Language: 
To browser these website, it's necessary to store cookies on your computer.
The cookies contain no personal information, they are required for program control.
  the storage of cookies while browsing this website, on Login and Register.

GDPR and DSGVO law

Storing Cookies (See : http://ec.europa.eu/ipg/basics/legal/cookies/index_en.htm ) help us to bring you our services at overunity.com . If you use this website and our services you declare yourself okay with using cookies .More Infos here:
https://overunity.com/5553/privacy-policy/
If you do not agree with storing cookies, please LEAVE this website now. From the 25th of May 2018, every existing user has to accept the GDPR agreement at first login. If a user is unwilling to accept the GDPR, he should email us and request to erase his account. Many thanks for your understanding.
Amazon Warehouse Deals ! Now even more Deep Discounts ! Check out these great prices on slightly used or just opened once only items.I always buy my gadgets via these great Warehouse deals ! Highly recommended ! Many thanks for supporting OverUnity.com this way.

User Menu

Tesla Paper

Free Energy Book

Get paid

Donations

Please Donate for the Forum.
Many thanks.
Regards, Stefan.(Admin)

A-Ads

Powerbox

Smartbox

3D Solar

3D Solar Panels

DC2DC converter

Micro JouleThief

FireMatch

FireMatch

CCKnife

CCKnife

CCTool

CCTool

Magpi Magazine

Magpi Magazine Free Rasberry Pi Magazine

Battery Recondition

Battery Recondition

Arduino

Ultracaps

YT Subscribe

Gravity Machines

Tesla-Ebook

Magnet Secrets

Lindemann Video

Navigation

Products

Products

WaterMotor kit

Statistics


  • *Total Posts: 525459
  • *Total Topics: 15645
  • *Online Today: 44
  • *Most Online: 103
(December 19, 2006, 11:27:19 PM)
  • *Users: 3
  • *Guests: 7
  • *Total: 10

Author Topic: Anti cogging idea ?  (Read 15521 times)

Offline mscoffman

  • Hero Member
  • *****
  • Posts: 1377
Re: Anti cogging idea ?
« Reply #15 on: May 05, 2010, 04:45:42 PM »
Came across this motor, never heard of these before.
 wonder if the same idea could be used to generate power.

quote from ThinGap Announcement

ThinGap
developed a patented technology, which replaces the
iron core and wire windings of conventional motors
with a precision-machined copper sheet. This has
eliminated such issues as hysteresis, iron losses,
and cogging torque, while substantially reducing the
impact of eddy currents and back emf. The copper
sheets allow higher copper density and a higher
copper to total volume ratio, making ThinGap a
performance leader in high efficiency and power
density motors.

DC Ring Motor Powers 600-lb. Thrust Ducted-Fan
VENTURA, CA – April 20, 2010 – ThinGap LLC, a leader in high power density DC motors, today
announced a TG14090 Brushless DC Ring Motor that delivers 122 kW of shaft power, allowing a
ducted-fan to generate 600 pounds of thrust, depending on the fan blade design. The motor
provides an exceptional power to weight ratio – 6.4 HP per pound; a compact package that fits
the control inside the motor and low thermal load characteristics.


“ThinGap’s 14-inch electric ring motor allows a ducted fan to develop as much thrust as with a
gas engine, which is a game-changing milestone,” said Rean Pretorius, president, ThinGap, LLC.
“At 6.4 HP per pound, its power to weight ratio has not been achieved by any electric motor
currently in production and exceeds the aerospace engineering threshold of 5 HP per pound. The
advantage is much quieter operation for stealth, and less weight, which can be critical for UAV
surveillance and close support tactical applications.”


http://www.thingap.com/pdf/technologypaper.pdf

http://www.thingap.com/pdf/tg14090motor45clean.pdf

http://www.thingap.com/pdf/tg14010ds.pdf

Often air core motors were first used for stepper and servo
motor applications where rotor momentum was a factor.

These techniques are meant for very powerful motors that requires
lots of current as well as high voltages. For lower voltages the
P=E*I requirements would start to become unbalanced and
you would not be able to achieve the required driver device
efficiency specifications to drive the motor coils.

But I will say that very often air-core wound motors and
overunity operation seem to go hand in hand. Also as airstriker
says there is inductive field collapse back-emf and then there
is rotor momentum mechanical back-emf and these are really
separate issues but are treated the same by oversimplified
models because they are physical analogs but in different
systems.

:S:MarkSCoffman

Free Energy | searching for free energy and discussing free energy

Re: Anti cogging idea ?
« Reply #15 on: May 05, 2010, 04:45:42 PM »

Offline Airstriker

  • Sr. Member
  • ****
  • Posts: 330
    • anonimowosc.org
Re: Anti cogging idea ?
« Reply #16 on: May 06, 2010, 12:23:36 AM »
Also as airstriker says there is inductive field collapse back-emf and then there is rotor momentum mechanical back-emf and these are really separate issues but are treated the same by oversimplified
models because they are physical analogs but in different systems.

:S:MarkSCoffman
They are treated the same simply because they always exist together in the current motors / generators. But you are right - they shouldn't be. That's what I'm working on for some time now. And yes - air coils seem to be the right ones to choose if you want to separate these two.

Offline X00013

  • Hero Member
  • *****
  • Posts: 679
Re: Anti cogging idea ?
« Reply #17 on: May 06, 2010, 02:02:53 AM »
Earth is a Hot air core planet. Float a heavy magnet.

Free Energy | searching for free energy and discussing free energy

Re: Anti cogging idea ?
« Reply #17 on: May 06, 2010, 02:02:53 AM »
Sponsored links:




Offline Airstriker

  • Sr. Member
  • ****
  • Posts: 330
    • anonimowosc.org
Re: Anti cogging idea ?
« Reply #18 on: May 06, 2010, 10:18:44 AM »
Earth is a Hot air core planet. Float a heavy magnet.
Yyyy ? It is rather believed that Earth inner core is a solid ball of mostly iron, and nickel - not air ;] Or maybe I just didn't get you ?

 

OneLink