| 摘要 |
PURPOSE:To make the DC outputs of two inverters in parallel equal to each other by changing the switching conditions of the two inverters when the difference of the DC output between the two inverters exceeds a certain value. CONSTITUTION:An output current phase command 14 is input into a logic circuit 15, and it performs the ignition control of a switching element for inverters 7A and 7B through first and second logic circuits. The DC output currents of the inverters 7A and 7B are detected with current detectors 21A and 21B, and the difference is detected with a current deviation detector 22. When the current deviation exceeds the specified value, the flip flop circuit inside the logic circuit 15 changes over, and the relation of the correspondence between the first and second logic circuits and the inverters 7A and 7B becomes reverse. Hereby the outputs of both inverters are controlled to be approximately equal. |
