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.
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.
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
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 fititle.info to see the amazing NVH app for vibration diagnosis!
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
Please consider a donation to the Department of Automotive Technology at Weber State University here: advancement.weber.edu/Automotive


  1. Amundsen

    Amundsen3 tuntia sitten

    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.

  2. WeberAuto

    WeberAutoTunti sitten

    Thank you very much

  3. Greatest Evar

    Greatest Evar12 tuntia sitten

    bet that motor survived the fire just fine.

  4. JagiChan

    JagiChan12 tuntia sitten

    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.

  5. WeberAuto

    WeberAuto3 tuntia sitten

    Thank you very much

  6. Learn Progress

    Learn Progress13 tuntia sitten

    Is the lucid are motor better ?

  7. WeberAuto

    WeberAuto3 tuntia sitten

    I haven’t seen one yet

  8. Lucian Mihai

    Lucian Mihai15 tuntia sitten

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

  9. Lucian Mihai

    Lucian Mihai15 tuntia sitten

    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.

  10. WeberAuto

    WeberAuto3 tuntia sitten

    Thank you for the information

  11. T. W.

    T. W.Päivä sitten

    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.

  12. WeberAuto

    WeberAutoPäivä sitten


  13. Michael Jennings

    Michael JenningsPäivä sitten

    to start, its a rotor not a motor

  14. WeberAuto

    WeberAutoPäivä sitten

    Thanks, yes.

  15. niceguy60

    niceguy60Päivä sitten

    Wait, the Model S has gears ???

  16. WeberAuto

    WeberAutoPäivä sitten

    Four of them per motor

  17. Vasile Cretu

    Vasile Cretu3 päivää sitten

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

  18. WeberAuto

    WeberAuto3 päivää sitten

    Yes, thank you. I was wrong

  19. Hank Hall

    Hank Hall3 päivää sitten

    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.

  20. WeberAuto

    WeberAuto3 päivää sitten

    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

  21. Aaron Schwarz

    Aaron Schwarz3 päivää sitten

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

  22. WeberAuto

    WeberAuto3 päivää sitten

    Yes it does

  23. Aaron Schwarz

    Aaron Schwarz3 päivää sitten

    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 //

  24. WeberAuto

    WeberAuto3 päivää sitten

    Thanks for watching

  25. Huw Williams

    Huw Williams4 päivää sitten

    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.

  26. WeberAuto

    WeberAuto4 päivää sitten

    Yes, coming soon. Thanks for watching

  27. your wife's boyfriend

    your wife's boyfriend5 päivää sitten

    Wow such a simple motor.

  28. WeberAuto

    WeberAuto4 päivää sitten

    It sure is! Thanks for watching

  29. your wife's boyfriend

    your wife's boyfriend5 päivää sitten

    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?

  30. your wife's boyfriend

    your wife's boyfriend5 päivää sitten

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

  31. WeberAuto

    WeberAuto5 päivää sitten

    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.

  32. your wife's boyfriend

    your wife's boyfriend5 päivää sitten

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

  33. WeberAuto

    WeberAuto5 päivää sitten

    It keeps the gearbox size smaller

  34. your wife's boyfriend

    your wife's boyfriend5 päivää sitten

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

  35. Buzz Pedrotti

    Buzz Pedrotti5 päivää sitten

    Fascinating. Thanks.

  36. WeberAuto

    WeberAuto5 päivää sitten

    Glad you enjoyed it

  37. Jon-William Murphy

    Jon-William Murphy5 päivää sitten

    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.

  38. WeberAuto

    WeberAuto5 päivää sitten

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


    THE16THPHANTOM6 päivää sitten

    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.

  40. WeberAuto

    WeberAuto6 päivää sitten

    Thanks for watching

  41. kyimedical

    kyimedical6 päivää sitten

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

  42. WeberAuto

    WeberAuto6 päivää sitten


  43. Kimche TV

    Kimche TV7 päivää sitten

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

  44. WeberAuto

    WeberAuto6 päivää sitten

    Lol. Thanks for watching

  45. A B

    A B7 päivää sitten

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

  46. WeberAuto

    WeberAuto6 päivää sitten

    Thanks for the feedback

  47. שמעון קופפרמן

    שמעון קופפרמן7 päivää sitten

    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.

  48. WeberAuto

    WeberAuto7 päivää sitten

    Thank you very much

  49. craigslist04

    craigslist047 päivää sitten

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

  50. WeberAuto

    WeberAuto7 päivää sitten

    Thank you very much

  51. Fedupwithfed forever

    Fedupwithfed forever8 päivää sitten

    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......!

  52. WeberAuto

    WeberAuto7 päivää sitten

    Thanks for watching

  53. sarastro60

    sarastro609 päivää sitten

    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.

