Torque calculation of a BLDC motor

1

Hi

During my research for my racesim (https://www.youtube.com/watch?v=SJ3WGCC4Fes) I calculated the torque constant because I needed it for the book I had to write about it. It was interesting to see that it’s actually not just 8.27*I/Kv, This is only true when using sine waves. Also, I started working it out more mathematically correct and I could not finish it. Maybe someone else can or maybe someone is interested in where it comes from, so that’s why I’m sharing it.

Simple version:

image
image869×688 19.9 KB

image
image868×568 15.5 KB

Not finished more correct version:

image
image942×768 19.5 KB

image
image938×556 20.7 KB

image
image950×770 23.1 KB

image
image952×273 3.68 KB

image
image585×576 10.5 KB

image
image665×803 31.7 KB

Carelsbergh Stijn

2 Likes
2

Did you create any program for solving it by putting the variables.?

3

No, but you can just plug it into the last line.

T = 15√(3)/π * I/Kv

Cheers

Carelsbergh Stijn

4

Did you prepare any document regarding this calculation and if you could give any reference book or article.

5

Hello

These documents were written by me. I posted everything I got.

Cheers

Carelsbergh Stijn

1 Like