Motor detection not possible/Phase 1 BEMF Voltage off

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Svenska
Posts: 15
Joined: 02 May 2016, 12:41

Motor detection not possible/Phase 1 BEMF Voltage off

Postby Svenska » 02 May 2016, 12:47

Hello,

I got a VESC here which I made myself.
I can't get it to detect any motor and during the troubleshooting I found that one phase is siting much higher then the others.
The motor detection keeps on coming back with failed detection and is not able to spin up the motor no matter what the settings are. This is in BLDC as well as FOC.

I attach a picture of the BEMF plot.

I would be gratfull about any help, as I am at the end of my wisdom.

Thank you, Svenska
Attachments
Strange_Phase.JPG
Strange_Phase.JPG (169.11 KiB) Viewed 1635 times

ViennaTom
Posts: 41
Joined: 21 Apr 2016, 13:06
Location: Austria/Vienna

Re: Motor detection not possible/Phase 1 BEMF Voltage off

Postby ViennaTom » 12 May 2016, 09:24

Hello Svenka,

I'm not a real expert by myself but your BEMF signals look somehow weird to me and signals on Ph 2 and 3 reading identically could be a soldering bridge on the analog inputs ?

Hope it helps a little !
Tom
Attachments
bemf_duty_004.jpg
bemf_duty_004.jpg (244.96 KiB) Viewed 1585 times
Last edited by ViennaTom on 23 May 2016, 08:12, edited 2 times in total.

Svenska
Posts: 15
Joined: 02 May 2016, 12:41

Re: Motor detection not possible/Phase 1 BEMF Voltage off

Postby Svenska » 19 May 2016, 15:22

Thanks for the reply, I figured it out since then.

The voltage dividers to sense the BEMF voltage didn't make proper connection. They are to be found at R23/24/26/2732/33

Might help somebody in the future?


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