XV Deng hui, SHI Cen wei, ZHANG jian, HUANG Xiao yan

 

(School of Electrical Engineering, Zhejiang University, Hangzhou 310027, China)

 

 

Abstract: Aiming at the problems that the stressintensity is too large and the system is instable caused by the working speed passing the critical speed in flywheel energy storage system (FESS) supported by active magnetic bearing, the material edge line speed, the bending stress, critical speed of shaft were studied. The parameter design requirements of flywheel in FESS were summarized, aiming at lightweight and with constraints of energy storage requirements, material edge line speed, bending force and critical speed requirements. An optimal design was proposed. The research results indicate that the parameters of the flywheel body can meet the needs of the actual operation and the scheme is the most lightweight one.

 

Key words: flyuheel energy storage system; optimal design; modal analysis; strength analysis