| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain a power conversion device which can suppress voltage variations of DC bus bars of single-phase inverters, can suppress a surge voltage by decelerating switching speed, and can reduce loss and cost. <P>SOLUTION: In the power conversion device which is connected with the two or more single-phase inverters in series, and feeds AC outputs which are composed from the two or more single-phase inverters to a load, at least one single-phase inverter out of the single-phase inverters having arms connected to the load out of the two or more single-phase inverters is constituted of a one-pulse arm which performs switching when output polarities are switched, and a PWM arm which performs constant PWM switching, and is a PWM inverter which is applied with PWM control. The PWM arms are connected to the load, and the one-pulse arm is connected to the single-phase inverter other than the PWM inverter. <P>COPYRIGHT: (C)2009,JPO&INPIT |
