Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) TOKOI Hirooki and SOUMA Kenichi,"Outlook for Motor Efficiency Class IE4 and IE5, Including Inverter Drive Motor 2",The Journal of The Institute of Electrical Engineers of Japan,13405551,The Institute of Electrical Engineers of Japan,2017,137,5,297-299,https://cir.nii.ac.jp/crid/1390282679972213120,https://doi.org/10.1541/ieejjournal.137.297