Under the effect of current and voltage

multiple physical fields will generate in and near electrical equipment

such as electromagnetic field

temperature field

fluid field

and stress field

etc. These fields will militate against the dielectric medium

the magnetic medium and the conductor

which are three main types of materials constituting the electrical equipment. For example

they will make an insulating material deteriorated gradually due to the effects of electricity

heat and stress

saturate the permeability magnetic material and lead to harmonic generation

and cause relative movements between conductors in motor equipment

thus to complete electromechanical energy conversion. These physical fields（electromagnetic

temperature

fluid

stress

motion and insulation） are coupled and interact with each other to construct complex multiphysical coupling fields. Firstly

this paper briefly reviews the contributions made by the field of electrical engineering in China to the development of computational electromagnetism

and points out that electromagnetic multiphysical field analysis plays a role through the whole life process of material development

design and manufacture

operation

and maintenance of electrical equipment. It is the "hard core" that determines the economy and reliability of electrical equipment. Then

several key technologies in coupled numerical calculation of electromagnetic multiphysical fields and moving eddy current field in electrical equipment are introduced respectively. This paper specially points out that the discharge voltage calculation or prediction of insulating materials is an important component of electromagnetic multiphysical field simulation and needs to be strengthened. Further

based on the development demands of intelligent operation and maintenance of electrical equipment

this paper introduces the latest achievements in applications of electromagnetic multiphysical field analysis for intelligent inversion detection of hot spot temperature rise and material parameters of electrical equipment. Finally

an idea is proposed to develop an independent software platform for electromagnetic multiphysical field analysis of electrical equipment.