Sorry for delay - for some reasons i'm not getting updates to all thread that happens on this community and some of the replies might be overlooked.
As shown in Fig. 4, the motor is supplied with a variable voltage pattern that cause it to speed up and down to certain levels and than back to stall.---------------it seems "than is wrong for "then
The figure shows the Electric Angle, Current and Back-EMF when the motor is accelerated up to 1000rpm in 1sec, then is keeping that speed for another 1sec followed by a 1sec deceleration ramp to 500 rpm, maintaining 500rpm for another second and then decelerated to 0 or stall.
in Eq. 5 at Module 9: Position Observer (Part 1/2)，i think ω*φd is missing in φα,either for φβ。am i wrong?
Eq. 5 is written in DQ reference frame hence there should be no αβ components.
In general, i've used this document as reference: https://www.nxp.com/webapp/sps/download/preDownload.jsp?render=true and other equation that can be found on the web.
Hope this helps!
Thank you very much for the interesting posting, it is very inspiring!
The link you shared in the reply to wu chao does not seem to work - it just directs to the Software Center and no download starts.
Could you please reshare?
Thanks a lot,