npsm 새물리 New Physics : Sae Mulli

pISSN 0374-4914 eISSN 2289-0041


Research Paper

New Phys.: Sae Mulli 2021; 71: 156-168

Published online February 26, 2021

Copyright © New Physics: Sae Mulli.

Theoretical Approach to Magnetic Force of Electromagnet

Youngseok JHUN1, Donggeul HYUN2*

1Department of Science Education, Seoul National University of Education, Seoul 06639, Korea

2Department of Science Education, Teachers College, Jeju National University, Jeju 63294, Korea


Received: September 22, 2020; Revised: December 23, 2020; Accepted: December 28, 2020


The quantitative representations for the magnetic forces of an electromagnet acting on ferromagnetic object were derived on the basis of three magnetization theories, the magnetic potential energy method, Gilbert model for magnetism, and Ampere model for magnetism. The magnetic forces of an electromagnet acting on a ferromagnetic object made of cast iron, cast steel, and sheet steel were calculated using the derived quantitative representations.

Keywords: Electromagnet, Magnetic force, Ferromagnetic object, Magnetization theories, Magnetic potential energy method, Gilbert model, Ampere model

전자석이 강자성 물체에 작용하는 자기력에 대한 정량적인 표현이 자기화 이론, 자기포텐샬 에너지 방법, 자기에 대한 길버트 모형, 암페어 모형을 바탕으로 이론적으로 유도되었다. 이 연구에서 유도된 전자석의 자기력에 대한 표현을 사용하여 주철, 주강, 판강으로 이루어진 강자성 물체에 전자석의 작용하는 자기력을 계산하였다.

Keywords: 전자석, 자기력, 강자성 물체, 자기화 이론, 자기포텐샬 에너지 방법, 길버트 모형, 암페어 모형

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