Pumps – Condition responsive control of pump drive motor – By control of electric or magnetic drive motor
Patent
1995-06-05
1997-09-16
Thorpe, Timothy
Pumps
Condition responsive control of pump drive motor
By control of electric or magnetic drive motor
4174234, 415 90, 310 905, F04B 4906, F04B 1700
Patent
active
056673639
ABSTRACT:
A friction pump, which is equipped with at least one actively controlled magnetic radial bearing, wherein, in order to satisfy the extreme requirements necessary through the tight tolerances of pump elements and an emergency bearing, the high rotational speed and the magnetic support, a special control arrangement for the cooperation of rotor, positional sensors and the magnetic bearing control loop so that a safe operation of the pump at extreme requirements is assured in a simple manner without the use of any additional constructional elements.
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B. Shafai et al., "Magnetic Bearing Control Systems and adaptive Forced Balancing", IEEE Control Systems, Apr. 1994, pp. 4 to 12.
M. H. Ablanian "Construction and Characteristics of Turbomolecular High Vacuum Pumps", Vakuum in der Praxis 1994, No. 1, pp. 20 to 26.
Abstract of Japanese Patent Application No. 4-95156, Feb. 15 1994 vol. 18/No. 90.
Bernhardt Helmut
Larsonneur Rene
Balzers-Pfeiffer GmbH
Thai Xuan M.
Thorpe Timothy
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