Re: [EVDL] EVLN: Halbach near-monopole e-motor> Focused Magnetics

[Peri Hartman via EV]

Hard to say what the inventor, Catalan, said. But the author, Arcega, 
did make some far fetched claims:


"...half of all the electricity in the world is consumed by electric 
motors... Improving the energy efficiency of the world’s electric motors 
by just one tenth would save enough electricity to run the entire 
country of Japan for an entire year [what ever that technically 
means]... Now imagine if the technology to make electric motors nearly 
twice as efficient were already here."


"He says the prototype motor represents a breakthrough technology that 
effectively doubles the power and efficiency of any device that uses a 
conventional electric motor."


"By harnessing this ‘near-monopole’ energy, Catalan says an electric 
vehicle using a production version of his new motor would travel nearly 
twice as far as a conventional motor on the same set of batteries."


I agree that market spin is open to interpretation, but these statements 
are pretty clear. And pretty wrong.


Peri

-- Original Message --
From: "EVDL Administrator via EV" <ev@lists.evdl.org>
To: "Electric Vehicle Discussion List" <ev@lists.evdl.org>
Cc: "EVDL Administrator" <evp...@drmm.net>
Sent: 11-Feb-18 12:06:25 AM
Subject: Re: [EVDL] EVLN: Halbach near-monopole e-motor> Focused 
Magnetics



We're not talking about academic research here.  This is a for-profit
enterprise.  They want investors.

Obviously I'm not a company insider or "stakeholder," just a skeptic; 
nor am
I an engineer or physicist, so I can't speak to the Halbach related 
claims.


However, let's envision one possible scenario.

Suppose you could reduce losses in a motor from (say) 4% to 2%.  You've
halved the losses, so you've doubled the efficiency, no?

Well, it all depends on how you define it.  If your power input to the 
motor
is 100 Watts, the old version produced 96W of output.  The new one 
produces
98W of output.  That's 2.1% higher (2/96) output. Doesn't sound quite 
as
impressive as "doubling the efficiency," does it?  Which one do you 
think a
salesman, or a PR person, or a "journalist" looking for a clickbait 
story

that willl "go viral," is going to quote?

David Roden - Akron, Ohio, USA
EVDL Administrator

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Re: [EVDL] EVLN: Halbach near-monopole e-motor> Focused Magnetics

[EVDL Administrator via EV]

We're not talking about academic research here.  This is a for-profit 
enterprise.  They want investors.  

Obviously I'm not a company insider or "stakeholder," just a skeptic; nor am 
I an engineer or physicist, so I can't speak to the Halbach related claims. 

However, let's envision one possible scenario.  

Suppose you could reduce losses in a motor from (say) 4% to 2%.  You've 
halved the losses, so you've doubled the efficiency, no?

Well, it all depends on how you define it.  If your power input to the motor 
is 100 Watts, the old version produced 96W of output.  The new one produces 
98W of output.  That's 2.1% higher (2/96) output. Doesn't sound quite as 
impressive as "doubling the efficiency," does it?  Which one do you think a 
salesman, or a PR person, or a "journalist" looking for a clickbait story 
that willl "go viral," is going to quote?

David Roden - Akron, Ohio, USA
EVDL Administrator

= = = = = = = = = = = = = = = = = = = = = = = = = = = = =
EVDL Information: http://www.evdl.org/help/
= = = = = = = = = = = = = = = = = = = = = = = = = = = = = 
Note: mail sent to "evpost" and "etpost" addresses will not 
reach me.  To send a private message, please obtain my 
email address from the webpage http://www.evdl.org/help/ .
= = = = = = = = = = = = = = = = = = = = = = = = = = = = =


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Re: [EVDL] EVLN: Halbach near-monopole e-motor> Focused Magnetics

[Jorg Brown via EV]

On Sat, Feb 10, 2018 at 7:51 PM, Alan Arrison via EV 
wrote:

> What a bunch of baloney. If a motor is already 95% efficient, how do you
> double its efficiency?
>

Thanks for pointing out the obvious.

Just remember: it's unlikely Catalan himself made this claim; he probably
said something more like "cuts wasted electromagnetic fields by half" and
the reporter wrote it down as doubling efficiency.


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Re: [EVDL] EVLN: Halbach near-monopole e-motor> Focused Magnetics

[Alan Arrison via EV]

What a bunch of baloney. If a motor is already 95% efficient, how do you 
double its efficiency?


I'm sure the motor gurus on the list can shoot holes in this nonsense.

There are reasons motors haven't changed much in 100 years.

One, there isn't much room left for improvement, two, the laws of physics.

Al


On 2/10/2018 3:02 PM, brucedp5 via EV wrote:




Achieving Near Monopole Magnetic Fields
Catalan says conventional motors are a bit like incandescent bulbs. Like
photons from a light source, electric motors wastefully radiate magnetic
energy in all directions. Catalan says his motor is configured to act like a
laser, focusing nearly all the magnetic energy exclusively towards the
airgap to enhance power and efficiency. By harnessing this ‘near-monopole’
energy, Catalan says an electric vehicle using a production version of his
new motor would travel nearly twice as far as a conventional motor on the
same set of batteries. Conversely, his motor in its final form would provide
nearly twice as much power or torque as a conventional motor using exactly
the same amount of energy.




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