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Guest

Sat Jan 12, 2019 5:45 am   



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.

Rick C.

- Get 6 months of free supercharging
- Tesla referral code - https://ts.la/richard11209

Carl
Guest

Sat Jan 12, 2019 5:45 am   



wrote in message
news:85b4fd45-9b2a-4d41-a86a-56df8ec5f806_at_googlegroups.com...
Quote:

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.

Rick C.

- Get 6 months of free supercharging
- Tesla referral code - https://ts.la/richard11209


My favorite neodymium magnet seller is K&J Magnetics. They put out a brief
newsletter each month, usually with a couple of short videos showing some
detail of magnets and their applications. Anyway, they had a little article
on linear Halbach arrays which shows the basics of refrigerator magnets with
a strong field on one side and little field on the other, and a bit on motor
magnets (and in a second installment).
https://www.kjmagnetics.com/blog.asp?p=halbach-arrays

--
Regards,
Carl Ijames

bitrex
Guest

Sat Jan 12, 2019 6:45 am   



On 01/12/2019 12:03 AM, bitrex wrote:
Quote:
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.

   Rick C.

   - Get 6 months of free supercharging
   - 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.

bitrex
Guest

Sat Jan 12, 2019 6:45 am   



On 01/11/2019 11:27 PM, gnuarm.deletethisbit_at_gmail.com wrote:
Quote:
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.

Rick C.

- Get 6 months of free supercharging
- 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.


Guest

Sat Jan 12, 2019 6:45 am   



On Saturday, January 12, 2019 at 12:03:51 AM UTC-5, bitrex wrote:
Quote:
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.

Rick C.

- Get 6 months of free supercharging
- 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.


Not sure why you say this is not an option for GM. This is exactly what they have said they are going to do, make their high volume EVs in China to sell in China before they address the US market. In fact the US market is after Europe too.

Rick C.

+ Get 6 months of free supercharging
+ Tesla referral code - https://ts.la/richard11209


Guest

Sat Jan 12, 2019 6:45 am   



On Saturday, January 12, 2019 at 12:10:01 AM UTC-5, bitrex wrote:
Quote:
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.

   Rick C.

   - Get 6 months of free supercharging
   - 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.

Rick C.

-- Get 6 months of free supercharging
-- Tesla referral code - https://ts.la/richard11209


Guest

Sat Jan 12, 2019 7:45 am   



On Saturday, January 12, 2019 at 1:26:02 AM UTC-5, bitrex wrote:
Quote:
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.

   Rick C.

   - Get 6 months of free supercharging
   - 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.

Rick C.

-- 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!

Rick C.

-+ Get 6 months of free supercharging
-+ Tesla referral code - https://ts.la/richard11209


Guest

Sat Jan 12, 2019 7:45 am   



On Friday, January 11, 2019 at 11:27:41 PM UTC-5, gnuarm.del...@gmail.com wrote:
Quote:
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.

Rick C.

- Get 6 months of free supercharging
- Tesla referral code - https://ts.la/richard11209


This video shows the Tesla 3's motor guts & magnets, starting at 3:12.
https://www.youtube.com/watch?v=Lj1a8rdX6DU

Cheers,
James Arthur

bitrex
Guest

Sat Jan 12, 2019 7:45 am   



On 01/12/2019 01:25 AM, bitrex wrote:

Quote:
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.

   Rick C.

   -- 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.


I would very much prefer to buy a Volt made in Detroit but if the
Chinese were to make a clone with a few improvements like say charge
twice as fast and price it at $25k, if it seemed at least no less
well-made than the US variant I don't think I'd turn it down.

bitrex
Guest

Sat Jan 12, 2019 7:45 am   



On 01/12/2019 12:36 AM, gnuarm.deletethisbit_at_gmail.com wrote:
Quote:
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.

   Rick C.

   - Get 6 months of free supercharging
   - 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.

Rick C.

-- 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.

bitrex
Guest

Sat Jan 12, 2019 8:45 am   



On 01/12/2019 02:22 AM, gnuarm.deletethisbit_at_gmail.com wrote:
Quote:
On Saturday, January 12, 2019 at 1:54:40 AM UTC-5, bitrex wrote:
On 01/12/2019 01:45 AM, gnuarm.deletethisbit_at_gmail.com wrote:
On Saturday, January 12, 2019 at 1:32:01 AM UTC-5, bitrex wrote:
On 01/12/2019 01:25 AM, bitrex wrote:

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.

   Rick C.

   -- 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.

