Message from @Uksio

Discord ID: 600367283680051249


2019-07-15 16:42:01 UTC  

it's called inrush current

2019-07-15 16:42:22 UTC  

any motor draws up to 10x the inrush current to break the inertia of a dead stop

2019-07-15 16:42:37 UTC  

once the motor is spinning, it only needs alittle current

2019-07-15 16:42:41 UTC  

@Grok you cant do that even when driving auto, lol

2019-07-15 16:42:45 UTC  

@ManAnimal There is a sweet spot of efficiency in every electric motor, you are loosing energy before or past that point

2019-07-15 16:42:55 UTC  

read the greentext or whatever on the dude who jacked off at 90mph

2019-07-15 16:42:55 UTC  

yyup

2019-07-15 16:43:04 UTC  

Gears are also a power wasters though

2019-07-15 16:43:19 UTC  

well you are trading torqure for speed

2019-07-15 16:43:30 UTC  

best to run the motor at constant speed

2019-07-15 16:43:43 UTC  

tesla model 3 top speed is 263kmhr

2019-07-15 16:43:53 UTC  

batteries are mainly too heavy to run trucks as well

2019-07-15 16:43:56 UTC  

and change the ratio of rotation delivered to the axel

2019-07-15 16:44:16 UTC  

Fun fact: many huge robotic arms also have "gears"
Or rather two types of motors connected via common differential
One motor is an AC, another is DC
One starts moving an arm, another keeps it moving

2019-07-15 16:44:36 UTC  

yeah, that is one way to do it . another is usingg a capacitor

2019-07-15 16:44:47 UTC  

Called Motor-Generators

2019-07-15 16:44:47 UTC  

im not an electrical engineer but i study materials engineering

2019-07-15 16:44:50 UTC  

@Uksio keel.

2019-07-15 16:44:51 UTC  

almost certain teslas don't have gears that switch

2019-07-15 16:45:02 UTC  

These complicated setups are being replaced by a hybrid AC/DC motors that can do all that by themselves now

2019-07-15 16:45:14 UTC  

So differential coupling is a bit outdated now

2019-07-15 16:45:19 UTC  

did alot of retrofits of those type of units swapping the starter motor for a Variable Freq Drive

2019-07-15 16:45:35 UTC  

@Krisemann the only thing I remember is crystal structure and how the different ones form under different temps and pressures

2019-07-15 16:45:50 UTC  

VFDs are typically even better than MGs

2019-07-15 16:45:58 UTC  

@Jack of Trades yeah like iron FCC and BCC etc

2019-07-15 16:46:00 UTC  

and always 'better' in terms of efficency

2019-07-15 16:46:15 UTC  

but i'd take the drop in efficency to be able to 'drive' and EV

2019-07-15 16:46:38 UTC  

yeah it has a reduction gear

2019-07-15 16:46:43 UTC  

> one gear hahaha
> two gear hahaha

2019-07-15 16:46:45 UTC  

but it doesn't like go frmo gear 1 ro gear 2

2019-07-15 16:46:45 UTC  

differential

2019-07-15 16:46:53 UTC  

not a transmission

2019-07-15 16:47:07 UTC  

@Krisemann yeah plus some other stuff. I had the basic materials class, then a lot of stuff related to silicon in specific

2019-07-15 16:47:13 UTC  

Differential transmissions are also a thing

2019-07-15 16:47:16 UTC  

@Uksio so a mechanical part can do 1 million miles, but their argument is that they dont have a lot of mechanical parts so mmuh EV good

2019-07-15 16:47:19 UTC  

so not really a 'gear' in the sense we normally use it

2019-07-15 16:47:38 UTC  
2019-07-15 16:47:40 UTC  

electronics don't have that kind of reliability

2019-07-15 16:47:58 UTC  

you can only cycle a transistor so many times

2019-07-15 16:47:59 UTC  

well, they can