Real Rivian Photos & Videos

CommodoreAmiga

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I've long wondered if RWD/FWD would be an option. CS told me several months ago that the Rivian will be full time AWD.
Much like how they've talked about a Tank Turn mode, I'm hoping for a Donut mode that will allow me to go RWD-only in certain circumstances. I see no reason or benefit to offering FWD.

We honestly don't even know what kind of motors Rivian is using.
Last I heard it was DC brushless. Not sure if that's changed?

I know the dual-motor Tesla Model S has a PMSR motor in the front, but an AC induction motor in the rear.
By naming the company Tesla, they pretty much forced themselves to include an AC motor, imo.

I suspect Rivian's quad-motor system might have the same sort of magic, and may be why the rear motors provide higher torque.
Probably bigger motors compared to the front.





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DucRider

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They are at least AC motors. The inverters must serve some purpose.
Inverters would be needed to charge from AC even with DC motors (but the use of DC motors is unlikely for a variety of reasons)
 

Rhidan

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Inverters would be needed to charge from AC even with DC motors (but the use of DC motors is unlikely for a variety of reasons)
Agree, but I thought we had pretty good confirmation that there were dual-power combined inverters in the drivetrain, one in the front and one in the rear. That helps keep things compact because they only need one inverter to power two motors.

I don't think we've ever had confirmation of what type of motors Rivian is using.
 

kanundrum

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Unless they have changed heir supplier there was a nice screencap of it somewhere I took. Shots below.

1619711677069.png


1619712013146.png
 

CommodoreAmiga

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They are at least AC motors. The inverters must serve some purpose.
You still need an inverter to handle charging at L1/L2.

Also, brushless DC motors can't run on straight DC... There is a controller involved that must pulse the power at the right rate and there's sensors (usually hall-effect) to provide feedback to the controller about rotor position.

Maybe they're using AC induction motors, now? As I said, previously, I don't know for sure. I have seen some patents and conversations with Rivian employees that indicate they were playing around with brushless DC, at least for a while.
 

DucRider

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Agree, but I thought we had pretty good confirmation that there were dual-power combined inverters in the drivetrain, one in the front and one in the rear. That helps keep things compact because they only need one inverter to power two motors.

I don't think we've ever had confirmation of what type of motors Rivian is using.
It would surprise me a bit if they didn't use PMSM.

As a side note, had a fun discussion (actually he discussed - I listened) with the principal of a renowned race spec inverter/motor company (now part of Borg Warner). They market a "Dual Stack" motor - essentially 2 motors in one housing driving a single shaft - and that requires a dual inverter for a "single" motor. They offer those motor cores wound either serial or parallel (different power curves/characteristics), and they've even done mixed motors for some applications (one core SOM, the other DOM).
 

DuckTruck

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aAlpine

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I don't think we've ever had confirmation of what type of motors Rivian is using.
What seems forever ago, at the Denver event I asked an engineer and he told me 4 permanent magnet of their own design, but manufactured by someone else. Of course anything could have changed since then.
 

Trandall

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It would surprise me a bit if they didn't use PMSM.

As a side note, had a fun discussion (actually he discussed - I listened) with the principal of a renowned race spec inverter/motor company (now part of Borg Warner). They market a "Dual Stack" motor - essentially 2 motors in one housing driving a single shaft - and that requires a dual inverter for a "single" motor. They offer those motor cores wound either serial or parallel (different power curves/characteristics), and they've even done mixed motors for some applications (one core SOM, the other DOM).
I wonder if this is similar to what Tesla is using in the 3 and refreshed S & X. I think it is a type of combo induction motor and reluctance motor? I'm also curious what Lucid is using, whatever it is is small, efficient, high torque, and large speed range.
 

Eager2own

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Unless they have changed heir supplier there was a nice screencap of it somewhere I took. Shots below.



1619712013146.png
Looks like maybe just the primer, but this still gets my bet on the closest depiction to what Launch Green (/brown) will look like.
 

electruck

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I don't think we've ever had confirmation of what type of motors Rivian is using.
Who knows what may have changed over time as original statements were that all 4 motors were identical which no longer appears to be the case. But at one point in time, Rivian had stated that permanent magnet motors were being used:
 

Trandall

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Who knows what may have changed over time as original statements were that all 4 motors were identical which no longer appears to be the case. But at one point in time, Rivian had stated that permanent magnet motors were being used:
https://www.engineering.com/story/the-many-types-of-ev-motors
Found this article which gives basic descriptions and comparison of a variety of electric motors used for EV's.
Sounds like the Interior mounted permanent magnet synchronous motor described in the link would be a good candidate for the R1's.
I'm excited to see what kind of additional performance and efficiency can be nursed out of electric motors. I think we will see substantial technological improvement that could be transferred to everything from power tools to building mechanical systems.
 

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