I think a retro fit should be possible as the through hole PCB contains necessary systems (I mean no matter what you need power supplies, output stage with drivers, current sensors etc). It would be something like this though: to make a translation of a 64 pin TQFP plus the additional analog processing down to the 40 connections of the DIL package (the 40 pin DIL has connections to all necessary signals, also for what I'm building now... well so far at least).amberwolf wrote: ↑Jun 30 2018 9:12pmI still haven't finished building the old version of the controller...and now you have started the ideal version of what I'd like to have on the trike.
Well, I'll finish the ones I have and see how they're doing, then when you finish this design I'll see if there's any way to "patch in" the new brains into the old controllers....
(unless the MCU for the new brain could possibly be "plugged in" (with an adapter?) to the old brain board design. (the one from Whereswally) Somehow I doubt it would be that easy.)
I'm ok with that. I don't have any particular space or shape limitations atm, since these are my SB Cruiser trike controllers.Lebowski wrote: ↑Jul 02 2018 12:42pm
I think a retro fit should be possible as the through hole PCB contains necessary systems (I mean no matter what you need power supplies, output stage with drivers, current sensors etc). It would be something like this though:
to make a translation of a 64 pin TQFP plus the additional analog processing down to the 40 connections of the DIL package
That's ok, too--I'm a long way off from a complete controller build.But to go from where I am now to a complete controller IC is still a long way of...
I think once its out there and indeed does what people want, you're correct, everyone will try to reverse engineer it and some will succeed. And then you'll start seeing more controllers with this feature...spinningmagnets wrote: ↑Jun 30 2018 8:56amI would love to see this development spread to every available controller as an option. However, I must be realistic when I state that any new development that is useful will be reverse-engineered and copied. So...your first controller model must be the most profitable to you. 48V/52V providing 60A in a small form factor IMHO is the sweet spot for Version-1
I looked at this video and it is indeed the integrate voltage to get flux method. I think a good method for when you are 6 stepping, nothing wrong with it.... well as an analog engineer integrators are kind of scary in a sense that you always have input referred offset and the thing always runs away. If you build custom chips like TI does then there are many tricks to keep the offset of integrators extremely low and to get it to work. But it will not work at standstill. TI also mentions in the comments that this is not their standstill FOC method...emmgee wrote: ↑Jul 03 2018 3:09amI wish I knew so much about physics, electronics etc. to push things further than global companies like Texas Instruments are capable.
Just fyi: I stumbled across a video explaining the TI Instaspin technology, I think I haven't seen it on the forum yet: https://youtu.be/szgVUfyX8JM
Impressive how accurate it tracks the position. Awesome!!