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To achieve the lightweight design of electric locomotives, filter reactors are embedded into the traction transformer tank in some vehicle models, sharing the same cooling system and structural support. This paper establishes a three-dimensional magneto-mechanical joint simulation model for a 25 kV traction transformer and its four series-connected reactors. First, the magnetic field and electromagnetic force distribution under load conditions are calculated using the finite element method. Then, modal and harmonic response analyses of the structure are performed using the mode superposition method, systematically studying the influence of reactor embedding on the vibration performance of the traction transformer. The results show that although the two are magnetically independent, the embedding of the reactor still significantly alters the vibration response of the transformer core/windings and the tank through structural coupling, providing an important theoretical basis for the integrated design and vibration control of key locomotive equipment.

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Study on Magneto-Mechanical Coupling Simulation and Vibration Performance of Traction Transformer and Reactor in Electric Locomotive

  • 会议论文

  • 发表日期：

    2026年

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  • Jichao Chen,
  • Zhiqiang Zhao

摘要

To achieve the lightweight design of electric locomotives, filter reactors are embedded into the traction transformer tank in some vehicle models, sharing the same cooling system and structural support. This paper establishes a three-dimensional magneto-mechanical joint simulation model for a 25 kV traction transformer and its four series-connected reactors. First, the magnetic field and electromagnetic force distribution under load conditions are calculated using the finite element method. Then, modal and harmonic response analyses of the structure are performed using the mode superposition method, systematically studying the influence of reactor embedding on the vibration performance of the traction transformer. The results show that although the two are magnetically independent, the embedding of the reactor still significantly alters the vibration response of the transformer core/windings and the tank through structural coupling, providing an important theoretical basis for the integrated design and vibration control of key locomotive equipment.