Triac driven motor problems.
Triac driven motor problems.
(OP)
Hello,
Here is the Triac circuit that my company are using to turn a mains fed motor on and off.
(it's a water pump motor)
Schematic of Triac motor drive circuit:
http://i56.tinypic.com/11gr821.jpg
I am sure they won't mind me posting it because it is a standard Triac drive circuit.
-As you can see, it has a "H/L" switch for making the motor run with UK or USA mains.
(please ignore the "V_MOT" designator, ....as far as this is concerned "V_MOT" is just 36V.)
The non-symetrical switching of triacs is well known, and I believe that this may be why some of our pumps make too much audible noise.
-Also, the Triac gate driver circuitry here is very lossy.
So,
Do you know of a better way of switching a mains motor on and off?
Here is the Triac circuit that my company are using to turn a mains fed motor on and off.
(it's a water pump motor)
Schematic of Triac motor drive circuit:
http://i56.tinypic.com/11gr821.jpg
I am sure they won't mind me posting it because it is a standard Triac drive circuit.
-As you can see, it has a "H/L" switch for making the motor run with UK or USA mains.
(please ignore the "V_MOT" designator, ....as far as this is concerned "V_MOT" is just 36V.)
The non-symetrical switching of triacs is well known, and I believe that this may be why some of our pumps make too much audible noise.
-Also, the Triac gate driver circuitry here is very lossy.
So,
Do you know of a better way of switching a mains motor on and off?




