Calculation and Analysis of Magnetic-thermal-mechanical Properties of Dry-type Variable Frequency Transformer

LI Xinran; WANG Jianmin; DU Zhenbin; LIU Lanrong; QIN Jinli; YANG Ying

doi:10.13296/j.1001-1609.hva.2026.03.010

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Calculation and Analysis of Magnetic-thermal-mechanical Properties of Dry-type Variable Frequency Transformer

Research & Analysis | 更新时间：2026-03-11

- Calculation and Analysis of Magnetic-thermal-mechanical Properties of Dry-type Variable Frequency Transformer
- High Voltage Apparatus Vol. 62, Issue 3, Pages: 80-88(2026)
- 作者机构：
  
  河北工业大学省部共建电工装备可靠性与智能化国家重点实验室，天津 300130
  河北工业大学河北省电磁场与电器可靠性重点实验室，天津 300130
  保定天威保变电气股份有限公司河北省输变电装备电磁与结构性能重点实验室，河北保定 071056
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2026.03.010
  CLC：
- Received：21 July 2025，
  
  Revised：2025-09-25，
  
  Published：16 March 2026
- 稿件说明：
移动端阅览
LI Xinran, WANG Jianmin, DU Zhenbin, et al. Calculation and Analysis of Magnetic-thermal-mechanical Properties of Dry-type Variable Frequency Transformer[J]. High Voltage Apparatus, 2026, 62(3): 80-88.
DOI：

LI Xinran, WANG Jianmin, DU Zhenbin, et al. Calculation and Analysis of Magnetic-thermal-mechanical Properties of Dry-type Variable Frequency Transformer[J]. High Voltage Apparatus, 2026, 62(3): 80-88. DOI： 10.13296/j.1001-1609.hva.2026.03.010.

摘要

磁浮列车牵引供电系统中的输出变压器，通常在不同频率下运行。为了保证此类变压器的运行可靠性和分析频率变化对其性能参数的影响，文中对一台干式变频变压器在3种运行工况下的磁热力进行了研究。首先，在测量3种频率下铁心材料磁特性的基础上，采用场—路耦合法对各工况下的磁场分布、损耗及短路阻抗进行了计算与对比分析；然后，基于有限体积法分别计算了有无谐波影响下的温度分布与热点温升；最后对其短路性能进行了仿真研究。结果表明，频率变化对铁心磁密、绕组及硅钢片损耗和短路阻抗具有较明显的影响，3种运行工况下的磁热力性能满足产品设计要求，并为今后干式变频变压器的开发设计提供了参考。

Abstract

The output transformer in the traction power supply system of maglev train usually operates at different frequencies. For assuring the operational reliability of this kind of transformer and analyzing the influence of frequency variation on its performance parameters

in this paper the magnetic-thermal-maehcnical properties of a drytype variable frequency transformer under three operating conditions is studied. First

on the basis of measuring the magnetic characteristics of core materials at three frequencies

the magnetic field distribution

loss and short-circuit impedance under each working condition are calculated and compared by using the field-circuit coupling method. Then

the temperature distribution and hot spot temperature rise with or without harmonic influence are calculated respectively based on the finite volume method. Finally

the short-circuit performance is simulated and studied. The results show that the frequency variation has a significant effect on the core magnetic density

winding and silicon steel sheet loss and short-circuit impedance

the magnetic-thermmal-mechanical properties under the three operating conditions meet the design requirements of the product and provide a reference for the development and design of dry-type variable frequency transformer in the future.

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references

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