EEVblog Electronics Community Forum
Electronics => Beginners => Topic started by: Vindhyachal.takniki on February 19, 2015, 10:16:21 am
-
1. I have to control the rpm of motor. There is feedback in pulses by which I can see what is the rpm of motor.
2. I am planning to do it by phase control.
a. Read PWM signal of motor for 1 sec.
b. Calculate the speed
c. control the phase.
d. go to step a.
3. I am not able to control phase precisely. RPM of phase shows variation of +-40 rpm then what I set.
4. What I have noticed is even if I give constant voltage 220vac directly, even then the rpm/pwm keeps of changing.
5. Any other precise method to control rpm of motor. Motor runs on 220Vac. Its shaded pole motor