2005-10-28 12:24 AM
2011-05-17 01:19 AM
Hello,
I need to set my ST72141 software controller for 8 poles (4 pair) BLDC motor for a very low speed (150,250,500 rpm), and I have no problem with voltage open loop, but actually is not possible for me get speeds lower than 800/1000rpm in voltage closed loop. Have you some suggestion about? thank Claudio2011-05-17 01:19 AM
Hello,
In closed loop the PI loop make a test with a minimum duty cycle. It could be that the minimum value set in your program do not allow to run the motor at lower speed than 800/1000rpm. You have to change this value to be compatible with your request.