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 > Tesla Semi truck unveil & test ride set for Oct 26th !

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Yosemite Sam1

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Posted: 05/11/20 10:53am Link  |  Quote  |  Print  |  Notify Moderator

Here is a quote from someone at the Tesla forum on the concerns on the reduced range of Cybertruck when towing. Must be relevant to Semis too.

"I don't think the cybertruck will be affected as much as the Model x. The model x uses induction motors. An electric motor is most efficient when it is under a full load, so for model x efficiency reasons Tesla would not have put a much bigger motor than is needed for non-towing use. This means that when model x is towing it's motor is not at full back emf and is slightly leaking. ( Not all the energy goes to power, it is wasted as heat).
The cybertruck will not have this problem because it will use switched reluctance motors. With switching you can alter the timing to increase torque at the expense of top speed. Cybertruck will have a tow mode. I believe this mode means top speed will be dropped from 130 to say 85. power= torque x rpm so if you lower the rpm you get more torque. I have seen electric motors where you can set the timing for as much as a 20% difference in torque."

Reisender

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Posted: 05/11/20 11:08am Link  |  Quote  |  Print  |  Notify Moderator

Yosemite Sam1 wrote:

Here is a quote from someone at the Tesla forum on the concerns on the reduced range of Cybertruck when towing. Must be relevant to Semis too.

"I don't think the cybertruck will be affected as much as the Model x. The model x uses induction motors. An electric motor is most efficient when it is under a full load, so for model x efficiency reasons Tesla would not have put a much bigger motor than is needed for non-towing use. This means that when model x is towing it's motor is not at full back emf and is slightly leaking. ( Not all the energy goes to power, it is wasted as heat).
The cybertruck will not have this problem because it will use switched reluctance motors. With switching you can alter the timing to increase torque at the expense of top speed. Cybertruck will have a tow mode. I believe this mode means top speed will be dropped from 130 to say 85. power= torque x rpm so if you lower the rpm you get more torque. I have seen electric motors where you can set the timing for as much as a 20% difference in torque."


I’m sure they'll figure it out. This stuff is way out of my league but I find it interesting.

Cheers.

Yosemite Sam1

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Posted: 05/12/20 12:11pm Link  |  Quote  |  Print  |  Notify Moderator

Chesapeake Future in Peril - Wall Street Journal

Chesapeake Energy maybe declaring bankruptcy.

Can I hear from somebody here who said he'll continue to buy oil stocks with his faith on ICE?

NJRVer

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Posted: 05/12/20 03:03pm Link  |  Quote  |  Print  |  Notify Moderator

Yosemite Sam1 wrote:

Chesapeake Future in Peril - Wall Street Journal

Chesapeake Energy maybe declaring bankruptcy.

Can I hear from somebody here who said he'll continue to buy oil stocks with his faith on ICE?




"The bigger they are, the harder they fall"

Yosemite Sam1

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Posted: 05/12/20 06:36pm Link  |  Quote  |  Print  |  Notify Moderator

Found this. This is CNN, which contrary to some people here, I find reliable and crediblle.

I should be happy with the news, as coupled with Elon's declaration, he'll produce the Cybertruck ahead of the Roadster, so as to get my unit on time or earlier.

But then again, as a Tesla stockholder, I see screaming liability should any of the workers get sick or die.

Solution, took profit and sold my Tesla stock.

Problem solved -- and probably, another opportunity to buy the stock back at lower prices as Elon keeps on yapping and fighting city hall.

Elon Defy State and Opens Factory

8.1 Van

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Posted: 05/30/20 01:44pm Link  |  Quote  |  Print  |  Notify Moderator

Elon sent two men into space today !
[image]

[image]

[image]

* This post was last edited 05/30/20 02:26pm by 8.1 Van *   View edit history


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Yosemite Sam1

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Posted: 05/30/20 08:16pm Link  |  Quote  |  Print  |  Notify Moderator

8.1 Van wrote:

Elon sent two men into space today !


Elon sent an earlier edition of Tesla Roaster to space as publicity stunt.

At least this would have some scientific purpose.

Reisender

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Posted: 05/30/20 08:45pm Link  |  Quote  |  Print  |  Notify Moderator

I kinda like that Space X Model X [emoticon]

Yosemite Sam1

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Posted: 05/30/20 09:05pm Link  |  Quote  |  Print  |  Notify Moderator

Reisender wrote:

I kinda like that Space X Model X [emoticon]


And depending on how serious the fight with the wifey, she would want you to go too -- but just one way.

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Posted: 05/30/20 09:48pm Link  |  Quote  |  Print  |  Notify Moderator

Yosemite Sam1 wrote:

Reisender wrote:

I kinda like that Space X Model X [emoticon]


And depending on how serious the fight with the wifey, she would want you to go too -- but just one way.


[emoticon]

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