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 differential to others from a Chevrolet Bolt EV and Nissan Leaf EV
5:40 A Chevrolet Bolt EV differential ring gear with 12-bolts.
6:10 A Nissan Leaf EV differential 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
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 for more information.
Weber State University (WSU) - 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 irmys.info to see the amazing NVH app for vibration diagnosis!
Please consider a donation to the Department of Automotive Technology at Weber State University here: advancement.weber.edu/Automotive

نظر 

  1. cagmito76

    cagmito76

    پیش 14 دقیقه

    Very interesting , thanks.

  2. Bodie Sands

    Bodie Sands

    پیش 28 دقیقه

    I know this may be extremely difficult/expensive, but it would be amazing to also do a teardown of the latest 2021 Model S Plaid (1000-1100+ horsepower, 1300 torque I believe?) when it gets released. Sounds a bit strange, but perhaps we should cross our fingers that somebody crashes one, so that you can buy the motor? Maybe set up a crowdfund to buy a crashed Plaid motor or something haha. Or even better, get hold of a Rimac Concept 2 motor (2000HP) - but that'll probably be even more expensive haha XD

  3. Christopher28fair

    Christopher28fair

    پیش 36 دقیقه

    Thank you, professor.

  4. MICHAEL MATTOS MORAES

    MICHAEL MATTOS MORAES

    پیش ساعت

    can i change the wiring to go from a manual ac to a automatic ac in my kia optima 2014? anybody knows please?

  5. Alemarc Ortega

    Alemarc Ortega

    پیش ساعت

    A talented man, bless you.

  6. Sjef Van Merrienboer

    Sjef Van Merrienboer

    پیش 2 ساعت

    Thank you very much for this explanation. regards from the Netherlands.

  7. John Trussell

    John Trussell

    پیش 4 ساعت

    Tesla builds the best EVs on the planet.

  8. ambread allan

    ambread allan

    پیش 5 ساعت

    If he had long hair he would be doc from back to the future

  9. Jens Hoxmark

    Jens Hoxmark

    پیش 6 ساعت

    Another Excellent video from "WeberAuto" I think Professor Kelly must be one of the best instrutors ever. It's a delight to view & listen to these videos. [Please Also check out www_autotec_no , a very good contribution to instruction , Arendal Norway ]

  10. ABDULLATIF AL ALSHAYKH

    ABDULLATIF AL ALSHAYKH

    پیش 7 ساعت

    Thank you, Mr. John. This explanation is excellent and it helped us a lot

  11. slobberingdog72

    slobberingdog72

    پیش 9 ساعت

    The Nissan Leaf had 8 bolts, professor !!!

  12. 7B Customs

    7B Customs

    پیش 9 ساعت

    Absolutely one of the best explanation videos, on any subject, that I have ever seen. Thank you very much.

  13. Private Ball

    Private Ball

    پیش 10 ساعت

    I just started working as a software engineer at an automotive transmission remanufacturer and this is absolutely perfect! I knew a little and now I know a little more. Thanks for the details and taking time to make these videos.

  14. Robert Craig Perry

    Robert Craig Perry

    پیش 14 ساعت

    It is interesting to me that they are using ball bearings instead of roller bearings, I was taught that roller bearings are stronger, interesting how technology has changed.

  15. Dan Simmons

    Dan Simmons

    پیش 23 ساعت

    Hopefully video platforms like YT will be referenced many, many years from now in perpetuity. BC it will take generations to fix our educational institution from the contempt of teachers and unions who are now showing us who they really are, fakes who hate America. Not all of course but seemingly the majority of the institution.

  16. Godscountry

    Godscountry

    پیش روز

    Cleaning a dirty Model 3 Motor/Drive unit.? Dry ice blasting is the key to cleaning parts without destroying the finishes, coatings, etc. The dry ice pellets turn from a solid to gas upon contacting that’s resting on the surface-without taking off anything that wasn’t originally there. The pellets aren’t removing the surface grime; the pressure of the gas is. The PSI adjustability is pretty impressive. For example, it can remove the ink from a business card without harming the cardstock. It can even remove the “M” on an M&M without damaging the colored coating.

