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by vadim
18 Sep 2018, 13:09
Forum: General
Topic: Braking in speed PID mode
Replies: 3
Views: 7500

Re: Braking in speed PID mode

Some progress :) I've traced lack of braking to this condition in mcpwm_foc.c : VESC braking code.PNG apparently, the threshold is very high and is continuously triggered in my setup. After disabling this check, constant current braking works, and I see negative battery current (charging). However, ...
by vadim
16 Sep 2018, 09:12
Forum: General
Topic: Braking in speed PID mode
Replies: 3
Views: 7500

Re: Braking in speed PID mode

Running FOC mode (HW4.10, FW 3.40) Now I see that the motor current polarity depends on the direction of rotation, and yes, battery current is zero. This holds for 1500 eRPM, and all the way to 4000 as far as I tried. Is there a condition to brake by shorting for some RPM values ? Can't find it in t...
by vadim
13 Sep 2018, 13:01
Forum: General
Topic: Braking in speed PID mode
Replies: 3
Views: 7500

Braking in speed PID mode

Hi all, I'm trying to configure braking for use in speed controlled mode. The goal is have the motor brake when the speed is above a pre-set value, which seems to be working if motor is applying torque when speed is below the set value. Now I need to limit the torque, and ideally have the motor coas...
by vadim
06 Sep 2018, 19:12
Forum: General
Topic: Speed control tuning for 500-1000 RPM
Replies: 1
Views: 6448

Re: Speed control tuning for 500-1000 RPM

To answer my own question, what eventually solved the problem for me was fixing the alignment of encoder magnet.
by vadim
02 Sep 2018, 20:34
Forum: General
Topic: AMS AS5047 availability ?
Replies: 0
Views: 18726

AMS AS5047 availability ?

Hi all, Since AS5047 encoder is quite popular with VESC users, I thought about asking it here: anyone know what is going on with availability of those ICs ? They seem to be out of stock with all major distributors. Any knows VESC-compatible magnetic encoder chip that is actually available for purcha...
by vadim
02 Sep 2018, 20:06
Forum: General
Topic: Speed control tuning for 500-1000 RPM
Replies: 1
Views: 6448

Speed control tuning for 500-1000 RPM

Hardware 4.12, firmware 3.40, FOC, ABI encoder, 350kV motor Hi forum ! I'm looking for guidelines / advise on tuning speed controller for smooth operation in relatively low speed range (500-1000RPM) with varying load. With default wizard-generated parameters I'm seeing uneven speed and practically n...
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[phpBB Debug] PHP Warning: in file [ROOT]/vendor/twig/twig/lib/Twig/Extension/Core.php on line 1236: count(): Parameter must be an array or an object that implements Countable

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