| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a serial multiple inverter device capable of continuously supplying power to an AC load with the same output voltage as the voltage before a failure even when a short-circuit failure and the like occurred in at least one of a plurality of unit inverters. <P>SOLUTION: The serial multiple inverter device receives DC power from a rectifier and a smoothing capacitor, forms a serially connected unit inverter group by serially connecting output sides of a plurality of unit inverters in which semiconductor switch elements are bridge-connected, controls opening and closing of the semiconductor switches, and connects a plurality of serially connected unit inverter groups to an AC load. When operation error detection means detects a unit inverter error, a bypass circuit short-circuits an output side of the unit inverter, and circuit protection means opens and protects the unit inverter. In addition, output voltage margin supply means makes up for deficient voltage and continues power supply. <P>COPYRIGHT: (C)2012,JPO&INPIT |
