| 摘要 |
PURPOSE:To bring the operation of a power converter after the recovery of service power to a continuous state to a state before instantaneous service interruption smoothly and in a control manner by simulating controlled variable during instantaneous service interruption. CONSTITUTION:Flux currents i1d during instantaneous service interruption are detected from detecting currents I from an output current detector 13 in a flux current detecting circuit 14 even during instantaneous service interruption, and a flux simulation circuit 15 simulates magnetic flux PHIs during instantaneous service interruption on the basis of flux currents i1d detected during instantane ous service interruption. When the recovery of a service-interruption detecting circuit 6 is detected, a flux reset circuit 12 releases the flux current reference i*1d=0 of a flux control circuit 11, and the flux current reference i*1d after recovery is computed by the flux control circuit 11 from a flux reference PHI*from a function generating circuit 10 and the magnetic flux PHIs during instantane ous service interruption. |
