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anybody interested in ninebot-segway's sensorless position observer?

Submitted by lanmanck on Mon, 2020-06-01 04:33

This paper is from Ninebot-segway , which made self-balancing vehicle. their driver is very good to control hall bldc/pmsm.

I want to change to position estimation to this algorithm, anybody interested can discuss here.

 

http://www.labisart.com/public/uploads/ninebot-segway-paper.pdf

Measurement of voltage and mah

Submitted by renaudbarbier on Sun, 2020-05-31 17:04

Hello.

Did some tests today with 75/300 and my 5.5kw brushless motor powered by a 46ah battery.

After a long running time I was surprised to see 1v difference between battery BMS measurement and vesc one (48v in vesc vs 47v in BMS).

Also the mAh consumed 9400 mAh in vesc vs 25000 mAh in BMS!

 

Anybody can explain why such difference?

Do I need a motor with Hall sensor to use Vesc tool?

Submitted by greew on Sun, 2020-05-31 06:48

Hi I'm kinda new to this and I bought my vesc a while back.

I updated my vesc and can't get through the setup because it doesn't detect any sensors. My motor do not have sensors and I was able to run without sensor beforehand.

Are sensors now required to use the vesc tool?

 

Locking for reconfiguration/reprogramming

Submitted by TZTZ on Tue, 2020-05-26 19:14

Hi,

I was wondering if someone knows how to lock the vesc from reconfiguration/reprogramming through bluetooth or only allow certain devices to connect. So that when I leave my bike at a store while shopping not some funny guy will reprogram/reconfigure my bike.

Does someone also know something more about the bluetooth ignition key where a bluetooth connection prevents from current running.

Sorry if I posted it in the wrong section.

Problem with breaking in use in RC plane

Submitted by fluffy on Tue, 2020-05-26 06:11

I'm use and ESC with VESC in an RC plane. It someone works but if I am going at high power then slam the throttle to zero, the momentum of the propeller spins the prop nut off and the propellor comes flying off. If I slowly back the throttle to zero, everything is fine.  I suspect what is happening here is that when I slam the throttle to zero,  regenerative breaking i causing enough torque in the opposite direction the prop is spinning that if unscrews the prop nut. 

Controlling BLDC Cordless Router with VESC

Submitted by CthulhuLabs on Mon, 2020-05-25 16:58

I have a BLDC cordless router from Makita (model XTR01) that I am using in my Shapeoko CNC. I am currently running it off a 24V 350W Meanwell power supply that I have adjusted the voltage down to 21V (the max a Makita Battery puts out) and have wired into the battery contacts. I want to be able to control the router RPM from my CNC control board and not the stupid dial on the router. Sadly the ESC that is built into the thing is potted with a crapton of epoxy resin so I cannot reverse engineer it. Instead I got a purchased this guy:

A real Noob Question

Submitted by donrecardo on Sat, 2020-05-23 16:56

Hi

I don't want to make a long board or scooter or such , I am actually hoping to use the  controller to run the motor on a gem stone faceting machine that I am building

I want to be able to set the speed  and maybe have it running at that speed for perhaps an hour at a time

My question is , can I use the PWM output from an arduino to set the speed on the controller or if not would a

servo tester output work ?. I cant see how that would be any different to an RC receiver output

Voltage on motor leads @ 0 throttle

SimpleUnmanned's picture
Submitted by SimpleUnmanned on Thu, 2020-05-21 02:40

Hello!

I am using some VESC based controllers (from flipsky) on a prototype boat, which is equipped with submersible brushless motors.

I was rather shocked (pun intended) by power in the water from the motors when at zero throttle. I later measurd 12v on each motor lead again the battery's ground (Battery is around 29v) when there is no throttle.

Is this normal operation of brushless ESCs, VESC or is something odd happening? Or could this be a function of the break? I may have it enabled.

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