  17. Tavo

    Tavo

    پیش روز

    Next time use paint stripper to help the cleaning process. Or oven cleaner

  18. tarun sharma

    tarun sharma

    پیش روز

    Mosy practical approach to understand this. Thank you so much. Great work

  19. Alicetronics-Jaycar's Platinum Stockist for Central Australia

    Alicetronics-Jaycar's Platinum Stockist for Central Australia

    پیش روز

    So is the difference between large induction motors of the product and 90d besides the software then?..TIA

  20. John Picton

    John Picton

    پیش روز

    Excellent and informative. One point, silicon nitride is, in fact, a ceramic material.

    • John Picton

      John Picton

      پیش روز

      @WeberAuto Appreciate your courtesy. Thanks

    • WeberAuto

      WeberAuto

      پیش روز

      Thank you, yes, I was wrong

  21. Georg Reitterer

    Georg Reitterer

    پیش روز

    try to disassemble the new Model S Plaid +

    • WeberAuto

      WeberAuto

      پیش روز

      I hope to someday

  22. Tony S

    Tony S

    پیش روز

    Loved the video long time awaiting.

    • WeberAuto

      WeberAuto

      پیش روز

      Thank you very much

  23. Jennifer WhiteWolf

    Jennifer WhiteWolf

    پیش روز

    Is that just a crummy open differential ( one wheel don't drive) in the Tesla? That should be a torque splitting or friction plate 'posi-drive' of some sort. So disappointing.

    • WeberAuto

      WeberAuto

      پیش روز

      It uses the vehicle brakes as the friction plates of a Posi-drive. It works very well. Thanks for watching

  24. Stop Israel's Genocide

    Stop Israel's Genocide

    پیش روز

    Primitive overrated US shit.

    • WeberAuto

      WeberAuto

      پیش روز

      Thanks for watching

  25. Daniel Ray Olinick

    Daniel Ray Olinick

    پیش روز

    wow

    • Daniel Ray Olinick

      Daniel Ray Olinick

      پیش روز

      @WeberAuto i am tempted to convert my 1983 F100 short bed truck. it has 300 CID inline six cylinder engine and three speed manual transmission. still thinking of a dc motor low budget low speed short range project.

    • WeberAuto

      WeberAuto

      پیش روز

      Thanks for watching

  26. Nigel Wolfe

    Nigel Wolfe

    پیش روز

    I personally do not like that certain bearing "have no external lubirication/ no external cooling" ....what do I know? Okay granted I dont "know" shit...I'm just saying "I dont LIKE it!" lol....Because IF I personally spend a SHIT TON of money? And driving like I DO drive? (balls to the Fing WALL?) I just do NOT want to get STUCK out of warranty with a LUNCHED car that is now NOT even worth repair....ya know?....IF I buy one of these? i TOTALLY intend to explore it's touted abilities and WILL be BEYOND miffed IF the hype was BS....just saying....ya know?

    • Nigel Wolfe

      Nigel Wolfe

      پیش روز

      BTW I am NOT saying Elon Musk is the type asshole that would claim his product could actually achieve a spec it never COULD while simply betting that only a tiny fraction of buyers would ever even test it??? And just be willing to cover up the BS with warranty payout for the tiny few that DID test it?? ? I would HATE such a person FOREVER and devote myself to running them into the GROUND as scumbag liars.....just saying....

  27. Broke Wrench

    Broke Wrench

    پیش روز

    I wanted to know the gear ratios they use and stayed for the whole video. So much great information, you've earned my subscription

  28. Catalin Alb

    Catalin Alb

    پیش روز

    In Germany we have highways where there is no limit 🙂🤭 still the Tesla's aren't speeding...

  29. Todd Smith

    Todd Smith

    پیش روز

    Thank you so very much for sharing. God Bless you sir.

  30. Gary Bowen

    Gary Bowen

    پیش روز

    Next presentation; Complete Forensic Breakdown of each Rare Earth mineral mined from the ground to the overall creation to this electric vehicle. I tire of the words Self Sustainable used in every persuasive forum we see. Just the use of fire alone cancels out the entire range of sustainable as petroleum coal natural gas can never be eliminated. Myth.

  31. atahghighi

    atahghighi

    پیش روز

    It is great video I found it very educational , appreciate your effort and time in making these videos, just a quick note: if you knew the max frequency of the inverter and the the max motor speed , which we already knew, then you would be ably to find the number of the pole of the motor .

