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Model 3 Motor

ThosEM

Space Weatherman
Dec 13, 2013
870
323
Annapolis, MD
Well, this is interesting if true: the Model 3 has a different type of motor with permanent magnets according to this.
The Secrets of Electric Cars and Their Motors: It's Not All About the Battery, Folks

The arguments at the end seems specious(read: BS) to me.
Could it be that Tesla has found a solution to their overheating problem under high loads, where the rotor has no thermal conductance to the outside world? Could a permanent magnet rotor do the trick?

What do you make of this?
 

03DSG

Active Member
Apr 5, 2016
2,154
2,522
Ontario
Well, this is interesting if true: the Model 3 has a different type of motor with permanent magnets according to this.
The Secrets of Electric Cars and Their Motors: It's Not All About the Battery, Folks

The arguments at the end seems specious(read: BS) to me.
Could it be that Tesla has found a solution to their overheating problem under high loads, where the rotor has no thermal conductance to the outside world? Could a permanent magnet rotor do the trick?

What do you make of this?

Maybe why the upcoming new Roadster can do 0-60 in 1.9 “all day long” according to the demo driver.
 

Vic4Model3

Member
Feb 11, 2016
92
42
United States
Currently S & X use an Induction Motor, which seem to be less efficient than a Permanent Magnet Motor, which is probably why all other EV manufacturers are using or designing future products with PM Motors. Would not be surprised if Tesla moves the S & X away from their namesake Tesla Induction Motor to a Permanent Magnet Motor in the future.
 

Cosmacelf

Well-Known Member
Mar 6, 2013
8,779
22,251
San Diego
Yes indeed, the 3 uses a different type of motor, PM rather than induction on the S&X. In general, PM motors are more energy efficient and require less cooling. Read this still relevant Tesla blog post from 11(!) years ago about this:

Induction Versus DC Brushless Motors

The reason Tesla went with induction on the Roadster, S and X seems to be cost and peak efficiency for a high powered motor. Since then, PM magnets have probably come down in cost (due to continuing increased demand from the industry), and the 3 isn’t a high performance machine, so no need to optimize for high performance.
 
  • Informative
Reactions: Vern Padgett

ThosEM

Space Weatherman
Dec 13, 2013
870
323
Annapolis, MD
Maybe that's why they scavenged heat from the motor to help with cabin/pack heating? Oh oh, maybe the new setup will be less efficient in cold weather when more resistance heating is needed?
 

ratsbew

Active Member
Mar 3, 2012
1,290
1,026
O'Fallon, IL
Undoubtedly Tesla did the math and figured it was cheaper to spend a bit more on the PM motor that is slightly more efficient and have a smaller battery for the same range as a result.
 

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