Tesla Model 3 Motor Tear Down - ALL EV

okay here we are today with Mitch Gregory from Paulie G he's one of our og engineering students and we have an exciting day today with some video we're going to be doing and what you guys can do they mention so what we have here is a multi drive unit on the Left we have the suffering that suspension that are driving in citzen we've remove the drive unit and we're going to completely disassemble it and show you what's inside [Music] okay so we're in front of the motor now you have the entire sub pretty with motor axle suspension everything all in one unit really well packaged pretty impressive isn't it we're look at the drive unit specifically we've got our front right motor mount front left motor mount and then our rear mount fully mounted in three spots around that we have our cooling cables a cooler cooler we've got our high voltage connector there's no battery so this is it's completely dead it runs up to the plug up on the face here down below we have a low voltage connector which has 30 pins on it and then we have some cooling for the inverter so this is the inverter cooling and then we have the oil cooling over here they run in series so the coolant that goes into the oil cooler also goes through the inverter this is what it looks like in the rear subframe and we're gonna remove it and show you what it looks like on its own we've got the drive unit on the stand we fabricated this out of a piece of pipe in some some steel bar or welded up and now we can rotate this motor in different positions and take parts off the first parts we want to take off are the cooler and the front-left mount there's a little clip once you pry that out with a screwdriver you can pop that off there's a couple of clips it's a tough one there's one more down here it's already been removed and then two bolts okay next up we're gonna move remove the front left motor mount next up we're gonna remove the high voltage cabling so gonna close them on here yeah the way to remove these these large connectors is if it pop the red little snap and then this whole arm goes up and releases the latch so that'll pop this off we've got a ten millimeter bolt here next up we're gonna flip the motor over so we can remove the inverter alright so on this side of the motor we have a high voltage connector positive and negative I didn't have a and communications connector this is low voltage over here we have our coolant for the inverter so we're going to remove this plate and expose the cool [Music] here we are so this that's basically a coolant manifold so we remove the coolant manifold and behind that these these little fins are they they work as a heat sink to just take heat away from the inverter kind of interesting there's must be a couple hundred of them the aluminum billet aluminum I believe next up we're gonna remove this high voltage connector now we must remove this plug and the three bolts behind it's really important because it connects the three legs of the inverter to the motor if you don't do that you don't have to pry this case part of you you'll just try stuff so let's remove that so we've already had this out so I probably come out easily if you're doing this for the first time you'll have to try at it there we go we've got 200 rings to keep any dirt or any water or anything from getting into the casing and then meet that we have three ten millimeter bolts that hold do you windings on next up we're going to these twelve pulls to pull the inverter on hold off [Music] [Music] just needs a little lift come right off there we go we have our inverter we're gonna get into this later and I would be right here so after this we're gonna actually run the motor and then we're gonna get back to these bearings on the case hey so I'm gonna use my hand in Battery Park raise it up hoorah so before we remove the motor we have to ruin this speed sensor so we have five volts this just falls right now all right oh so it's kind of like a motor I believe they're looking at the reluctance eyes this triggering wheel it's a triangular triggering wheel pacify these little coils okay now we can move the ten bolts that hold this motor on and we can wiggle it free [Music] nope just lit it with that toxic product and then now it's filling this one yeah okay to remove the rotor I've enlisted the help of Elizabeth so I'm going to pick the the entire motor up and Elizabeth's gonna guide these two sockets on to the back of the rudder and then the weight of the whole assembly is gonna push the rotor up and then we can remove it the magnets that are eating the rotor or holding it to the case yeah and so this side right right oh wow that's never good there you go hey runner here's your stator and then at the bottom there's this little buff blocker that that keeps it tight there go through the rotor alright back of the case in order to split it so it you're setting it inside we need to remove 18 bolts let's do it [Music] before I pull the last bolt I'm going to lay this on the side and I'm going to lift the casing up vertical must easy to remove this casing we remove this bearing plate it has a couple bearings or the input shaft and the secondary shaft and there are seven bowls go casket and it's really important not to lose ezel hey one more bolt wiggle it adds a little tricky but the info chapters try to come with it and then 20 times going to get it then this plastic guard let me [Applause] okay you can move every single component from this drive unit now I'm gonna put it all the team here and tell you a little bit about how it works her looks fantastic the amount of engineering that's going into this in the teardown the Paragon looks awesome you gotta leave it nicely maybe explain what all these parts are now cool so I've arranged it in a way that that I should be able to explain a little bit how it works so to start over here we have our high voltage cable that brings high-voltage DC current to the inverter and inside this inverter we have the bar on here and then the brains over here so this is a look basically the controller and this is what inverts the DC current which comes in here it was into a capacitor bank and then he is switched back and forth to create sinusoidal waves that are then passed to the motor now we have to cool these these triggering MOSFETs and that's what this manifold does so we saw earlier the heatsink and this manifold passes coolant through eating and that's sealed so the circuitry does not get damaged and I can say I mean if it's a AC motor so we have a sinusoidal wave III phase going to this stator and what that does is that the coils create a magnetic field that reacts with the magnets these neodymium magnet from here yeah right so the magnetic field induced by the stator reacts with the magnetic field on the rotor now produces a torque then we get a torque multiplication in this case it's about nine to one multiplication through the gear set and then we have our axles that go on this side and then one on the other that go up to the wheels and allow us to move forward and this kind French we'll hear what it says yeah so actually this is an open differential so one of the wheels were to spin the other one wouldn't quite get the torque indeed but but that's kind of counteracted with the brains in the sense of control unit yeah pretty standard not really a high-performance differential but Tesla makes it work with other controller now that kind of explains how it works but then there's also some some thermal control and oiling that happens in this drive unit that's that's pretty interesting so contrary to popular belief we do have a checker so there's a pretty standard filter oil filter what happens here is we have our oil pump which picks up the bottom from the stuff of this this drive unit and it pumps oil high pressure oil through this little port here which passes into the outside of the filter it passes through the filter going to the inside and then it's pumped through a little tube on the inside and that's racing it looks like just the standard oil filled yeah so probably has a relief valve inside some sort of I hope that prevent it from being plugged up yeah so that comes clean oil up to the cooler so the oil is then immediately cooled after it's pumped we have a heat exchanger where glycol what was the jean fournier g48 coolant pasta - the heat exchanger the oil of the coolant are in separate chambers but they're able to transfer heat between each other so the Coolidge is cooling the oil once it's cool it goes two places one it goes to the stator and the other one it pumps it through this tube and it oils the input shaft and secondary shaft bearings so there's a plate at the bottom here that guides the oil and then eventually it returns back to the sump through this plastic guard set up a little guide and there's one more measurable closest dater there's one more measure there's actually a magnet in the bottom that picks up any fine particles that that come off with with the wear of the parents almost like a regular transmission yeah the fill plug would have one right yeah now there isn't there's an oil filter and when you pull the pump you can drain the oil really easily yeah but there is a fairly traditional oil fill plug and then there's a breather valve on the top so over here we have that breather goes so that's kind of how the oil works and then we have cooling through here and cooling through the inverter okay thanks for watching I missed a great job here one thing is make sure you you hit the like button and also to hit the subscribe button follow us on Instagram YouTube visit our website wwlp.com affordance meant time also call me on instagram electric future mg but we'll see next time great thank you [Music] [Applause] you