  32. RLH 54

    RLH 54

    پیش روز

    I counted 8 on the leaf.

  33. Ben1 Tao

    Ben1 Tao

    پیش روز

    The uppity crocus relatedly guard because quart regionally pinch into a energetic dock. unsuitable, abnormal germany

  34. rotaryshutter

    rotaryshutter

    پیش روز

    Thanks for sharing these “deep dives.” It’s fascinating to compare and contrast the engineering, design, and manufacturing details implemented for the various EV offerings. Naturally, there are different design goals among the different EVs, but seeing the differences in implementation between this Tesla component and what you’ve shown in the Bolt, for example, speaks to levels of elegance, robustness, and performance that can really help a consumer make a better purchase decision, based on their needs. I think both approaches show sophistication equal to, or superior to the other, each in their own way. I also find it interesting that many of us have seen ICE production evolve over decades, and have grown in our understanding and comfort in repairing/maintaining those vehicles. The relatively rapid rollout of ICE-competitive EVs has suddenly brought vehicles to the market that are familiar in basic functionality (and for some component systems), but that require serious re-education to catch up to the level of, or different technology that’s present. We haven’t “grown up” with EVs like we have with ICEs. Heck, I’m afraid to do much to our Bolt for fear of not following proper deactivation/activation sequences (Thanks to your videos. No, I really mean thanks.). These cars seem as much an electrical power distribution system as automobile. I’m seriously considering your on-line courses and workshop to gain a better understanding, if not actual ability to service/repair EVs, as a tinkerer/owner. Keep up the good work and your positive, “breezy” style. Any references you (or anyone else) can suggest for a deeper, yet understandable, dive into the electrical power systems’ theory and implementation, including inverters, frequency control, regeneration and switching?

  35. James Buckingham

    James Buckingham

    پیش روز

    Is there a comparison of the number of moving parts of ICE and Performance motor? Very informative; amazing and creative engineering!

  36. Nick Kcin

    Nick Kcin

    پیش 2 روز

    The nissan leaf diff has 8 bolts, not 6!

    • Nigel Wolfe

      Nigel Wolfe

      پیش روز

      yes and WHY does he never apologize I wonder??? WTF??

  37. Tyler Smith

    Tyler Smith

    پیش 2 روز

    I love detailed tear-downs and explanations like these! Please keep them coming!

  38. K F

    K F

    پیش 2 روز

    I remember as a young boy being fascinated by a display in the front window of an industrial machinery supply store in the center of Ludwigshafen Germany. This display, by SKF, consisted of a 6-foot high tower that had an elevator that transported a number of steel-bearing balls up to the top of the tower. Each was maybe a little larger than a Ping Pong ball. The balls then dropped off the tower to the floor below onto an angled thick round steel plate, where they then turned 90 degrees, jumped onto another angled steel base, turned 90 degrees again, and landed in a hopper to be transported back up to the top of the tower, in a continuous loop. I am not surprised that those Swedes can build bearings that can pretty much do anything.

  39. Peter Witting

    Peter Witting

    پیش 2 روز

    Lose the mic

    • WeberAuto

      WeberAuto

      پیش 2 روز

      Thanks for watching

  40. androidfreak2014

    androidfreak2014

    پیش 2 روز

    My great mentor taught me of one thing of you like something for example eating piece of bread not just try to like it but to know how it make.

    • WeberAuto

      WeberAuto

      پیش 2 روز

      Good advice

  41. fastacker2

    fastacker2

    پیش 2 روز

    Ludicrous Speed!

    • WeberAuto

      WeberAuto

      پیش 2 روز

      Fun stuff

  42. fastacker2

    fastacker2

    پیش 2 روز

    Turbo encabulator. :)

    • fastacker2

      fastacker2

      پیش روز

      irmys.info/more/Z5qbnIKkl6-qpqQ/fy-lm-h-y.html

    • fastacker2

      fastacker2

      پیش روز

      irmys.info/more/dpdogG-sh6hlcaA/fy-lm-h-y.html

  43. fastacker2

    fastacker2

    پیش 2 روز

    ... monastically spaced bearings to prevent side fumbling and provide increased duractance while reducing sinusoidal depleneration.

