about powertrain.

  • WeberAuto

    WeberAuto

    27 hari yang lalu

    Glad you liked it

  • Ancillary Sword
    Ancillary Sword28 hari yang lalu

    Incredibly informative!

  • WeberAuto

    WeberAuto

    27 hari yang lalu

    Thank you

  • John Henry Holiday
    John Henry Holiday28 hari yang lalu

    Would You buy a Tesla ???? Im tempted and Im not "green"

  • WeberAuto

    WeberAuto

    28 hari yang lalu

    Yes

  • John Henry Holiday
    John Henry Holiday28 hari yang lalu

    Awesome.... Tesla in theory could go forward and reverse at 155 MPH.... that could be really fun....

  • WeberAuto

    WeberAuto

    28 hari yang lalu

    Thank you. It would be fun

  • Garry Perrin
    Garry Perrin28 hari yang lalu

    Super cool, informative video Professor.

  • WeberAuto

    WeberAuto

    28 hari yang lalu

    Thank you!

  • Michael Doherty
    Michael Doherty28 hari yang lalu

    Really good video.......thanks.

  • WeberAuto

    WeberAuto

    28 hari yang lalu

    Thank you very much

  • Robert Bin W
    Robert Bin W28 hari yang lalu

    Professional! Thanks!

  • WeberAuto

    WeberAuto

    28 hari yang lalu

    Thank you

  • Randy Carter
    Randy Carter28 hari yang lalu

    The numbers get truly outrageous when you multiply the torque forward. Take the motor torque and multiply it by 9.344. That's what's going to the wheels. That final gear has to be that big to take that reliably.

  • WeberAuto

    WeberAuto

    28 hari yang lalu

    Very true. Amazing torque

  • Frederick Carpenter
    Frederick Carpenter28 hari yang lalu

    Il

  • WeberAuto

    WeberAuto

    14 hari yang lalu

    Thanks for watching

  • Xiaomieng Ouyang
    Xiaomieng Ouyang28 hari yang lalu

    Excellent video,

  • WeberAuto

    WeberAuto

    28 hari yang lalu

    Glad you liked it!

  • Xiaomieng Ouyang
    Xiaomieng Ouyang28 hari yang lalu

    优秀的视频

  • WeberAuto

    WeberAuto

    28 hari yang lalu

    谢谢

  • TraidMarc Guitars
    TraidMarc Guitars28 hari yang lalu

    125ibs is nothing compared to an LS9 coming in at 571lbs plus drivetrain.

  • WeberAuto

    WeberAuto

    28 hari yang lalu

    True, thanks for watching

  • Jim Stevens
    Jim Stevens28 hari yang lalu

    Great lesson well learnt sir thank you enjoyed every bit !

  • WeberAuto

    WeberAuto

    28 hari yang lalu

    Glad you enjoyed it!

  • Brian Park
    Brian Park28 hari yang lalu

    You mentioned that there were 4 poles in the rotor discussion, but then said you don't know how many poles the stator has. The number of poles in (squirrel cage) induction motor is determined by the stator, not the rotor!

  • WeberAuto

    WeberAuto

    28 hari yang lalu

    @Brian Park That is great information Thank you

  • Brian Park

    Brian Park

    28 hari yang lalu

    ​@WeberAuto Actually, in induction motor with squirrel cage rotor, the rotor can "take on" any number of poles, as dictated by the stator excitation. Some induction motors change base speed by "pole switching" (reversing the polarity of parts of the stator windings, or switching the current between winding sets.) My washing machine gets 3 different speeds that way, without any electronics. A comment about not having permanent magnets: in addition to permitting hotter rotor, it permits "field weakening", which permits the motor to have an unlimited top speed. This makes it easier to have performance with fixed-ratio gearbox.

  • WeberAuto

    WeberAuto

    28 hari yang lalu

    Yes, I was wrong. The stators have the four poles not the rotor

  • tiger fighter greece
    tiger fighter greece28 hari yang lalu

    The elektrical moter is the future in automove

  • Alouis Schäfer

    Alouis Schäfer

    26 hari yang lalu

    The Diesel Engine has a long future ahead of itself. It not even close to being dead. Overall more efficient and cost effective than gasoline. And contrary to popular opinion Diesels are in fact better on emissions than gasoline could ever be. Diesel/Electric hybrids will be the future.

  • WeberAuto

    WeberAuto

    28 hari yang lalu

    Thanks for watching

  • Robert Clark
    Robert Clark28 hari yang lalu

    Ceramic bearings are exactly what you have in that motor. Ceramic is metallic and silicon nitride is a metallic(ceramic) material.

  • WeberAuto

    WeberAuto

    28 hari yang lalu

    Yes, thank you. I was wrong

  • sandyt
    sandyt28 hari yang lalu

    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

  • WeberAuto

    WeberAuto

    28 hari yang lalu

    Thank you very much

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