Being the inverter device which outputs the 3-phase alternating-current voltage of optional

摘要

PROBLEM TO BE SOLVED: To provide an inverter device capable of attaining high current detecting accuracy by establishing a highly accurate current detecting method even if the number of current sensors is decreased. ;SOLUTION: An AC current value and a power factor angle are determined by using the current sensors of a DC section and the current sensors for one phase of outputted alternating current, and a means of determining a switching pattern of a DC main element and a current component of Idc or a means of detecting the maximum of Idc.;COPYRIGHT: (C)2003,JPO