Tesla Model 3 Torn Down, Hacked and Set On a Dynamometer, Exposing Unusual Tech Details (electrek.co)
Rei writes: With an estimated 8,670 Model 3s delivered, a race is on as competitors and owners work to figure out its limits and explore the tech behind it. Many-time Tesla teardown expert "Ingineerix" has posted a series of videos and discussed his findings on Reddit. Among them: what appears to be the industry's first switched reluctance motor, a massive "smuggling compartment" allocated for a future front-wheel motor, no physical fuses (all solid-state), significant wiring harness length reductions via the use of multiple body controllers, a swappable crash energy absorption system, a liquid-cooled compute unit, and redundant controllers for all safety-related systems. He followed up by posting a screenshot of the car tricked into "factory mode" to reveal its internal specs, including a 1200A max discharge current, 370kW max discharge power, and a 76 kWh pack with 72,5kWh usable. Meanwhile, Munro and Associates tore down a Model 3 for an undisclosed, "not Tesla" client, releasing a video criticizing its build quality and for difficulty in accessing the HV cables in the event of an accident (Munroe's claims were dismissed by Ingineerix). Meanwhile, engineers from German automakers were extremely impressed by what they found during their teardown -- particularly the power electronics system, which they described as "compact, expandable, fully integrated, modular, easily accessible, well-protected, reasonably priced and astonishingly clever in many details." Other owners have been putting their cars on dynamometers to measure their power. Drag Times suffered some skid and measured a conflicting 281 / 327.6 hp with 552 lb-ft torque. Contrarily, Tesla Repair Channel found consistent readings around 250hp when starting from 30mph, but consistently around 390 hp when starting from 10mph. The reason for the discrepancy is not yet clear.
To expand a bit on the motor: it should be clarified that it's not a normal switched reluctance motor (SRM), but rather a PMSRM (permanent magnet switched reluctance motor).
Reluctance is used to some extent in many hybrid EV motors, in the form of "IPM" - interior permanent magnet motors. These are a hybrid of a conventional surface permanent magnet motor (SPM) and a SRM, allowing for high power at high speeds that SPMs don't allow for, as well as reducing magnet sizes (and thus rare earth consumption). By contrast, a PMSRM is a SPM that incorporates permanent magnets into the stator; they don't move and are readily cooled, while sculpting and enhancing the field to increase torque density and help control torque ripple.
It's a new type of motor, combining extreme efficiency, high torque density, and reliability over that offered by an IPM. Getting a PMSRM to work smoothly is an impressive job.
Point of interest. Offering to shoot us might not work so well as an incentive as you might imagine.
Can't wait to see a teardown of the Tesla Roaster, I heard Elon put it somewhere safe though.
Website Just Down For Me? Find out
"The reason for the discrepancy is not yet clear." Uhmmm..... Electric motors display maximum torque at stall
I have to say, that between Tesla and SpaceX Musk seems to truly be amazing for at least one thing - hiring engineering talent.
Sure Tesla has some struggle scaling up producing. But a lot of what they have built is really advanced technically, and generally works quite well.
SpaceX is even more amazing in terms of tech, getting stuff working like vertical landings that seemed like it was going to remain as science fiction, while also seeming to be very reliable tech as far as the rocket industry goes which is its own feat (even in modern times you still see rockets exploding on launch).
I'd have to imagine the Boring Company has hired some equally impressive engineers for mechanical engineering and understanding the science of tunneling...
I wonder if the secret is Musk not creating a huge layer of bureaucracy above engineering on top of a decent amount of funding, so they can really accomplish things.
"There is more worth loving than we have strength to love." - Brian Jay Stanley
APK - I can't wait until he launches his BFR to Mars. Hopefully you and I will be on the same rocket and finally get off of this rock stuck in a gravity well!
So its a engineering marvel in terms of its electrical propulsion. But from what I have read from owners, its a mess when it comes to basics like panel alignment, door closing, interior functions and overall initial quality from a driver/passenger standpoint. For basically a 50k car which is what Tesla is shipping to customers the cheaper model comes later. For 50K I can think of a much more long term reliable car to invest in.
"..a massive smuggling compartment..."
This is illegal in the state of California.
Does that mean that the CDR was left behind here on Earth?
Point of interest. Offering to shoot us might not work so well as an incentive as you might imagine.