I would very much prefer to buy a Volt made in Detroit but if the
Chinese were to make a clone with a few improvements like say charge
twice as fast and price it at $25k, if it seemed at least no less
well-made than the US variant I don't think I'd turn it down.

Yes, you might prefer a Volt, but not many others agree with you most notably GM.

Charging faster is not really an option until other batteries are available. Or are you talking about the slow charging of the Volt?? That option is off the table. Hybrids are not in the future of EV driving.

Rick C.

+- Get 6 months of free supercharging
+- Tesla referral code - https://ts.la/richard11209


No reason the battery technology it has now can't charge somewhat
faster, the Leaf's Level 2 charger electronics can draw 6.6 kW. The Volt
tops out at around 3.8 kW they cheeped out on the charger electronics a
bit to hit a price have to save money for the gas-burner! Someone may
design an aftermarket mod/hack at some point if it's feasible, dunno.

Sorry, I thought you were talking about real EVs. In general the limitation on charging is presently about 1C or in other words, 1 hour. Cars that have lower charge rates are not likely limited by the battery, but the chargers. 3.8 kW is about 15 amps at 240 volts. Not sure why it would be that low. The battery is good for 50 miles? That would be around 10-15 kWh which should charge at about 10 kW rate or better, no? Don't know why the 3.8 kW rate...

Rick C.

++ Get 6 months of free supercharging
++ Tesla referral code - https://ts.la/richard11209


Probably because to go up on the charging rate from 3.8kW they'd have
had to step up to the next beefier size of MOSFETs, beefier cable,
different charge controller, etc. which would've added $200 to the parts
cost and $1000 to the sale price


Guest

Sat Jan 12, 2019 8:45 am   



On Saturday, January 12, 2019 at 1:32:01 AM UTC-5, bitrex wrote:
Quote:
On 01/12/2019 01:25 AM, bitrex wrote:

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.

   Rick C.

   -- 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.

I would very much prefer to buy a Volt made in Detroit but if the
Chinese were to make a clone with a few improvements like say charge
twice as fast and price it at $25k, if it seemed at least no less
well-made than the US variant I don't think I'd turn it down.


Yes, you might prefer a Volt, but not many others agree with you most notably GM.

Charging faster is not really an option until other batteries are available.. Or are you talking about the slow charging of the Volt?? That option is off the table. Hybrids are not in the future of EV driving.

Rick C.

+- Get 6 months of free supercharging
+- Tesla referral code - https://ts.la/richard11209

bitrex
Guest

Sat Jan 12, 2019 8:45 am   



On 01/12/2019 01:45 AM, gnuarm.deletethisbit_at_gmail.com wrote:
Quote:
On Saturday, January 12, 2019 at 1:32:01 AM UTC-5, bitrex wrote:
On 01/12/2019 01:25 AM, bitrex wrote:

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.

   Rick C.

   -- 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.

I would very much prefer to buy a Volt made in Detroit but if the
Chinese were to make a clone with a few improvements like say charge
twice as fast and price it at $25k, if it seemed at least no less
well-made than the US variant I don't think I'd turn it down.

Yes, you might prefer a Volt, but not many others agree with you most notably GM.

Charging faster is not really an option until other batteries are available. Or are you talking about the slow charging of the Volt?? That option is off the table. Hybrids are not in the future of EV driving.

Rick C.

+- Get 6 months of free supercharging
+- Tesla referral code - https://ts.la/richard11209


No reason the battery technology it has now can't charge somewhat
faster, the Leaf's Level 2 charger electronics can draw 6.6 kW. The Volt
tops out at around 3.8 kW they cheeped out on the charger electronics a
bit to hit a price have to save money for the gas-burner! Someone may
design an aftermarket mod/hack at some point if it's feasible, dunno.

bitrex
Guest

Sat Jan 12, 2019 8:45 am   



On 01/12/2019 01:42 AM, gnuarm.deletethisbit_at_gmail.com wrote:
Quote:
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.

   Rick C.

   - Get 6 months of free supercharging
   - 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.

Rick C.

-- 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!

Rick C.

-+ 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...

bitrex
Guest

Sat Jan 12, 2019 8:45 am   



On 01/12/2019 02:00 AM, bitrex wrote:
Quote:
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.

     Rick C.

     - Get 6 months of free supercharging
     - 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.

    Rick C.

    -- 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!

   Rick C.

   -+ 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...


I saw one Model 3 last week in a parking garage:

<https://www.dropbox.com/s/38v5n89bjlm8cv2/IMG_20181214_130053770_HDR.jpg?dl=0>

Does it have an auto-park system I think something's wrong with it.

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