Centrifugal fluid pump apparatus

Details Centrifugal fluid pump apparatus Centrifugal fluid pump apparatus

2006-10-31

2006-10-31

Kim, Tae Jun (Department: 3746)

Pumps

Condition responsive control of pump drive motor

Having timer or delay means

C417S044100, C604S151000

Reexamination Certificate

active

07128538

ABSTRACT:
A centrifugal fluid pump apparatus includes a control mechanism including an emergency impeller rotation function. The emergency impeller rotation function includes a rotation termination function when the failure detection function detects a failure; impeller magnetic counterforce application function to apply a current to the electromagnet sufficient to overcome the magnetic attraction force of the rotor to the impeller caused by the magnet; hydrodynamic levitation control detection function to detect rotation of the impeller and the rotor by using a motor current monitored by the motor current monitoring function; motor speed control function for increasing the motor speed up to a predetermined value after the hydrodynamic levitation control detection function detects that the hydraulic bearing coupling between the impeller and the rotor has been made; and impeller magnetic counterforce termination function to terminate current to the electromagnet once the predetermined impeller rotation speed is reached.

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