Model 3 Motor

[ThosEM]

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]

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.

 

[HumanGenome]

Definitely sounds a lot different on the road.

 

[Vic4Model3]

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]

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.

 

[ThosEM]

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]

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.

 

[jsmay311]

Maybe that's why they scavenged heat from the motor to help with cabin/pack heating?

Fixed it for you.

 

[SigNC]

very old thread but seemed like a good place to drop this video:

 

[lUtriaNt]

video is private...

 

[SigNC]

video is private...

dang, they must have changed it

updated link