Jure M
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Developer
Andrew Tridgell commented on Jure M's blog post Upgrading skywalker X8
"interesting! how do you do the rotation to a particular angle? I can see how you would know the angle relative to power-on, but how do you know the power-on angle of the props?"
Mar 22, 2016
Jure M commented on Jure M's blog post Upgrading skywalker X8
"Hi Hugues, here's some info on FOC, with comparision to block commutation (method that is used on almost all ESC's): link. It has benefits, one of which is that you can precisely position the rotor :), and with today's…"
Mar 22, 2016
Jure M commented on Jure M's blog post Upgrading skywalker X8
"Hi Marc, commercialized maybe someday in the future, but I don't know if there is a market for over-the-top ESC's with 300A MOSFETs :). Communication right now is RS485 with dynamixel ver.2 protocol. There is CANBUS hardware on the board…"
Mar 22, 2016

MR60
Hugues commented on Jure M's blog post Upgrading skywalker X8
"What are the advantages of FOC motor control versus calssical ESC function, in our drone applications ?"
Mar 22, 2016
Maxime C commented on Jure M's blog post Upgrading skywalker X8
"Hello I am very interested in this great idea, since I am myself into developing hobby ones!http://diydrones.com/forum/topics/quad-motor-on-a-mechanical-arm-2-... Can you disclose the type of servo you are using as well as the feedback system? Read…"
Mar 22, 2016
Nick Arsov commented on Jure M's blog post Upgrading skywalker X8
"Hi Jure, Do you use Hall sensors for rotor positioning? BR Nick"
Mar 22, 2016
Marc Dornan commented on Jure M's blog post Upgrading skywalker X8
"I had to watch a few times before I got this. Brilliant. So it seems you have achieved your home brew ESCs with FOC control. Are these going to be commercialized? What are you using? CANBUS?"
Mar 22, 2016
Jure M posted a blog post

Upgrading skywalker X8

A while ago I posted about ESC I was making with FOC motor control.Now it was time to mount it on something. In the video propellers are 7 inch plastic, I decided that it is too dangerous to have three 15 inch CF props spinning in confined space where I have nowhere to run should something go wrong.Video shows arming the system when propellers are aligned (so they don't scrape on the floor), rotors tilted to 0 deg and then to 90 deg vor vertical takeoff/hover, motors run for a few seconds and…See More
Mar 22, 2016
Jure M commented on Andrew Tridgell's blog post Building, flying and crashing a large QuadPlane
"It's the same configuration, except that I am using these motors for propulsion and these servos for tilting. Unfortunately electronics in servos is not exactly reliable and one of the motors died on me, so I made my own…"
Mar 4, 2016
Jure M commented on Andrew Tridgell's blog post Building, flying and crashing a large QuadPlane
"I'm building a tricopter/plane hybrid from X8 flying wing. And one thing that I don't want to happen is to have to redesign everything because I chose to use components with inadequate power. So for planned weight of ~6 kg there will be…"
Mar 4, 2016
Jure M commented on Andrew Tridgell's blog post Building, flying and crashing a large QuadPlane
"So 8S battery gives you ~30V, @30A this is 900W on each ESC/motor. If we assume 95% efficiency for motor and ESC, you get 45W on ESC and ~45W on motor. If each FET dissipates equal amount of heat, we get 2,5W on each FET. With the setup that this…"
Feb 27, 2016
Jure M commented on Gerard Toonstra's blog post Opensourcing ESC work
"FPU is good as you can write code with SI units (e.g. you can have current in amperes, voltages in volts, speed in RPM etc), which is not really efficient on fixed point uCs, but if you use manufacturers libraries for FOC, which are optimized to…"
Jul 15, 2015
Jure M commented on Gerard Toonstra's blog post Opensourcing ESC work
"What were the simptoms of the failures? I hand-made ~5 or 6 boards and had no problems with any of them. Have you considered using libraries for FOC? I am using Freescale's and got motor turning over a weekend."
Jul 14, 2015
Jure M commented on Gerard Toonstra's blog post Opensourcing ESC work
"Question, how did you solder DRV830x's? It is importaint to solder exposed pad to ground plane, otherwise it will not work properly."
Jul 14, 2015
Jure M commented on Nathan Rae's blog post Invalidating Amazon's Drone Mapping Patent
"Check this article on how to fight patents: Ask Patents."
Jun 17, 2015
Jure M commented on Nathan Rae's blog post Invalidating Amazon's Drone Mapping Patent
"Check this article on how to fight patents: Ask Patents."
Jun 17, 2015

Profile Information

About Me:
Electronics engineer
Please tell us a bit about your UAV interest
Build X8 VTOL
Hometown:
Slovenia, Europe

Jure M's Blog

Upgrading skywalker X8

Posted on March 22, 2016 at 10:00am 7 Comments

A while ago I posted about ESC I was making with FOC motor control.

Now it was time to mount it on something. In the video propellers are 7 inch plastic, I decided that it is too dangerous to have three 15 inch CF props spinning in confined space where I have nowhere to run should something go wrong.

Video shows arming the system when propellers are…

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ESC with FOC and sensor - why not

Posted on March 28, 2015 at 1:10pm 14 Comments

So for a while I was thinking of creating a big ass tilt rotor tricopter with a X8 as a base frame. All good, but which ESC to use? After deciding that I don't really like anything on HobbyKing, I started working on my own. It had to have good quality components, rated for automotive applications (don't want my ESC to fail when flying...), FOC…

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