| 摘要 |
PURPOSE:To suppress the current dispersion among inverter devices connected in parallel within a fixed value by giving control signal in pulse shape to the integration control of a voltage controller, according to the dispersion of currents among the inverter devices connected in parallel. CONSTITUTION:The output detected by the current detector 6 installed on the output side of an inverter device at large is inputted as a detected current 41 into a gain 43 and is increased 1/n time. The output of the current detector 3a installed on the output side of an inverter 10a is subtracted as a detected current 42 from the detected current 41 being increased 1/n time, so as to seek the deviation. This deviation is converted on the coordinate synchronized with the output voltage by a vector converter 32 so as to get an unbalance current. This unbalance current is proportional to the dispersion of the output current between inverter devices 10a and 10b connected in parallel. Accordingly, by suppressing the unbalance current to a fixed value or under, the dispersion of the output current between the inverters 10a and 10b can be suppressed to a fixed value or under. |
