6x6 Max

[Kevin Sharpe]

I've moved this thread into 'projects' because 'general' is getting unmanageable

[kiwifiat]

Sorry, can't help with component values, but here is the schematic from johu's github:

res.jpg

Doesn't seem to be connected to any STM pin, wonder what that pin marked as "exciter" does on blue pill.. Anyway, maybe these posts would be better of under the appropriate thread.

The circuit TheSilverBuick posted is for level shifting the Prius current sensors so they are compatible with the ADC converters on the STM32.
TheSilverBuick can you please clarify if you are trying to build a current sensor conditioner or a resolver driver?

[TheSilverBuick]

The answer is both.

The obsolete Damien blue pill board for the Gen2 Prius inverter did not have a resolver exciter circuit, and the two current inputs cannot take the Toyota outputs directly, so need to be conditioned.

The voltage divider circuit looks straight forward enough, but the resolver exciter/driver schematic looks daunting for my skill level. I'm mulling over attempting it versus simply purchasing a Yaris board for my other inverter.

[kiwifiat]

The answer is both.

The obsolete Damien blue pill board for the Gen2 Prius inverter did not have a resolver exciter circuit, and the two current inputs cannot take the Toyota outputs directly, so need to be conditioned.

The voltage divider circuit looks straight forward enough, but the resolver exciter/driver schematic looks daunting for my skill level. I'm mulling over attempting it versus simply purchasing a Yaris board for my other inverter.

Contact Arber333, he designed a board for the resolver exciter/driver and he may still have some bare boards for sale. Johu posted an updated variation that eliminated the voltage reference I used in my design for the current sensor conditioning. I would use his schematic.

[TheSilverBuick]

So after some thought and more reading, I'm still going to try my hand at the blue pill board with the Gen2 prius inverter and toyota MGR.

I've made the order to Digikey for the parts, have an STM32 chip and programmer on the way. I got the Wifi chip a while back. Arber333 says he has one more exciter board, so working on getting it.

Now the remaining questions on the voltage divider for the two current sensors that I've bolded below. Thanks!

Two questions on the circuit posted by kiwifiat, what is the part number for U1? And what wattages are recommended? I would think lower if fine in this application, but not certain. It is also referenced later that C1's rating needs to go from 1nF to 100nF.

The Prius Gen2 current sensors are bipolar 15Vp-p, not 10V or 7.1V. Use whatever you like as the 1.65V reference, what is critical is the OP amp output does not saturate as in the case of FOC accuracy of the current input is important to the control algorithm :

Side note, I've picked up a 30v PSU and dug out an old oscilloscope that I had stuck in a closet for ever. Waiting on some new leads to see if it still works.

[Isaac96]

I didn't design that circuit, nor do I often use op amps. But I'd get an LM324 - it's a quad op amp (and you need at least 2 for your sensors). It has good input voltage range so you should be fine.

-Isaac

[TheSilverBuick]

I didn't design that circuit, nor do I often use op amps. But I'd get an LM324 - it's a quad op amp (and you need at least 2 for your sensors). It has good input voltage range so you should be fine.

-Isaac

Thank you!

So with that chip, I would build two sets of circuits, each passing through the single chip, effectively utilizing half the LM324? That sounds straightforward enough.

[Isaac96]

Yup, sounds good. The single chip cuts down power wiring, which might help the signals look cleaner. Just make sure not to cross the outputs or something--pinout is straightforward but doesn't follow the usual standard of one corner ground, other corner 5V.

[TheSilverBuick]

Since I don't know "usual" that assumption shouldn't bite me Thanks!

[arber333]

For the purpose of the 6wheeler ATV i would suggest you get a Buick lacrosse ACIM motor and use it for test bed.
It should provide 18kW for your ATV and you can easily adjust belt drive...
It is also a good unit to learn basics of resolver control. I have one here and I need to test how resolver works with ACIM sine code.
Mr. Kelly has also dissassembled one on youtube .


And i found another DIYer here:
https://endless-sphere.com/forums/viewt ... +generator

[TheSilverBuick]

Thanks for the recommendation, but the transmission in the 6x6 was my main problem, I got the 2-stroke to run alright, so using an electric motor and keeping the belt would not solve my issues with the 6x6 Plus you mentioned it requires fairly high voltage worth of battery to make it run, and I'm not sure I'll have that much battery power any time soon, or even on the 6x6 itself. There is a guy on a Facebook group I'm in with a 6x6 that would like to just replace the engine and keep the belt, so I'll pass the recommendation on!

[arber333]

Thanks for the recommendation, but the transmission in the 6x6 was my main problem, I got the 2-stroke to run alright, so using an electric motor and keeping the belt would not solve my issues with the 6x6 Plus you mentioned it requires fairly high voltage worth of battery to make it run, and I'm not sure I'll have that much battery power any time soon, or even on the 6x6 itself. There is a guy on a Facebook group I'm in with a 6x6 that would like to just replace the engine and keep the belt, so I'll pass the recommendation on!

True, but i think it is not such a HV at all. Maybe 120Vdc...
In any case Openinverter should work with it just fine.
https://endless-sphere.com/forums/viewt ... +generator