关键词: 表贴式高速永磁电机, 碳纤维护套强度利用率, 有限元分析, 结构优化

Abstract: Two structures of carbon fiber composite sleeve for high speed rotor were analyzed. There was an area of shear stress concentration between shaft and magnet steel in a structure of fiber composite sleeve aligning the shaft shoulder. The structure of composite sleeve was optimized to align the magnetic steel. Over speed test was carried out on custom devices. The composite sleeve structure aligning the shaft shoulder had obvious cracks when theoretical strength utilization rate was 29.6%, and was destroyed when increasing the test speed. The carbon fiber composite sleeve aligning magnet steeldidn't have cracks even under the condition of 85.7% theoretical strength utilization rate, which verified the rationality of the optimized structure.

Key words: surface-mounted high speed permanent magnet motor, strength utilization of carbon fiber composite sleeve, finite element analysis, structural optimization