I'm trying to find out the best path for getting a high-speed PWM AC driver.
I've seen 2 designs, one with 2 MOSFET's:
and one with only 1 MOSFET:
The idea is to use only a few parts and keep it very simple.
The circuit will act as a PWM driver for AC vibration solenoids, which demands high-speed switching, so SSR or any other part that has zero-crossing on/off is out of the question as we need to kick out about 2kHz, or maybe even more, for adjusting pumping pressure/speed.
These pumps are 230AC powered, and current consumption is between 27 and 52W.
I have checked this Fairchild MOSFET FCP190N60E, for high power switching as it is cheap enough. But I don't know if it is suitable.
Someone also told me about the possibility to use this type of random phase phototriac:
The end result should be something like this: ( actually it should be much better :) )
Can someone let me know if these are the best parts for the job? Can it be wired with one optocoupler to keep it safe?
As a guideline, this is how these type of pumps work: