Rotor dynamics analysis and experiment study of the 20kW/1kWh flywheel energy storage system
Tang Changliang1, Dai Xingjian1, Wang Jian2, Li Yiliang3
1. Department of Engineering Physics, Tsinghua University, Beijing 100084, China;2. China National Nuclear Corporation, Beijing 100082, China; 3. Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China
Abstract:The development trend of flywheel energy storage technology is high power and large capacity. The 20kW/1kWh of flywheel energy storage system was developed for the application background of regenerating break energy in urban rail-traffic. Based on ANSYS software, the dynamic model of the flywheel rotor-bearing-damper system was built to calculate critical speeds, mode shapes and modal damping ratios at different speeds, and modal analysis of the flywheel frame and vacuum container was also carried out. The amplitude-frequency responses of the flywheel dynamic system were obtained in a number of spin tests. The experimental results are in agreement with the ones of numerical simulation, which provides a reliable theoretical and experiment basis for optimization and improvement of the flywheel system.