| 摘要 |
PROBLEM TO BE SOLVED: To provide a centrifugal liquid pump usually operated in a low power consumption state and provided with an automatic correcting function of improving rigidity when rigidity of the centrifugal liquid pump is reduced. SOLUTION: The centrifugal liquid pump device 1 is provided with a pump part 2 having an impeller 21 rotating inside a housing 20, a rotor 31 provided with a magnet 33 for attracting the impeller, an impeller rotational torque generating part 3 provided with a motor 34 for rotating the rotor 31, a pump device body 5 having an impeller position control part 4 provided with an electromagnet 41 attracting the impeller, and a controller 6. The controller 6 is provided with a motor rotational frequency monitoring function, a storing function of storing an impeller low rigidity rotational frequency range, and a floating position control function of moving a floating position of the impeller 21 to a rotor side when a motor rotational frequency is within the impeller low rigidity rotational frequency range.
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