Tesla, TSLA & the Investment World: the Perpetual Investors' Roundtable

[StealthP3D]

I came across this photo of a tarped Cybertruck last night. Real or fake, I'm not sure. I don't know much about this YouTube channel, but I believe they were at the Plaid event and do collaborations with Brooks from Drag Times. Is Tesla sending out a few trucks before the next unveiling?

It looks to be in "kneeling" mode, an under-recognized feature that's going to be a real game-changer in terms of loading and unloading speed and ease, especially difficult objects like motorcycles, lawn tractors, refrigerators and other appliances and even things like brush and firewood. Everyone seems to focus on the fact that the Cybertrucks side-wings make side-loading difficult but the truth of the matter is the sides of modern 1/2 ton pickup beds have become so tall that side-loading/unloading is almost never done anyway.

 

[mongo]

As @MP3Mike posted while I was writing this correct, I was wrong. According to the owner's manual they are liquid cooled versions of the PMSR motors.
https://www.tesla.com/sites/default/files/model_s_owners_manual_north_america_en_us.pdf

It also may explain some mileage/efficiency differences.

Relative to the LR, they changed the rear gear ratios (which lines up with needing less torque per motor), so that is probably a little less efficient. Adding more spinny parts also adds drag.

Interesting. I had thought that the induction motor approach ran into backEMF(?) issues at high rpms?

Well, the field strength and phase can get to high RPM, but I'm wrong on the type...

Wouldn't stacked steel laminates be less expensive than a copper rotor? Yes, the magnets cost more but a copper rotor can't be much of a cost savings.

Raw material should be cheaper for steel, but I was thinking cast copper is less production cost than stamping and stacking, especially without magnets, but again, it is not AC induction.

 

[Nocturnal]

It looks to be in "kneeling" mode, an under-recognized feature that's going to be a real game-changer in terms of loading and unloading speed and ease, especially difficult objects like motorcycles, lawn tractors, refrigerators and other appliances and even things like brush and firewood. Everyone seems to focus on the fact that the Cybertrucks side-wings make side-loading difficult but the truth of the matter is the sides of modern 1/2 ton pickup beds have become so tall that basically side-loading/unloading is almost never done anyway.

One of the lame complaints I hear about the CT (usually from white collar internet geeks) is "you can't reach over the bed and lift things out". Oh, the movement that is extremely bad for your back and likely to cause injury?

 

[j6Lpi429@3j]

Just think about what a single Plaid Model S would have done to this race ... he could have ended and ordered a Burger right in time for the Taycan to come in

Roadster owner could have raised cattle, slaughtered one, then cooked the burger before the taycan came in .

 

[Silent Ludicrosy]

As @MP3Mike posted while I was writing this correct, I was wrong. According to the owner's manual they are liquid cooled versions of the PMSR motors.
https://www.tesla.com/sites/default/files/model_s_owners_manual_north_america_en_us.pdf
View attachment 673573

Relative to the LR, they changed the rear gear ratios (which lines up with needing less torque per motor), so that is probably a little less efficient. Adding more spinny parts also adds drag.


Well, the field strength and phase can get to high RPM, but I'm wrong on the type...


Raw material should be cheaper for steel, but I was thinking cast copper is less production cost than stamping and stacking, especially without magnets, but again, it is not AC induction.

The question remains why they’re using copper in a permanent magnet rotor. I suspect it’s to control flux leakage between the magnet bars or hold the cooling fluid, or both. Elon once said plaid powertrain is like “alien technology” so maybe they’ve come up with a hybrid permanent magnet induction rotor that has the best attributes of both over a wide rpm range.

 

[t153]

That's an ICE modified to look like the cybertruck.

Damn, for real? Fooled me...

 

[mongo]

The question remains why they’re using copper in a permanent magnet rotor. I suspect it’s to control flux leakage between the magnet bars or hold the cooling fluid, or both. Elon once said plaid powertrain is like “alien technology” so maybe they’ve come up with a hybrid permanent magnet induction rotor that has the best attributes of both over a wide rpm range.

Given the coaxial liquid cooling, I would guess they use copper cast around the magnets and internal lamination for heat transfer and to make the entire thing liquid tight.
Since the motor is a synchronous design, there is no relative movement between the rotor and the stator generated magnetic field. This means they can have a solid copper layer without the problem of eddy current induced losses that one would get with an induction motor (in retrospect, that should have been a red flag to me).

