| 摘要 |
PROBLEM TO BE SOLVED: To provide a three-phase inverter device and control method therefor, capable of suppressing oscillation of input and output voltage and current more than in the past.SOLUTION: A control circuit 50 for driving semiconductor switching elements 21-26 of an inverter main circuit 20 for three phases includes: effective value calculation part 55 for detecting an effective value of an output current of an inverter main circuit 20; a low-pass filter 56 for calculating a mean value of the output current as a mean-value arithmetic part; a division part 58 for dividing the effective value by the mean value; a compensation value arithmetic part 59 for calculating a command compensation value α proportional to an output of the division part 58; and a multiplication part 54 for multiplying a control command for semiconductor switching elements 21-26 by a command compensation value α, and determines an on-off time of a driving signals of the semiconductor switching elements 21-26 according to a control command after compensation output from the multiplication part 54.SELECTED DRAWING: Figure 2 |
