Hello everyone,

I am trying to estimate the air gap flux density in a surface mounted BLDC motor. To do so, I am refering to the book Brushless Permanant Magnet Motor Design second edition.

The equation I am implementing in MATLAB is in page 153 and more details are given in annex B page 349.

I wrote each equation properly in MATLAB but I am not getting the result expected (page 357).

It's been 2 days already and I don't know where my mistake is.

If anyone has some idea, thank you.

I added the matalb code to this post for you to check and some picture of what I should get.

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