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A Study on Weight Reduction and High Performance in Separated Magnetic Bearings

Author

Listed:
  • Si-Woo Song

    (Department of Electrical Engineering, Hanyang University, Seoul 04763, Republic of Korea)

  • Won-Ho Kim

    (Department of Electrical Engineering, Gachon University, Seongnam 13120, Republic of Korea)

  • Ju Lee

    (Department of Electrical Engineering, Hanyang University, Seoul 04763, Republic of Korea)

  • Dong-Hoon Jung

    (Department of Mechanical, Automotive and Robot Engineering, Halla University, Wonju 26404, Republic of Korea)

Abstract

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).

Suggested Citation

  • Si-Woo Song & Won-Ho Kim & Ju Lee & Dong-Hoon Jung, 2023. "A Study on Weight Reduction and High Performance in Separated Magnetic Bearings," Energies, MDPI, vol. 16(7), pages 1-13, March.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:7:p:3136-:d:1111931
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    References listed on IDEAS

    as
    1. Peter Haidl & Armin Buchroithner, 2021. "Design of a Low-Loss, Low-Cost Rolling Element Bearing System for a 5 kWh/100 kW Flywheel Energy Storage System," Energies, MDPI, vol. 14(21), pages 1-28, November.
    2. Jintao Ju & Peng Xu & Shuqing Li & Tong Xu & Fangming Ju & Jiahui Du, 2023. "Design and Optimization Method with Independent Radial and Axial Capacity for 3-DOF Magnetic Bearings in Flywheel," Energies, MDPI, vol. 16(1), pages 1-14, January.
    3. Pulivarthi Nageswara Rao & Ramesh Devarapalli & Fausto Pedro García Márquez & Hasmat Malik, 2020. "Global Sliding-Mode Suspension Control of Bearingless Switched Reluctance Motor under Eccentric Faults to Increase Reliability of Motor," Energies, MDPI, vol. 13(20), pages 1-38, October.
    4. Gang Liu & Xu Liu, 2018. "Integrated Design of a High Speed Magnetic Levitated Brushless Direct Current Motor System," Energies, MDPI, vol. 11(5), pages 1-25, May.
    5. Weiyu Zhang & Zhen Wang, 2023. "Accurate Modeling and Control System Design for a Spherical Radial AC HMB for a Flywheel Battery System," Energies, MDPI, vol. 16(4), pages 1-20, February.
    6. Mohammad Siamaki & James G. Storey & Lars Wiesehoefer & Rodney A. Badcock, 2022. "Design, Build, and Evaluation of an AC Loss Measurement Rig for High-Speed Superconducting Bearings," Energies, MDPI, vol. 15(4), pages 1-8, February.
    7. Xiaoyuan Wang & Yaopeng Zhang & Peng Gao, 2020. "Design and Analysis of Second-Order Sliding Mode Controller for Active Magnetic Bearing," Energies, MDPI, vol. 13(22), pages 1-14, November.
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