Suppose i had a smaller power req' and had some compressor CSR motors .... Maybe i could put them together and soft start them and never load them til RPM dropped , i might get some use from that setup , of course , you'd need 220vac and big wire ... Of course thats a pain watching a tachometer ! I could even use 2 110vac motors in series across the line, but you'd have some circuitry to balance them , better stick with 2 220vac in parallel and using large flat belts and small shivs to a large shiv to balance the pull on the slower shaft . It would work , but would not be as nice as a 3PH , torquey mill motor . But it would not compare to a 3ph motor if RPM dropped a small drop , say 3550 to 3300 would lose mqybe 50% !. But a 3 ph is not bothered by this , it just pulls fine and at a much better Power factor ....
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17 years ago