Sharing ideas on how to make a more efficent motor using Flyback (MODERATED)

[synchro1]

Hi all

I have tried the 10 ohm scr between the entry of the cap and the assistant coil (X4), the trace is much better but is at no place at zéro volt, so i think perhaps my probes or my scope should be recalibrated, so i stop measuring so small current with my scope to avoid junk datas. If somebody has a better equipment, feel free to follow MH recommendations for the measurement.

So this morning i have tried to get some feeling with my hands, and i decided to place a big ventilator fan on the rotor to significantly increase the mechanical load. So i decreased the voltage to 1.9 volts and i noticed that i had to increase a lot the cap in the flyback circuit (from 0.3 up to 10 uF ) to get the best rotation speed. For info, in this case the " parent " pulse duration in the main coil, is almost the same as the "child" pulse duration in the assistant coil.

So some results on this setup

1- when the main coil and the assistant coil are working together, the input voltage is 1.9 V and the average current is 0.110 A. that is 0.21 Watts and the fan spins at 500 rpm

2- i disconnected completely the assistant coil and flyback circuitery and put away the assistant coil in order to not influence the rotor magnetism.
    - i put a freewheeling diode across the main coil and put the power on. 1.9 volts and average current at 0.12 A that is 0.23Watts to get only 450 rpm.
    - than same setup and i disconnected the diode so the reed switch is strongly arcing  so 1.9 volt at around 0.12 A , that is 0.23 Watts and only 400 rpm

3- I remounted the flyback circuitery but put away the assistant coil from the rotor - in open magnetic assistant C core = 1.9 V and 0.130 A that is 0.247 Watts with 420 rpm
                                                                                                                                    -and than i magnetically closed the C core and 1.9 V and 0.125 A that is 0.24 Watts and 416 rpm

So it seems that the assistant coil bring an strong torque addition in comparison with the main coil alone and for the same or less input power, and it is what is important to me at this stage.

Just for info

Laurent

@Woopjump,

Another video would be appreciated.

[gyulasun]

Hi Laurent,

Thanks for all your efforts and sharing the results. 

Gyula

[gotoluc]

Hi everyone,

here is a new demo video of the GTL Flux Gate with a better comparative test then my first attempt which I deleted.

The test starts with the scale showing the pull force of 2.6Kg from the permanent magnets which are imbedded in the MOT (GTL Flux Gate)

Test 1: I power only the Low impedance coil (0.4 Ohms) with pure DC to establish a baseline to have a comparative for the 2nd test.
Results are: with an input of 2.20vdc @ 4.3a = 9.5 watts, the low impedance coil can alleviate 2Kg of the PM pull force.

Test 2: I power both the low impedance and high impedance coil connected in series (93 Ohms) with the flyback diode connected across the series coils.
Results are: with the pulse circuit at 235Hz / 50% duty cycle with 60vdc @ 0.151a = 9 watts the high impedance coils can alleviate the same 2Kg of the PM pull force.

The results are not as spectacular as I would of hoped for but how can we explain Test 2 with such a high coil resistance to perform the same task with 1/2 a watt less input by adding components that represents only losses. pulse switch, high impedance coil and diode?

Link to video: https://www.youtube.com/watch?v=2k3iGi9VPCU

Luc

[gotoluc]

@ synchro1 and anyone else wanting to debate inductive-kickback related effects.

please stop posting your debates in this topic. citfta has started a topic for anyone interested to do that:  http://overunity.com/16203/inductive-kickback/msg466238/#msg466238

I'm deleting all the new posts that were added after citfta started the topic relating to this debate. 
It's filling up the topic with too many posts that will make it difficult for future replicators.

Luc

[MileHigh]

@Milehigh,

Based on your analysis increasing rotor magnet strength would not improve the "Flyback Motor". What effect do you think placing magnets on the auxiliary coil's ferrite U core would have?

The vast majority of experiments where people place magnets in magnetic circuits as part of a pulse motor setup with the belief that they will do something special or add to the output power are simply wrong.  In the majority of cases they don't test their setup with and then without the magnets in place so they never know one way or the other.  You are also subjecting the magnets to a lot of changing flux and for some magnets you will start to demagnetize them.