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FOC: 'alignment electrical angle' and low speed

David Martins
Senior
Posted on March 09, 2017 at 11:11

Hello.

I'm using the FOC SDK (v4.3) with a incremental encoder.

I need to know what, in practice, means the angle placed on 'alignment electrical angle'.

https://spostimg.org/y32f6ts1h/Capturar.png

I'm having some problems because I'm using a BLDC motorand at low speed the motorhas a lot of cogging.

Do you have any suggestions to solve this?

Throughout the range of 500->4000RPM everything works well! Below 500RPM it is difficult to maintain control. I'm using an encoder with 500ppr on a motor with 2 pairs of poles.

Do you have any idea?

Thank you.

encoder bldc foc-sdk angle

3 REPLIES 3
David Martins
Senior
Posted on March 15, 2017 at 19:27

Someone can help me?

Why can not I get a perfect spin below 500RPM?

I am using an incremental encoder of 500ppr. The control has good feedback ...
Laurent Ca...
Lead II

The question has been moved from the "Motor Control Hardware" section to the "STM32 Motor Control" section (the question is about the STM32 MC SDK). 

Best regards

Laurent Ca...
Lead II

The question has been moved from the "Motor Control Hardware" section to the "STM32 Motor Control" section (the question is about the STM32 MC SDK). 

Best regards