Re: [CAD_CAM_EDM_DRO] RE: Re: AC brushless motors

Stephan Kotze wrote:

> Dear Mat
>
>I am not an Electronics engineer, but a Mechanical engineer that has
>specialised in motion and automation. My experience lies in embedded
>systems, control etc. I am no stranger to electronics having designed and
>built plenty of motion controllers, factory automation machines etc. The
>problems from my side is that there is a very long supply chain to South
>Africa, with each distributor adding a mark-up. At the end a simple 1.2 Nm
>AC brushless motor is in the order of 1000 USD and we are not even
>considering a controller yet
>
>As for the controllers, I strongly believe in not reinventing the wheel, and
>came across this circuit.
>http://www.irf.com/product-info/imotion/acservo.html
>This is an integrated controller and power module, much like the L297/298
>chipset for Steppers, only this can do AC servos. All you need is a few
>additional glue chips, rectify the incoming AC, and off you go. I can put
>this entire unit together for a very reasonable price.
>
>

Well, I looked this up in the Digi-Key catalog, and the "design board"
or reference
kit is US $999! Yikes! I don't know whether you are getting some
serious software
to go with this, or just the board and chips. I couldn't find a proce
for the IRMC201
chip alone.

Jon