    • WeberAuto

      WeberAuto

      پیش 2 روز

      But, of course

  44. belongzable

    belongzable

    پیش 2 روز

    Wow, so explanatory. Thanks boss keep doing a great job

    • WeberAuto

      WeberAuto

      پیش 2 روز

      Thank you

  45. Jim Challender

    Jim Challender

    پیش 2 روز

    Great Tech - I wish I had found your Channel a long time ago - great info. 5 Star Chanel!!

    • WeberAuto

      WeberAuto

      پیش 2 روز

      Thank you very much

  46. derry boye

    derry boye

    پیش 2 روز

    The left canoe hopefully film because ellipse eventually fool in a nosy face. fanatical, raspy geography

  47. kardy12

    kardy12

    پیش 2 روز

    This is fascinating, I’ve seen the teardowns of the Model 3 and Y from Munro Associates, though they obviously keep a fair bit of information for themselves to sell to potential clients, so seeing this for the Model S Performance motor is really great! Liked and subbed.

  48. Дмитрий Емельянов

    Дмитрий Емельянов

    پیش 2 روز

    Does inverter cover has seal O-ring or sealing compоund? On first sight, it looks like there is no water resist. Thanks for video, it is pleasure to watch it, as always

  49. plagapong

    plagapong

    پیش 2 روز

    I was looking this kind of VDO for a week. Finally this one help cleared out my doubts Thanks so much.

  50. Jy Jym

    Jy Jym

    پیش 2 روز

    Bought and driven by suckers.

  51. Francisco

    Francisco

    پیش 2 روز

    what is the model of that car elevator @7:05?

    • Francisco

      Francisco

      پیش 2 روز

      @WeberAuto I meant the elevator, not The car, sorry if I worded it wrong

    • WeberAuto

      WeberAuto

      پیش 2 روز

      2018 Tesla Model S P100D

  52. Bobogto 540i

    Bobogto 540i

    پیش 2 روز

    I don't know how there are still people insisting on EV's being simpler and maintenance free. Please watch this and understand it.

  53. D Mitchell

    D Mitchell

    پیش 2 روز

    How do they vary the speed of the 3 phase AC motor? Does the voltage or current input change? What is the maximum input 3 phase voltage going to the motor from the inverter? Is the 3 phase input motor voltage constant?

    • WeberAuto

      WeberAuto

      پیش 2 روز

      Variable frequency changes the speed. Output voltage is approximately battery voltage. Of course that voltage slowly drops over time

  54. L MVC

    L MVC

    پیش 2 روز

    Fantastic Video and Explanation ( Right at the end of the video - you refer to High Voltage - in electrical engineering that is considered greater than 240Volts - which is doubtful - I think you are meaning High Current capacity cabling rather than High Voltage. I would be interested to know what is the actual voltage being provided to the motor - thank you )

    • WeberAuto

      WeberAuto

      پیش روز

      @L MVC I do not know why it burned

    • L MVC

      L MVC

      پیش 2 روز

      @WeberAuto Thank you - I'm amazed that it is 400 Volts - I was referring to British Wiring Regulations when I said over 240 volts. Have you got any information / best guess about what caused the fire in the vehicle ?

    • WeberAuto

      WeberAuto

      پیش 2 روز

      Thank you very much. The applied voltage is close to 400V with a fully charged battery. The U.S. federal government defines automotive high voltage as anything above 30V AC or 60V DC. It also required orange-colored wire insulation for those voltages. See Federal Motor Vehicle Safety Standard (FMVSS) 305 www.ecfr.gov/cgi-bin/text-idx?SID=a38f3920b0634a03f94e50338cdee23c&mc=true&node=pt49.6.571&rgn=div5#se49.6.571_1305

  55. Vin One

    Vin One

    پیش 2 روز

    Unlike ICE engines, electric motors are simpler and easier to build. This is where Tesla has zero advantage as others will catch up and surpass Tesla, relegating the brand to a footnote in automotive history.

    • WeberAuto

      WeberAuto

      پیش 2 روز

      There is a lot of development in electric motors going on. The motor in this video is old technology compared to the model three motors. To say Tesla has zero advantage is quite bold without evidence. Upon what facts are you basing that statement?

    • Conner McNicholas

      Conner McNicholas

      پیش 2 روز

      Battery technology, however, is complex. This is where the cutting edge breakthroughs are happening, not in the motor.

