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The interbar current of a squirrel-cage induction motor (IM) flows in the steel sheets when the secondary conductor is not insulated from the laminated steel sheets. It was reported that the interbar current loss was increased when skewing the rotor core. This paper aims to analyze a skewed IM using the three-dimensional (3D) finite element method. The effects of rotor skew on the interbar current are clarified.

In this paper, a skewed squirrel-cage IM is analyzed in three patterns of skewed angle. The calculated results were compared with each other. If all laminated steel sheets are divided by the mesh with actual thickness, the huge calculation time is required. In the method applied in the study, several steel sheets are divided by the mesh with the actual thickness and some steel sheets are assumed to be the steel lump between them to shorten the calculation time.

The paper describes that the distribution of interbar current loss when rotor is skewed is different from that when rotor is not skewed. In addition, the paper suggests that the larger the skew angle becomes, the larger the interbar current loss becomes.

In this paper, a skewed IM with the consideration of the interbar current in the laminated steel sheets was analyzed using the 3D finite element method. The influences of the rotor skew on the interbar current are clarified.

In Japan, virtual exchange and mobility are regarded as an emergency response to the COVID-19 pandemic and as alternatives to international learning through physical mobility. International educators express concerns that online international learning methods may fade away after physical student mobility resumes on a larger scale. However, it is crucial for universities to leverage newly developed online learning tools after the pandemic in order to offer inclusive international education which reaches the larger student pool who are unable to study abroad. Now is the time to reflect on how international education policy and practice have relied excessively on cross-border student mobility. In turn, it will be important to position ICT-based educational practices as an opportunity to create new value and meaning for international education in an environmentally friendly and low-cost manner in the new normal world. Also, in Japan, internationalization at home was not addressed to any great extent before the pandemic. However, there is an increasing awareness that ICT-based international education can effectively contribute to the expansion of internationalization at home. Adapting to the new normal situation requires a new modality of internationalization, and it will have a significant impact on the attractiveness of higher education in the country.