AVR-Chat

np np wrote:
>
> If its mains motor is is probably better controlled by a PID algorithm 
> and using the mains cycles to phase control the power.
>
   Not necessarily.  PID yes, V/F control works quite well for AC 
induction motors, and is inexpensive and easy top do.  Space Vector PWQM 
is even better, is you're using three phase induction motors.   One snag 
with V/F control is that it will only achive approximately 83-86% of the 
maximum rated speed for the motorm due to the fundamental mathematics 
invovled (and no, *I* don't understand the reasons thoroughly, the mathj 
is extensive)


avrFreak