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

[gotoluc]

unfortunately I don't know what threshold and hysteresis adjustments are for

I gave it some thought and threshold could be to adjust at what point the opto's rising voltage you want it to switch on and hysteresis could be the amount of time you want the on time to last.

Do I pass?

Luc

[verpies]

In the first (non adjustable) circuit I see you have 6 opto's... why do I need that if I'm only switching 3 phases?

You don't but the the 4106 chip has 6 channels so I had to draw them.
You can use only 3 channels and leave the remaining channel inputs grounded.

[verpies]

I gave it some thought and threshold could be to adjust at what point the opto's rising voltage you want it to switch on

Yes

Do I pass?

1 of 2

... and hysteresis could be the amount of time you want the on time to last.

No, although hysteresis affects the on-time a little. 
On Diag.17, Hysteresis is the vertical distance between Threshold 1 and Threshold 2.

BTW:  If you connect the conditioned signal from an opto to the 4047 chain, then the on-time of the conditioned signal will not matter anyway, because the 4047 chain pays attention only to the rising edge of this signal and stretches its final pulse width to whatever you set it to with the Width1 pot.

[gotoluc]

Thanks verpies for making everything clear

You're a good teacher!... I've learned more in the past few weeks with your component suggestions and explinations then I have in years.

I appreciate your help

Luc

[itsu]

I finally completed the "pulse sequencing circuit" as designed by verpies here:

http://overunity.com/16167/sharing-ideas-on-how-to-make-a-more-efficent-motor-using-flyback-moderated/msg470273/#msg470273

The resulting diagram is slightly different due to some inferior components (zeners), so we had to add an extra MOSFET (Q5), see below diagram.


The goal was to have a circuit which smoothly controls a pulse motor and to manipulate/calculate the flyback spike from the rotor coil (L1) to be able to put it to good use lateron.

For now we settled for each cycle to:

# short out the capture capacitor C2,
# capture the spike in this emptied capacitor C2
# measure the recovered voltage in this capacitor.

Verpies also designed a spreadsheet with a pie chart which, after plugging in the measured data, visually shows the measured data
and calculate the energy distribution in this pulse motor including the recovered energy in the C2 capacitor.

Be aware that its an European based spreadsheet, so the decimal point is a comma!

I made a video which in 4 pieces shows/explains:

# the diagram and physical setup
# the controls/signals of the 4047 chips
# the signals (voltage/current/timing/capturing) on a running system
# the input power measurements for inputting into the spreadsheet for a running system.

video here: https://www.youtube.com/watch?v=UlEl1V44pPE&feature=youtu.be

Below screenshot 1 is the partial (on time only) input power measurement on a running system
Below screenshot 2 is the partial (on time only) input power measurement on a stopped system

The first picture is a snapshot of the spreadsheet made with the above inputted data and shows the energy distribution in a running system.
Note that the energy which is unaccounted for is probably mostly the kinetic energy stored in the running rotor, but this would be very hard to measure (and thus account for).

The second picture is a snapshot from a stopped system where there is much less unaccounted for energy.

A big thanks to verpies for designing the circuit, the spreadsheet and to assist in ironing out the encountered problems.
Hopefully we are able to further zoom in on certain energy streams and to put the captured/recovered flyback  pulse energy to good use.


Regards Itsu