TABLE OF CONTENTS 
| ? | Phaseback angle delay of conduction angle from earliest possible point | |
| u | Commutation or overlap angle duration of current transfer between phases and width of commutation notch in voltage | |
| Xpu | Source reactance per unit short circuit reactance on converter rating base | |
| k | Ratio of reactance on line side of PCC to total reactance; k = X1/( X1 + X2) | |
| Erms | RMS AC line-to-line voltage | |
| Edo | Open-circuit DC output voltage of converter with no phase- back ( ? = 0) | |
| Ed | DC output voltage under rated load | |
| cos(?) | Displacement power factor cosine of angle between fundamental line-to-neutral voltage and fundamental current | |
| Irms | RMS AC line current | |
| Id | DC load current | |
| Ipu | Per unit AC or DC load current | |
| Ihpu | Per unit harmonic line current at harmonic, h | |
| THDv | Voltage total harmonic distortion at PCC | |
| Ifpu | Per unit peak asymmetric fault current | |
| PCC | Point of common coupling between utility and customer usually the metering point |
Edo = 1.35 Erms
Ed = Edo[cos( ?) Xpu/2)]
Ed = Edo(1 Xpu/2) ( ? = 0)
Edpu = cos( ?) Xpu/2
Edpu = 1 Xpu/2 ( ? = 0)
cos( ? + u) = cos( ?) Xpu
cos( u) = 1 Xpu
