| 摘要 |
At least one drive unit among a first drive unit (9) and a second drive unit (9D) maintains an impeller (10) at a position in the center of the movement range of the impeller (10) inside a pump chamber (7) in a direction along the rotation axis by adjustment, through vector control, of an attractive force acting on the corresponding magnetic body among permanent magnet (17) and permanent magnet (17D). Consequently, even in the event of changes in flow velocity, rotation speed, pressure, and the like, the position of the impeller (10) in the axial direction can be adjusted while changes in rotation torque of the motor are suppressed. Consequently, a centrifugal pump device with improved impeller stability during floating rotation can be provided. |
