perform commutation twice consecutively in the CommutationSetStarting function

[TQF]

Why does the source code for the BLDC motor with BEMF Zero Crossing using ADC application switch from the alignment state to the start state and perform two commutations consecutively?

Reference code link：

https://community.nxp.com/t5/NXP-Designs-Knowledge-Base/RDDSP56F8BLDCAZC-3-Phase-BLDC-w-Sensorless-B...

TQF_0-1747714929939.png

[Celeste_Liu · Accepted solution]

Hello @TQF ,

Thanks for your post.

Please refer to the DRM026.pdf attached to the website you mentioned. (RDDSP56F8BLDCAZC: 3-Phase BLDC w/Sensorless Back-EMF ADC Zero Crossing Sensor for 56F80X or 56F8300 ...

Celeste_Liu_2-1747901645619.png

In Section 3.3.4.5 "Starting (Back-EMF Acquisition)", an explanation is provided:

Celeste_Liu_0-1747901534265.png

Celeste_Liu_3-1747901953085.png Hope it can help you.

BRs,

Celeste

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