| 摘要 |
<P>PROBLEM TO BE SOLVED: To facilitate the change, etc. of the number of installed units by enabling the communalization of a controller regardless of the number of installed inverters. <P>SOLUTION: A plurality of inverter units 2-4 are juxtaposed, and each phase currents, which are obtained by detecting each phase currents with detectors 11A-13A, via the resistors 14A-16A whose one end is connected in common, are added up to get an average value, whereupon the voltage across a resistor is equivalent to the amount of slippage from the average value, so based on it, variable ON delay circuits 26A-31A delay ON commands and transmit them to switching elements 5A-10A thereby balancing the currents. Since only the common connection part of the resistor is connected to the controller 32, it can be done regardless of the number of inverters. <P>COPYRIGHT: (C)2007,JPO&INPIT |
