Shouldn't the Tesla car be named Edison?
Shouldn't the Tesla car be named Edison?
(OP)
After all, it is a dc vehicle, no?
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RE: Shouldn't the Tesla car be named Edison?
Gunnar Englund
www.gke.org
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RE: Shouldn't the Tesla car be named Edison?
RE: Shouldn't the Tesla car be named Edison?
RE: Shouldn't the Tesla car be named Edison?
Are you thinking Westinghouse, perhaps?
Gunnar Englund
www.gke.org
--------------------------------------
Half full - Half empty? I don't mind. It's what in it that counts.
RE: Shouldn't the Tesla car be named Edison?
Calling it a Westinghouse would bring up images of washing machines and refrigerators to us old geezers...
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RE: Shouldn't the Tesla car be named Edison?
Edison's assistant was named what?
Or why not the Morgan, after the person that financed both Edison and Tesla at one time or another.
RE: Shouldn't the Tesla car be named Edison?
But if Elon Musk called his cars "Ferraris", he would have been in trouble from the outset...
"You measure the size of the accomplishment by the obstacles you had to overcome to reach your goals" -- Booker T. Washington
RE: Shouldn't the Tesla car be named Edison?
It was known and it was taught in schools that two sines with 90 degree phase difference create a circle in a Cartesian system and that the circle "runs in different directions depending on the phase shift being +90 or -90 degrees.
I would say that both guys invented the induction motor. Independently.
I'm not so sure if induction motors are used in the Tesla (I haven't got the one I ordered yet - even if I was very particular about the delivery date!). I ordered it under the assumption (sorry, Jeff) that it uses PM motors. If it doesn't, I will send it back.
Gunnar Englund
www.gke.org
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RE: Shouldn't the Tesla car be named Edison?
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RE: Shouldn't the Tesla car be named Edison?
Definitely an AC motor, and the link above from Tesla i.e. the horse's mouth, calls the one in the roadster an "induction motor".
Does the model S have a permanent magnet AC motor rather than a true induction motor? I don't know, but if it does, it will likely also have a forced fluid cooling system on it because the PM motors are affected a lot by heat.
RE: Shouldn't the Tesla car be named Edison?
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RE: Shouldn't the Tesla car be named Edison?
Copper rotor keeps slip at a minimum. That is good. It also does away with the potentially dangerous situation with "forced" field weakening at higher speeds. Tesla seems to be doing the right things. And batteries are quickly getting better and cheaper. Graphene seems to be useful here, too.
Gunnar Englund
www.gke.org
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Half full - Half empty? I don't mind. It's what in it that counts.
RE: Shouldn't the Tesla car be named Edison?
And yes, they are AC induction motors and no, they are not iPM or sPM AC motors, they are basic induction motors, albeit custom made for this application.
"You measure the size of the accomplishment by the obstacles you had to overcome to reach your goals" -- Booker T. Washington
RE: Shouldn't the Tesla car be named Edison?
Mike McCann, PE, SE (WA)
RE: Shouldn't the Tesla car be named Edison?
RE: Shouldn't the Tesla car be named Edison?
RE: Shouldn't the Tesla car be named Edison?
RE: Shouldn't the Tesla car be named Edison?
The "overdrive" (5th and 6th gear) that makes cruising at high speed economical is easier and safer - almost automatic (increase f and keep U so that V/Hz is reduced) when you use an induction motor.
If you have a PM motor, you need to reduce the flux by forcing it down with the stator flux. That is not only wasteful, it is also dangerous because the slightest irregularity in the control will let the PM flux grow back to base speed flux. Imagine then, what happens to motor voltage when motor is running at twice or three times base speed.
Yes, it gets very high and kills (explodes) the inverter.
Therefore, the induction motor is a better choice. And if you use a Cu cage, the slip can be kept at very low values, so that efficiency is maintained.
Gunnar Englund
www.gke.org
--------------------------------------
Half full - Half empty? I don't mind. It's what in it that counts.
RE: Shouldn't the Tesla car be named Edison?
(I do know assistant's name for Alexander Graham Bell and for fictional detective Sherlock Holmes, but not for Edison).
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RE: Shouldn't the Tesla car be named Edison?
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RE: Shouldn't the Tesla car be named Edison?
Keith Cress
kcress - http://www.flaminsystems.com
RE: Shouldn't the Tesla car be named Edison?
"You measure the size of the accomplishment by the obstacles you had to overcome to reach your goals" -- Booker T. Washington
RE: Shouldn't the Tesla car be named Edison?