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Ask the reference codes with the document DRM139 about sensorless FOC

Question asked by changshui li on Dec 11, 2017

Hi, I am doing a project on FOC motor control with MC56F84766VLK. Last time we finished the work with quad encoder to serve as the angle/speed signals for FOC.

Now we want to cancel the quad encoder in order to cost down. I find one document(DRM139) described a method with sensorless BEMF-Observer( as the below figure). It fit my demand.


I can't find the relative software about DRM139 method.

Who can get the reference software codes as described on DRM139?

Thanks very much.

Changshui Li