BLDC controller, Were to find?

[Jonaz]

Hi.

Were can i find some shematics to a bldc sensorless motor?
It would be nice if it a simple desing. The motor is an old car generator an running with 12V

What dose VFD means?
Thanks
Jonaz

 

[motorsdirect]

Sorry, no idea for the bldc motor...But a VFD is a Variable frequency drive!!
Jeff

http://www.motors-direct.co.uk

 

[Jonaz]

Oh thanks.
Of course did i mean a schematic to a bldc controller.

 

[jraef]

Here is a decent paper on the basics. You will need to register but it is free and they don't spam you.

http://www.techonline.com/community/tech_group/analog/tech_paper/33710?li=1

"Venditori de oleum-vipera non vigere excordis populi"

 

[Jonaz]

Iwas thinking one without a µU.

I have find the ML4426.
Datasheet>>

http://www.fairchildsemi.com/an/AN/AN-42004.pdf

But i cant find a place to purchase it.

How do u control a 3 phase bldc?

 

[Jonaz]

And its sensorless

 

[blacksea]

I hope that description of brushless DC motor controller with Back-EMF sensing (i.e. sensorless)is exactly that you looking for. See for example 8902-A Data Sheet.

 

[baltic]

Jonaz,

if you want I can send you a couple of documents that explain how BLDC motor is commutated and how sensorless BLDC controller works.

-Baltic
dr_brushless@hotmail.com