Ultra High Speed Motor Supported by Air Foil Bearings for Air Blower Cooling Fuel Cells

摘要

This paper presents the development of an ultra high speed permanent magnet synchronous motor(PMSM) that produces output shaft power of 15 kW at 120,000 rpm with the 93% efficiency. The design of electrical machine is interdisciplinary. The design process of electric machines involves continuous iterations of electromagnetic, thermal, structural, and rotor dynamic design and analysis. This paper introduces a rotor with shrink fit, its structural analysis and rotor dynamic and unbalance analysis by 3D FEA and motor design and analysis. An ultra high speed motor prototype for air blower is manufactured cooling fuel cells at the rating of 15 kW, 120,000 rpm. All the performances of the ultra speed motor prototype are verified successfully.