Design and analysis of tubular permanent magnetic linear generator with 120° phase belt toroidal windings

• Jikai Si ^[1] ; Zuoguang Yan ^[1] ; Rui Nie ^[1] ; Shuai Xu ^[1] ; Chun Gan ^[2] ; Wenping Cao ^[3]
  1. [1] Zhengzhou University

     Zhengzhou University

     China

     
  2. [2] Huazhong University of Science and Technology

     Huazhong University of Science and Technology

     China

     
  3. [3] Anhui University

     Anhui University

     China

     

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• Localización: Compel: International journal for computation and mathematics in electrical and electronic engineering, ISSN 0332-1649, Vol. 40, Nº 4, 2021, págs. 783-801
• Idioma: inglés
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• Resumen

  • Purpose To improve the power density and generation efficiency of the tubular permanent magnetic linear generators (TPMLGs) under realistic sea-stator condition, a TPMLG with 120° phase belt toroidal windings (120°-TPMLG) for wave energy conversion is proposed in this paper.

    Design/methodology/approach First, the structure of the 120°-TPMLG is introduced and its operation principle is analyzed. Second, the design process of the 120°-TPMLG is described. Meanwhile, the finite-element models of the 120°-TPMLG and the TPMLG with traditional fractional pitch windings (T-TPMLG) are established based on the similar overall dimensions. Then, the electromagnetic characteristics of the 120°-TPMLG are analyzed, such as air gap flux density, back electromotive force and load voltage. Finally, a comparative analysis of the magnetic flux density, flux linkage, load and no-load performance of the two generators are conducted.

    Findings The result shows that the 120°-TPMLG has higher power density and generation efficiency than the T-TPMLG.

    Originality/value This paper proposes a TPMLG with 120° phase belt toroidal windings (120°-TPMLG) to improve the power density and generation efficiency.