Looking at some 1/4 mile times for MIG and US cars there is less than 0.1s between them so we aren’t seeing differences in the real world it seems. 3L with the less powerful motors vs 5L with the more powerful motors as a system doesn’t appear to have a notable gap in performance.
Not at all. The motors cannot consume more power than the battery can supply.
The power output from the motor is not the power consumption and it also varies by rpm. I wonder what this is for the motors as it may go some way to explain the lack of difference in performance.
The very best time I know from a MIG MYP 2022 is 12.1s were there are several 11-12s times from US cars, but that is no the point. The main focus should not be the times we see at 90%+ SoC, but the ones we see at maybe 70-75%. This were a hot Panasonic starts to drop below its 430kW power limit, were the LG starts to drop from 100% straight away. Were there are some 3,8s runs in the MYP with LG5L, there are only 4,2s runs at 70-80% SoC. The LG can provide the power to meet the advertised numbers. The key question is, for how long?
The battery packs. More info can be found here - use caution it's in German ;-)
Yes and I can imagine that the 3D6 is a little more efficient, hence more power to the wheels and less heat. We should be mainly talking about peak power in the region of 80-90kph though. This is the only value that can be well compared if we dont want to go into a complex integrate calculation of the power curve ;-)
The full rpm power curve for the cat 2 and cat 3 should clear up a lot of things. Looking through the data you linked to it appears the cat 3 is consuming the same amount of power (based on same voltage and amps) but is outputting about 6.8% more power.
I wonder if we adjust the 3d6 data upwards by 6.8% then that would close the gap almost completely. The shift to cat 3 with the 5L seems to be to use a more efficient motor as it consumes the same electrical power as the cat 2 but outputs more power.
Drive Unit Cat 2 and 3 are completely identical in the real world as it is both the 3D3/3D6 motor combination and both motors are ready to use their max power limits of 630Ax335V and 840x320V. I really dont know why they are rated at different maximum power, when all values are overshot by far. I've test run my Model 3 Performance 2022 (DU CAT2) and another users MYP 2022 (DU CAT3) and the DU CAT2 in my car sends more power to the wheels, because the Panasonic delivers more power.
These cars are INCREDIBLY consistent if all parameters are held the same. I typically only see a few hundredths variation in times over the 1/4 mile. 0-60 mph times I see about .01 difference typically.
We are talking not on a drag strip here. In less than ideal road conditions numbers can be much less consistent.
Just logging Scan My Tesla Numbers. So, when I say 430kW, then this is peak Bat Power in SMT, not me owning a Dyno or similar. It really only is comparing BMS numbers from the same manufacturer and guessing that they are all off by the same amount to real wheel power.
Would be good to get some back to back dyno comparisons on the wheel outputs on a 2022 M3P cat 2 and cat 3.
It consumes the same amount of power despite the higher output. Different magnets, tolerances and casing can have significant impact on the power output. What is the difference between these motors?
The stator has hairpin windings vs. wire windings AIUI.
That can result in a significant increase in power output with everything else being the same.
Dragstrip doesn’t even seem to matter with the Model 3 Performance for traction. I never have had it break loose even on regular streets. Dragstrip is necessary because running these speeds on regular streets just isn’t a prudent thing to do.
It affects the tyre grip in a linear way so exact comparisons would have to be done on the same piece of road. It won’t break grip as it controls the traction. Plus I can only find 2 data points for Berlin made cars and 100s for US ones. The data varies wildly as you can imagine on the US ones, some more than 4s to 60 and 13s 1/4 mile times.
