| 摘要 |
PROBLEM TO BE SOLVED: To provide a pump driving device, having high versatility and realizing energy-saving and reduction of size by restraining extra pressure loss of a pump due to a flow change caused by configuration of a piping system and opening and closing of a valve. SOLUTION: This pump driving motor 6 includes a motor control circuit 7 adapted to control the pump pressure according to a flow rate on the basis of correlation (ω=ωO + coefficient A×motor current I) (whereinωO is a motor basic rotational frequency) that when a flow rate of a fluid flowing through a pump chamber 2 changes, the rotational frequency of a rotary blade 3 body linearly changes depending on increase/decrease of a motor current. COPYRIGHT: (C)2004,JPO&NCIPI
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