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Incorrect. Frequent RANGE charging (charging to over 90%) can cause a problem. But using the Supercharger to less than 90% does not hurt anything.
This is still not confirmed on whether or not front motor bias is affected by range mode.
SomeJoe7777
Marginally-Known Member
I've done a lot of road trips in my 85D with Range Mode on, and I can't tell any difference in front motor noise from when Range Mode is off.
As to the front motor noise, I rather like it. No, it's not as quiet as a RWD model, but it's quieter than an ICE. And it sounds like a spaceship when you floor it.
As to the front motor noise, I rather like it. No, it's not as quiet as a RWD model, but it's quieter than an ICE. And it sounds like a spaceship when you floor it.
Chasedrgc1223
Nearly Insane
With range mode on, you will likely notice more whine since it (supposedly) relies more on the front motor. Since it is closer to the driver and less insulated (compared to the rear motor mount), I would expect more of a whine. In my 85D, I've had the whine since day one, but I love it!
Well, although I don't mind the slight whine, I also have a Chevy Volt and even at full throttle, it *is* completely silent. Of course, Volt full throttle and S full throttle are two entirely different things..
SomeJoe7777
Marginally-Known Member
Well, although I don't mind the slight whine, I also have a Chevy Volt and even at full throttle, it *is* completely silent. Of course, Volt full throttle and S full throttle are two entirely different things..
Volt, Leaf, i3, etc. all use permanent-magnet motors. The rotor on those types of motors rotates synchronously with the stator's magnetic field, which results in quieter operation.
The Teslas use an induction motor. The rotor on these rotates asynchronously with the stator's magnetic field (rotor is slower than the stator magnetic field rotation). This induces large currents in the rotor, and produces magnetic flux harmonics throughout the rotor and stator cores. This is the source of a lot of the sound in the Tesla drive motors.
davidc18
Active Member
I would have expected (and appreciated) more sound proofing around the front of the car, since, as you point out, the motors clearly make noise.
The rear wheel drive only car (with larger motor and higher currents) does not produce a whine in the cabin. I do not recall any significant level of whine from the front motor during the short period I spent in a P90DL (40 minutes) In a very brief journey in a new 70D (could have been a 90D or an 85D) there was a very noticeable noise from the front motor.
Are the front motors different between the 70D, 85D, 90D and P90DL?
Are the front motors different between the 70D, 85D, 90D and P90DL?
SomeJoe7777
Marginally-Known Member
Front motors are all the same in 70D 85D 90D P85D P90D.
The larger rear motor in the RWD cars and P85D/P90D cars actually has a lower magnetic flux density because of its size, which is also why it's less efficient and has less "whine". Combine that with the distance from the driver and the sound dampening of the rear seats and rear floor, and it's significantly quieter in the interior of the car than the front motors.
The larger rear motor in the RWD cars and P85D/P90D cars actually has a lower magnetic flux density because of its size, which is also why it's less efficient and has less "whine". Combine that with the distance from the driver and the sound dampening of the rear seats and rear floor, and it's significantly quieter in the interior of the car than the front motors.
pedriscoll
Active Member
I have noted it from day 1 in my 85D. I find it pleasing, like a spaceship accelerating, "Mr Sulu, take us to warp 1".
I thought, apparently incorrectly, that all traction motors were designed to run at similar levels of flux in the air gap at rated load. Too much flux and excessive saturation in the pole teeth occurs, too little and motor weight is higher than it need be.
So far I've been in two AWD cars a 2015 85D and a 2016 P90DL with the latter being a lot quieter. From a personal perspective I hope the 90D that is due soon is quiet like the P90DL rather than whine like the 85D. It will be hard not to be disappointed if the silence of the test drive is replaced with a whine from the front for the next several years.
So far I've been in two AWD cars a 2015 85D and a 2016 P90DL with the latter being a lot quieter. From a personal perspective I hope the 90D that is due soon is quiet like the P90DL rather than whine like the 85D. It will be hard not to be disappointed if the silence of the test drive is replaced with a whine from the front for the next several years.
I did this experiment on the way to work today. Find a flat road and while cruising at set speed, toggle the range mode button on/off. With it on, the front motor makes a slight continuous whine. Toggle it off, and it disappears. So it definitely looks like range mode will utilize the front motor more. The whine, although continuous, is still so quiet that I can only really hear it with audio off and all windows closed. With music playing it pretty much disappears.
Petra
Member
Perhaps not confirmed, but the noise from the front motor increases substantially whenever range mode is enabled. There also seems to be a spike in front motor noise (shift in noise bias from rear to front) around the 40mph range with range mode off, which then transitions back at higher speeds I think. Anyway, the noise that the OP is mentioning is likely the normal motor noise that all Teslas (both AWD and RWD) make.
Also, a volume setting of 8? My god... the first notch of setting 4 is fairly loud. Unless you're listening to really quiet source audio, I don't see how a setting that high wouldn't be physically painful.
