Sunday, 3 March 2019

AC motor Low RPM problem


I'm working on a controller for ac induction motor and it's spec is given below. I could control the speed without any trouble at higher speeds like 2000 rpm and above. I'm using TRIAC phase angle control topology in the controller. But at lower RPM like below 1000 RPM but motor takes so much time to reach the set rpm which is not desired as it will add error to the set time period (a timer is there to run the motor @ set RPM for a set period). Also is there any problem if I don't increase the speed gradually.


Motor Spec


1/8hp ,230v/50Hz ,6000 RPM @ No load, I'm using a load of around 1KG




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