| 摘要 |
PURPOSE:To realize such control as the power factor of secondary current will be 1 by carrying out feedback control based on comparison between a secondary current command and an actual secondary current, and then carrying out output voltage control of an converter. CONSTITUTION:A secondary current peak value command Im* is operated based on the sum of an output from a feedback loop for bringing the difference between a voltage command Ed* and an actual voltage Ed to zero and the feedforward term of load current IL. Phase correction omegat proportional to the secondary current peak value command Im* is operated for the phase omegat of a sinusoidal signal si synchronized with zero point of the secondary voltage Es, then the phase correction omegat is added and a sinusoidal signal sin is pro duced for the corrected phase, thereafter the sinusoidal signal sin is multiplied by the secondary current peak value command Im* thus producing a secondary current command Is*. Then converter output voltage is operated based on the difference between the output from the feedback loop for bringing the difference between the secondary current command Is* and the actual secondary current Is to zero and the actual secondary voltage Es, and voltage control of converter is carried out based on the converter output voltage. |
