Simple Experiment: Extraction of Energy from Permanent Magnets

[Acca]

Luc at least you should see some of these video clips as you have no time .. so what do you want ?


Proof of what !        ....






I have "spent my time here" to find the right material for this post.. I did have time today ..


Acca..

[telecom]

Hi I've used the calc which was pointed by gotoluc:
Voltage across capacitor   
7
(V)
Capacitance   
2200
(uF)
Load Resistance (Optional)   
6
(Ohms)
Compute

Result:

Energy   
0.0539
(Joules)
Time Constant   
0.0132
(seconds)



Using law of  conservation of the momentum for the magnet with the weight of 1 kg and repelling force of 10 kg (100N), I get:
M = F x T = 100 x 0.0132 = 1.32 Nm
The speed for the weight of 1 kg will be
V = M/m = 1.3 m/sec
Kinetic energy = mV2/2 =0.8 J

Where energy of the coil was 0.05 J

[MileHigh]

Tap into the energy. 

[Vortex1]

Permanent Magnet DC motors are now pushing 95% efficiency.

By the line of reasoning that Permanent Magnets in and of themselves are a source of energy, you would think that doubling the strength of a magnet in a good high efficiency P.M magnet motor would double the efficiency, possibly pushing it over 100% efficiency.

It does not.

It only gets you a little closer to 100%

If we put 745.699 Watts into a 95% efficient PM DC motor we get exactly 0.95 HP output. Input power x efficiency neatly matches output power.

If we double the magnet strength, we may go to 96% or 0.96 HP output.

So where is the power coming from if we can account for the fact that nearly 100% of the motor horsepower relates exactly to the input power, what part are the magnets actually contributing? It is coming from the power source input, since we can account for nearly all of the input power  as directly related to the output shaft horsepower.

More powerful magnets, better steel, lower resistance windings, less friction in the bearings all get you closer to 100% efficiency but not over 100% with current designs.

The magnets are part of the structure (system) required to make the machine efficiently transform electrical power into mechanical horsepower. So are the steel return paths and copper windings, shaftbearings etc. Are they also a source of energy? Not as used in a motor. They are a contributor to higher efficiency when well designed.

Reducing the thickness of the copper windings results in more heat loss, increasing the thickness results in less Joule loss and higher efficiency.  So is thicker wire contributing energy? No, it's just shifting the input energy into HP rather than waste heat

All of these factors when optimized push us close to 100% efficiency.

If we want to extract energy from magnets in a motor design, we will have to think about it quite differently.

MH good to see you back, you were missed.

BTW my guitar amp goes to 11 

[sm0ky2]

The energy is not in the magnet it is in the field response.
Stronger field, stronger response.
Same energy, less waste.