| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a parallel operation circuit capable of synchronously operating a plurality of synchronous motors in parallel regardless of a difference in the number of poles or outputs by making effective use of a starting operation circuit. <P>SOLUTION: A microcomputer 12 performs the following control: connecting an AC power source 2 with the starting operation circuit 1 to individually start the synchronous motors M1, M2; performing switching operations between operation change-over switches SW1, SW2 when the rotational speed of a magnet rotor reaches around synchronous rotational speed for a power frequency, so as to cut off the connection between the AC power source 2 and the starting operation circuit 1; connecting the AC power source 2 with a synchronous operation circuit 9, and performing shifting operations for synchronous operation for each of the synchronous motors M1, M2 to synchronously operate the synchronous motors M1, M2 in parallel. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
