Preamble: I have some power tools with 110/220 single phase AC induction motors. Per documentation from the manufacturer, I have converted many of them to run on 220 (prevents voltage sags on start up inrush). You probably know the drill: 4 wires marked 1&2, 3&4 either wire them in series for 220 or in parallel for 110.
Question: Have I got enough access to the motor internals to make it reverse? Are either of these pairs connected to the start windings? In other words, my understanding is that split-phase AC motors can be reversed by changing the polarity between the start and run windings. Could it really be as simple as reversing 1&2 or 3&4 to effectively change the inputs to the start windings downstream?
If the answer is NO, because the start windings are connected down in the 'guts' of the motor in such a way as to disallow manipulation. How would one determine if a particular motor is 'presenting' the start windings so as to make it reversible? Is there a sure-fire way to identify the start windings? If the start capacitors are external to the motor, does that give me access to the start windings?
The goal here is that I would like to be able to reverse some of my tools. (NOT my band saw for example, but YES to my disc sander). Any help would be much appreciated!
-Karl
Question: Have I got enough access to the motor internals to make it reverse? Are either of these pairs connected to the start windings? In other words, my understanding is that split-phase AC motors can be reversed by changing the polarity between the start and run windings. Could it really be as simple as reversing 1&2 or 3&4 to effectively change the inputs to the start windings downstream?
If the answer is NO, because the start windings are connected down in the 'guts' of the motor in such a way as to disallow manipulation. How would one determine if a particular motor is 'presenting' the start windings so as to make it reversible? Is there a sure-fire way to identify the start windings? If the start capacitors are external to the motor, does that give me access to the start windings?
The goal here is that I would like to be able to reverse some of my tools. (NOT my band saw for example, but YES to my disc sander). Any help would be much appreciated!
-Karl