Traic Dimmer ckt problem

Thread Starter

ahmed_2016

Joined Sep 8, 2017
2
Hi Everyone !


i have motor of 1000-4500 RPM. There is a triac dimmer ckt in the machine to control the speed of motor.

From Last week or so machine is malfunctioning and not attaining the full speed.

I m Getting 80 - 150 volt variation (AC Supply 220v) at the output terminal of Traic (terminals of motor).

What do u think is the problem? (Tried Replacing Traic, pot is also working properly)
 

MisterBill2

Joined Jan 23, 2018
18,170
What is the nature of the 4500rpm motor.?
Max.
A motor that has that speed range with a simple triac control is probably a brush type universal motor. My first guess is that there is a brush problem and probably the resulting noise is affecting the controller. So the first step is to inspect the brushes, and the second step would be to try the motor direct and see if it reaches the max speed.
 
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