Pumping hydrodynamic bearing system comprising a drive control apparatus for dynamic bearing pump unit, the drive control unit, a drive control method of the dynamic bearing pump unit

摘要

Disclosed is I improve the durability of the dynamic pressure bearing pump. A drive control apparatus 300 of the fluid dynamic bearing pump unit 1, the rotational speed operating volume 350 for changing the rotational speed of the impeller 10, a computer 310, instructs the power from the power supply circuit 330 from the computer 310 converted in accordance with, and has the power conversion circuit 335 is supplied to the motor 210 of this power pump drive unit 200,. Power conversion circuit 335, in the course of the operation amount of the rotation speed operation volume increases from the operation amount 0, in the initial operation period from the operation amount 0 to a certain amount of operation predetermined, regardless of the operating amount change of the initial operation period not, on condition that the operation amount of the rotational speed operation volume is the amount of specific operation, the impeller 10 is predetermined to minimize the flying speed to be supported in a non-contact state emerged from the dynamic pressure bearing surface rotation As the rotational speed of the impeller is increased by the number rate of change, and controls the power supplied to the motor 210. [Selection Figure] Figure 1