| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a motor, pump with motor as drive source, and pump-driven apparatus using the same, capable of achieving noise reduction and low vibration. <P>SOLUTION: The motor 1 includes a plurality of stators 3, 4 having stator cores 31, 41 and winding wires 32, 42; a permanent magnet 22; and at least one rotor 2 that rotates around a rotating shaft 21. The plurality of stators 3, 4 and the rotors 2 are arranged to be concentric. A length L2 of the external stator 4 in the rotating shaft 21 direction is set to be shorter than a length L1 of the internal stator 3 in the rotating shaft 21 direction. <P>COPYRIGHT: (C)2012,JPO&INPIT |