  54. WeberAuto

    WeberAuto9 päivää sitten

    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

  55. Vita Quasus

    Vita Quasus9 päivää sitten

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

  56. WeberAuto

    WeberAuto9 päivää sitten

    Glad you enjoyed it!

  57. TIYOL56

    TIYOL569 päivää sitten

    this is goood stuff.

  58. WeberAuto

    WeberAuto9 päivää sitten

    Thank you

  59. Wolverine Windsor

    Wolverine Windsor9 päivää sitten

    Magnificent video

  60. WeberAuto

    WeberAuto9 päivää sitten

    Thank you

  61. Brian Fretwell

    Brian Fretwell10 päivää sitten

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

  62. WeberAuto

    WeberAuto10 päivää sitten

    Thanks for watching


    THE ELECTRIC SIDE OF THINGS10 päivää sitten

    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

  64. WeberAuto

    WeberAuto10 päivää sitten

    Glad you enjoyed it. Thanks for watching

  65. Greg Hoyle

    Greg Hoyle12 päivää sitten

    Why doesn’t this require any routine maintenance?

  66. WeberAuto

    WeberAuto10 päivää sitten

    The magic of marketing

  67. Mingyar

    Mingyar13 päivää sitten

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

  68. WeberAuto

    WeberAuto9 päivää sitten

    Thanks for watching

  69. Old Skeptic

    Old Skeptic13 päivää sitten

    ... 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..

  70. WeberAuto

    WeberAuto9 päivää sitten

    Thank you very much

  71. tadeusz czachor

    tadeusz czachor13 päivää sitten

    best videos

  72. WeberAuto

    WeberAuto13 päivää sitten

    Thanks for watching

  73. Kristian Jonsson

    Kristian Jonsson13 päivää sitten

    Truck bearing on a passenger car differential!

  74. WeberAuto

    WeberAuto13 päivää sitten

    Thanks for watching

  75. Chrisso

    Chrisso13 päivää sitten

    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 🥇🏆

  76. WeberAuto

    WeberAuto13 päivää sitten

    Wow, thanks!

  77. fawzy moussa

    fawzy moussa13 päivää sitten

    thank you , you are great,

  78. WeberAuto

    WeberAuto9 päivää sitten

    So nice of you

  79. Xavier Garonnat

    Xavier Garonnat14 päivää sitten

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

  80. WeberAuto

    WeberAuto14 päivää sitten

    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.

  81. miguel goizueta

    miguel goizueta14 päivää sitten

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

  82. WeberAuto

    WeberAuto14 päivää sitten

    Thanks for watching

  83. Pulkit Jain

    Pulkit Jain14 päivää sitten

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

  84. WeberAuto

    WeberAuto14 päivää sitten

    LOL, yes, me too

  85. Richard Wallinger

    Richard Wallinger14 päivää sitten

    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 .

  86. WeberAuto

    WeberAuto14 päivää sitten

    Very interesting, Thanks for watching

  87. watchinglosersagain

    watchinglosersagain14 päivää sitten

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

  88. WeberAuto

    WeberAuto14 päivää sitten

    LOL, Thanks for watching

  89. Petter Nygaard Hansen

    Petter Nygaard Hansen15 päivää sitten

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

  90. WeberAuto

    WeberAuto15 päivää sitten

    Very cool!

  91. René V1971

    René V197115 päivää sitten

    Very interesting and nicely explained!

  92. WeberAuto

    WeberAuto15 päivää sitten

    Many thanks!

  93. Mike Nelson

    Mike Nelson15 päivää sitten

    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.

  94. WeberAuto

    WeberAuto15 päivää sitten

    Thanks for watching!

  95. Gsacni

    Gsacni16 päivää sitten

    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..?

  96. WeberAuto

    WeberAuto15 päivää sitten

    Thanks, I do not know

  97. Gary Eisenzimmer

    Gary Eisenzimmer16 päivää sitten

    Geart presentation.

  98. WeberAuto

    WeberAuto15 päivää sitten

    Thank you

  99. Girth Quake

    Girth Quake16 päivää sitten

    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.

  100. WeberAuto

    WeberAuto15 päivää sitten

    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.

  101. Girth Quake

    Girth Quake15 päivää sitten

    @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.

  102. WeberAuto

    WeberAuto15 päivää sitten

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

  103. Not The weeknd • 25 years ago

    Not The weeknd • 25 years ago16 päivää sitten

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

  104. WeberAuto

    WeberAuto16 päivää sitten

    Thanks for watching

  105. Jorge Suarez

    Jorge Suarez16 päivää sitten

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

  106. WeberAuto

    WeberAuto16 päivää sitten

    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.

