| 摘要 |
PURPOSE: To connect inverters via one transmission line by providing a synchronous frequency input/output circuit with an input/output switching function for obtaining a reception frequency signal by generating a feedback frequency signal or instead of a set frequency command. CONSTITUTION: A synchronous command device is provided with a starting invereter 2' having a synchronous frequency input/output circuit IOC and operating inverters 31'-3n' having the synchronous frequency input/output circuit, consoles 60' and 61'-6n', and a transmission line TRS' for transmitting signals between inverters. The starting inverter 2', the operating inverters 31'-3n', selection switches 41'-4n', a group of electric motors 51n, 52n, 5nn, etc., are started by connecting a group of electric motors to the output side of the starting inverter 2' and switch and connect a group of electric motors to the output side of the related operating inverter after detecting synchronization. |
