IDEAS home Printed from https://ideas.repec.org/a/gam/jeners/v16y2023i18p6707-d1243294.html
   My bibliography  Save this article

Improving Efficiency of a Pole-Changing Vernier Machine Considering Residual Magnetic Flux Density

Author

Listed:
  • Sung-Hyun Lee

    (Department of Electrical and Electronic Engineering, Hanyang University, Ansan 15588, Republic of Korea)

  • Jung-Woo Kwon

    (Department of Electrical and Electronic Engineering, Hanyang University, Ansan 15588, Republic of Korea)

  • Byung-Il Kwon

    (Department of Electrical and Electronic Engineering, Hanyang University, Ansan 15588, Republic of Korea)

Abstract

This paper presents the efficiency improvement of a pole-changing vernier machine (PCVM) by considering the residual magnetic flux density ( B r ) of low coercivity force (LCF) permanent magnets (PMs). The PCVM operates in two modes: vernier machine (VM) mode and permanent magnet synchronous machine (PMSM) mode, achieved through pole-changing. Pole-changing involves reversing the magnetic flux direction of LCF PM to alter the number of rotor pole pairs. By changing the number of rotor pole pairs, the PCVM operates as a VM mode at low speeds, providing high torque, and as a PMSM mode at high speeds, offering high efficiency. To achieve this, a combination of high coercivity force (HCF) PM and LCF PM is utilized in a single structure. The magnetic flux direction in the LCF PM is determined by B r , and the highest efficiency is achieved when B r reaches its maximum value | B r m |. This paper focuses on improving efficiency by obtaining B r m in VM mode and − B r m in PMSM mode through the design process. Additionally, finite element analysis (FEA) is employed to compare the performance of the improved model, which considers B r , with that of the conventional model, designed without considering B r . The improved model achieves higher B r values in each mode compared to the conventional model, resulting in increased torque density. Consequently, this leads to improved efficiency.

Suggested Citation

  • Sung-Hyun Lee & Jung-Woo Kwon & Byung-Il Kwon, 2023. "Improving Efficiency of a Pole-Changing Vernier Machine Considering Residual Magnetic Flux Density," Energies, MDPI, vol. 16(18), pages 1-12, September.
  • Handle: RePEc:gam:jeners:v:16:y:2023:i:18:p:6707-:d:1243294
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/1996-1073/16/18/6707/pdf
    Download Restriction: no

    File URL: https://www.mdpi.com/1996-1073/16/18/6707/
    Download Restriction: no
    ---><---

    References listed on IDEAS

    as
    1. Xin Ba & Zhenjie Gong & Youguang Guo & Chengning Zhang & Jianguo Zhu, 2022. "Development of Equivalent Circuit Models of Permanent Magnet Synchronous Motors Considering Core Loss," Energies, MDPI, vol. 15(6), pages 1-18, March.
    Full references (including those not matched with items on IDEAS)

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    1. Wojciech Szelag & Cezary Jedryczka & Mariusz Baranski & Milena Kurzawa, 2024. "Design, Analysis and Experimental Verification of a Coreless Permanent Magnet Synchronous Motor," Energies, MDPI, vol. 17(7), pages 1-17, March.
    2. Lian Hou & Youguang Guo & Xin Ba & Gang Lei & Jianguo Zhu, 2024. "Efficiency Improvement of Permanent Magnet Synchronous Motors Using Model Predictive Control Considering Core Loss," Energies, MDPI, vol. 17(4), pages 1-18, February.
    3. Vadim Kazakbaev & Aleksey Paramonov & Vladimir Dmitrievskii & Vladimir Prakht & Victor Goman, 2022. "Indirect Efficiency Measurement Method for Line-Start Permanent Magnet Synchronous Motors," Mathematics, MDPI, vol. 10(7), pages 1-14, March.
    4. Youguang Guo & Yunfei Yu & Haiyan Lu & Gang Lei & Jianguo Zhu, 2024. "Enhancing Performance of Permanent Magnet Motor Drives through Equivalent Circuit Models Considering Core Loss," Energies, MDPI, vol. 17(8), pages 1-17, April.
    5. Roystan Vijay Castelino & Pankaj Kumar & Yashwant Kashyap & Anabalagan Karthikeyan & Manjunatha Sharma K. & Debabrata Karmakar & Panagiotis Kosmopoulos, 2023. "Exploring the Potential of Kite-Based Wind Power Generation: An Emulation-Based Approach," Energies, MDPI, vol. 16(13), pages 1-22, July.

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:gam:jeners:v:16:y:2023:i:18:p:6707-:d:1243294. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: MDPI Indexing Manager (email available below). General contact details of provider: https://www.mdpi.com .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.