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Robot traction drive application

Submitted by cjmssmd on Tue, 2022-07-19 03:37

Vehicle is a skidsteer robot with Pixhawk autopilot.  Autopilot drives left & right motors via PPM (driving duty cycle mode on the fsescs).  Pack is 460Ah 15S LiFePO4 (i.e., 50v pack).  

ESC: fsesc6.7 

Motor: FreeRCHobby 6384 motor, 50Kv, 14 Poles w hall sensors.  Motor connected to a 20" diameter lawn mower wheel through 16:1 reduction gearbox (from https://banebots.com/)

Firmware version BETA 55

Flipsky 75100 and VEVOR MY1020D - Very jerky

Submitted by DevelopedBug on Sat, 2022-07-16 19:46

Hi,

I'm looking for any advice from anyone who may be familiar with using the VEVOR (or other) MY 1020 D inrunner motor with a Flipsky 75100 controller. I'm trying to use it in an electric dirt bike I'm building for my 8 year old daughter. But I can't get it to accelerate or run smoothly, it's very jerky and the motor is really bucking and kicking hard as it passes through certain rpm bands, and then near full throttle. Earlier on it threw the chain off. I've absolutely no idea what to change in the VESV Tool settings to make it run smoothly.

Real RPM=0 but ERPM>0 issue

Submitted by cir7 on Tue, 2022-07-12 20:17

I have a strange issue with a motor configuration on an ebike. During the test the motor is locked up with a break. Typical behavior of vesc would be to ramp up the duty cycle with increasing current linearly and maintain 0 erpm. Here that is true to some randomly changing point(usually 20-70A), but then the duty jumps to >0.2 and ERPM is at ~4K. It seems that the observer is unstable at higher current, the motor "overtakes" its target position.

VESC OpenLoop for didactic application

Submitted by dpeinado on Tue, 2022-07-12 12:32

Hello All,

I want to use VESC to drive some coils so it can illustrate some basic principles of electric motors. I use a coreless disk generator with nine coils in Y connection. I would like to excite this disk so I tried to use foc_openloop_duty from VESC devtools console. It seems to work, but it only last around 1 second. After that it stops generating the rotating magnetic field. Is there any way to set VESC generating this rotating magnetic field for longer times?? Thanks, best regards.

Diego.

Maker X - SV6 - FOC Detection Issues whatever the FW

okp's picture
Submitted by okp on Mon, 2022-07-11 12:18

Hi there,

It's been a while. I'm finishing my electric assisted Foil and running on 8S 12AH with a Maker X SV6 controller. 

I just can't get it work. it's becoming mystical. I've tried many things but unsuccessful.

either on 5.2 or 5.3 (removing the phase filtering)... the FOC detection fails. 

I've used the hw nolimits but also the standard one.

Did I miss something?

https://www.youtube.com/watch?v=02hXPcCKOco&feature=youtu.be

Thanks

VESC as voltage regulator in hybrid UAV

Submitted by Bunda on Sun, 2022-07-10 08:01

Hi,

My project consist of hybrid powerplant for UAV, it's ICE generator with 4.4kW spinning BLDC  and 12S Lipo batteries. Currently I stuck with voltage regulation from generator, my main goal is to vary RPM on gas engine depending from load, but then I am getting variable voltage to charge batteries and for system supply. It's around 15-50V range. 
 

As far I know, VESC has regenerative braking, so my Idea was to use it. As bonus, it also can start engine, when running as motor. 

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