What happens when OU is reach?

[Low-Q]

Say you have motor that runs by its own power source. That motor should then speed up continously. What happens when speeding up? More energy applies the motor. The more energy, the faster it will spin. When will it stop accelerating? Will it, or will it not stop acellerating?

It's time to be prepeared to the day when a real selfrunner is born. What if the whole thing exploded - I guess it's a good thing to be prepeared for that moment.

Any points of view?

Br.

Vidar

[gyulasun]

Hi Vidar,

Yes, if there is no any control for a possible runaway, then your example motor will ruin itself within moments, depending on its rotor mass and the amount of the extra power it (hopefully) would give out.

Assuming here your example, the motor should be fed from a voltage stabilizer of appropiate wattage capability and the input of this stabilizer would receive part of the output voltage a generator would produce, driven by the electric motor. This way the motor would receive a steady/stabil input power, regardless of its output load changes.

So there should always be some means used for keeping a system under control that is supposed to produce extra power output.  Without such means, such a system either stops (due to lack of matching conditions or runs away into self-destruction.  OF course a situation can easily occur when the extra output is just enough to maintain the rotation of your example motor and no runaway occurs.

People tinkering towards extra output goals should think about this and be able to include a proper control means in their devices.

rgds,  Gyula

[Honk]

I don't think a OU motor will spin out of control.
It still has to obey the laws of torque and speed.

Meaning:
A motor have Maximum Torque when being stalled to Zero RPM.
A motor have Zero Torque at maximum Free Spinning RPM, but the top speed is limited by friction and airpressure.
A motor delivers Half the Stall Torque when being loaded down to Half the Free Spinning RPM.
At this level a motor can deliver Great Powers at Good RPM. This is the most efficient working point.

[seekingknowledge]

thats why we make an off switch just incase.

[b0rg13]

youll know when its reached and its working for the majority of us as in powering our homes and running our cars, youll get a monthly bill just because they can send you one, and youll get another bill from the gps in your car for the distance you traveled  , thats what happens.