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Topic-icon Segway?

  • MrBear
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6 years 4 months ago #29528296 by MrBear
Segway? was created by MrBear
Hi
I have 2 BLDC (hub)mmotorcontrollers from you, and was thinking about implementing them in a Segway-like-thing. Does anybody know anything about that? Do you know if its possible? I was thinking to connect it with an Arduino (Microcontroller). This way the Arduino could gather the information from the gyroscope/accelerometer and transmit a 0-5V to The Controller. I was thinking about how far you were able to go by only getting the signeal form the gyro, but letting the roboteq software handle all the calculations on regulating. Or maybe just use the roboteq controller as the amplifier.
I am working on a prototype with Brushed DC but to get more power and to move the motors out of the construction i wanted to try hub and BLDC. I am worried about torque-ripple at low speeds.... is that something i should be?

Hope to hear some interesting stuff from you.

Best regards Bjørn

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  • roboteq
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6 years 4 months ago #29528301 by roboteq
Replied by roboteq on topic Segway?
Here is an example of the first reported segway clone a few years back tlb.org/#scooter . It was done using our AX2550 controller.

It should be now possible to do the same and much better with our HBL2350, dual channel brushless controller.

It may even be possible to use the controller\'s own programming language and doing without the external arduino. But we can\'t help you with the algorithm or program.

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6 years 1 month ago #29528522 by MrBear
Replied by MrBear on topic Segway?
Thank you for the reply. I have been off the topic for some time due to other school projects but now i am back.

How does your controller (MBL1650) correspond to direction change while driving motors in one direction?
Will it be able to do so rapidly?

Thank you.

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  • Griffin Baker
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6 years 1 month ago #29528523 by Griffin Baker
Replied by Griffin Baker on topic Segway?
In open loop, you can change your speed and acceleration parameter to get the fastest change over in time. If you set max speed rpm to 100, and your accel and decel to the max (50000), then the response time is the fastest.

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6 years 1 month ago #29528524 by MrBear
Replied by MrBear on topic Segway?
Hello

I have been told that reversing direction was done slower on BLDC then on brushed DC, making it more difficult to implement on a Segway. I have tried to do some searching on Google but am having trouble finding any proper information on how and why it should be slower!

Any help would be appreciated.


Bjørn

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  • Griffin Baker
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6 years 1 month ago #29528525 by Griffin Baker
Replied by Griffin Baker on topic Segway?
May I ask where you heard this from? Cite a source maybe.

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6 years 1 month ago #29528526 by MrBear
Replied by MrBear on topic Segway?
Well i have made a prototype of the segway using brushed motors, because i had them lying around. After i was convinced i could make a "Segway" i wanted more power and a better design. I turned tu my teacher at my University and told him about my plans of getting BLDC-hubmotors as the next step. He advised me to stick with the brushed because of the reasons mentioned above.
Thats my source.
What he said was that BLDC controllers use regenerative breaking to slow down rather than applying a torque in the opposite direction.

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  • roboteq
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6 years 1 month ago #29528527 by roboteq
Replied by roboteq on topic Segway?
A BLDC motor with sensors will behave practically the same as a brushed DC motor. The original segway is using brushless motors.

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