Hi Rick,
thanks for your comments and suggestions.
I have some caps underway that I can experiment with as you suggest.
To be clear, my goal right now is to achieve a fixed reduction in speed without switches for different speed settings.
I’m a little bit unclear about the best way to wire additional capacitance into the circuit above though.
There are 3 configurations that I have in mind and I’m unsure what, if any, difference there is between them from the perspective of reducing the speed of the fan:
-
A capacitor in series with the entire motor, either on L or N. This puts the extra capacitance on both coils.
-
An extra capacitor only on the secondary winding. This would change the existing capacitance that is already there. If this is an effective configuration, then I could also simply exchange the existing motorcapacitor by one with a different value and not increase the overall number of capacitors in the circuit.
-
An extra capacitor on the primary winding only. I have a feeling that this would be the least favorable, but I can’t really explain why.
From what I read on the internet, most suggestions are to put an extra cap in series with the entire motor, but I’m also curious what the drawback would be of only changing the run capacitor to a different value.
Best regards,
Rick