You are here

Block waves with FOC

5 posts / 0 new
Last post
spacemango
Offline
Last seen: 4 years 5 months ago
Joined: 2020-05-14 09:47
Posts: 11
Block waves with FOC

Hello! I looked at the phases in an oscilloscope when running the motor with FOC. I see block waves and not sine waves. Does anyone know what could be the cause? 

TheFallen
Offline
Last seen: 4 weeks 1 day ago
VESC FreeVESC Original
Joined: 2017-09-11 11:46
Posts: 222

Post a screen capture and maybe you'll get a response.

mihota
Offline
Last seen: 3 years 4 months ago
Joined: 2020-09-12 18:38
Posts: 2

I am having the same problem. It looks like a PWM with varying duty cycle instead of a sine wave

TechAUmNu
Offline
Last seen: 3 months 1 week ago
Joined: 2017-09-22 01:27
Posts: 575

Just because its in FOC mode, doesn't change the fact that its still outputting a PWM signal, unless you have some big filtering on the output to smooth the pwm out you will see it as that.

Lisa1812
Offline
Last seen: 4 years 3 months ago
Joined: 2020-09-18 11:51
Posts: 1

The sine wave is also the most important special case of the periodic wave. ... In this sense, sine waves are the pure, basic building blocks of all waves. find a word