Tinman's coil shorting circuit

[Magluvin]

Thats correct. In fact, it increases motor action when the generating coil is loaded-and by a large amount-while at the same time , power consumption decreases by at least half.
If you can work out why that is, then you will work out the rest of it.

Hey Brad

Thanks.  Will ponder that for a bit.

Mags

[Reiyuki]

The first part of the operation is simple-the magnetic field on the rotor is attracted to the steel cores of the stator. The part no one can answer is this-why dose the RT speed up when a load is placed across the stator winding's?. This should cause an apposing magnetic field,and the rotor should stop. Thing is,it dose, if the current is drawn from the stator coil in one direction. But if the current is drawn from the stator coil in the other direction,then the RT speeds up<-- this is the part no one can answer-why. The answer is quite simple if you take a close look at what is happening within the workings of the RT.

I'll take a stab at it, the answer is basically 2-part:

First, the magnet creates an opposed magnetic field in the iron stator as it approaches (the reason why the stator is attracted to the magnet in the first place).  When you apply a load, it must first counter this temporary magnetic field before being affected by the rotor's field.

Second, when you short the coil, you are saturating the stator, changing its permeability and thus its attraction to the magnet.  The magnet attracts the stator until TDC, then it 'disappears' and slips out because of the change in permeability.

So, a strong load applied near TDC saturates the stator and lessens the attraction between magnet and stator.  Ironically making it more efficient the more load you put on it, to a certain point.

[verpies]

... applying a load to the stator doesn't impede motor action.  Il see if I can figure it out.  Thanks

Actually when external DC power supply is applied only to the rotor, its rotational direction can reverse at some loads applied to the stator.
Direction dependent on load - how do you like them apples?

[shylo]

This site is fucked some kind of malware is preventing me from mreading and posting

[shylo]

well apparently that worked