Recent content by axialflux

Sorry for the super late replies. AmitG: I have one spare motor/controller I would consider selling. You can reach me at: clarkpark@colo.to vanhoivanbinh: Johnny Sun is at <jsun9679@gmail.com> I trust he does not mind me posting his email address here, as he indicated it was OK to include...

After a bit of software and junkyard work I managed to get two of the Yasa motors working in my VW bus. Direct drive using Porsche 930 CVs, battery pack is 10 modules from a Tesla S. More than 800 Nm of torque from each motor: Not dynoed yet, motor simulator plots from Johnny Sun ex-Makani...

And if anyone wants the code and design files for my Makani Metacontroller, it is here: https://github.com/VaslavTchitcherine/Makani-Metacontroller I really wanted to get the Makani codebase (at least the parts I needed to use) running on ARMv7, and spent some time trying to port all of...

I managed to get our Makani motors spinning by building a very simple metacontroller - i.e. controls the Makani controller -that broadcasts omega setpoint messages on the POF network used by the Makani Ozone controllers. (I'd tell a joke here about UDP, but not everyone would get it...)...

Google released all the code for the Makani wind kite project on github. The motor firmware (for the TMS570) runs the Yasa motors, and yes it is "true FOC": https://github.com/google/makani/tree/master/avionics/motor/firmware Very nice code with great comments, as one might expect from a...

SRFirefox: The Makani SiC half bridges are 1700V, not 1200V. I was originally very keen to try an Axiom control board with the Makani power stage. And then Arlin told me the expected price of an Axiom would be $6500 (!). For that price I can buy a Rinehart, a Sevcon Gen 4 Size 10, or any...

HighHopes: Thanks for the answers. For my current sensors I plan to use them single ended with the clever common mode chokes I found in the Makani controller design. I am told these have less than 1 A of noise with the controllers run at 1700V. I posted the schematic in the Makani teardown...

On the subject of the HASS 300-S current transducers (3 phases and DC) used in the Makani Ozone controller: An ex-Makani engineer told me they were getting < 1 A noise, and I wondered how that is possible given they are single ended. The answer is on p.168-169 of...

I am a little undecided as to the best way to proceed. Prior to their release of the motor controller firmware, I began to drink the TI Instaspin-FOC koolaid. But now perhaps I should invest in a TMS570 JTAG probe: https://www.ti.com/tool/TMDSEMU110-U and try to get the Ozone controller...

Hey Fictive: Where did you find the pointer to that Makani document? In particular, what would be really nice to have are schematics and pinouts for the Ozone controller. With that I could just use the existing controllers and I wouldn't have to be screwing around with the TI Instaspin magic...

Great find on that inverter design document. I agree that high voltage will be needed to get high torque from the motor. Rs is about 100 mOhm (Instaspin motor id returns 73 mOhm for one of my motors), so even low voltages enough to push a lot of current into the motor. Am thinking about what...

I've been looking at the Axiom_Rev1_schematic.pdf and have a few questions: 1) On page 12 of the pdf, sheet 0-650V phase voltage measurement using iso amp, where does the AMC1301 get the isolated 5V power needed for the high side power supply VDD1? I can't find VDD1 anywhere else in the...

I recently bought a pile of Yasa motors with custom Makani controllers at a surplus auction, and posted a controller teardown: https://endless-sphere.com/forums/viewtopic.php?f=30&t=108154 Yesterday, Makani open sourced all their code...

We have a lot of these motors and controllers. Am pondering what vehicles to put them in... and how many in each.

Thanks for the observations. I've been able to make the huge Yasa/Makani motors spin using a LAUNCHXL-F280049C with a BOOSTXL-DRV8320RS. Had to completely disable OCP, the filtering on the BOOSTXL-DRV8320RS is crappy and I was getting a lot of false positive OCP faults from the...