  107. Richard S

    Richard S17 päivää sitten

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

  108. WeberAuto

    WeberAuto17 päivää sitten

    Thank you very much

  109. MFA

    MFA17 päivää sitten

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

  110. WeberAuto

    WeberAuto17 päivää sitten

    Thanks for watching

  111. Krzywoprostydezerter

    Krzywoprostydezerter18 päivää sitten

    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

  112. WeberAuto

    WeberAuto18 päivää sitten

    Thank you and thanks for the information

  113. FamilyFirstJ

    FamilyFirstJ18 päivää sitten


  114. WeberAuto

    WeberAuto18 päivää sitten

    Thank you

  115. Michiel van der Meulen

    Michiel van der Meulen18 päivää sitten

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

  116. WeberAuto

    WeberAuto17 päivää sitten

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

  117. Michiel van der Meulen

    Michiel van der Meulen18 päivää sitten

    @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.

  118. WeberAuto

    WeberAuto18 päivää sitten

    I thought the same thing. It works well

  119. Kim Hansen

    Kim Hansen19 päivää sitten

    Great video, even for a non-engineer.

  120. WeberAuto

    WeberAuto19 päivää sitten

    Thank you

  121. CW Science Projects

    CW Science Projects19 päivää sitten

    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

  122. WeberAuto

    WeberAuto7 päivää sitten

    Thank you very much!

  123. Bob de Bruin

    Bob de Bruin19 päivää sitten

    Excellent quality video and content

  124. WeberAuto

    WeberAuto19 päivää sitten

    Glad you enjoyed it

  125. James LaRoche

    James LaRoche19 päivää sitten

    OooOoOooo! I clicked this super fast!

  126. WeberAuto

    WeberAuto19 päivää sitten

    Thank you for watching

  127. Johnny Voo

    Johnny Voo20 päivää sitten

    Isn't that eight bolts at 6:18

  128. WeberAuto

    WeberAuto19 päivää sitten

    @Johnny Voo Thank you

  129. Johnny Voo

    Johnny Voo19 päivää sitten

    @WeberAuto OK. Very good video. Thanks.

  130. WeberAuto

    WeberAuto20 päivää sitten

    Yes, I was wrong

  131. turk 182

    turk 18220 päivää sitten

    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.

  132. WeberAuto

    WeberAuto20 päivää sitten

    Lol. I guess not

  133. Paul Keith

    Paul Keith20 päivää sitten

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

  134. WeberAuto

    WeberAuto20 päivää sitten

    Thanks for watching

  135. Alouis Schäfer

    Alouis Schäfer20 päivää sitten

    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.

  136. WeberAuto

    WeberAuto20 päivää sitten

    It is impressive. Thanks for watching

  137. Henry Chen

    Henry Chen20 päivää sitten

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

  138. WeberAuto

    WeberAuto20 päivää sitten

    Thank you!

  139. Wilderness Music

    Wilderness Music20 päivää sitten

    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.

  140. WeberAuto

    WeberAuto20 päivää sitten

    Amazing technology! Thanks for watching

  141. Steve Brewster

    Steve Brewster21 päivä sitten

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

  142. WeberAuto

    WeberAuto20 päivää sitten

    Thank you very much

  143. Darren Hwang

    Darren Hwang21 päivä sitten

    1.25x speed playback is just right

  144. WeberAuto

    WeberAuto21 päivä sitten

    Thanks for watching

  145. Brandon Yarber

    Brandon Yarber21 päivä sitten

    8 bolts

  146. WeberAuto

    WeberAuto21 päivä sitten

    Yes, thanks, I was wrong

  147. mdimascio

    mdimascio21 päivä sitten

    Great presentation and detailed analysis!

  148. WeberAuto

    WeberAuto21 päivä sitten

    Much appreciated!

  149. Sherman Morgan

    Sherman Morgan21 päivä sitten

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

  150. WeberAuto

    WeberAuto21 päivä sitten

    Glad you enjoyed it!

  151. D U V A C H

    D U V A C H21 päivä sitten


  152. Dessin animé

    Dessin animé21 päivä sitten

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

  153. WeberAuto

    WeberAuto21 päivä sitten

    Thank you. FSD is not my area of expertise.

  154. Drone.Camera.Action

    Drone.Camera.Action21 päivä sitten

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

  155. WeberAuto

    WeberAuto21 päivä sitten

    Coming soon

  156. Sanket Devle

    Sanket Devle21 päivä sitten

    Very nice video with detail information about powertrain.

  157. WeberAuto

    WeberAuto21 päivä sitten

    Glad you liked it

  158. Ancillary Sword

    Ancillary Sword22 päivää sitten

    Incredibly informative!

  159. WeberAuto

    WeberAuto22 päivää sitten

    Thank you

  160. John Henry Holiday

    John Henry Holiday22 päivää sitten

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

  161. WeberAuto

    WeberAuto22 päivää sitten


  162. John Henry Holiday

    John Henry Holiday22 päivää sitten

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

  163. WeberAuto

    WeberAuto22 päivää sitten

    Thank you. It would be fun

  164. Garry Perrin

    Garry Perrin22 päivää sitten

    Super cool, informative video Professor.