So is 1hp 745w or 735w? For fucks sake slashdot, get your shit together.
Are there not still places where secret compartments are illegal?
any DMCA / IP implications here?
Harrison's Postulate - "For every action there is an equal and opposite criticism"
The "impressive" performance figures are meaningless until Tesla cars can lap the world standard Nurburgring Circuit at speed. Regrettably they can't, because the system shuts down due to overheat.
Management of heating issues is the big arcanum, which electric locomotive designers know fully well. Momentary performance is meaningless, but what are the short-term (3 to 5 min) and hourly and indefinite term performance figures? Heating limits those to such an extent that solderings can melt and the usual flow material must be replaced with "silfos", which is good up to 700 degree Celsius.
You may say top speed lapping a circuit is meaningless in real life, but what about towing a two-axle mobile stable with two horses in it, steep uphill? That also puts the Tesla to test. Not just the motors, but also the battery pack and the power electronics (IGBT and computers) must stay warm, not hot in the long term.
I think european car manufactures are reluctant to commit to electric cars because the "old continent" has a vast body of experience with electric locomotives and they know there are many pitfalls. (The world's thoroughly electrified railway, the Valtellina in north Italy was built from 1899 and started ops in 1902, using locos with 3-phase induction motors.) E.g. France with its immense prowess in HST railway electrification (the famous 320km/h TGV) could order Renault / Citroen / Peugeout to jump head-first into electric cars business, but they don't. I don't think price problems can fully explain that, there must be tech traps they can foresee based on a century of AC railway experience.
Statler and Waldorf have moved from their previous job of reviewing live shows https://www.youtube.com/watch?... to reviewing cars at Munro & Associates . .When reviewing the new Tesla Model 3 they "still cannot find the gas cap after 3 days" and hooking two jumper cables to 12V to open a trunk "more complicated than programming my VCR , I never figured that one out either".
Both found that the BMW I3 the "most advance ever" with a electric range of 114 Miles and a 2 cycle generator option for extra range that gives off enough smoke "so you know it is working"
this rock stuck in a gravity well
What. This rock is the gravity well.
... can it lap VIR without going into limp mode? Even once? Model S limped it badly on C&D's Lightning Lap, is that going to work right with a Model 3?
You're not holding it right.
Please give one these to Professor John D. Kelly at Weber State University. He will will strip that Tesla down to its last bolt and show every step of the process. Take a look at https://www.youtube.com/channel/UCtr07mdKhsUwVJjL8Kw_q5A to see his teardowns and all sorts of vehichles.
You're STILL trying the "truncheon in lieu of conversation" ole' boy (via your DUBAI conduit whipslash) - I see you!
* Hey man - a tune from OUR time (actually both, as you are older OLD Toad of "MR. HORNS" scry boy, lo (Beatles for you, & me too (I like Motley Crue's cover though)):
COMIN' DOWN FAST BUT I'M MILES ABOVE YOU!
(It's a song about screwing, but you're only ULTIMATELY screwing yourself hiding my posts... & you KNOW it!)
APK
P.S.=> "Helter Skelter" https://www.youtube.com/watch?v=nBMMCClIgTc/ - & I really don't get it - WHY TRY "Shut me down"? Oh, you & I BOTH know why (lol)... apk
By your count an homeless person begging 10$ a day would be far richer than somebody getting 10$ a day with a house in one third world country. No. Triple no. That 1% comparison must be done SOLELY within the same parity purchasing power. Otherwise you get totally stupid result like your own post shows. A person earning 32k$ is NOT in the global 1%, as the 1% is defined. That person is definitively in the 99%, because in the US that purchasing power parity is such that 32K is *nothing* in many part of the country.
C. Sagan : A demon haunted world:
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visit randi.org
Did not blend.
Work like no one is watching. Dance like you've never been hurt. Make love like you don't need the money.
You forgot Tang, the "breakfast drink!"
"still cannot find the gas cap after 3 days"
Is this the biggest whoosh in the history of whooshes? Please tell me it is! :)
They may hate Tesla, but I'm still eager to find out what Sandy Munro has to say about tearing down the Model 3 when he shows up on Autoline.tv. They are some of the best in the business at estimating costs, and that stuff is fascinating to me.
"You're right," Fisheye says. "I should have set it on 'whip' or 'chop.'"