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<p>The Gramme-ring-winding high-speed permanent magnet generator (GHSPMG) is an attractive emergency power supply solution due to its high power density and efficiency. This study investigates the multi-physics characteristics of inter-turn short-circuit (ITSC) faults in the GHSPMG with its unique Gramme-ring-winding structure. Compared to traditional distributed windings, the Gramme-ring-winding demonstrates distinct topological features and fault response characteristics, revealing limitations in conventional ITSC analysis methods. An analytical-finite element coupling method is proposed to study the electromagnetic, vibrational, and thermal behaviors under ITSC faults. An electromagnetic model of the GHSPMG under ITSC faults was established to analyze air-gap magnetic field variations. Based on the Maxwell tensor method, the impact of short-circuit current on electromagnetic vibration was investigated, showing a 38.1% increase in the maximum electromagnetic force and vibration accelerations at 2f frequency rising by 15.2% and 70.7% under 2-turn and 4-turn ITSC conditions, respectively. Fluid-structure coupling analysis revealed a 48.4% maximum temperature rise under fault conditions. Experimental results validate the theoretical analysis.</p>

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Multi-physics analysis of electromagnetic, vibration, and temperature fields for short-circuit faults in GHSPMG

  • 期刊论文

  • 发表日期：

    2026年2月23日

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  • Hongbo Qiu,
  • Yunzhuang Wang,
  • Huaiyuan Zhang,
  • Zexing Li,
  • Cunxiang Yang

摘要

The Gramme-ring-winding high-speed permanent magnet generator (GHSPMG) is an attractive emergency power supply solution due to its high power density and efficiency. This study investigates the multi-physics characteristics of inter-turn short-circuit (ITSC) faults in the GHSPMG with its unique Gramme-ring-winding structure. Compared to traditional distributed windings, the Gramme-ring-winding demonstrates distinct topological features and fault response characteristics, revealing limitations in conventional ITSC analysis methods. An analytical-finite element coupling method is proposed to study the electromagnetic, vibrational, and thermal behaviors under ITSC faults. An electromagnetic model of the GHSPMG under ITSC faults was established to analyze air-gap magnetic field variations. Based on the Maxwell tensor method, the impact of short-circuit current on electromagnetic vibration was investigated, showing a 38.1% increase in the maximum electromagnetic force and vibration accelerations at 2f frequency rising by 15.2% and 70.7% under 2-turn and 4-turn ITSC conditions, respectively. Fluid-structure coupling analysis revealed a 48.4% maximum temperature rise under fault conditions. Experimental results validate the theoretical analysis.