Design of Magnetic Bearings for 200 HP Class Turbo Blower

Park, Cheol Hoon; Yoon, Tae Gwang; Park, Jun Yong

doi:10.5293/kfma.2015.18.6.012

Cited by 2 publications

(1 citation statement)

References 3 publications

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“…In addition, since the positions of both ends of the roller can be arbitrarily and easily changed within the air gaps between the shaft core and the electromagnets of the magnetic bearings, it is possible to automatically align the roller so that the printing forces at both ends of the roller can act uniformly. Active magnetic bearings have been used for a wide range of applications including rotors [15], turbo blowers [16], control moment gyroscopes [17], gears [18], and for machining [19]. Existing magnetic bearing rotational machinery focus on the performance of rotating shafts during transmission of a torque, but no study has been done on the use of magnetic bearings to transmit a force as would be required of rollers.…”

Section: Introductionmentioning

confidence: 99%

High-Precision Roller Supported by Active Magnetic Bearings

Park

Yoon²,

Kang

et al. 2019

Applied Sciences

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Featured Application: Printing machines, Roller conveyors, Cleanroom applications.Abstract: Magnetic bearings support rotors in a non-contact way using magnetic force. Therefore, there is no friction and it is possible to measure and control the position of a rotor in the air gap. In this study, the rotational vibration of a roller was minimized using magnetic bearings, and a precision roller capable of automatic alignment using the position control function of magnetic bearings was proposed. A rotation accuracy of approximately 4.6 µm (peak-to-peak) was observed, even under a rotation of 30 rev/min and a radial force load of 300 N. The rotor position control experiment for magnetic bearings showed that 1-µm resolution position control is possible. To further improve the accuracy, the automatic alignment algorithm was proposed using magnetic bearings for the roller misalignment condition, and it was confirmed that alignment is possible at a level that the pressing force difference between both ends of the roller is within 0.3 N. Through this study, it was confirmed that rollers with magnetic bearings can be applied to precision equipment. It is expected that the implementation of the automatic alignment function will simplify the equipment configuration and maintenance compared to conventional rollers with ball bearings.

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