Search found 86 matches

by ThierryGTLTS
19 Oct 2017, 11:22
Forum: Custom Applications
Topic: Robot aplication. Speed of motors in both directions.
Replies: 3
Views: 2266

Re: Robot aplication. Speed of motors in both directions.

Sorry for late answer, no torque like you :!: :!:

Have a Look at this very impressive video:

I hope we can implement such high precision positionnining in the future with VESC.

Have a Nice Day.

Thierry
by ThierryGTLTS
18 Oct 2017, 11:11
Forum: General
Topic: Brushless motor stop at 58% of duty cylce
Replies: 4
Views: 2181

Re: Brushless motor stop at 58% of duty cylce

Check first the maximum speed, but attention, electrical speed = ERPM :!:

Erpm = (Mech.rpm) x (number of pole pair (magnets) of the motor).

You've a lot of magnets in that motor.

Have a Nice Day.

Thierry
by ThierryGTLTS
08 Oct 2017, 06:57
Forum: VESC Projects
Topic: High RPM rc motor for Ebike
Replies: 5
Views: 3630

Re: High RPM rc motor for Ebike

Hi, That will make a lot of noise, because of several things: chain reducer, high speed motor, and carbon frame resonance. Compared to this, the Bafang is very silent :!: :!: But if noise is not an issue for you, it's possible. You can have a look at several project on Endless Sphere. Have a Nice Da...
by ThierryGTLTS
07 Oct 2017, 16:51
Forum: General
Topic: Emergency braking concept for VESC
Replies: 40
Views: 20262

Re: Emergency braking concept for VESC

Hi Ecyclist, I've seen on "endless Sphere" the fantastic job you've done with the cycloïdal drive. My Project will couple a TMotor U8 to a 12:1 Neugart reducer and then a 3:1 sprockets and chain reducer with a freewheel. But I have a question if you wanna use a PAS, how will you interface ...
by ThierryGTLTS
06 Oct 2017, 08:24
Forum: FOC
Topic: FOC poor efficiency at high speed
Replies: 20
Views: 9867

Re: FOC poor efficiency at high speed

I don't think it's possible, but I'm not sure. BLDC and FOC can switch from sensored to sensorless and that's what I do, because sensorless mode works better :) Sensors are only there to have a clean start of the motor in my case. Please can you do a very simple test :?: :!: Just have a look at the ...
by ThierryGTLTS
05 Oct 2017, 07:03
Forum: General
Topic: Emergency braking concept for VESC
Replies: 40
Views: 20262

Re: Emergency braking concept for VESC

Just have a Look there

http://vesc-project.com/node/186

It's a new (yesterday) step-by-step set-up :!: :!: :!:

Have a Nice Day.

Thierry
by ThierryGTLTS
04 Oct 2017, 08:59
Forum: FOC
Topic: FOC poor efficiency at high speed
Replies: 20
Views: 9867

Re: FOC poor efficiency at high speed

OK, the firmware works well now. I've rebuild a 3.29 firmware for VESC Tool 0.82 and the measured current is right with 3 mohms shunts. But I've still have a strange behavior in FOC when the motor runs very slowly, less than 1000erpm, and sometimes between 2300 and 2800 erpm. Is it possible that it ...
by ThierryGTLTS
03 Oct 2017, 15:44
Forum: FOC
Topic: FOC poor efficiency at high speed
Replies: 20
Views: 9867

Re: FOC poor efficiency at high speed

Loading modified 2.18 firmware version with VESC Tool and then using BLDC Tool is working.

But it's not better, I have more noise and can't run the motor at a very low speed.

So I will wait for a more stable version of VESC Tool and try again.
by ThierryGTLTS
03 Oct 2017, 15:26
Forum: FOC
Topic: FOC poor efficiency at high speed
Replies: 20
Views: 9867

Re: FOC poor efficiency at high speed

@ ThierryGTLTS - What does "not work" look like? Please let me know what you find out about why the 3mOhm firmware does not work. I am following close behind. Thanks! When i wanna upload the 3.29 modified firmware, VESC Tool upload the HW6 firmware version, not the HW 4.10 version, I don'...
by ThierryGTLTS
30 Sep 2017, 16:59
Forum: FOC
Topic: FOC poor efficiency at high speed
Replies: 20
Views: 9867

Re: FOC poor efficiency at high speed

Yes I've soldered the shunts.

But I've problem because the modified firmware for 3 mohms doesn't work.

I have to inquire why :!: :!:

Have a Nice Day.

Thierry

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