Quote from: neptune on July 14, 2011, 10:42:28 AM
Finally , are you coils connected in series adding ? Could you just remind us of the spec of the coils as in wire size , number of turns , single or multifilar  please?

The coils are connected in series bucking.  I had tested with series adding first and saw that I was building a conventional generator.  When I flipped one coil in a pair over to bucking, I was pleased to see that the voltage stayed about the same (edited to add:  Actually, I think it should have doubled and probably did).  But of course no conventional current should flow, right?  But current definitely does flow.

Coils are monofilar, ~200 turns, 24 AWG, wrapped on Singer type 15 sewing bobbins.  I wrapped one coil while trying to count the turns initially.  But I admit that I may have miscounted a bit.  To match the coils I unwrapped that first coil and measured the wire length.  I have measured out that exact length and wrapped all subsequent coils similar wrt to wind direction.

I am still unsure if these coils can be used for looping.  I am testing now to see the maximum power the system can output.  It may be that these coils would need to change to a smaller diameter wire to increase the number of turns.  But since that adds resistance I am not willing to go that route without fully testing what I have first.

Quote from: neptune on July 14, 2011, 10:42:28 AM
In the yellow chart above , are you measuring the output of a single coil , a coil pair or all the coils ? As you decrease the load resistance , the output watts increase . But it is evident that you have not yet reached the optimum resistance , which looks like it needs to be still lower . Of course what really matters is the load that gives the best input to output ratio . Excellent work , by the way .

The data presented is from three coil pairs mounted 120 degrees apart and connected parallel after the FWBRs.  The system is currently running while still set up with resistance from the last measurements.  I hope to pick up where I left off later today.  Unfortunately it is not always possible to join separate data sets due to differences related to the temperature of the environment during testing.  But maybe today will be the same as yesterday or weather may not be such a large factor in this testing range.

Quote from: mondrasek on July 14, 2011, 11:12:47 AM
The data presented is from three coil pairs mounted 120 degrees apart and connected parallel after the FWBRs.  The system is currently running while still set up with resistance from the last measurements.  I hope to pick up where I left off later today.  Unfortunately it is not always possible to join separate data sets due to differences related to the temperature of the environment during testing.  But maybe today will be the same as yesterday or weather may not be such a large factor in this testing range.

  I'm trying to follow this work, and thank you for all this effort, mondrasek!

Is your "input power" really "0" as shown in your table?  or is this just not measured as yet?  sorry, I think I've missed something important here, so I ask.

Quote from: JouleSeeker on July 14, 2011, 12:55:32 PM
Is your "input power" really "0" as shown in your table?  or is this just not measured as yet?  sorry, I think I've missed something important here, so I ask.

It is not zero.  Sorry if this confuses anyone.  The spread sheet is just calculating the value of zero since the equation for input power is Vin * Iin and those values were not measured.  I stopped measuring Vin and Iin because I was getting an RPM increase and input current increase whenever I tried to measure with my DMM.  But I have not confirmed if that happens across the entire resistance range from this test so I will try again.  Input circuit power measurements are necessary to compare to the maximum output of this setup with just three coil pairs to determine if there is enough o/p to try looping by adding the remaining six coil pairs.  If the o/p is not large enough at the optimal load or matched to the load of my drive circuit then I will have to try improving the coil design.

here's a coil I made, I havent tried it on a pmotor but if I run current through the coil as shown it cancels the coils field but doesnt short the coil.  if reversed the coil puts out a good field.
just something that might help.

dave