Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Comparison of long cable impedances using multiphysics and equivalent circuit models

  • Byungju Bae (Department of Electrical and Electronics Engineering, Konkuk University) ;
  • Taehoon Chin (Department of Electrical and Electronics Engineering, Konkuk University) ;
  • Xuanxi Liu (Department of Electrical and Electronics Engineering, Konkuk University) ;
  • Younghoon Cho (Department of Electrical and Electronics Engineering, Konkuk University)
  • Received : 2024.03.31
  • Accepted : 2024.05.28
  • Published : 2024.08.20
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Abstract

When a long cable is included in power conversion systems, it causes adverse effects, such as voltage spikes and ringing at load terminals. These nonideal voltages can break the insulation of electric machines, such as transformers and motors, and reduce their lifespan. To estimate such voltage characteristics, cable impedance should be modeled on the basis of the cable length. In this paper, two cable impedance models, a multiphysics model and an equivalent circuit model, are introduced. The multiphysics model using Ansys Q3D Extractor is suggested in consideration of the structure, material, and length of a practical cable. Meanwhile, the equivalent circuit model can be quickly utilized to examine voltage spikes and frequency. The accuracy of the proposed models is verified through simulation and the experimental results based on a motor drive system equipped with 30 and 100-m cables.

Keywords

Acknowledgement

This work was supported by the National Research Foundation of Korea grant funded by the government of Korea (MSIT, No. 2021R1A5A1031868) and the Technology Innovation Program (No. 20010965, Development of Electronic Current Voltage Transformer and Spacer based on Eco-friendly Solid Insulation) funded by the Ministry of Trade, Industry, and Energy and Korea Evaluation Institute of Industrial Technology of the Republic of Korea.

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