Hello Everyone, I am currently working on my ideas for a dual-motor, o-drive based, "onewheel" with doubled up hoverboard wheels.
I just wanted to start off stating that I have tried many things before getting to the point that I am at. I have:
with that being said, I have recently ordered a ODESC 3.6 from sequre, given the mid autumn festival sale going on i got it for under 80 dollars and that was a steal for me. I was thinking given how it's a smart FOC controller, that it should be able to control two different motors that have been connected together face to face. I understand I will need a CAN - based inertial measurement (gyro) input to control balance, and I understand this won't be an easy task as usual.
I have experience successfully bolting a pair of hub motors together and getting them to run together without many issues, by using a pair of 350w chinesium ebike controllers together (individually hall sensor based control) and it worked well however it was not perfect and the motors were not perfectly concentric to the wheel I mounted them to, so the frame I had built was flexing while the motor shafts slightly wobbled. While there were issues, it still performed very well and got scarily fast (probably 28+mph with an 16in wheelbarrow wheel as the tire and hub.)
So my main question is, does anyone with experience with the dual motor odrive have any suggestions, concerns, or any other comments that could help me along my way?
I currently have two ideas on how I will go about this project.
1) a more feasible approach, wherein I use two delta-modded hoverboard motors facing away from each other, with shortened shafts to more closely mount the motors with each other. This one jumps out to me since it sounds less involved to make the motor assembly function as it needs to, and how the motors will not be bogged down by each other. Think swagtron zipboard but made for adults. My frames I make are normally welded and bolted together from aluminum c channel and plate, since I worked at an aluminum extrusion manufacturer and have an abundance of aluminum scrap at my disposal from my time there.
With delta modded wheels, I believe it would get much better speed out of the hoverboard wheels due to the nearly doubled rpm under load.
2) A more involved approach, similar to the hoverboard based onewheels made online, but with different electronics. I would bolt the two hub motors face to face, add a racing gokart tire that would fit the hubs properly, and make a proper "onewheel" design for the unit. I currently own a homemade electric skateboard, made from the same delta modded hub motors, with a hall-less controller from LingYi. it works flawlessly and I believe the same idea could be applied here.
Any input would be appreciated, please keep it constructive if you want to critique me, im open to listening.
I just wanted to start off stating that I have tried many things before getting to the point that I am at. I have:
- attempted a design using a stock hoverboard motor controller (could not get balancing correct) and it sped off on it's own into a wall at top speed, and destroyed itself doing so. (a friend of mine also tried this, and his also kept going away on its own.)
- attempted a design of hacking the firmware of a separate hoverboard controller, to fix the PID balancing issue. however, something went awry and it let the magic smoke out during testing. I would attempt another with one, however i've run out of usable hoverboards in a 30 mile radius to buy and all of mine have died or been scrapped.
- Attempted a separate design using an arduino, two brushless controllers, an mput6050, and a custom high speed switching mosfet board. this one was close, but a friend who was better at programming than I am accidentally killed the controllers while performing a PID tuning test.
- I also think i should mention, that I've only spent maybe 100 in total between all the attempts to make these, since i've been lucky enough to get a majority of my components from my work, friends I've made in college, or from scrapping other electronics/hoverboards.
with that being said, I have recently ordered a ODESC 3.6 from sequre, given the mid autumn festival sale going on i got it for under 80 dollars and that was a steal for me. I was thinking given how it's a smart FOC controller, that it should be able to control two different motors that have been connected together face to face. I understand I will need a CAN - based inertial measurement (gyro) input to control balance, and I understand this won't be an easy task as usual.
I have experience successfully bolting a pair of hub motors together and getting them to run together without many issues, by using a pair of 350w chinesium ebike controllers together (individually hall sensor based control) and it worked well however it was not perfect and the motors were not perfectly concentric to the wheel I mounted them to, so the frame I had built was flexing while the motor shafts slightly wobbled. While there were issues, it still performed very well and got scarily fast (probably 28+mph with an 16in wheelbarrow wheel as the tire and hub.)
So my main question is, does anyone with experience with the dual motor odrive have any suggestions, concerns, or any other comments that could help me along my way?
I currently have two ideas on how I will go about this project.
1) a more feasible approach, wherein I use two delta-modded hoverboard motors facing away from each other, with shortened shafts to more closely mount the motors with each other. This one jumps out to me since it sounds less involved to make the motor assembly function as it needs to, and how the motors will not be bogged down by each other. Think swagtron zipboard but made for adults. My frames I make are normally welded and bolted together from aluminum c channel and plate, since I worked at an aluminum extrusion manufacturer and have an abundance of aluminum scrap at my disposal from my time there.
With delta modded wheels, I believe it would get much better speed out of the hoverboard wheels due to the nearly doubled rpm under load.
2) A more involved approach, similar to the hoverboard based onewheels made online, but with different electronics. I would bolt the two hub motors face to face, add a racing gokart tire that would fit the hubs properly, and make a proper "onewheel" design for the unit. I currently own a homemade electric skateboard, made from the same delta modded hub motors, with a hall-less controller from LingYi. it works flawlessly and I believe the same idea could be applied here.
Any input would be appreciated, please keep it constructive if you want to critique me, im open to listening.