On 01/12/2019 01:42 AM, gnuarm.deletethisbit_at_gmail.com wrote:
On Saturday, January 12, 2019 at 1:26:02 AM UTC-5, bitrex wrote:
On 01/12/2019 12:36 AM, gnuarm.deletethisbit_at_gmail.com wrote:
On Saturday, January 12, 2019 at 12:10:01 AM UTC-5, bitrex wrote:
On 01/12/2019 12:03 AM, bitrex wrote:
On 01/11/2019 11:27 PM, gnuarm.deletethisbit_at_gmail.com wrote:
I read that one of the innovations in the PM motors Tesla is using in
the model 3 is the Halbach array they use for the magnets. Seems this
greatly increases the magnetic field on one side of the magnets for
little downside. The trick is being able to glue powerful magnets in
an arrangement where they strongly repel one another. The guy talking
about them said when they first saw one of these they put it in a vice
to hit it with a hammer and the pieces flew apart. Lol
Seems they glue four magnets together to make a single array. Not
sure how these Halbach arrays are arranged in the motor. Seems the
Tesla motor is much more powerful, lighter and cheaper to make than
the motors used in the BMW i3 or the Chevy Bolt. The weights differ
by about 10% but there was a bit larger difference in price with the
Tesla model 3 motor being the top dog across the board.
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- Tesla referral code - https://ts.la/richard11209
Volt and Bolt drivetrain uses ferrite magnets in the secondary motor,
they weigh more and don't perform as good.
To get the performance numbers the Model 3 has at the price they're
likely using neodymium magnets across the board and betting that any
price volatility will be offset by lighter weight and lower overall cost
of the rest of the motor.
AFAIK most of the world's supply comes from China and they've been known
to freeze exports completely from time to time.
That's less of a problem if most Model 3/future Tesla vehicles end up
being primarily built in China which isn't really an option for GM.
Musk is a neoliberal globalist through and through the only reason Tesla
is based in the US at the moment is because that's where the
government/investors who give him money are.
The minute it becomes profitable to pack it all up and ship everything
but the dealerships and a token Tesla North America office off to China
he will. So long, and thanks for all the fish.
Maybe, but there are advantages to making cars in the US. Why do you think the US automakers have been doing it all these years? If they thought they could make more money selling Chinese made autos in the US they would in a heartbeat.
-- Get 6 months of free supercharging
-- Tesla referral code - https://ts.la/richard11209
Chevy and Ford move a lot of product on jingoism; I think many American
buyers would be ambivalent at the least about buying an F-150 or
Silverado made in China. Price it right though and who knows I
definitely don't think they'd sell zero China-150s at the right price.
Can't say I really blame Tesla I suppose, EVs are more abstractly
popular in Asia and have more consistent government support. EV sales
are likely to remain meh in the US for some time and government support
is wildly inconsistent.
I don't believe EV sales will remain "meh" in the US. But for now Tesla is the only real EV company because they are the only one with a charging solution. For GM and the others, it's like trying to sell razors before you can buy blades. But that will come in time. The one report I've read estimated it will take the competition four years to get to where Tesla is today. So they are planning on major new EVs in that time period. What if you designed an EV party and nobody came? You'd have a Bolt!
-+ Get 6 months of free supercharging
-+ Tesla referral code - https://ts.la/richard11209
I see way more Bolts on the road around here than I do Model 3s...
Yeah, I know. No accounting for taste I guess.