Hi,

could someone guide me through the steps of how I would go about designing a bldc motor, knowing only the following requirements;

a) Power 300W
b) voltage 24V
c) Torque 40 Nm
d) RPM 180
e) Max external dia = 254mm
f) Max length = 90 mm

So now I need to know;
1) How many poles do I need? and why?
2) How many teeth? and why?
3) How many windings? and why?
4) Of what diameter wire? and why?
5) What dimension magnets? and why?

Would much appreciate if you can get me started.
I'm sure I can take it from there
Thanks

Sunil

 

If you really want to start from scratch, you'll need to make a Big Bang.

Here is an early hit from my search engine:

http://www.eece.maine.edu/motor/BPMM_Ch8.pdf

There is also a Yahoo group on DIY brushless motors. Unfortunately, it is relatively inactive now, but its threads may be helpful.

http://groups.yahoo.com/group/lrk-torquemax/?yguid=281342726

John