RE: Re: AC brushless motors

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.

Regards
Stephan