| 摘要 |
PURPOSE:To stably convert without continuing an unstable phenomenon by reducing the output current of a power converter by an automatic control system at a power source switching time. CONSTITUTION:A voltage reference eRef and the maximum voltage elimit set by a setter 43 input, and the difference DELTAe=elimit-eRef is calculated at an AC power source switching time. An adder 44 inputs a voltage reference eRef from the voltage difference DELTAe, and calculates the second voltage reference eRef= eRef+DELTAe. Thus, when a switch 19 is closed, a voltage controller 25 increases at its feedback amount. Accordingly, the voltage is controlled by reducing the current reference iRef of the output. Accordingly, since the voltage controller operates in the direction for reducing the current in operation in parallel with the AC power source, the output current of the inverter does not become unstable, but the switching operation can be completed. |
