Influences of Soft Magnetic Materials on Power Efficiency of Electromagnetic Repulsion Mechanism

LI Xiaolin; ZHU Zhexiao; CHEN Ming; LI Yan; YUAN Zhao; HE Junjia

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Influences of Soft Magnetic Materials on Power Efficiency of Electromagnetic Repulsion Mechanism

更新时间：2025-12-08

- Influences of Soft Magnetic Materials on Power Efficiency of Electromagnetic Repulsion Mechanism
- Vol. 46, Issue 2, Pages: 586-593(2020)
- 作者机构：
  
  1. 南方电网科学研究院有限责任公司
  2. 华中科技大学强电磁工程与新技术国家重点实验室
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published Online：29 February 2020，
  
  Published：2020
- 稿件说明：
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LI Xiaolin, ZHU Zhexiao, CHEN Ming, et al. Influences of Soft Magnetic Materials on Power Efficiency of Electromagnetic Repulsion Mechanism[J]. 2020, 46(2): 586-593.
DOI：

LI Xiaolin, ZHU Zhexiao, CHEN Ming, et al. Influences of Soft Magnetic Materials on Power Efficiency of Electromagnetic Repulsion Mechanism[J]. 2020, 46(2): 586-593. DOI：

摘要

机械开关的快速性是决定高压直流断路器性能的关键因素。电磁斥力机构具有动作延迟短、刚分速度快的特点

适合于快速机械开关的应用场合

但涡流斥力的驱动原理也导致其能量转换效率较低。为了提高出力效率

首先建立了电磁斥力机构的3维有限元仿真模型

并通过40.5 kV/2 000 A机械开关样机验证了仿真的准确性。然后

分析了机构运动过程中的磁场分布情况

指出空间漏磁较大是造成其效率低下的主要原因。最后

为了减小空间漏磁

进一步提高电磁斥力机构的出力效率

在原有空心线圈结构基础上

计算并分析了添加不同导磁材料对机构运动特性及出力效率的影响。仿真结果表明:选择低电导率高磁导率材料、在铁芯上径向开槽以及选择叠片形铁芯可以有效改善磁路

提高电磁斥力机构的出力效率。

Abstract

The speed of a mechanical switch is a key factor to the performance of HVDC circuit breaker. The electromagnetic repulsion mechanism（ERM） has the characteristics of short motion delay and fast opening speed

which is suitable for the application of fast mechanical switch. However

the driving principle of eddy current repulsion force also leads to low energy conversion efficiency. In order to improve the power efficiency

3 D-finite-element simulation model of ERM is established

and the accuracy of simulation is verified by 40.5 kV/2 000 A mechanical switch prototypes. Then

by analyzing the distribution of magnetic field in the process of mechanism motion

it is pointed out that large magnetic flux leakage is the main cause of low efficiency. Finally

in order to reduce the space magnetic flux leakage and improve the power efficiency of ERM

based on the original hollow coil structure

the influence of adding different soft magnetic materials is analyzed. The simulation results show that the core material with low conductivity and high permeability

the radially slotted core

and the laminated core

can effectively optimize the magnetic circuit and improve the power efficiency of ERM.

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Related Author

ZHU Zhexiao

YUAN Zhao

CHEN Lixue

XU Ming

HE Junjia

JING Xin

CHEN Lixue

PAN Yuan

Related Institution

State Key Laboratory of Advanced Electromagnetic Engineering and Technology,School of Electrical and Electronic Engineering,Huazhong University of Science and Technology

State Grid Henan Electric Power Company

Key Laboratory of Pulsed Power Technology, Ministry of Education, Huazhong University of Science and Technology

College of Electric Engineering, Naval University of Engineering

School of Electrical Engineering, Dalian University of Technology

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