Inside the phase converter control box are a few capacitors. The capacitors hold a will not pass AC voltage, so they build a charge when the AC sine wave is on the positive side and discharge on the negative side of the wave (very simplistic). The MFD rating of the capacitor determines the rate at which it builds and discharges. So by increasing or decreasing the total MFD rating of the capacitors, you can shift the voltage and to some degree the angle of the manufactured leg.
To adjust the voltage, adjust the number or MFD rating of the capacitors. Load will also effect the voltage some. It's pretty hard to adjust the voltage with an adjustable load or no load. You can get it close though.
Motors can handle about 10% voltage imbalance, but electronics like it alot closer. |