  56. Deeponion Lovechild

    Deeponion Lovechild

    پیش 2 روز

    So what might be the downside to slightly smaller roller elements (balls) in the high speed bearing? Lesser life span and / or more shaft rattle? Great presentation and reveal of this wonderfully complex powertrain. Weird to get this in a disposable product with a limited life span. Who is going to work on it when it’s ten years old or more. Parts availability? A lot of unique parts and seals!

    • WeberAuto

      WeberAuto

      پیش 2 روز

      Lower life span will cause massive parts failures as they tilt and rub on parts they should not. There are already shops rebuilding these units in California. Search the comments for motor repair.

  57. Arnis

    Arnis

    پیش 2 روز

    Germans get to 250km/h daily.

    • Arnis

      Arnis

      پیش 2 روز

      @WeberAuto I made a post 4 years ago explaining how Model S cooling system works. Here: teslamotorsclub.com/tmc/threads/tesla-thermal-management-system-explanation.88055/ No heat scavanging into the cabin on older versions without Octovalve.

    • WeberAuto

      WeberAuto

      پیش 2 روز

      Awesome!

  58. Robert Lackey

    Robert Lackey

    پیش 2 روز

    That was excellent !

    • WeberAuto

      WeberAuto

      پیش 2 روز

      Thank you

  59. James Stewart

    James Stewart

    پیش 2 روز

    Simplified to perfection 👌i didn't know now i do ! Much appreciated 👍 Uk

    • WeberAuto

      WeberAuto

      پیش 2 روز

      Glad it helped

  60. GABRIELE PARAVANO

    GABRIELE PARAVANO

    پیش 2 روز

    Congratulations the best mechanical explanation I've ever seen !!! Every particular of the motor has been shown in big detail !! Well done !!!

    • WeberAuto

      WeberAuto

      پیش 2 روز

      Thank you very much!

  61. BuckNut87 Brutus

    BuckNut87 Brutus

    پیش 2 روز

    Non-lubricated bearings on the motor shaft at 18,000 rpm?! WOW I am impressed and also leary, lol! Seems later you mentioned these 2 bearings are lubricated internally, had to be!

    • WeberAuto

      WeberAuto

      پیش 2 روز

      I showed a white paste type grease inside the bearing seal, that is all it has. Incredible SKF technology

  62. Anthony Cadiou

    Anthony Cadiou

    پیش 2 روز

    If didnt know better, in my opinion, your seeing alien tec.

    • WeberAuto

      WeberAuto

      پیش 2 روز

      LOL, Maybe!

  63. Joel Cook

    Joel Cook

    پیش 3 روز

    I watched this whole video till the end, before I knew nothing about the technology that goes into these cars. Very professional and educational video!! thank you !! I will subscribe and watch more ! Keep up the good work!!

    • WeberAuto

      WeberAuto

      پیش 2 روز

      Much appreciated!

  64. SyFyJoe

    SyFyJoe

    پیش 3 روز

    Informative content Professor. Thanks for teaching me something today. I think I'll have a look at the Bolt videos now.

    • WeberAuto

      WeberAuto

      پیش 2 روز

      Thank you

  65. mike makuch

    mike makuch

    پیش 3 روز

    Something new for youtube, a really great video, that is interesting and informative to even shade tree mechanics like myself. Thanks for the video.

    • WeberAuto

      WeberAuto

      پیش 2 روز

      Glad you enjoyed it!

  66. Ste Da

    Ste Da

    پیش 3 روز

    0:55 I suggest blasting this smoked pork with dry ice or walnut shells. Saves a lot of time and nerves. :-)

    • Ste Da

      Ste Da

      پیش 2 روز

      @WeberAuto I have to thank you for your wonderful work! "Danke schön" to say it in John Henry Weber's words. Is there a possibility to donate to your YT channel? Best regards from Germany (Some hours south of Weber's home town Hamburg and owning a Model 3 😁)

    • WeberAuto

      WeberAuto

      پیش 2 روز

      Good idea, thank you

  67. MilitantPacifist

    MilitantPacifist

    پیش 3 روز

    Amazing job, absolutely love that this information is becoming readily available to the average idiot like me.

