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Author Topic: Recover energy from gravity  (Read 39623 times)

Offline rc4

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Re: Recover energy from gravity
« Reply #105 on: June 02, 2014, 10:42:01 AM »
I tested with a spring, it's easy to sum the energy. First scene without spring, the system lost energy. With a spring the system won energy. A torque is apply to circle, the same torque is apply to stem but moment of inertia are not the same and like energy win/lost is torque by angle of rotation, the system can win energy. I added force on circle because frequency don't must to be high, in this case there are a lot of vibration.

With specific velocity (x,y) the system with 2 arms and an axis give energy. Arms are attrack with gravitational forces.
« Last Edit: June 02, 2014, 10:25:53 PM by rc4 »

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Re: Recover energy from gravity
« Reply #105 on: June 02, 2014, 10:42:01 AM »

Offline rc4

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Re: Recover energy from gravity
« Reply #106 on: June 11, 2014, 07:28:06 PM »
Maybe I can use this last technic with this example. The idea is to accelerate an inertial mass with a motor. All energy consume by motor is in mass in rotation. The motor accelerate only rear bottom green pole from magenta pole ant front top green pole from another magenta pole, the rotor has always Fr/-Fr and turn around its axis of rotation and the stator has Fs/-Fs and turn around axis X. Radius r2 > r1 so the torque on stator is not the same. Magenta pole is fixed to stator.

For the stator it's not more difficult to repuls green pole even it rotates in the contrary direction because the rotor rotates perpendiculary to axis X.
« Last Edit: June 11, 2014, 10:34:25 PM by rc4 »

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Offline rc4

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Re: Recover energy from gravity
« Reply #107 on: June 12, 2014, 12:34:15 PM »
For the last case, angular velocity around axis X can be fixed at w rd/s if an external system (not drawn) recover energy in the same time. No rolling element in the last idea, let rotor change its axis. Or with a rooling element in the center of rotor. With rolling element in the center of the rotor, all forces cancel themselves, at final there are only 2Fr that increase more and more angular velocity of rotor and 2Fs that give torque to external system for recover energy.

3 last images: slope the motor and give forces from magenta to green poles. Fr forces rotates only rotor around its axis and Fs forces rotates around axis red (X).

With a motor parallel to the axis X, with an inertia very high for the rotor, I apply a torque small, small enough for don't change a lot the angular velocity of rotor around its axis. If the angular velocity around axis X is high, the energy win is Torque by angle, but the energy needed is very low.
« Last Edit: June 12, 2014, 11:29:27 PM by rc4 »

Offline rc4

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Re: Recover energy from gravity
« Reply #108 on: June 20, 2014, 01:18:33 PM »
270 W


Offline rc4

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Re: Recover energy from gravity
« Reply #109 on: June 21, 2014, 05:54:03 PM »
Frequency don't change the final result, even the time to reach 14000 J is the double.

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Re: Recover energy from gravity
« Reply #109 on: June 21, 2014, 05:54:03 PM »
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Offline lumen

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Re: Recover energy from gravity
« Reply #110 on: June 21, 2014, 07:46:07 PM »
Yes! Because precession provides more energy than it takes to run the gyro.
 
If this was not true then this device would not work: http://www.ebay.com/itm/GAVIC-Sports-Gyroscope-LED-Power-Gyro-Wrist-Ball-Birthday-Gifts-For-Men-Him-/141012768553?pt=LH_DefaultDomain_0&hash=item20d5041729
 

Offline rc4

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Re: Recover energy from gravity
« Reply #111 on: June 21, 2014, 08:06:02 PM »
where there is precession, my simulation it's a 2d object, could you explain please ?

I reduced force from spring for control perturbations. Without perturbations slopes of 2400 Hz and 4800 Hz are the same, with 6000 Hz there are less perturbation and the slope is near 2400 Hz.


« Last Edit: June 21, 2014, 11:52:34 PM by rc4 »

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Re: Recover energy from gravity
« Reply #111 on: June 21, 2014, 08:06:02 PM »
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Offline rc4

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Re: Recover energy from gravity
« Reply #112 on: June 22, 2014, 02:14:49 PM »
With 5 axes the system change the sum of energy. Result don't change from 2400 to 12000 Hz.

Offline rc4

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Re: Recover energy from gravity
« Reply #113 on: June 24, 2014, 10:33:16 PM »
range of difference of velocity is very different, logical energy can't be the same from the same torque no ?

 

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