Patent attributes
A control device stores a plurality of operation patterns associated with each of synchronous numbers and modulation factors, and the synchronous numbers each define the upper limit of the number of switching operations for each switch constituting an inverter. The control device selects an appropriate operation pattern from among the stored operation patterns, and operates each switch on the basis of the selected operation pattern. The control device stores a plurality of operation patterns associated with the same modulation factor for the same synchronous number. In a case where there is a plurality of next patterns as operation patterns corresponding to a next modulation factor, the control device selects, from among the next patterns, an operation pattern with a small change from a currently set operation pattern.
