| 摘要 |
The present invention relates to a direct AC power converting apparatus capable of reducing inrush current. A control section (5) controls a current-source converter (1) in a state in which a switch (S1) is in conduction, and performs voltage doubler rectification on a voltage between a neutral phase input line (ACLn) and any of input lines (ACLr, ACLs, ACLt) to provide for charging of clamp capacitors (Cc1, Cc2). Accordingly, the clamp capacitors (Cc1, Cc2) are charged through a resistor (R1), which prevents an inrush current from flowing therethrough. In addition, a voltage between both ends of a pair of the clamp capacitors (Cc1, Cc2) is higher than, for example, a voltage between both ends of a pair of capacitors (Cr, Cs). Accordingly, even if the clamp capacitors (Cc1, Cc2) and, for example, the capacitors (Cr, Cs) are electrically connected to each other in a normal operation, it is possible to prevent the inrush current from flowing from the capacitors (Cr, Cs) to the clamp capacitors (Cc1, Cc2). |