    • WeberAuto

      WeberAuto

      پیش 2 روز

      Thank you

  68. Grumpy ol' Boot

    Grumpy ol' Boot

    پیش 3 روز

    The gear mounted on the electric motor, is usually called a Pinion Gear, which is usually a small spur gear. The Pinion Gear drives the Counter Gear, Which is usually a large spur gear. The Counter Gear is directly connected with another Pinion Gear, which drives another Counter Gear that is connected to the Differential. Most people call the Counter Gear that is connected to the differential a "Differential Gear".

    • Grumpy ol' Boot

      Grumpy ol' Boot

      پیش 2 روز

      @WeberAuto Quite welcome. 😁 btw, most differentials use helical cut gears, ie. "at an angle", but they are technically still pinion and counter gears. Also, "pinion" literally has it's roots in the word "small", though I forget what language it was from - Thus "Big and Small gears". I think there's a wikipedia on it, and everything.

    • WeberAuto

      WeberAuto

      پیش 2 روز

      Thank you for the information

  69. Krishna

    Krishna

    پیش 3 روز

    As a doctor, I really suggest you to workout / somehow reduce your weight. Your obesity is affecting your breathing. As for the video, thank you for sharing a quality video on EV motor.

    • WeberAuto

      WeberAuto

      پیش 2 روز

      Thank you for your kind words

  70. T Legend

    T Legend

    پیش 3 روز

    Hi, I'm still confused about the placement of the rotor with respect to the stator. Are you saying that the rotor is allowed to move up and down (along the axis of rotation) when assembled?

    • WeberAuto

      WeberAuto

      پیش روز

      @T Legend The front motor rotor is spring-loaded and so are the model 3 motor rotors

    • T Legend

      T Legend

      پیش 2 روز

      @WeberAuto WOW, that must be a huge investment on cycle time. I thought they would preload it some how with a spring. Thanks for the updated answer.

    • WeberAuto

      WeberAuto

      پیش 2 روز

      They use selective shims between the outer bearing race and the housing

    • T Legend

      T Legend

      پیش 2 روز

      @WeberAuto So how would they address the tolerances from one unit to the next? On one shaft, there must some play from one bearing shoulder to the other bearing shoulder, right?

    • WeberAuto

      WeberAuto

      پیش 2 روز

      Thank you

  71. James Mathis

    James Mathis

    پیش 3 روز

    I enjoyed every minute of it great trade for our youth to learn certain levels of it should be taught in high school remember back in the day we had pulpwood harvesting auto mechanics brick Masonry and wood works we had quite a bit to pick and choose from we need to get back to it we respected each other and work together those were the great days make America great again

    • WeberAuto

      WeberAuto

      پیش 2 روز

      Glad you enjoyed it, thanks for watching

  72. Dave George

    Dave George

    پیش 3 روز

    I want to see the new PM assisted Tesla rotor please. Another great breakdown of really clean old parts. Glad I'm not paying for specimen clean-up labor and waste disposal. Great student free labor?

    • WeberAuto

      WeberAuto

      پیش 2 روز

      Coming soon. Paid student labor

  73. Michael Heider

    Michael Heider

    پیش 3 روز

    But how many changes did they make in the last 4 years?

    • WeberAuto

      WeberAuto

      پیش 2 روز

      I do not know

  74. Mike Green

    Mike Green

    پیش 3 روز

    I count 8 books on the Leafs gear.

    • WeberAuto

      WeberAuto

      پیش 2 روز

      Yes, I was wrong

  75. Zijie Chen

    Zijie Chen

    پیش 3 روز

    I don’t understand why anyone thumbs down this video. This channel is easily one of the most professional automotive channel on IRmys. Thank you professor for making such high quality educational videos!

    • WeberAuto

      WeberAuto

      پیش 2 روز

      Thank you very much

  76. Cesar Abraham

    Cesar Abraham

    پیش 3 روز

    Wow! you got this down, really enjoyed it, those bearings fail, $$$ and the whole drive unit gets scrapped, i think those bearings are shrinked / press fit,

    • WeberAuto

      WeberAuto

      پیش 2 روز

      Glad you enjoyed it

  77. Steven Hill

    Steven Hill

    پیش 3 روز

    That was fun - 46 minutes just flew by. Looking forward to your video about the Model 3 motor.

    • WeberAuto

      WeberAuto

      پیش 2 روز

      Thank you, coming soon

  78. Diamond Cutter

    Diamond Cutter

    پیش 3 روز

    Excellent post. Very well taught.

