| 摘要 |
PURPOSE:To achieve an unbalanced compensation by positively perfoming a three-phase unbalanced output. CONSTITUTION:In an inverter, a three-phase unbalanced output is performed via a transformer having a phase-shifting winding on the basis of the output instruction of a three-phase AC amount. In the inverter, the inverse matrix [M]<-1> of a matrix [M] which uses the number of turns (a) of a main winding in individual phases of the transformer and the number of windings (b), (c) of the phase-shifting winding are used as elements is found, it is multiplied by a three-phase AC output voltage target value by means of an operation device 41, and an instruction value which the inverter is to output is found. Thereby, a mutual interference between the individual phases is suppressed. |