Channel: All EV Canada

Views: 565,439

Rating: 4.9388976 out of 5

Keywords: elon musk, Tesla, ALL EV, Electric Vehicle, Electric Future, Model 3, Automotive, Charging, Powerwall, Boring company, Engineering Explained, Transport Evolved, Rich Rebuilds, Mighty Car Mods, inside Tesla motor, inside an electric motor, All EV Canada, All EV, Autogefuel, ID3, What's inside

Id: oVge8I6kxPY

Length: 14min 53sec (893 seconds)

Published: Mon Jun 15 2020

Reddit Comments

[u/trsrogue]

I love Sandy Munro's series on the Model Y tear-down. This video shows a lot more of the actual disassembly process on the drive unit of the Model 3. At the end they give a great explanation of the various component functions, including showing the coolant manifold internals for the invertor which I've not seen before.

[u/duke_of_alinor]

Invaluable series for shops looking to repair.

[u/Face_Disguise]

These guys are in my local city of Halifax! Good crew and very helpful for us local owners when the nearest service centre is about a ten hour drive away...

[u/alle0441]

I've been waiting for a long time to see a teardown of a SR+ battery. At one point Musk mentioned there was some new technology to make it extra efficient. Anyone come across a SR+ battery teardown video?

[u/IAmInTheBasement]

I remember seeing somewhere that the Tesla motors are actually capable of running much more power than the 450HP that the Model 3P is capable, at least for short periods. IIRC the battery was damaged if you tried to drain it faster, or the motor wasn't cooled enough at higher levels than that.

Now, if you had a battery which could be discharged faster, tabless and DBE perhaps... and a motor which had a more substation cooling solution, you could really crank it up and lower the gear ratio. As long as your acceleration is traction limited, that would be the way to go.

I think that'll be part of the alien tech we're going to see on Plaid on the 22nd.

[u/jwardell]

They followed up with a video on the steering rack: https://www.youtube.com/watch?v=vUz1tjGGQU4

[u/bobbyducati]

theres an oil filter?? when did this happen?

[u/Shygar]

Very cool! I think the cameraman was breathing a bit which was distracting, but the video was very informative!

[u/reddit_tl]

Lucid airs motor has crazy power. Really curious if it's mostly due to the high voltage or something else.