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

[gotoluc]

Let's have some fun and put this to bed. You up for a challenge Brad?

I challenge you to an efficiency battle using only flyback from a coil. You stick with your iron core coil and rotor of magnets, and I'll use whatever coil I choose, but with no rotor, and no resonant tank. What do you say?

Let me know if you're up for it, then we can agree on some goals for the challenge. 

oh, oh, oh, can I play too?

[verpies]

BTW, I have your circuit on a project board ready to test.

Looks well.
It seems that you run out of the yellow jumpers.

I have to ask Grumage to make me a machine to strip and bend those jumpers with an adjustable length.

Now, is there a way we can use this in our favor before they remove consumer access to Finmet cores?

I would have to think about it how they would behave in the classical Magnetic Amplifier application and go from there.

Do I need any caps on the MIC4451YN mosfet drivers chip?

As usual, it is a good practice to have additional ~0.1μF power supply decoupling caps between power supply pins (pins 7 & 14) of these 4047 chips and the power supply pins of MOSFET drivers, but I almost never draw these decoupling caps on schematics unless their absence is known to cause problems.

Will the 5vdc input be enough for the MIC4451YN MOSFET drivers to switch the MOSFETs on?

Only with the so called "logic level" MOSFETs and I don't think yours are one of those.
If I were you, I'd go for the standard 12VDC power supply to drive the MOSFETs hard and give the MIC4451YN drivers separate power supply lines (see the Starpoint below) so they don't spike-up the 4047 chips.
Take example from Itsu - he must be doing something right if his waveforms are so clean...

[poynt99]

oh, oh, oh, can I play too?

Sure.

[tinman]

No, I didn't but evidently you were first with this line of thinking.

Magluvin also:

Really?

Myself and Luc have been saying this for weeks,and Poynt finally thinks there may be a way that the inductance of the coil can be increased by way of a PM's field,and he is the first in this line of thinking???.

I have shown my DUT,and how it is set up right from the start of my thread. I posted a quick test carried out showing where the south magnetic field of the rotor magnet was in relation to the coil which created a north field at the rotor end when switched on. Is it not clear that the core of the coil would have that south magnetic field induced into it before the current started flowing through the coil,and that the field in the core would flip from south to north when the transistor was switched on.

For weeks now we have been trying to tell you this is why the P/in is reduced,and the P/out can remain the same,and for the same amount of time MH and Poynt have been saying it is because of some fantasy revers voltage that you cant see is the reason for the effect. Only now dose Poynt work out how this might be the case,and he is the first with this line of thinking?--!!really!!.


So often we see the little guys discovering effects like this,and the so called big guns taking credit for it.

Well Luc showed it in 2011,so you EE guys are only 4 years behind.


Brad.

[tinman]

Let's have some fun and put this to bed. You up for a challenge Brad?

I challenge you to an efficiency battle using only flyback from a coil. You stick with your iron core coil and rotor of magnets, and I'll use whatever coil I choose, but with no rotor, and no resonant tank. What do you say?

Let me know if you're up for it, then we can agree on some goals for the challenge. 

My reply to Poynt from my thread.


Sure-you know me-I never back down from a challenge.

But first you must finish the challenge you have already voluntarily half completed--> and that is to get your simulated setup to replicate my results from my DUT. That is-to get the output current-power to increase when the input current-power is decreased.
Once you have answered and completed that challenge you put upon your self, then we can set the ! Apples for Apples! parameters for the next challenge.

You will of course be required to build an actual device for the next challenge-as I do. And you will be required to post a video here on this thread of your device under test, and the results obtained from that test during the video--> as I do.

So yes, im up for the challenge as long as we are on equal ground.