Search found 14 matches

by axialflux
Jan 16 2021 12:25pm
Forum: Motor Technology
Topic: Yasa/Makani controller teardown
Replies: 16
Views: 1209

Re: Yasa/Makani controller teardown

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...) Here's a vid...
by axialflux
Dec 12 2020 10:48pm
Forum: Motor Technology
Topic: True FOC: definition and examples
Replies: 77
Views: 5184

Re: True FOC: definition and examples

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 G...
by axialflux
Nov 10 2020 9:16pm
Forum: Items Wanted
Topic: Yasa/Makani controller
Replies: 4
Views: 64

Re: Yasa/Makani controller teardown

Hey @vanhoivanbinh, you can mail me and we can talk about this. We might have a spare Yasa motor. Best email for this would be my handle here, followed by "@colo.to"
by axialflux
Sep 18 2020 12:37pm
Forum: Motor Technology
Topic: Yasa/Makani controller teardown
Replies: 16
Views: 1209

Re: Yasa/Makani controller teardown

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 other contr...
by axialflux
Sep 18 2020 12:24pm
Forum: Motor Technology
Topic: Axiom: a 100kW+ motor controller
Replies: 482
Views: 114149

Re: Axiom: a 100kW+ motor controller

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 thread he...
by axialflux
Sep 17 2020 3:49pm
Forum: Motor Technology
Topic: Yasa/Makani controller teardown
Replies: 16
Views: 1209

Re: Yasa/Makani controller 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 https://storage.googleapis.com/x-pro...
by axialflux
Sep 16 2020 11:58pm
Forum: Motor Technology
Topic: Yasa/Makani controller teardown
Replies: 16
Views: 1209

Re: Yasa/Makani controller teardown

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 board to wor...
by axialflux
Sep 16 2020 4:45pm
Forum: Motor Technology
Topic: Yasa/Makani controller teardown
Replies: 16
Views: 1209

Re: Yasa/Makani controller teardown

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, as edu...
by axialflux
Sep 16 2020 2:52pm
Forum: Motor Technology
Topic: Yasa/Makani controller teardown
Replies: 16
Views: 1209

Re: Yasa/Makani controller teardown

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 kind of...
by axialflux
Sep 13 2020 11:06pm
Forum: Motor Technology
Topic: Axiom: a 100kW+ motor controller
Replies: 482
Views: 114149

Re: Axiom: a 100kW+ motor controller

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 schematic, t...
by axialflux
Sep 12 2020 12:52pm
Forum: Motor Technology
Topic: Makani open sourced motor controller firmware
Replies: 0
Views: 348

Makani open sourced motor controller firmware

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: https://blog.x.company/sharing-makani-with-the-world-the-ene...
by axialflux
Sep 10 2020 6:31pm
Forum: Motor Technology
Topic: Yasa/Makani controller teardown
Replies: 16
Views: 1209

Re: Yasa/Makani controller teardown

We have a lot of these motors and controllers.
Am pondering what vehicles to put them in... and how many in each.
by axialflux
Sep 10 2020 6:26pm
Forum: Motor Technology
Topic: Yasa/Makani controller teardown
Replies: 16
Views: 1209

Re: Yasa/Makani controller teardown

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 BOOSTXL-DRV8320RS gli...
by axialflux
Sep 07 2020 4:29pm
Forum: Motor Technology
Topic: Yasa/Makani controller teardown
Replies: 16
Views: 1209

Yasa/Makani controller teardown

A couple of friends and I just bought a large pile of Yasa motors at Makani's going-out-of-business auction. Makani was a Google X company that spent a lot of money on wind power kites: https://www.youtube.com/watch?v=uBZayX1QlZQ before people realized perhaps that wasn't such a great idea. The moto...