Rumor: There will be no single motor Cybertruck! RWD model will be dual motor.

[CTFP]

To be clear - there will still be a $39,990 RWD Cybertruck, but it will have 2 motors on the rear axle.

Might make sense for simplifying manufacturing and motor control if all versions have 2 motors in back:

GUESS:
'Tri motor' = Plaid powertrain
'Dual motor' = Raven powertrain (plus 2nd AC motor in back)*
'Single motor' = Model 3 RWD powertrain (plus 2nd DC motor in back)

* or maybe Model 3 AWD powertrain (plus 2nd DC motor in back) - might cost less to make but less energy efficient?

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[ajdelange]

Do you understand the difference between an AC motor and a DC motor?

 

[roncruiser]

Astute observation! The title bar at the top of this page shows a motor assembly. One of those cylinders contains the motor and the other the inverter - not a second motor.

You can put the inverter anywhere you want, of course, but you must run two wires to it from the battery and three wires from it to the motor. Copper is expensive and so, from that point of view, you want the inverter as close to the motor as possible. There are going to be I-squared R losses in the copper between the battery and stator wherever you put the inverter but the current from the inverter to the stator is high frequency (40 to 80 ? kHz) and that means additional losses from skin effect and wire inductance. Not to mention the radiation of noise up to a couple of MHz. Thus the smart thing to do is put the motor and generator in the same can. The efficiency gain by doing this might be small but as it confers other benefits as well it is clearly the way to go.

[Edit]Forgot to mention that the motor, inverter and gear box all generate heat and are on a common coolant loop. Having these components close to one another simplifies the plumbing for that.

Where Tesla really kills in efficiency is in the motor design. The PMSRM has no squirrel cage I^2R losses because it has no squirrel cage. It has no rotor hysteresis losses because the direction of the rotor flux does not reverse. I think I have seen 97% efficiency claimed for this motor as opposed to 93% for Tesla's older IM (don't take those numbers as gospel).

The skin effect and inductance is going to be insignificant but not eliminated at those frequencies even for a relatively short cable run length assuming they are using beefy enough conductors. Based on what I've seen so far, the Cu conductors they use in their motors are beefy enough.

 

[ajdelange]

Not beefy enough that they don't get hot and waste energy. That's why eliminating rotor copper (and eliminating hysteresis in the rotor) makes the PMSRM appreciably more efficient than the induction motor. And easier to cool.

 

[CybrTrkOregon]

I have a hard time understanding this. So the AWD dual motor will have a single motor in the rr and a single in the front? Why would you put a different drive train in the rr of the dual then the rwd? Why would the AWD be 10k more with the same amount of motors? Makes no sense to me. Of course I am the same guy that want to buy a Hammerhead Eagle i Thrust

AWD has bigger battery capacity

 

[Coutcon]

Because Elon has publicly said that he would suspend the production of the CT1; does anyone know if everyone who pre-ordered a CT1 will be given the chance to upgrade to a CT2 or CT3? I can hardly wait for my CT-3. According to the website "Cybertruck Owners Club Forum" I will have to wait till September 2023 for my cybertruck Trimotor with FSD. It is painful to have to wait.
Does anyone know whether the the CT1, CT2 and CT3 has the same payload capacity?
I have found 3350 as maximum payload, and another at 3500 lbs.? Anyone know for sure?
The Gigaplant plant in Texas is getting built at a very fast pace.

owners

 

[Blue Steel]

Because Elon has publicly said that he would suspend the production of the CT1

You got a source for that?

 

[Crissa]

When did he say that?

Th single motor is for when they have excess demand and batteries.

And no, Tesla has not released different cargo rating for the different motor configurations. The additional motors may have the power/braking required to offset their own weight. So we can't know if it's more or less.

-Crissa

 

[akcoyote]

BS speculation and rumors always get wildly blown out of proportion and are frequently false.

Only when Tesla releases full specs of the production CT versions will we have real facts to discuss. Until then we only have speculation and BS.

 

[jhciv]

Might make sense for simplifying manufacturing and motor control if all versions have 2 motors in back:

GUESS:
'Tri motor' = Plaid powertrain
'Dual motor' = Raven powertrain (plus 2nd AC motor in back)*
'Single motor' = Model 3 RWD powertrain (plus 2nd DC motor in back)

* or maybe Model 3 AWD powertrain (plus 2nd DC motor in back) - might cost less to make but less energy efficient?

That was basically what MotorTrend reported at the launch for the motors. Given Tesla's tendency toward simplicity/software limiting and reducing build variation, I wouldn't be surprised if they've settled on:

CT3: Plaid powertrain with double stacked battery (and maybe tuned for performance - ie. Model 3 performance)
CT2: Plaid powertrain with single stacked battery (less power and range, maybe power limited via software)
CT1: Plaid powertrain with no front motor and smaller single stacked battery

Speculation is fun!

 

[Coutcon]

So my question is, Will all the people that originally ordered CT1 be given a chance to upgrade to a CT2 or a CT3 and still keep there original registration number? I have not heard anything about this. I heard that people can add the FSD option without loosing there place.

 

[Firetruck41]

So my question is, Will all the people that originally ordered CT1 be given a chance to upgrade to a CT2 or a CT3 and still keep there original registration number? I have not heard anything about this. I heard that people can add the FSD option without loosing there place.

The title to this thread says: "Rumor..." That says all you need to know.
So any answer to your question, will just be conjecture on a rumor. Not exactly reliable...

 

[Crissa]

So my question is, Will all the people that originally ordered CT1 be given a chance to upgrade to a CT2 or a CT3 and still keep there original registration number? I have not heard anything about this.

We don't know the answer for certain. The configurator has not been released yet.

However, we have experience with how Tesla ran their Model 3 and Y reservations.

At some point, Tesla will open its configurator. They will contact reservation holders in batches. Those people will be given a chance to configure their cars. At that point in Model 3 and Y, they were able to change their configurations up and down, or not at all. Only some configurations will be available at first! Parts come in and out of availability, after all.

And it's at that point, as they match reservations to what they're ready to build, the start contacting those whose reservations don't match. Like the single-motor, the standard-range reservation holders were given the option to change their details. Upselling to the currently available models is a thing they do.

Once the configurator is online, and you've been contacted, you'll be able to upgrade or downgrade without losing your reservation FSD price.

-Crissa

 

[Old Pro]

I can't say much mostly because I don't know much. What I can tell you is this week I was on conference and spoke with someone "in the know" who assured me that the RWD Variant will be 2 motor, one on each wheel.

He said that from everything he has seen by the design team, there would be no single motor Cybertruck.

To be clear - there will still be a $39,990 RWD Cybertruck, but it will have 2 motors on the rear axle.

I have my checkbook ready!

 

[SSonnentag]

I have my checkbook ready!

This is an ancient thread with bogus information. Scratch the $40K RWD truck. It will never exist. The RWD truck that will exist will be a single motor for $60K.

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