Is there any relationship between torque and speed characteristics of a motor? Can somebody expalin things correctly?
There is definitely relationship between torque and speed of a motor. Torque is inversely proportional to the speed of the motor shaft.
Here is the copy of personal message which I had sent to Deepcut since I felt that he is very much interested in this experiment. I don't claim that what I have written is 100% correct but still it can throw some light on the subject.
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I saw few videos showing 'acceleration under load' effect in which they are using one DC motor, one generator with
some adjustments in coil or core. This generator gains speed of about 200 to 300 RPM when connected to load. I
don't think this is of any practical use because the out put of the generator will still be lesser than the input to the
motor. If you feed the output of generator back to the motor, the system will not become perpetual.
As for my knowledge goes there are two types of DC motors. One is torque motor and the other is speed motor.
In a torque motor the stator magnets will be of lesser strength inorder to limit the back emf in the rotor winding.
This motor develops high torque with less speed.
In a speed motor the stator magnets will be very strong which produces high speed of the rotor with lesser torque.
Even a small force is enough to stop this rotor.
In most of the videos demonstrating accelerating effect, I have observed that they have used torque motors. This
raises (accelerates) the speed of rotor under load to a small extent about 200 to 300 RPM because torque motors
are not designed to run at higher speeds.
I conducted this experiment using a speed motor. For this, I had to remove the existing weak magnet from the
DC motor and replace it with strong, thick magnets without enclosure. Once you convert torque motor to speed
motor, it cannot run under high torque. So it cannot withstand lenz's forces produced in the generator under load.
To compensate this, I reduced the gap between the cores so that the strength of the output current from the
generator goes down thereby reducing the lenz's forces.
Then I coupled the speed motor with generator having minimum gap between successive cores. I raised the speed
of motor to a critical speed by using power from a DC source. When I shorted the output terminals of the generator,
the generator rotor developed tremendous speed with huge noise causing vibration of the entire setup and to an
extent it vibrated the table also. The difference beween noload speed and speed under load was few thousand
RPMs.
If you use a larger diameter rotor in generator, it developes a very strong torque at center with very high speed.
This entire setup of motor and generator can be used as a single motor unit and torque output from this motor
unit has to be coupled with standard, conventional generator to get standard AC / DC power output.
Incase if you don't get sufficient torque output in one unit, you may have to use several such units with torque
from preivious one coupled to successive one with slightly widened gap between the cores and you have to
feed the torque output from the last unit to a standard generator.
The final usable power output has to be got from a standard generator only. Any modification of the standard
generator will not produce the required strong power output. These standard generators have evolved from
decades of research work and they donot have any drawbacks.
It is all not that easy as Mr.Thane Heins thinks. I don't think that his bicycle will ever run!
I had posted this experiment in OU.com under following link. In that I have not mentioned that I have used
a speed motor.
http://www.overunity.com/10774/over-unity-by-reaction-helping-action/msg287484/#msg287484 Sorry for my clumsy english. I hope you will understand what I have written. Waiting for reply.
Regards,
Vineet.K.
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