| 摘要 |
<p>In a direct-type converting apparatus including a converter and two inverters, a common-mode current is reduced. An output voltage of a converter (3) is given to a pair of DC power supply lines (L1, L2). Inverters (4,5) are connected in parallel with each other between the DC power supply lines (L1, L2). When one inverter (4) is operated based on a first zero vector and the other inverter (5) is operated based on a second zero vector, a commutation is caused in the converter (3). The first zero vector and the second zero vector are different from each other. For example, all of high-arm side switching elements (Sup1, Svp1 Swp1) of the one inverter (4) and low-arm side switching elements (Sun2, Svn2, Swn2) of the other inverter (5) are rendered non-conducting, and all of low-arm side switching elements (Sun1, Svn1, Swn1) of the one inverter (4) and high-arm side switching elements (Sup2, Svp2, Swp2) of the other inverter (5) are rendered conducting.</p> |