 

[Silent Ludicrosy]

There’s a new Tesla patent out for crash structure cuboids (thanks TD Ameritrade news).
United States Patent: 11034315

 

[jerry33]

Wouldn't stacked steel laminates be less expensive than a copper rotor? Yes, the magnets cost more but a copper rotor can't be much of a cost savings.

Depends on the quantity of copper. Because copper is a much better conductor than steel, a lot less may be needed. Also copper is more malleable than steel, it might be faster to produce.

 

[StealthP3D]

Audi R8 e-tron electric supercar discontinued after less than 100 sales

Audi has officially ended production on its all-electric R8 e-tron supercar after just a year on the market.

www.motor1.com

Why do they call it "all-electric" in the headline but a "hybrid supercar" in the body of the article?

 

[Artful Dodger]

Roadster owner could have raised cattle, slaughtered one, then cooked the burger before the taycan came in .

Lol, too funny! Sounds like they could have cooked the burger ON the taycan after a few laps...

Cheers!

 

[Nocturnal]

No news today. TSLA is supposed to be up on that.

 

[Pezpunk]

Why do they call it "all-electric" in the headline but a "hybrid supercar" in the body of the article?

because when the article was written in 2016, journalists were even more clueless than they are today.

 

[Big Time]

Öffentlichkeitsbeteiligung für die Fahrzeugfabrik der Firma Tesla

Potsdam – Nachdem die Tesla Manufacturing Brandenburg SE ihr Vorhaben im laufenden Genehmigungsverfahren geändert hatte, hat das Landesamt für Umwelt (LfU) entschieden, dass aufgrund des Umfangs der Änderungen eine erneute Beteiligung der Öffentlichkeit erforderlich wird. Nach Prüfung der am 3...

mluk.brandenburg.de

Translation available
I guess the new changes to Berlin will be posted here June 18th

 

[SmartElectric]

Ford 150, is there a driverless option because the cameras and or radar are installed and a database is being collected? If no driverless system is gamed into the production model, how is it any better than the fossil fuel version of a Ford 150. How long will it take to wash out before there is a driverless version of Ford 150?

Um, Ford's autonomy capability was shown at the reveal, it was one of the top features shown, and here is an article on it.

Ford F-150 Lightning Electric Pickup to Have Level 2 Autonomous Driving - AI Trends

The Ford F-150 Lightning electric pickup will offer level 2 autonomous driving for certain models for a fee later this year via an over-the-air update.

www.aitrends.com

The hands-free capability uses cameras, radar sensors and software to provide a combination of adaptive cruise control, lane centering and speed-sign recognition. It has undergone some 500,000 miles of development testing, Ford emphasized in an announcement in April. The system also has an in-cabin camera that monitors eye gaze and head position to help ensure the driver’s eyes remain on the road.

 

[JustMe]

No news today. TSLA is supposed to be up on that.

Might be under pressure from the inflation report out today - PPI up 0.8% in May

 

[StealthP3D]

One of the lame complaints I hear about the CT (usually from white collar internet geeks) is "you can't reach over the bed and lift things out". Oh, the movement that is extremely bad for your back and likely to cause injury?

True. But I think that kind of truck owner probably doesn't have to worry loading their typical light-weight pink flamingos, inflatable palm trees and Santa lawn decorations.

 

[hobbes]

Tweet at @elonmusk, duh.

Yeah, did, but sometimes he doesn´t promptly read my tweets . So I thought someone here might have a better connection.

 

[Drezil]

No news today. TSLA is supposed to be up on that.

Macros are down.. probably due to halted opening in the UK because of Covid-Delta-Variant that spreads around there & threatens everyone who doesn't have it yet with new lockdowns.

 

[15Peter20]

Given the coaxial liquid cooling, I would guess they use copper cast around the magnets and internal lamination for heat transfer and to make the entire thing liquid tight.
Since the motor is a synchronous design, there is no relative movement between the rotor and the stator generated magnetic field. This means they can have a solid copper layer without the problem of eddy current induced losses that one would get with an induction motor (in retrospect, that should have been a red flag to me).

Don't believe this is true: there will be no slippage, sure, but the rotor flux will still be time-varying, hence generating orthogonal eddy currents, which canonly be stopped by laminating the core.