It's an old motor , 3/4 hp . And it's a universal motor , with a flat disc commutator and brushes that can be rotated to reverse motorrotation . I was looking at it today and saw on the tag that it can be operated on 110 or 220 volts ... Currently it's wired with the armature and field windings in parallel , I believe that's called shunt . I was operating it on 110 volts on my lathe (until I got a smaller unit , this thing is huge) . I have a project that I might use it on , but I'd like to go 220V . Am I correct in assuming that hooking the windings in series will convert it to 220 ? Since this motor is a universal motor , is it speed controllable by varying the voltage ?
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