Suspension and cost down of bearingless motor with wide gap length

2014 Fiscal Year Final Research Report

• Project/Area Number: 24246046
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Power engineering/Power conversion/Electric machinery
• Research Institution: Tokyo Institute of Technology
• Principal Investigator: CHIBA Akira 東京工業大学, 理工学研究科, 教授 (30207287)
• Co-Investigator(Kenkyū-buntansha): SUGIMOTO Hiroya 東京工業大学, 理工学研究科, 助教 (60613552) ; ASAMA Junichi 静岡大学, 工学部機械工学科, 准教授 (70447522) ; TAKEMOTO Masatsugu 北海道大学, 情報科学研究科, 准教授 (80313336) ; HIJIKATA Kimio 東京都市大学, 工学研究科, 助教 (70710507)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: ベアリングレスモータ / 磁気支持 / 磁気浮上 / 非接触

Outline of Final Research Achievements

In the applications of implantable blood pumps, semiconductor and pharmacy process, needs of bearingless motor has been enhanced recent years. Bearingless motor combines motor and magnetical suspension systems. In pump applications, wide magnetic gap length is required between a rotor and a stator.
In general, motor and magnetic suspension performance become inferior if the gap length is enlarged. Thus, new structures in bearingless motors have been investigated. The gap ratio g/R, where g and R are a gap length and a rotor radius, respectively, more than 0.1, that is about 10 time the conventional motor has been researched and developed.

Free Research Field

磁気支持、磁気浮上工学