Scholarlink

<p>Inter-turn short-circuit fault (ITSF) in oil-immersed stator high-speed permanent-magnet generators (HSPMG) cause localized losses and hazardous temperature rise. A fluid-solid coupling model is established by combining computational fluid dynamics (CFD) with lumped parameter thermal network (LPTN). The influence of contact resistance on short-circuit current, magnetic field distribution and radial electromagnetic force density is analyzed, and the mechanism of magnetic field distortion caused by ITSF fault is expounded. In addition, the distribution of short-circuit winding loss and rotor eddy current loss under different fault severity is also studied to identify the heat source distribution. The steady-state and transient thermal characteristics of the generator are studied, and the temperature variation law of the generator under various fault conditions is revealed. The research results provide a theoretical basis for further understanding the thermal insulation performance and electrothermal response characteristics of HSPMGs and provide guidance for fault-tolerant design and reliability improvement of HSPMG.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Study on the Influence of Inter-Turn Short-Circuit Fault on the Electromagnetic–Fluid–Thermal Characteristics of High-Speed Permanent Magnet Generator

  • 期刊论文

  • 发表日期：

    2026年6月30日

查看全文
  • Ran Yi,
  • Si Chen,
  • Jianan Lu,
  • Hongbo Qiu

摘要

Inter-turn short-circuit fault (ITSF) in oil-immersed stator high-speed permanent-magnet generators (HSPMG) cause localized losses and hazardous temperature rise. A fluid-solid coupling model is established by combining computational fluid dynamics (CFD) with lumped parameter thermal network (LPTN). The influence of contact resistance on short-circuit current, magnetic field distribution and radial electromagnetic force density is analyzed, and the mechanism of magnetic field distortion caused by ITSF fault is expounded. In addition, the distribution of short-circuit winding loss and rotor eddy current loss under different fault severity is also studied to identify the heat source distribution. The steady-state and transient thermal characteristics of the generator are studied, and the temperature variation law of the generator under various fault conditions is revealed. The research results provide a theoretical basis for further understanding the thermal insulation performance and electrothermal response characteristics of HSPMGs and provide guidance for fault-tolerant design and reliability improvement of HSPMG.