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Re: Question about power capacity of electrical motors.

From	jimp@specsol.spam.sux.com
Newsgroups	sci.physics.electromag, sci.electronics.design, sci.physics
Subject	Re: Question about power capacity of electrical motors.
Date	2017-07-16 02:00 +0000
Organization	A noiseless patient Spider
Message-ID	<7utq3e-ic1.ln1@mail.specsol.com> (permalink)
References	<okdk1a$426$1@dont-email.me> <9l3q3e-vor.ln1@mail.specsol.com> <qn6lmc9umq4vqsgomhfou5rjf4gja7of0g@4ax.com>

Cross-posted to 3 groups.

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In sci.physics.electromag krw@notreal.com wrote:
> On Sat, 15 Jul 2017 18:31:37 -0000, jimp@specsol.spam.sux.com wrote:
> 
>>In sci.physics.electromag Robert Clark <rgregoryclark@gmspambloackail.com> wrote:
>>> I read that the Tesla electric motor is able to achieve its remarkable power 
>>> to weight ratio of 8.5 kW/kg, about 10 times better than a typical gasoline 
>>> engine, because it tightly winds its copper wires in its coils therefore 
>>> being able to carry more current in the same space. If so, then we should be 
>>> able to produce more power if we have a material that can carry more 
>>> current.
>>
>>We have such a material and it is called silver.
> 
> That would make the chop shops happy.

Barbers, salad stores or those stripping stolen cars?


>>> Carbon nanotubes are such a material. In tests they can carry orders of 
>>> magnitude more current than ordinary conductors such as copper, aluminum, or 
>>> gold. The problem is they've only be able to be produced for short lengths, 
>>> a few centimeters at most.
>>> 
>>> But an interesting research on nanotube-copper composites showed they can 
>>> carry a 100 times more current than standard copper. So for the same size 
>>> electric motor we could produce 100 times more power than currently:
>>> 
>>> Posted: Aug 06, 2013
>>> Novel CNT-copper nanocomposite delivers a 100-fold increase in current 
>>> density
>>> http://www.nanowerk.com/spotlight/spotid=31710.php
>>
>>Current density and power are two different things.
>>
>>The actual issue is temperature rise because of winding resistance.
>>
>>> For the Tesla that would not be as major a deal because of the small size of 
>>> the motor at only about 32 kilos for the Tesla S, a vehicle that weighs 
>>> thousands of kilos.
>>> 
>>> But that would be major for large scale motors used in other scenarios. 
>>> These can weigh thousands of kilos, and could then be reduced to only tens 
>>> of kilos. It would also be especially important for proposed electric 
>>> aircraft that many groups are working towards.
>>
>>The problem with electric airplanes is the lack of a power source that is
>>comparable to gasoline or jet fuel not the weight of electric motors.
> 
> Props are rather old-school, too.

But quit efficient.

>>> So is it really true we can increase electric motor power levels simply by 
>>> using wire of higher current capacity?
>>
>>No, you need to reduce resistive losses and/or get rid of heat.
> 
> And.

And what in regards to electric motors?

