I want to provide constant 24 volts AC to an inductive load using a transformer - regardless of "brown-out" (low voltage) conditions at the primary and I am not sure it is possible. During the summer months where I live it is common to have low supply voltage issues, the 208v supply dropping to 200. I though if there was a way to regulate the 48 v output voltage of two 24v transformers, secondary's wired in series; then if the primary voltage drops there would still be plenty of voltage on the secondary. Of course this device would have to be a variable self adjusting resistance, adjusting to its own down-stream voltage... a simple resistor obviously would not work.
Is this even possible without redesigning a U.P.S. wheel? Has anyone ever heard of such a device? This is electro-mechanical equipment using standard 24 volt AC controls and contactors to operate compressor motors. The motors can operate with the reduced voltage, but the contactors and control board in this unit are sensitive to a drop in the 24 v.