    • WeberAuto

      WeberAuto

      پیش 2 روز

      Thank you kindly!

  79. Mel Clifford

    Mel Clifford

    پیش 3 روز

    I worry that Weber might be short of tool cabinets. Sheesh!

    • WeberAuto

      WeberAuto

      پیش 2 روز

      LOL, I do need more! Thanks for noticing

  80. Karolis Abrutis

    Karolis Abrutis

    پیش 3 روز

    who the damn is disliking this video lol

    • WeberAuto

      WeberAuto

      پیش 2 روز

      Thank you

    • WeberAuto

      WeberAuto

      پیش 2 روز

      Yes, I make mistakes and I also correct them in the top pined comment in the comments.Careless accuracy? I suspect you know better than that.

    • TEAMERICA

      TEAMERICA

      پیش 3 روز

      Maybe someone that sees him holding up a Leaf ring gear saying and captioning that it has 6 bolts when you can clearly see at 6:20 that it has 8 bolts. Makes you wonder what other areas he is careless in accuracy.

  81. trumpetmaris

    trumpetmaris

    پیش 3 روز

    Professor, I was really hoping to get details on the Amps and Voltage being switched by the IGBTs. It's pretty impressive. How do they limit the RF interference from the fast switching speeds of such a high current/voltage? Is this why there isn't an AM radio in the Tesla (???). Of course i'm an EECS geek so I was really impressed with this 3 phase motor without a permanent magnet. The electro mechanical aspects are fascinating, since it's where theory meets the road. Getting all the heat out of a 60 lb rotator that is suspended in air spinning at near 20,000 rpm is just crazy. I used to joke with my wife that there is no oil to change in her Tesla, so why do they have periodic maintenance. Now I take it all back.

    • trumpetmaris

      trumpetmaris

      پیش 2 روز

      @WeberAuto thanks

    • WeberAuto

      WeberAuto

      پیش 2 روز

      The voltage is about 384V with a fully charged battery. The wide-open throttle current in ludicrous mode to the rear motor/inverter is close to 1300 Amps and another 600 Amps to the front motor/inverter. It uses a 2000 Amp pyro-technique fuse inside the battery pack to protect the system. All the high voltage cables use shielded wire. It is an amazing motor. The model 3 motor and inverters are even more technologically advanced. Thanks for watching.

  82. DanielinLaTuna

    DanielinLaTuna

    پیش 3 روز

    Fascinating!, thanks for sharing this interesting and informative video

    • WeberAuto

      WeberAuto

      پیش 2 روز

      Glad you enjoyed it!

  83. Pedro Jane

    Pedro Jane

    پیش 3 روز

    The best tutorial video I have ever watched on youtube! Very well made and comprehensible! Thank you Prof. Kelly!

    • WeberAuto

      WeberAuto

      پیش 2 روز

      Wow, thank you!

  84. alejandro vallina collado

    alejandro vallina collado

    پیش 4 روز

    Gran video, los que nos gustan las maquinas siempre aprendemos con ellos. Gracias

    • WeberAuto

      WeberAuto

      پیش 2 روز

      Thank you

  85. Othoap Proto

    Othoap Proto

    پیش 4 روز

    And this is why I dislike this addition to speed. All this over-engineering is a contradiction to an EV. I'm not impressed that you can go 3 times the speed limit.

    • Othoap Proto

      Othoap Proto

      پیش 2 روز

      @WeberAuto I understand that but I still think many people can't handle this type of power and speed. Just look at the number of deaths due to street racing.

    • WeberAuto

      WeberAuto

      پیش 2 روز

      In Germany, 250km/h is legal on some roads. Here is the USA In Utah and Texas you can drive 80 mph on certain freeways. It is a big world out there

  86. Brian Hill

    Brian Hill

    پیش 4 روز

    Great job enjoyed the video 👍🏻

    • WeberAuto

      WeberAuto

      پیش 2 روز

      Glad you enjoyed it

  87. Chris Braid

    Chris Braid

    پیش 4 روز

    A one speed gear reduction unit is correctly called a transmission because it is responsible to transmit the input power to the output drive, shifting gears is optional, it’s a gear transmission rather than chain transmission found in other vehicles but nevertheless a transmission ....