-- 
Jim Pennino

Thread

Question about power capacity of electrical motors. "Robert Clark" <rgregoryclark@gmSPAMBLOACKail.com> - 2017-07-15 13:43 -0400
  Re: Question about power capacity of electrical motors. Cursitor Doom <curd@notformail.com> - 2017-07-15 18:39 +0000
  Re: Question about power capacity of electrical motors. jimp@specsol.spam.sux.com - 2017-07-15 18:31 +0000
    Re: Question about power capacity of electrical motors. Piglet <erichpwagner@hotmail.com> - 2017-07-15 20:09 +0100
      Re: Question about power capacity of electrical motors. jimp@specsol.spam.sux.com - 2017-07-15 19:19 +0000
        Re: Question about power capacity of electrical motors. rickman <gnuarm@gmail.com> - 2017-07-21 05:44 -0400
          Re: Question about power capacity of electrical motors. jimp@specsol.spam.sux.com - 2017-07-21 15:24 +0000
            Re: Question about power capacity of electrical motors. rickman <gnuarm@gmail.com> - 2017-07-21 12:17 -0400
              Re: Question about power capacity of electrical motors. jimp@specsol.spam.sux.com - 2017-07-21 17:07 +0000
                Re: Question about power capacity of electrical motors. rickman <gnuarm@gmail.com> - 2017-07-21 13:42 -0400
                Re: Question about power capacity of electrical motors. jimp@specsol.spam.sux.com - 2017-07-21 18:05 +0000
                Re: Question about power capacity of electrical motors. John S <Sophi.2@invalid.org> - 2017-07-21 13:46 -0500
                Re: Question about power capacity of electrical motors. rickman <gnuarm@gmail.com> - 2017-07-21 15:07 -0400
                Re: Question about power capacity of electrical motors. jimp@specsol.spam.sux.com - 2017-07-21 19:30 +0000
                Re: Question about power capacity of electrical motors. rickman <gnuarm@gmail.com> - 2017-07-21 17:31 -0400
                Re: Question about power capacity of electrical motors. jimp@specsol.spam.sux.com - 2017-07-21 22:11 +0000
                Re: Question about power capacity of electrical motors. rickman <gnuarm@gmail.com> - 2017-07-21 19:04 -0400
      Re: Question about power capacity of electrical motors. whit3rd <whit3rd@gmail.com> - 2017-07-15 16:13 -0700
    Re: Question about power capacity of electrical motors. krw@notreal.com - 2017-07-15 18:46 -0400
      Re: Question about power capacity of electrical motors. jimp@specsol.spam.sux.com - 2017-07-16 02:00 +0000
        Re: Question about power capacity of electrical motors. krw@notreal.com - 2017-07-15 22:38 -0400
          Re: Question about power capacity of electrical motors. jimp@specsol.spam.sux.com - 2017-07-16 03:07 +0000
            Re: Question about power capacity of electrical motors. Jos Bergervoet <jos.bergervoet@xs4all.nl> - 2017-07-16 09:20 +0200
    Re: Question about power capacity of electrical motors. "Robert Clark" <rgregoryclark@gmSPAMBLOACKail.com> - 2017-07-15 21:46 -0400
      Re: Question about power capacity of electrical motors. jimp@specsol.spam.sux.com - 2017-07-16 02:13 +0000
        Re: Question about power capacity of electrical motors. rickman <gnuarm@gmail.com> - 2017-07-21 05:49 -0400
          Re: Question about power capacity of electrical motors. jimp@specsol.spam.sux.com - 2017-07-21 15:26 +0000
            Re: Question about power capacity of electrical motors. rickman <gnuarm@gmail.com> - 2017-07-21 12:45 -0400
              Re: Question about power capacity of electrical motors. Serg io <invaalid@invalid.com> - 2017-07-21 12:08 -0500
              Re: Question about power capacity of electrical motors. jimp@specsol.spam.sux.com - 2017-07-21 17:10 +0000
                Re: Question about power capacity of electrical motors. rickman <gnuarm@gmail.com> - 2017-07-21 13:43 -0400
                Re: Question about power capacity of electrical motors. jimp@specsol.spam.sux.com - 2017-07-21 18:07 +0000
                Re: Question about power capacity of electrical motors. rickman <gnuarm@gmail.com> - 2017-07-21 15:10 -0400
                Re: Question about power capacity of electrical motors. jimp@specsol.spam.sux.com - 2017-07-21 19:32 +0000
                Re: Question about power capacity of electrical motors. rickman <gnuarm@gmail.com> - 2017-07-21 17:32 -0400
                Re: Question about power capacity of electrical motors. jimp@specsol.spam.sux.com - 2017-07-21 22:11 +0000
