I'm hoping this might interest some on here...
I'm wondering what the preferred method for controlling the speed of, in this case, a central heating pump.
My initial thoughts were to use a triac, as you would find in a dimmer switch.
However, I found this
on YouTube, where the guy modulates the duty cycle of the a.c. at about 7-8 Hz using a solid state relay, which was interesting.
I've seen a discontinued variable speed Grundfos pump for the American market, which uses some sort of simple triac circuitry, where the speed is controlled by an external signal.
Any thoughts on pros and cons?
I'm wondering what the preferred method for controlling the speed of, in this case, a central heating pump.
My initial thoughts were to use a triac, as you would find in a dimmer switch.
However, I found this
I've seen a discontinued variable speed Grundfos pump for the American market, which uses some sort of simple triac circuitry, where the speed is controlled by an external signal.
Any thoughts on pros and cons?