    • WeberAuto

      WeberAuto

      پیش 2 روز

      Thanks for the information. Most EV manufacturers still call it a gear reduction unit. This is possibly to reduce confusion with consumers who may expect it to shift if it is called a transmission.

  88. Pool Bal

    Pool Bal

    پیش 4 روز

    🌈🇺🇳27:30

    • WeberAuto

      WeberAuto

      پیش 2 روز

      Thanks for watching

  89. Edward Schoenman

    Edward Schoenman

    پیش 4 روز

    Where did the fire start, in the motor, in the battery or at it’s connection to the motor assembly, or somewhere else?

    • WeberAuto

      WeberAuto

      پیش 2 روز

      I do not know

  90. Colin Genge

    Colin Genge

    پیش 4 روز

    Why is he laughing at the size of the bearings? Because they stupidly or wisely made them super strong to handle 550 hp from a standing start?

    • WeberAuto

      WeberAuto

      پیش 2 روز

      I was laughing in awe and the super strong large size of the bearings required to handle the incredible torque of the electric motor.

    • Ash C

      Ash C

      پیش 3 روز

      i think because they seem comically large, but he does understand why

  91. Ken Kappler

    Ken Kappler

    پیش 4 روز

    I am puzzled. At about 17:25 you state that the motor bearings do NOT receive external lubrication and then at 26:00 you say the opposite????

    • WeberAuto

      WeberAuto

      پیش 2 روز

      Sorry for the confusion. The two bearings on the motors shaft are not externally lubricated. The motor is connected to a separate shaft with two more bearings that do receive external lubrication from the oil pump. Thanks for watching

  92. John Michael S.

    John Michael S.

    پیش 4 روز

    thank you !

    • WeberAuto

      WeberAuto

      پیش 2 روز

      You're welcome!

  93. Vincent Piccirelli

    Vincent Piccirelli

    پیش 4 روز

    Great Video! thank you for the informative content!

    • WeberAuto

      WeberAuto

      پیش 2 روز

      Glad you enjoyed it!

  94. George Carlson

    George Carlson

    پیش 4 روز

    I think every American engineer ought to be proud of the work accomplished by Tesla. I'm an EE (retired) and I bought a model 3 because of this ground-breaking work. After 18 months, it is still the best car I've ever had. Thanks for your incredibly well done explanation.

    • WeberAuto

      WeberAuto

      پیش 2 روز

      Very cool!

  95. Rusty Wrench2

    Rusty Wrench2

    پیش 4 روز

    Hey. Checkout Rich Rebuilds here on IRmys. He may have more parts and information. Love the video also!!

    • WeberAuto

      WeberAuto

      پیش 2 روز

      Thanks, will do!

  96. McDaniel77

    McDaniel77

    پیش 4 روز

    Best explanation video thus far! Thank your!

    • WeberAuto

      WeberAuto

      پیش 4 روز

      Thank you very much

  97. Johann Bach

    Johann Bach

    پیش 4 روز

    Would LOVE to know the significance of 6 bolts on a ring gear compared to 16 bolts...

    • WeberAuto

      WeberAuto

      پیش 4 روز

      The more bolts it has, the more torque it is designed to handle ( assuming the bolts are the same size). The comparison was meant to show the ring gear was designed to handle a tremendous amount of torque verses other EV’s that are intended to be commuter cars.

  98. Graham Wallmiesterhime

    Graham Wallmiesterhime

    پیش 4 روز

    He got all of this from 2wd RC buggies. Take a look coach

    • Graham Wallmiesterhime

      Graham Wallmiesterhime

      پیش 4 روز

      You think? Elon Musk raced RC cars hence where he got the idea.. You think he created this on his own? 😂

    • WeberAuto

      WeberAuto

      پیش 4 روز

      I think induction motors have been around longer than RC buggies. Thanks for watching

  99. orian cunningham

    orian cunningham

    پیش 4 روز

    Brilliantly informative, thanks!

    • WeberAuto

      WeberAuto

      پیش 4 روز

      Thank you very much

  100. RF monkey

    RF monkey

    پیش 4 روز

    SKF "when pedigree matters and it does !"

    • WeberAuto

      WeberAuto

      پیش 4 روز

      Amazing bearing technology! Thanks for watching

بعد