    Re: Question about power capacity of electrical motors. David Lesher <wb8foz@panix.com> - 2017-07-17 22:29 +0000
    Re: Question about power capacity of electrical motors. "Robert Clark" <rgregoryclark@gmSPAMBLOACKail.com> - 2017-07-21 04:18 -0400
      Re: Question about power capacity of electrical motors. jimp@specsol.spam.sux.com - 2017-07-21 15:29 +0000
  Re: Question about power capacity of electrical motors. John Larkin <jjlarkin@highlandtechnology.com> - 2017-07-15 12:51 -0700
    Re: Question about power capacity of electrical motors. kevin93 <kevin@whitedigs.com> - 2017-07-15 13:56 -0700
      Re: Question about power capacity of electrical motors. rickman <gnuarm@gmail.com> - 2017-07-21 06:22 -0400
        Re: Question about power capacity of electrical motors. Lasse Langwadt Christensen <langwadt@fonz.dk> - 2017-07-21 05:57 -0700
          Re: Question about power capacity of electrical motors. rickman <gnuarm@gmail.com> - 2017-07-21 13:08 -0400
    Re: Question about power capacity of electrical motors. Serg io <invaalid@invalid.com> - 2017-07-15 23:47 -0500
      Re: Question about power capacity of electrical motors. benj <nobody@gmail.com> - 2017-07-16 00:58 -0400
        Re: Question about power capacity of electrical motors. Jos Bergervoet <jos.bergervoet@xs4all.nl> - 2017-07-16 09:22 +0200
          Re: Question about power capacity of electrical motors. benj <nobody@gmail.com> - 2017-07-17 01:13 -0400
            Re: Question about power capacity of electrical motors. Serg io <invaalid@invalid.com> - 2017-07-17 08:46 -0500
      Re: Question about power capacity of electrical motors. rickman <gnuarm@gmail.com> - 2017-07-21 06:26 -0400
        Re: Question about power capacity of electrical motors. jimp@specsol.spam.sux.com - 2017-07-21 15:32 +0000
          Re: Question about power capacity of electrical motors. Serg io <invaalid@invalid.com> - 2017-07-21 11:09 -0500
          Re: Question about power capacity of electrical motors. rickman <gnuarm@gmail.com> - 2017-07-21 13:12 -0400
            Re: Question about power capacity of electrical motors. jimp@specsol.spam.sux.com - 2017-07-21 17:25 +0000
              Re: Question about power capacity of electrical motors. rickman <gnuarm@gmail.com> - 2017-07-21 13:45 -0400
                Re: Question about power capacity of electrical motors. jimp@specsol.spam.sux.com - 2017-07-21 18:08 +0000
              Re: Question about power capacity of electrical motors. benj <benj@nobody.net> - 2017-07-21 18:53 -0400
    Re: Question about power capacity of electrical motors. rickman <gnuarm@gmail.com> - 2017-07-21 06:00 -0400
      Re: Question about power capacity of electrical motors. Lasse Langwadt Christensen <langwadt@fonz.dk> - 2017-07-21 06:05 -0700
        Re: Question about power capacity of electrical motors. Jim Thompson <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> - 2017-07-21 08:35 -0700
        Re: Question about power capacity of electrical motors. rickman <gnuarm@gmail.com> - 2017-07-21 13:17 -0400
      Re: Question about power capacity of electrical motors. Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2017-07-21 09:48 -0400
        Re: Question about power capacity of electrical motors. rickman <gnuarm@gmail.com> - 2017-07-21 13:30 -0400
      Re: Question about power capacity of electrical motors. Jos Bergervoet <jos.bergervoet@xs4all.nl> - 2017-07-21 17:30 +0200
        Re: Question about power capacity of electrical motors. rickman <gnuarm@gmail.com> - 2017-07-21 13:34 -0400
          Re: Question about power capacity of electrical motors. John S <Sophi.2@invalid.org> - 2017-07-21 13:08 -0500
  Re: Question about power capacity of electrical motors. "Tim Williams" <tiwill@seventransistorlabs.com> - 2017-07-15 19:51 -0500
    Re: Question about power capacity of electrical motors. kevin93 <kevin@whitedigs.com> - 2017-07-15 18:16 -0700
      Re: Question about power capacity of electrical motors. "Tim Williams" <tiwill@seventransistorlabs.com> - 2017-07-16 00:47 -0500
    Re: Question about power capacity of electrical motors. "Robert Clark" <rgregoryclark@gmSPAMBLOACKail.com> - 2017-07-21 06:05 -0400
  Question about power capacity of electrical motors. pcdhobbs@gmail.com - 2017-07-15 18:14 -0700

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