  165. WeberAuto

    WeberAuto22 päivää sitten

    Thank you!

  166. Michael Doherty

    Michael Doherty22 päivää sitten

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

  167. WeberAuto

    WeberAuto22 päivää sitten

    Thank you very much

  168. Robert Bin W

    Robert Bin W22 päivää sitten

    Professional! Thanks!

  169. WeberAuto

    WeberAuto22 päivää sitten

    Thank you

  170. Randy Carter

    Randy Carter22 päivää sitten

    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.

  171. WeberAuto

    WeberAuto22 päivää sitten

    Very true. Amazing torque

  172. Frederick Carpenter

    Frederick Carpenter22 päivää sitten


  173. WeberAuto

    WeberAuto8 päivää sitten

    Thanks for watching

  174. Xiaomieng Ouyang

    Xiaomieng Ouyang22 päivää sitten

    Excellent video,

  175. WeberAuto

    WeberAuto22 päivää sitten

    Glad you liked it!

  176. Xiaomieng Ouyang

    Xiaomieng Ouyang22 päivää sitten


  177. WeberAuto

    WeberAuto22 päivää sitten


  178. TraidMarc Guitars

    TraidMarc Guitars22 päivää sitten

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

  179. WeberAuto

    WeberAuto22 päivää sitten

    True, thanks for watching

  180. Jim Stevens

    Jim Stevens22 päivää sitten

    Great lesson well learnt sir thank you enjoyed every bit !

  181. WeberAuto

    WeberAuto22 päivää sitten

    Glad you enjoyed it!

  182. Brian Park

    Brian Park22 päivää sitten

    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!

  183. WeberAuto

    WeberAuto22 päivää sitten

    @Brian Park That is great information Thank you

  184. Brian Park

    Brian Park22 päivää sitten

    ​@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.

  185. WeberAuto

    WeberAuto22 päivää sitten

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

  186. tiger fighter greece

    tiger fighter greece22 päivää sitten

    The elektrical moter is the future in automove

  187. Alouis Schäfer

    Alouis Schäfer20 päivää sitten

    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.

  188. WeberAuto

    WeberAuto22 päivää sitten

    Thanks for watching

  189. Robert Clark

    Robert Clark22 päivää sitten

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

  190. WeberAuto

    WeberAuto22 päivää sitten

    Yes, thank you. I was wrong

  191. sandyt

    sandyt23 päivää sitten

    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

  192. WeberAuto

    WeberAuto23 päivää sitten

    Thank you very much

  193. MrViking

    MrViking23 päivää sitten

    This was VERY interesting. I learned a lot 😊👌

  194. WeberAuto

    WeberAuto23 päivää sitten

    Thank you

  195. Stewey

    Stewey23 päivää sitten

    The Leaf appears to have 8 bolts, not 6

  196. WeberAuto

    WeberAuto23 päivää sitten

    Yes, thanks, I was wrong

  197. 1 2

    1 223 päivää sitten

    Is it over kill or do you need it that big of a diff on it. Hmm bigger is better.

  198. WeberAuto

    WeberAuto23 päivää sitten

    You need that big of a differential with that much to torque.

  199. Rajesh B

    Rajesh B23 päivää sitten

    Wow excellent 👌👌👌

  200. WeberAuto

    WeberAuto23 päivää sitten

    Thank you

  201. Tony Debreceni

    Tony Debreceni23 päivää sitten

    Thank you so much

  202. WeberAuto

    WeberAuto23 päivää sitten

    You're most welcome

  203. jonce81

    jonce8123 päivää sitten

    $1m dollar equipment, $2 mic?

  204. WeberAuto

    WeberAuto20 päivää sitten

    @Alouis Schäfer Thank you

  205. Alouis Schäfer

    Alouis Schäfer20 päivää sitten

    @WeberAuto Audio is perfect!

  206. WeberAuto

    WeberAuto23 päivää sitten

    Are you complaining about the audio quality?

  207. Stephen Cox

    Stephen Cox23 päivää sitten

    Yah very good vide. Appreciate the information.

  208. WeberAuto

    WeberAuto23 päivää sitten

    Thank you

  209. Aronne Camilleri

    Aronne Camilleri24 päivää sitten

    Excellent video to understand the basics of an EV.

  210. WeberAuto

    WeberAuto24 päivää sitten

    Thank you

  211. Robert Hopkins

    Robert Hopkins24 päivää sitten

    Thank you for explaing so clearly an excellent video

  212. WeberAuto

    WeberAuto24 päivää sitten

    Thank you very much