ORGANIZATION : 한국자동차공학회 추계학술대회 및 전시회
JOURNAL :
YEAR : 2018.11
VOL :
PAGE : 1131-1134
This study investigates overhang effect of ultra-high-speed motor for hydrogen fuel cell electric vehicle, and determines the final overhang length. The rotor shaft of ultra-high-speed motor is mainly made of stainless steel material which can be safe from high mechanical stress caused by high rotation speed. However, it is necessary to confirm characteristics of stainless material because it has different mechanical properties depending on the metal structure. In this paper, the rotor of the motor is surface permanent magnet synchronous motor (SPMSM) type, which is composed, of shaft which is solid shaft type, permanent magnet and can. Material of the shaft is determined by SUS630, which is safe from the target rotation speed. However, SUS630 has a relatively high magnetic permeability. Therefore, it causes axial direction leakage in the shaft structure of the target model in which the shaft and the PM is attached in the axial direction. To overcome this problem, permanent magnet overhang effect according to changing the overhang length is applied to minimize the decreasing performance caused by the leakage magnetic flux, and is determined to satisfy the output.