LAPSE:2023.30877
Published Article
LAPSE:2023.30877
A Study on Weight Reduction and High Performance in Separated Magnetic Bearings
Si-Woo Song, Won-Ho Kim, Ju Lee, Dong-Hoon Jung
April 17, 2023
Recently, high-speed motors are receiving a lot of attention in the industrial field. When driving a motor at high speed, the advantages include high power density, high efficiency, and miniaturization. However, the disadvantages of the high-speed operation of motors are mechanical and structural safety. This is because the bearings used in high-speed motors require characteristics such as precision and low friction. There are two prominent types of bearings mainly used in high-speed motors: rolling bearings and magnetic bearings. A feature of rolling bearings is that they reduce frictional resistance by contacting points or lines between the shaft and the bearing. However, the disadvantages of rolling bearings are high mechanical friction losses due to the need for contact with the lubrication system. Maintenance costs are high. For this reason, a lot of research on bearings is being conducted to reduce the frictional loss of bearings and increase their efficiency and reliability. Bearings that are advantageous for high-speed operation are magnetic bearings that do not require lubricants, have no friction loss, and have low maintenance. However, magnetic bearings have disadvantages such as high cost and difficulty in miniaturization. In this paper, a stator with a separated teeth structure was used to compensate for these disadvantages. Using this, a model with miniaturization, light weight, and high manufacturability was proposed. The model name proposed in this study is called the STMB (separated teeth magnetic bearing). There are also disadvantages of the STMB model proposed in this paper. A model that compensates for this drawback is called the HSTMB (hybrid separated teeth magnetic bearing). The HSTMB reduces the weight by removing the back yoke of the stator and has advantages of a high filling rate and high productivity in the form of a module. As a result, high productivity, light weight, and high performance are possible when the HSTMB is applied, which was proven through FEA (finite element analysis).
Keywords
bearing, force, hybrid, magnet, magnetic bearing, PM, separated stator, stiffness, weight reduction
Suggested Citation
Song SW, Kim WH, Lee J, Jung DH. A Study on Weight Reduction and High Performance in Separated Magnetic Bearings. (2023). LAPSE:2023.30877
Author Affiliations
Song SW: Department of Electrical Engineering, Hanyang University, Seoul 04763, Republic of Korea [ORCID]
Kim WH: Department of Electrical Engineering, Gachon University, Seongnam 13120, Republic of Korea [ORCID]
Lee J: Department of Electrical Engineering, Hanyang University, Seoul 04763, Republic of Korea
Jung DH: Department of Mechanical, Automotive and Robot Engineering, Halla University, Wonju 26404, Republic of Korea
Journal Name
Energies
Volume
16
Issue
7
First Page
3136
Year
2023
Publication Date
2023-03-30
Published Version
ISSN
1996-1073
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PII: en16073136, Publication Type: Journal Article
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LAPSE:2023.30877
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doi:10.3390/en16073136
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Apr 17, 2023
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