[TheForge] Fwd: Shop tools & layount (3-phase converter)

[Steve Smith]

xlch58@swbell.net wrote:

> OK, after a lot of reading and thinking, I see you are right.   The bars 
> in the rotor cut the flux of the three-phase windings of the idlers 
> stator field,  inducing a counter electromotive force.  These voltages 
> (seperated by 120 degrees due to the spacing of the windings) would 
> affect the line voltages being passed to the load motor, at the very 
> least as the union of the input(utility) wave and the induced wave.   I 
> should have thought about this earlier as I have read before where  
> three phase motors on three phase are designed to minimize the 
> interaction of the phases through CEMF.    This would mean that  for 
> optimal performance you would want a rotor with the bars running slight 
> off of pure axial.     It is confusing reading the literature, since it 
> all focuses on the generated third leg, generally stating that the first 
> two are passed straight from the utility.  They are passed from the 
> utility, but the converter has an effect on them.  Fitche's circuit 
> maximizes this affect and cleans up the waveforms.   This also explains 
> why additional motors on the circuit help matters as each of them is 
> producing the same CEMF.   Well,  back to blacksmithing......
> 

I couldn't figure out a clear way to put it, good that you did. Almost 
flunking my motors class way back when probably has something to do with 
it...

Steve