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

[gotoluc]

Hi everyone,

thanks for all your suggestions.

@verpies, the encoder sounds like the better way to go but then the problem is me not knowing how to program them becomes the next issue.

As for the ESC's recommendations. I am aware and have some that I tested. The problem with them is they output multiple on times operating at high  frequencies between 8kHz to 20kHz and also reverse phases (AC). How do you capture flyback with such switching conditions?

For now I'll stay with my simple plan of using the 3 optical switches. However, I do have a question for verpies about my TCRT5000 optical sensors.
Can the photo-transistor of the TCRT5000 be good enough to trigger the 4047 chip directly, or would the photo-transistor need to trigger a transistor which will then trigger the 4047?

Thanks for everyone participation.

Luc

[verpies]

@verpies, the encoder sounds like the better way to go but then the problem is me not knowing how to program them becomes the next issue.

Yes, that is a problem if you are using a microcontroller (MCU) ...unless someone sends a programmed one to you.
The alternative to MCU is using several of these CMOS chips and programming them in hardware with jumpers and BCD switches ...without software.  I already know you can do it that way, but I don't know if it is any fun for you.

I do have a question for verpies about my TCRT5000 optical sensors.  Can the photo-transistor of the TCRT5000 be good enough to trigger the 4047 chip directly?

Maybe.
The amplitude of the photo-transistor is strong enough to drive the the 4047 with a 1k pullup resistor, but the rise/fall time of its pulse might not be fast enough.  Doing it "by the book" requires a Schmitt trigger such as the 4106, that "squares up" a slowly changing signal.

[gotoluc]

Yes, that is a problem if you are using a microcontroller (MCU) ...unless someone sends a programmed one to you.
The alternative to MCU is using several of these CMOS chips and programming them in hardware with jumpers and BCD switches ...without software.  I already know you can do it that way, but I don't know if it is any fun for you.

I don't think that's my kind of fun!... but I appreciate you bringing it up and who knows, maybe for a larger version if this test device proves to have an advantage.

Maybe.
The amplitude of the photo-transistor is strong enough to drive the the 4047 with a 1k pullup resistor, but the rise/fall time of its pulse might not be fast enough.  Doing it "by the book" requires a Schmitt trigger such as the 4106, that "squares up" a slowly changing signal.

Will these work the same? http://www.ebay.com/itm/221769763079
If so, could you please draw me a schematic starting with the TCRT5000 to CD40106 to HCF4047BE with all components needed in between so I can order it all one time.

Thanks for your help

Luc

[verpies]

I don't think that's my kind of fun!

You don't know what you're missing ;(

Will these work the same? http://www.ebay.com/itm/221769763079

Yes, but I'd have to draw a different schematic diagram for the 40106, since 40106 are not the same as 4106 (the former are inverting and the latter are not).
That is of course if you choose to build a circuit that uses one of them.

If so, could you please draw me a schematic...

Below are two ways of conditioning the signals from your optos - one is adjustable and the other is not.
Both circuits are using only one chip (4106 or AD8032).

[gotoluc]

You don't know what you're missing ;(
Yes, but I'd have to draw a different schematic diagram for the 40106, since 40106 are not the same as 4106 (the former are inverting and the latter are not).
That is of course if you choose to build a circuit that uses one of them.
Below are two ways of conditioning the signals from your optos - one is adjustable and the other is not.
Both circuits are using only one chip.

Thanks verpies for the new circuits.

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?

The second circuit, unfortunately I don't know what threshold and hysteresis adjustments are for or what they would affect when adjusted?
Care to explain in a simple lawmen way.
EDIT I think I got it, see below post.

Thanks for all your help

Luc