| 摘要 |
PROBLEM TO BE SOLVED: To provide an inverter where capacity is made large, voltage is made high, reliability by means of the reduction in the number of parts items can be improved, an input harmonic can be reduced, and a regenerative function can be realized at low cost. SOLUTION: This device is provided with a three-phase inverter 17 having a three-phase rectifier which converts three-phase AC power into DC power and a three-phase inverter, a plurality of single-phase inverters 12 which are connected to the respective phase outputs of the three-phase inverter 17 in series, convert three-phase AC power into DC power with the three-phase rectifier converting AC power into DC power, and output single-phase AC power and a transformer 11 supplying insulated AC power to the rectifier parts of the three phase inverter 17, and a plurality of single-phase inverters 12. |
