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

[citfta]

Looking good Luc.  I really enjoyed the video.  It was very informative.  I suspect you are not getting a lot of comments on this thread because most of us like myself feel anything we could add would not be any better than what you are doing so we just watch and read.  I am looking forward to your next steps.  My own projects have usually shown it is more beneficial to use the flyback to charge a battery.  But your builds are much better than mine so you may find it more beneficial to use them for the assist motor.  So no bets either way from me.

Carroll

[gotoluc]

Looking good Luc.  I really enjoyed the video.  It was very informative.  I suspect you are not getting a lot of comments on this thread because most of us like myself feel anything we could add would not be any better than what you are doing so we just watch and read.  I am looking forward to your next steps.  My own projects have usually shown it is more beneficial to use the flyback to charge a battery.  But your builds are much better than mine so you may find it more beneficial to use them for the assist motor.  So no bets either way from me.

Carroll

Thanks Carroll for the appreciation and taking the time to write a few lines.

Well, we'll soon find out what's best to do with flyback. I don't know the answer yet! so even I wouldn't know what side to bet on.
I'll just give it my best shot and we'll see what happens.

Luc

[gyulasun]

Hi Luc,

I just noticed your comment under the youtube video you did a quick test with the stock motor run with one phase and got about the same power differences. This is good to know too.

Just an observation: it is interesting that the modified motor did not maintain the same input power draw with the one phase drive like it did with the three phase drive. I mean the test you reported in Reply #808 where there was no change in input power when the alternator was put under load.  Or the much higher RPM (at about 1800) in that 3 phase test can explain the no change I wonder (coils inductive reactance are higher at higher RPM).

Thanks
Gyula

[gotoluc]

Just an observation: it is interesting that the modified motor did not maintain the same input power draw with the one phase drive like it did with the three phase drive. I mean the test you reported in Reply #808 where there was no change in input power when the alternator was put under load.  Or the much higher RPM (at about 1800) in that 3 phase test can explain the no change I wonder (coils inductive reactance are higher at higher RPM).

Thanks
Gyula

Hi Gyula,

the reason for that is I wanted to keep RPM the same between the stock motor and mod motor.
The stock motor monitors the rpm, so when a load hits the shaft it instantly dumps more PWM pulses (more current) to maintain the rpm.
The mod motor has a fixed pulse width (current) that I manually adjust and why I had to stop the camera recording to add the load and readjust the pulse width and voltage so it could maintain the same rpm under load as the stock motor so we have a comparable test.

Hope this clears it up?   let me know if there is anything that does not make sense.

Luc

[gyulasun]

Hi Luc,

That has been okay what you wrote as the reason, I just wanted to draw attention to the lack of similar behavior for the modified motor i.e. the power draw increased when you loaded the alternator while the power draw did not increase in the earlier test of the modified motor when you loaded its shaft with the alternator. And the difference between the two tests was only in the RPM and in the number driving phases. This is all I wished to point out.

Gyula