My Spacelab Entry - A brushless motor in space

[nikmods]

Hey guys

I entered into the spacelab competition on youtube with the idea of using a brushless motor in space (well the principle at least).

Tell me what you think and support if you like

Thanks

[xygax]

The princable can be provenon earth by using a vaccum chamber as the effect of evacuation will reduce the viscosity of the enviroment. However the speed of rotation is directly proportional to the frequency of injection so you can double the speed purely by increasing the frequency of the injected power to 100Hz

However maybe consider using a pair of superconducting magnets so that they will reduce the friction to zero (its a known property of superconducting magnets they will repell to a level where they float consistantly. This would also reduce the energy requirement to modify the field already generated by the superconducting magnet rather than having to generate the entire ac field.


Steve

[milly0812]

Huh ? :-/

[Grasshopper]

Yah canee change the laws of physics.....

[cjcj1949]

What is the theoretical basis for the reduction of vicosity? How much will the viscosity be lowered and how will you measure it? You should see a small reduction in current if the viscosity is lowered, but this will depend on the air resistance of whatever it is you are turning. You don't seem to have fulfilled the first concept of an experiment. You need to make a prediction and then design a measurement system that is accurate enough to measure the prediction. Perhaps studying the design of a viscosity meter might help. That is the second guiding principle. Find out what others have done and use it as a starting point.

As xy points out, a brushless motor runs at a fixed frequency, unless you are talking about a different ac motor that has slip. Our motors do slip if you load them enough, but we have a technical term for that called bogging, I believe.

[nikmods]

im looking at the effect of no gravity on the magnet as that would reduce it's rotaion rate and also induce more from the solenoid(potentially).