| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a control circuit capable of reducing switching loss by periodically stopping switching of switching elements and capable of reducing the difference between the time in which switching elements at a positive electrode side are in an on-state and the time in which switching elements at a negative electrode side are in the on-state. <P>SOLUTION: A control circuit includes: command-value signal generating means for generating command-value signals Xu1, Xv1, and Xw1 from line-voltage command-value signals Xuv, Xvw, and Xwu; and PWM signal generating means for generating PWM signals on the basis of the command-value signals Xu1, Xv1, and Xw1. The command-value signals Xu1, Xv1, and Xw1 are continuously at "0" for a predetermined period, and are continuously at "2" for another predetermined period. As a result, the difference is reduced between the period in which the PWM signals are at a low level and the period in which the signals are at a high level. <P>COPYRIGHT: (C)2013,JPO&INPIT |
